System Developer

Visual Studio 2013 Community - Free Version

2014-11-19T18:27:00.001-03:00

Visual Studio 2013 Community is a new, free, full version of Visual Studio, which can now be downloaded, which provides an extensible ecosystem opportunities and support for any platform, virtually, from devices to desktop machines, since the web platform to cloud.

The IDE of these version of Visual Studio supports multiple types of projects in a single solution file in the IDE and has all the productivity features and extensibility of the IDE, which means you can use Xamarin, ReSharper, and other VsVim VSIX extensions, developers love Visual Studio, Microsoft's own say.

The conditions of his gratuity are:

Every single developer working on a commercial or non-commercial project.
Any developer contributing to an open source project
Any research or an academic school year (eg students, teachers, even online courses)
Any business with 5 or fewer developers working together on a project or business.

There also register for any program. Simply visit the Visual Studio, give click to download button and go. It is important to note that the Express version will still work, but with the limitations thereof, while Community edition is the full version and can be used throughout the SDK without paying a penny.

This makes Visual Studio on par with its competitors, Eclipse, Netbeans and even Android Studio, as well as other commercial IDE. No doubt this will cause improvements in VS code itself eventually. Let's see how things work for Microsoft in this case.

Font: www.unocero.com

Download from here

Visual Studio

Get datarows a datatable that comply conditions C#

2014-10-08T18:50:00.002-03:00

Sometimes we need to filter certain data for display under certain circumstances in our programs. Here are some examples fails with which they can achieve to get rows from a datatable, rows must meet certain conditions.

Example 1:


DataTable data = new DataTable("DataTableName");

DataRow[] rows = datos.Select("columnName = 'Value'");

foreach (DataRow row in rows)
   {
        //do something
   }

Example 2:


DataTable dt = new DataTable();
           
dt = goData(Param);

// FILTERING THE VALUES ABOVE A 2, ONLY TO SHOW THE CURRENT 

DataTable newDt = new DataTable();

// LINQ ONLY FOR NEW RECORDS

var query = from d in dt.AsEnumerable()
            where Convert.ToInt16(d["value"]) > 2
            select d;

// COLLECT THE DATA AND WE INSERT FILTERED IN NEW DATATABLE

newDt = query.CopyToDataTable();

Example 3:


// CAPTURE THE DATATABLE

DataTable dt_Rack = new DataTable();

dt_Rack = (DataTable)ViewState["AMOUNT"];

//LINQ PARA CAPTURAR EL MONTO RACK        
// WE PUT INSIDE A DATAROW AMOUNT 

IEnumerable<DataRow> q = from d in dt_Rack.AsEnumerable()
                         where Convert.ToInt16(d["VALUE"]) == VARIABLE
                         select d;

foreach(DataRow p in q)
   {
       //do something
   }

EEE

See Also:

Convert Object To DataTable in C#

2014-06-11T17:54:00.000-04:00

Reflection using C #

Refraction is a "technique", you could say, to extract the metadata within an assembly nuestrasclases, for example, taking a class called Person, assuming that properties not only has this class name, utilizandoreflections can get a list of all properties that have this class and also get their valores.En the. NET Framework, reflection classes are encuentrandentro System.Reflection namespace.

Too many times we see the need to spend all the properties of an object to a DataTable, Here is an example:

/// <summary>
/// object to DataTable 
/// </summary>
private DataTable parseToDataTable(workspace.TheObject theObject)
{
 DataTable dat = new DataTable();
 
 workspace.TheObject datos = new dworkspace.TheObject();
     
 ///Agregamos las columnas con el tipo de datos correspondiente al Datatable
 foreach (PropertyInfo info in typeof(workspace.TheObject).GetProperties())
 {
   dat.Columns.Add(info.Name, info.PropertyType);
 }

 dat.AcceptChanges();

 DataRow row = dat.NewRow();
 
 //Cargamos los objetos que con los datos recibidos 

 datos = theObject;
 

 foreach (var property in datos.GetType().GetProperties())
 {
  
  row[property.Name] = property.GetValue(datos, null);
  
 }
 
 dat.Rows.Add(row);
 dat.AcceptChanges();
 return dat;
}

/// <summary>
/// object to DataTable 
/// </summary>
private DataTable parseToDataTable(workspace.TheObject.list theObject)
{
 DataTable deta = new DataTable();

 foreach (PropertyInfo info in typeof(workspace.TheObject.Item).GetProperties())
 {
  deta.Columns.Add(info.Name, info.PropertyType); 
 }
 deta.AcceptChanges();
 
 
 foreach (workspace.TheObject.Item item in theObject)
 {
  workspace.TheObject.Item datos = new workspace.TheObject.Item();
  datos = item;
  DataRow row = deta.NewRow();

  foreach (var property in datos.GetType().GetProperties())
  {
   row[property.Name] = property.GetValue(datos, null);
  }
  deta.Rows.Add(row);
 }
 
 deta.AcceptChanges();
 return deta;
}

Creating and Using Sessions in ASP.Net and C#

2014-05-22T16:52:00.000-04:00

The Session object lets you create user sessions having a valid time before expiry , default time is 20 minutes. It has many uses and not just to create sessions , their use is typical in applications with shopping carts, a forum to establish a minimum in order to vote or rewrite a message time.

The same is stored on the server, and is administered by it. In the following example written in C # will see a precarious similación a form that loads an ArrayList Products , and sends it to the server to store it in a session variable , then opening another window even it can be retrieved and listed . The design of the first page is as follows:

<!DOCTYPE html PUBLIC"-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title> </title>
</head>
<body>
    id="Form1" <form runat="server">
    <div>
 
        <table style="width:100%;">
            <tr>
                <td>
                    Product 
  </td>
            </tr>
            <tr>
                <td>
                    <asp:TextBox ID="txtProduct" runat="server"></asp:TextBox>
                    <asp: Button ID = "btnAdd" runat = "server" onclick = "btnAdd_Click" Text = "Add"/>
                </td>
            </tr>
        </table>
 
    </div>
    <asp:HyperLink ID="HyperLink1" runat="server"
        NavigateUrl="~/Examples/Productos.aspx">HyperLink</asp:HyperLink>
    </form>
</body>
</html>

using System;
using System.Collections;
 
public partial class Examples_Sesion : System.Web.UI.Page
{
    protected void Page_Load ( object sender , EventArgs e)
    {
 
    }
    protected void btnAdd_Click ( object sender , EventArgs e)
    {
        ArrayList products;
        if ( Session["s_product"] ! = null)
            products = (ArrayList)Session["s_product"];
       else
            products = new ArrayList();
        productos.Add ( this.txtProducto.Text.ToString ());
        Session["s_product"] = product;
    }
}

On the first page we see a link to this page redirects wanted to build now

<%@Page Language="C#" AutoEventWireup="true" CodeFile="Products.aspx.cs" Inherits="Examples_Products"% >
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    id="Form1" <form runat="server">
    <div>
 
    </div >
    </form>
</body>
</html>

using System;
using System.Collections;
 
public partial class Examples_Products : System.Web.UI.Page
{
    protected void Page_Load (object sender, EventArgs e)
    {
        ArrayList items = new ArrayList();
        if ( Session["s_product"] != null)
        {
            products = (ArrayList) Session ["s_product"] ;
            foreach (string item in items)
                Response.Write(item + "<br/>");
        }
        else
        { Response.Write("No product by product"); }
    }
}

How to change the color of a row of DevExpress ASPxGridView

2014-05-09T12:13:00.000-04:00

Some times we need to paint the ranks of the DevExpress ASPxGridView grid. To do this we must implement the HtmlRowPrepared event, in this event we write our logic.

Below an example of how to implement the event HtmlRowPrepared

protected void listaRegistratos_HtmlRowPrepared(object sender, DevExpress.Web.ASPxGridView.ASPxGridViewTableRowEventArgs e)
        {
            try
            {
                if (e.RowType != DevExpress.Web.ASPxGridView.GridViewRowType.Data) return;
                string value = e.GetValue("STATUS").ToString();

                if (value == "Pendente")
                    e.Row.BackColor = System.Drawing.Color.PowderBlue;
                else if (value == "Ok")
                    e.Row.BackColor = System.Drawing.Color.MediumSeaGreen;
                else if (value == "Error")
                    e.Row.BackColor = System.Drawing.Color.Salmon;
                else if (value == "Em Processo")
                    e.Row.BackColor = System.Drawing.Color.RoyalBlue;
            }
            catch { }
        }

How to modify my App.exe.config keys at runtime

2014-04-11T17:30:00.001-04:00

On some occasions we need to store values in app.config file confirguracion from our own application at runtime.

Without giving a lot of thought I will show one of the methods that I used to do, and is as follows:

System.Configuration.Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);

    config.AppSettings.Settings["Test"].Value = "valueTest";
    config.Save(ConfigurationSaveMode.Modified);

Code Compare - File and Folder Merge Tool

2014-04-08T17:22:00.002-04:00

Code Compare is a free tool designed to compare and merge differing files and folders. Code Compare integrates with all popular source control systems: TFS, SVN, Git, Mercurial, and Perforce. Code Compare is shipped both as a standalone file diff tool and a Visual Studio extension.

In the product documentation you will find how to perform basic and advanced tasks in Code Compare. It gives you necessary information to get started with the application and broaden your skills when you are familiar with simple tasks

Text Comparison and Merging

Colored blocks for inserted, deleted, and modified text
Detailed highlights of changes within lines
Collapsing of unchanged regions of text (Pro-feature)
Point-and-click merging with a mouse
Editing files on the fly
Merging shortcuts for advanced users

Structural Source Code Comparison

Syntax Highlighting for programming languages
Methods are matched in compared source code files
Similar lines of code are matched even after refactoring
Moved blocks of code are detected if source code is reordered in files
Difference Explorer window displays changes in code structure
Code outlining allows collapsing and expanding regions of code

Visual Studio Integration

Native Visual studio extension allows smooth integration
Visual Studio 2010, 2012, and 2013 supported
User can choose to use standalone or integrated version of Code Compare on the fly
Atmel Studio 6.0 and 6.1 supported
More about integration:

with Visual Studio
with other IDE's

Code Review Support

Adding code review comments when comparing source file revisions
Viewing added review comments from a file comparison document
Highlighting of code regions with review comments
Feature works in combination with Review Assistant
Teams benefit more than solo developers

Three-Way Comparison and Automatic Merging

Three comparison panes with horizontal and vertical layouts
Integrates with version control systems as the merging tool for conflicting file revisions
Non-conflicting changes are merged automatically
Merging conflicts are highlighted
One-click conflict resolution with a mouse button

Compares entire hierarchies of folders

Color-coding for added, deleted, and modified files
Filtering options for excluding or including of certain file types
Instant opening of individual file comparison documents
Display options for better comparison result analysis
Batch file copying from pane to pane or to selected folder

VS2010 - Debugging not working

2014-04-02T17:38:00.000-04:00

First of all, you must make sure that indeed the line of code where the breakpoint placed is running normally this type of problem occurs when we want to debug the code never runs.

After having purchased the above, the most practical thing to do is reset the defaults.

We do this as follows:

Menú

Tools

Import and Export Settings

Reset all settings

Force downloading a file from C #

2014-03-15T14:26:00.001-03:00

Force downloading a file from C #
Many times you want your system to download a pdf file or any file automatically and is not open in the browser either because it is a requirement or our conscience tells us to be like that, whatever the reason I leave here a code for can download any type of file.

This method you will be able to place in any class and download the file regardless of page is called, it can be placed in a Utilities class for example.

public void TheDownload(string path)
  {
      System.IO.FileInfo toDownload =
                 new System.IO.FileInfo(HttpContext.Current.Server.MapPath(path));
 
      HttpContext.Current.Response.Clear();
      HttpContext.Current.Response.AddHeader("Content-Disposition",
                 "attachment; filename=" + toDownload.Name);
      HttpContext.Current.Response.AddHeader("Content-Length",
                 toDownload.Length.ToString());
      HttpContext.Current.Response.ContentType = "application/octet-stream";
      HttpContext.Current.Response.WriteFile(patch);
      HttpContext.Current.Response.End();
  }

Disable controls on the page pending the UpdatePanels

2014-02-18T15:22:00.001-03:00

A few months ago we started to develop a client for a fairly complex web application with. NET 3.5 and rather use AJAX. In this application there are several pages that use UpdatePanels, and perform some of these complex processes can take several seconds to reach, which is why our client asked us to, to start these processes, the page is locked so that the user can not perform any other action on it until it completes the pending proceedings. Obviously we did not want to run a script "by hand" each time an action is executed and another at the end of it, so look for ways to automate it a bit. We started looking for proper engine event AJAX Microsoft® and found that we can capture the RequestManager when you initiate a request to the server and when it ends. This can be done using the methods add_endRequest add_initializeRequest and the current instance of PageRequestManager, which can be obtained with the following code: Sys.WebForms.PageRequestManager.getInstance().

In the first event we showed one ModalPopup (control showing a "window" on the page and disables all other controls thereof) of Seller ASP.NET AJAX Control Toolkit from Microsoft®, which contained a message saying "Wait a time..."and so we closed the second event. Then as was shown in the PopUp page:

<cc1:ModalPopupExtender ID="mpeLoading" runat="server" BehaviorID="idmpeLoading"PopupControlID="pnlLoading" TargetControlID="btnLoading" EnableViewState="false"DropShadow="true" BackgroundCssClass="ModalBackground" /><br />
<asp:Panel ID="pnlLoading" runat="server" Width="300" Height="50" HorizontalAlign="Center"CssClass="ModalPopup" EnableViewState="false" Style="display: none"><br />
    <br />Wait a time...</asp:Panel>
<asp:Button ID="btnLoading" runat="server" Style="display: none" />

And here is the JavaScript code:

function initializeRequest(sender, args){
    $find('idmpeLoading').show();
}

function endRequest(sender, args){
    $find('idmpeLoading').hide();
}

Sys.WebForms.PageRequestManager.getInstance().add_initializeRequest(initializeRequest);
Sys.WebForms.PageRequestManager.getInstance().add_endRequest(endRequest);

Next step ModalPopup review the code (the same can be downloaded from the same link I showed above) and found that the panels are set to a fixed value in the zIndex style for display on the other controls. Then we review the properties of the JavaScript object representing the panel and found that it has two interesting items: _backgroundElement and _foregroundElement . These represent the DIVs background and content PopUp respectively, then to these HTML objects are positioned above all others simply have to incrementarles the zIndex property of their style. So our JavaScript code is as shown below:

function initializeRequest(sender, args){
    var mpeLoading = $find('idmpeLoading');
    mpeLoading.show();
    mpeLoading._backgroundElement.style.zIndex += 10;
    mpeLoading._foregroundElement.style.zIndex += 10;
}

function endRequest(sender, args){
    $find('idmpeLoading').hide();
}

Sys.WebForms.PageRequestManager.getInstance().add_initializeRequest(initializeRequest);
Sys.WebForms.PageRequestManager.getInstance().add_endRequest(endRequest);

Finally, to make this functionality is present on every page of our application, we add it to the " master" page of the site, and after that on any page ( that uses this master) possesses the functionality described here.

See Also:

How Do I Add JavaScript UpdatePanel In Runtime

FileUpload Control In Update Panel - ASP.NET AJAX - C#

Force downloading a file from C #

How do I add JavaScript UpdatePanel in Runtime

2014-02-03T16:11:00.001-03:00

To add a function or JavaScript code inside an UpdatePanel, we simply register the script block, you can do it in any event hand, according to our need, it could be in the Page_Load as could also be in the event of a ButtonClick button.
For example:

protected void Page_Load(object sender, EventArgs e)
        {
             // Register the script before assigning the function to the OnClientClick event of the button, there should be a button DevExpress 
             ScriptManager.RegisterStartupScript(this, this.GetType(), "theScriptKey", "MyFunction function (x, y) {alert (x); alert (y);}", true); 
        }

What matters is that prior to the assignment of the call to the button event, we must ensure register block caught JavaScript.

To run this function from some event, for example from a button click event, we assign the call to the function des follows:

protected void Button1_Click(object sender, EventArgs e)
        {
             // Assign the variable eye if a string must incluier single quotes' 
             string param1 = "'added to test alert button from a method with step parametos'"; 
             // Assign the variable 2nd-, eye if a string must incluier single quotes' 
             string param2 = "'Mostamos the second parameter passed to the JavaScript function'"; 

             // Assign to OnClientClick event of the button to the function llamadao with paramstros Ticket 
             Button1.OnClientClick = "MyFunction (" + param1 + "," + param2 + ")";
        }

See also

FileUpload Control In Update Panel - ASP.NET AJAX - C#

Disable Controls On The Page Pending The UpdatePanels

Force downloading a file from C #

SharpDevelop

2014-01-30T09:09:00.000-03:00

SharpDevelop: is a free IDE for C #, VB.NET and Boo projects on the platform. NET from Microsoft. It is open source and you can download both the source code and executables this site. Also, you can find the latest information and changes in the SharpDevelop, and contact the team on foro.

SharpDevelop

FileUpload Control in Update Panel - ASP.NET AJAX - C#

2014-01-27T12:18:00.004-03:00

The FileUpload control will not work inside an UpdatePanel control to upload files using the asynchronous postback. This is because file uploads and handling files are restricted by default on the client side for security reasons.

The file upload controls do not work in AJAX update panels . If your upload control located in an update panel , then the control does not send the file. If you look at the published property control file ( HasFile ), you see that is null.
To resolve this problem we have to rely on a standard data return, ie, we need to adjust the button up the file to be PostBack trigger. This will initiate a normal postback whenever we click on the upload button and then you can upload the file.

You must create a PostBackTrigger for the button that starts the postback as follows.

    <Triggers>
        <asp:PostBackTrigger ControlID="btnEnviar" runat="server" />
    </Triggers>

For Example:

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="Test.ascx.cs" Inherits="componentes.Test" %>
<%@ Register TagPrefix="asp" Namespace="AjaxControlToolkit" Assembly="AjaxControlToolkit" %>
    Namespace="DevExpress.Web.ASPxFileManager" TagPrefix="dx" %>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="conditional">
    <ContentTemplate>
        <asp:Panel ID="panel1" runat="server" CssClass="zpglight" Height="229px">
            <asp:Panel ID="panel3" runat="server" Style="z-index: 400" Height="150px">
                <table width="645px">
                    <tr>
                        <td>
                        </td>
                    </tr>
                    <tr>
                        <td>
                            <asp:Label ID="Label3" runat="server" Text="Enviar o Arquivo:" BackColor="Silver"
                                Width="100%" Font-Bold="True" Height="16px"></asp:Label>
                        </td>
                    </tr>
                </table>
                <table width="645px">
                    <tr>
                        <td>
                            <asp:FileUpload ID="FileUpload1" runat="server" Width="100%" />
                        </td>
                    </tr>
                </table>
                <table width="645px">
                    <tr align="right">
                        <td>
                            <asp:ASPxButton ID="btnEnviar" runat="server" Text="Enviar" OnClick="btEnviar_Click">
                            </asp:ASPxButton>
                        </td>
                    </tr>
                    <tr>
                        <td>
                            <asp:Label ID="Label4" runat="server" Text="" Font-Bold="True" ForeColor="Red"></asp:Label>
                        </td>
                    </tr>
                </table>
            </asp:Panel>
        </asp:Panel>
    </ContentTemplate>
    <Triggers>
        <asp:PostBackTrigger ControlID="btnEnviar" runat="server" />
    </Triggers>
</asp:UpdatePanel>

See also

How Do I Add JavaScript UpdatePanel In Runtime

Disable Controls On The Page Pending The UpdatePanels

Force downloading a file from C #

loadUI an open source tool

2014-01-27T11:51:00.000-03:00

loadUI is an open source tool to measure the maximum load that can support a website and see if we are ready for the most demanding peaks, such as may occur when it is mentioned in any reference portal and Visitors flock.

It is often a website is not ready to receive much traffic and then the joy of seeing our site receives many Internet becomes disappointment. For quite some time that we met another tool called Load Impact, works from anywhere.

Use loadUI is very simple and you only need to join , via drag -and-drop modules that want to use for testing , as we see in the picture above . We can save tests to perform whenever you need, and best of all is that they are made in real time so that we can remove a module or change their behavior and this will be shown instantly.

Via visualbeta

Sitio Web: loadUI

Change header text of columns in a DataGrid ASP.NET C#

2014-01-15T10:23:00.000-03:00

I was researching how to change the header text of columns in a datagrid in ASP.NET.
I found several ways to make a GridView, for any example of how to do it in a DataGrid.
After much research comes to this, and it works. This also serves to the autogenerating columns

We have to use the ItemDataBound event

The example below, if you know other ways please comment.

protected void theDataGrid_ItemDataBound(object sender, DataGridItemEventArgs e)
        {
            if (e.Item.ItemType == ListItemType.Header)
            {
                try
                {
                    e.Item.Cells[1].Text = "header 1";
                    e.Item.Cells[2].Text = "header 2";
                    e.Item.Cells[3].Text = "header 3";
                    e.Item.Cells[4].Text = "header 4";
                    e.Item.Cells[5].Text = "header 5";
                    e.Item.Cells[6].Text = "header 5";
                }
                catch { }
            }
        }

see also

Force downloading a file from C #

Disable controls on the page pending the UpdatePanels

XA5101 Error: Missing Android NDK toolchains directory - The solution - Xamarin

2013-12-13T22:20:00.002-03:00

When I finish developing my first Android application, I found a problem, I could not generate the apk in relese, could not make the publication of the apk, it was quite frustrating because it had cost me much effort to develop the application.

The problem that I found was this:

XA5101 Error: Missing Android NDK toolchains directory '\ toolchains'. Please install the Android NDK. (XA5101)

Fortunately I was able to fix it:

The solution!:

Download the Android NDK from this link:

http://developer.android.com/tools/sdk/ndk/index.html

Then he should unzip downloaded file and open the Xamarin IDE and go to the following menu location:

Tools ==> Options ==> SDK Locations ==> Android

Select the location of the unzipped folder.

Finally Xamarin should close the IDE and start it again. That problem is solved.

Generate a self-signed certificate - KeyTool

2013-12-13T22:07:00.002-03:00

Generate a self-signed certificate - KeyTool

First generate a key pair (public / private) for our organization. This key pair is stored in a self-signed certificate.

This operation is our key store will also create ( from now on we will refer to the certificate store as " keystore" ) if it was not set up yet. The default keystore is created in the " home" of the user name. " Keystore" directory. This keystore is where the self-signed certificate with the key pair (public / private ) will be saved.


$ Keytool- genkey -alias - keypass autentiaCert claveDeAutentiaCert -validity 365 - storepass claveDeKeyStore

• -alias : the name by which we refer to key pair created .

• - keypass : is the key with which we can access the private key of the key pair created .

• -validity : the validity period, in days. In our example, one year.

• - storepass : key to access your keystore .

During the process we will ask for the name and surname (if we are generating a certificate to implement SSL on a Web server on the Internet, we should put the DNS name if the server is in intranet should put the name of the machine), the name of the OU, the organization name, the name of the city, the name of the province, and the two- letter country.

Enablement USB Debugging in Samsung Galaxy S4

2013-12-07T11:18:00.000-03:00

For to realize the enablement usb debugging in samsung galaxy S4, we must first install the device drivers, then we must make the qualification of developer.

The drivers can be downloaded from this link

http://www.samsung.com/us/support/owners/product/SGH-I747MBBATT

As do the habiltarcion developer? for in this way:

1 - Select Apps
2 - Go to Settings
3 - Select More -> About Device
4 - 7 times on Tap Build Number
5 - Select More -> Developer options
6 - Check USB debugging
7 - Select OK to allow USB debugging
8 - Check USB debugging

This video will be able to see it clearly.

www.systemdeveloper.info

Signing Soap Message with X509 Certificate

2013-11-13T09:40:00.001-03:00

Signing Soap Message with X509 Certificate

Digitally Sign from C# - SOAP Message

In this example we will see how we recover a certificate from a location on disk, add the certificate to the certificate store, open the certificate store, we take the certificate and sign the soap message.

For this we use Microsoft.Web.Services2.

Below an example:

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Security.Cryptography.X509Certificates;

namespace proxy
{
    public class DigitalSignature
    {
        public static getDataResponse queryingData(string name)
        {
            proxy.BanWS conexion = new proxy.Banws();

            //VALIDATION OF CONNECTION V3
            X509Certificate2 elCert = new X509Certificate2(@"C:\portecle-1.5\12345.P12", "12345");
            conexion.ClientCertificates.Add(elCert);

            // Copy the certificate to the certificate store using ASPNET
            // spent the path and password
            X509Certificate2 certificate = new X509Certificate2(@"C:\portecle-1.5\12345.P12", "12345");
            X509Store stores = new X509Store(StoreName.My, StoreLocation.CurrentUser);
            stores.Open(OpenFlags.ReadWrite);
            stores.Add(certificate);
            stores.Close();

            String sto = X509CertificateStore.MyStore;
            // Open the Certificates Stores
            X509CertificateStore store = X509CertificateStore.CurrentUserStore(sto);
            store.OpenRead();

            // We look for the certificate that we will use to perform the signature
            String certname = "conticert";
            
            Microsoft.Web.Services2.Security.X509.X509CertificateCollection certcoll = store.FindCertificateBySubjectString(certname);

            if (certcoll.Count != 0)
            {
                Microsoft.Web.Services2.Security.X509.X509Certificate cert = certcoll[0];

                SoapContext ctx = conexion.RequestSoapContext;
                SecurityToken tok = new X509SecurityToken(cert);
                ctx.Security.Timestamp.TtlInSeconds = 120;
                ctx.Security.Tokens.Add(tok);
                // We signed the request
                ctx.Security.Elements.Add(new MessageSignature(tok));
            }

            //remote call
            getDataResponse response = new getDataResponse();
            
            response = conexion.getData(name);
            
            return response;
        }
    }
}

Trace SOAP Request/Response XML With TraceExtension - SoapExtension - C#

Decrypt Files Encrypted With GnuPG FROM C#

Trace SOAP Request/Response XML with TraceExtension - SoapExtension - C#

2013-11-11T15:15:00.001-03:00

Trace SOAP Request/Response XML with TraceExtension - SoapExtension - C#

In one of my projects, I had to interact with a Web Service (Java) from another NET Web Service (asmx). logs to leave messages back and forth, I had to resort to SoapExtension.
Sometimes we need to send a sample of our request SOAP / XML web service response. I leave you a practical example without much return, I hope will be helpful

Class TraceExtension

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web.Services.Protocols;
using System.IO;
using System.Xml;

namespace TestProject
{
    class TraceExtension : SoapExtension
    {
        private Stream oldStream;
        private Stream newStream;

        private static XmlDocument xmlRequest;
        /// <summary>
        /// Gets the outgoing XML request sent to PayPal
        /// </summary>
        public static XmlDocument XmlRequest
        {
            get { return xmlRequest; }
        }

        private static XmlDocument xmlResponse;
        /// <summary>
        /// Gets the incoming XML response sent from PayPal
        /// </summary>
        public static XmlDocument XmlResponse
        {
            get { return xmlResponse; }
        }

        /// <summary>
        /// Save the Stream representing the SOAP request
        /// or SOAP response into a local memory buffer. 
        /// </summary>
        /// <param name="stream">
        /// <returns></returns>
        public override Stream ChainStream(Stream stream)
        {
            oldStream = stream;
            newStream = new MemoryStream();
            return newStream;
        }

        /// <summary>
        /// If the SoapMessageStage is such that the SoapRequest or
        /// SoapResponse is still in the SOAP format to be sent or received,
        /// save it to the xmlRequest or xmlResponse property.
        /// </summary>
        /// <param name="message">
        public override void ProcessMessage(SoapMessage message)
        {
            switch (message.Stage)
            {
                case SoapMessageStage.BeforeSerialize:
                    break;
                case SoapMessageStage.AfterSerialize:
                    xmlRequest = GetSoapEnvelope(newStream);
                    CopyStream(newStream, oldStream);
                    break;
                case SoapMessageStage.BeforeDeserialize:
                    CopyStream(oldStream, newStream);
                    xmlResponse = GetSoapEnvelope(newStream);
                    break;
                case SoapMessageStage.AfterDeserialize:
                    break;
            }
        }

        /// <summary>
        /// Returns the XML representation of the Soap Envelope in the supplied stream.
        /// Resets the position of stream to zero.
        /// </summary>
        /// <param name="stream">
        /// <returns></returns>
        private XmlDocument GetSoapEnvelope(Stream stream)
        {
            XmlDocument xml = new XmlDocument();
            stream.Position = 0;
            StreamReader reader = new StreamReader(stream);
            xml.LoadXml(reader.ReadToEnd());
            stream.Position = 0;
            return xml;
        }

        /// <summary>
        /// Copies a stream.
        /// </summary>
        /// <param name="from">
        /// <param name="to">
        private void CopyStream(Stream from, Stream to)
        {
            TextReader reader = new StreamReader(from);
            TextWriter writer = new StreamWriter(to);
            writer.WriteLine(reader.ReadToEnd());
            writer.Flush();
        }
        #region NoOp
        /// <summary>
        /// Included only because it must be implemented.
        /// </summary>
        /// <param name="methodInfo">
        /// <param name="attribute">
        /// <returns></returns>
        public override object GetInitializer(LogicalMethodInfo methodInfo,
            SoapExtensionAttribute attribute)
        {
            return null;
        }

        /// <summary>
        /// Included only because it must be implemented.
        /// </summary>
        /// <param name="WebServiceType">
        /// <returns></returns>
        public override object GetInitializer(Type WebServiceType)
        {
            return null;
        }

        /// <summary>
        /// Included only because it must be implemented.
        /// </summary>
        /// <param name="initializer">
        public override void Initialize(object initializer)
        {
        }
        #endregion NoOp
    }
}

Method soapMessageRecord

private void soapMessageRecord(string nombreMetodo)
        {
            StreamWriter escritorReq = File.CreateText("C:\\logs\\request_" + nombreMetodo+ "_" + DateTime.Now.Ticks + ".xml");
            StreamWriter escritorRes = File.CreateText("C:\\logs\\response_" + nombreMetodo+ "_" + DateTime.Now.Ticks + ".xml");


            // Object is accessed "XMLRequest" TraceExtension class and call property "OuterXml".
            string soapRequest = TraceExtension.XmlRequest.OuterXml;
            string soapResponse = TraceExtension.XmlResponse.OuterXml;

            escritorReq.Write(soapRequest);
            escritorReq.Close();
            //Access to the object "XmlResponse" TraceExtension class and called his property "OuterXml".
            escritorRes.Write(soapResponse);
            escritorRes.Close();
        }

Mode of use; Example

private void getStudentData(int identification)
        {
            PJWS.proxy2013 ws = new PJWS.proxy2013();
            PJWS.getStudentDataResponse data = new PJWS.getStudentDataResponse();

            data = ws.getData(identification);

            //call the above method most suitable
            soapMessageRecord("getStudentData");

            // or simply gain access in this way.
            var soapRequest = TraceExtension.XmlRequest.OuterXml;

            // or simply gain access in this way
            var soapResponse = TraceExtension.XmlResponse.OuterXml;
        }

In the web.config must add the following lines:

    <system.web>
      <compilation debug="true" targetFramework="4.0" />
      <webServices>
        <soapExtensionTypes>
          <add type="TestProject.TraceExtension, TestProject" priority="1" group="0" />
        </soapExtensionTypes>
      </webServices>
    </system.web>

See Also:

Decrypt Files Encrypted With GnuPG FROM C#

Force downloading a file from C #

www.systemdeveloper.info

Decrypt files encrypted with GnuPG FROM C#

2013-11-07T13:06:00.002-03:00

Decrypt files encrypted with GnuPG FROM C#

During these last days I saw the need to encrypt files with GnuPG program at the same time I had to be able to decode the same file

have a C #.

GnuPG To decrypt an encrypted file without using a DLL, use the Process class

I leave the method I have used for this purpose, hope it helps.

In the web.config we need to add the following key:

<add key="passphrase" value="1324356asdf"/>

<add key="WorkingDirectory" value="C:\Program Files\GNU\GnuPG"/>

public static string DecryptFile(string encryptedFilePath)
{

     FileInfo info = new FileInfo(encryptedFilePath);

     string decryptedFileName = info.FullName.Substring(0, info.FullName.LastIndexOf('.')) + "Dec.TXT";

     string encryptedFileName = info.FullName;

     string password = System.Configuration.ConfigurationManager.AppSettings["passphrase"].ToString();         

     System.Diagnostics.ProcessStartInfo psi = new System.Diagnostics.ProcessStartInfo("cmd.exe");           

     psi.CreateNoWindow = true;

     psi.UseShellExecute = false;

     psi.RedirectStandardInput = true;

     psi.RedirectStandardOutput = true;

     psi.RedirectStandardError = true;

     psi.WorkingDirectory = @System.Configuration.ConfigurationManager.AppSettings["WorkingDirectory"].ToString();

     System.Diagnostics.Process process = System.Diagnostics.Process.Start(psi);

     string sCommandLine = @"echo " + password + "|gpg.exe --passphrase-fd 0 --batch --verbose --yes --output " + decryptedFileName + @" --decrypt """ + encryptedFileName;

     process.StandardInput.WriteLine(sCommandLine);

     process.StandardInput.Flush();

     process.StandardInput.Close();

     process.WaitForExit();

     //string result = process.StandardOutput.ReadToEnd();

     //string error = process.StandardError.ReadToEnd();

     process.Close();

     return decryptedFileName;

}

See also

Signing Soap Message With X509 Certificate

Generate A New Key Pair - GnuPG

GnuPG

Generación de Claves, Encriptacion y Desencriptacion con GnuPG

2013-11-05T15:52:00.000-03:00

Generación de Claves, Encriptacion y Desencriptacion con GnuPG
1- Instalar el programa gnupg

2- Verificamos si existe algún par de claves en el repositorio de claves

c:\>gpg --list-key
gpg: comprobando base de datos de congianza
gpg: no se encuentran claves absolutamente fiables

3- Generamos el par de claves para poder, una publica y una privada

gpg (GnuPG) 2.0.22; Copyright (C) 2008 Free Software Foundation, Inc.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Por favor seleccione tipo de clave deseado:
(1) RSA y RSA (predeterminado)
(2) DSA y Elgamal
(3) DSA (sólo firmar)
(4) RSA (sólo firmar)
¿Su selección?: 1
las claves RSA pueden tener entre 1024 y 4096 bits de longitud.
¿De qué tamaño quiere la clave? (2048)
El tamaño requerido es de 2048 bits
Por favor, especifique el período de validez de la clave.
0 = la clave nunca caduca
= la clave caduca en n días
w = la clave caduca en n semanas
m = la clave caduca en n meses
y = la clave caduca en n años
¿Validez de la clave (0)?
La clave nunca caduca
¿Es correcto? (s/n) s

GnuPG deve construir un ID de usuario para identificar su clave

Nombre y apellidos: Juan Perez
Dirección de correo electrónico: juanperez@gmail.de
Comentario: Test
Ha seleccionado este ID de usuario:
"Juan Perez (Test) <juanperez@gmail.de>"

¿Cambia (N)ombre, (C)omentario, (D)irección o (V)ale/(S)alir? V
Necesita una frase contraseña para proteger su clave secreta.

gpg: el agente gpg no esta disponible en esta sesión
No ha especificado contraseña. Esto es probablemente una *mala* idea.
Si más tarde quiere añadir una, puede hacerlo usando este programa con
la opción "--edit-key".

Es necesario generar muchos bytes aleatorios. Es una buena idea realizar
alguna otra tarea (trabajar en otra ventana/consola, mover el ratón, usar
la red y los discos) durante la generación de números primos. Esto da al
generador de números aleatorios mayor oportunidad de recoger suficiente
entropía.

gpg: clave 71DB0252 marcada como de confianza absoluta
claves pública y secreta creadas y firmadas.

gpg: comprobando base de datos de confianza
gpg: 3 dudosa(s) necesarias, 1 completa(s) necesarias,
modelo de confianza PGP
gpg: nivel: 0 validez: 5 firmada: 0 confianza: 0-, 0q, 0n, 0m, 0f, 5u
pub 2048R/71DB0252 2013-11-05
Huella de clave = FBFC E95C 6CB4 5117 A8F3 C136 E0AF 49F2 71DB 0252
uid Juan Perez (Test) <juanperez@gmail.de>
sub 2048R/8C9B6A13 2013-11-05

4- Exportamos la clave publica para pasar a nuestra persona de confinanza

gpg --export --armor > c:\PrivateKey.txt

5- Pasamos a la persona de confianza la clave publica exportada, la persona de confianza debera importa la clave publica

6- La persona de confianza debera repetir los pasos 1, 2 y 3. antes de realizar la importacion

7- La importacion se realiza de la siguiente manera

gpg --import c:\PrivateKey.txt
gpg: clave 71DB0252: clave publica "Juan Perez (Test) <juanperez@gmail.de>"
importada
gpg: Cantidad total procesada: 1
importadas: 1 (RSA: 1)

8- Se procede a firmar la clave importada para poder utilizar la clave privada

gpg --sing-key juanperez@gmail.de

9- Una vez firmado, procedemos a encriptar el documento que desemmos proteger, este procedimiento nos generara un archivo con extencion .asc

gpg -sear juanperez@gmail.de test2.txt

10- Ya tenemos el archivo encriptado, ahora lo enviamos a la persona que genero la clave publica para que lo pueda desencriptar

gpg --output Test3.txt -d test2.txt.asc

11- Con esto cerramos un circuito completo de generación de claves, encriptacion y desencriptacion de documentos con GnuPG

Ver También

GnuPG

www.systemdeveloper.info

Generate a new key pair - GnuPG

2013-11-04T21:05:00.000-03:00

Generate a new key pair - GnuPG

The option of the command line - gen -key is used to generate a new primary key pair .

gpg - gen-key

gpg (GnuPG ) 0.9.8 , Copyright ( C ) 1999 Free Software Foundation, Inc.

This program Comes With ABSOLUTELY NO WARRANTY .

This is free software , and you are welcome to redistribute it

under Un certain conditions. See the file COPYING for details .

Please select what kind of key you want :

( 1) DSA and ElGamal (default )

(2) DSA ( sign only)

(4 ) ElGamal ( sign and encrypt )

Your selection ?

GnuPG is able to create several different types of key pairs , but there must be a primary key can generate signatures. Therefore, there are only three options. Option 1 generates two key pairs . A DSA key pair that is the primary key pair to be used only for signing.

Option 2 generates a DSA key pair . Option 4 [2 ] creates a single ElGamal keypair that will be used for both signing and encryption. In all cases it is possible to add additional subkeys for encryption and signing .

The DSA key size must be between 512 and 1024 bits, and an ElGamal key may be any size . GnuPG requires that keys be no smaller than 768 bits. Therefore, if you chose option 1 and also a larger key size of 1024 bits, the ElGamal key will have the desired size but the DSA is limited to 1024 bits.

DSA keypair will have 1024 bits.

About to generate a new ELG -E keypair .

keysize minimum is 768 bits

default keysize is 1024 bits

Suggested highest keysize is 2048 bits

What keysize do you want ? (1024)

The longer the key , the more secure against attacks by "brute force" , but otherwise the key size given by definition is appropriate, as it would be cheaper to circumvent the encryption try to break in strength. Also, encryption and decryption will be slower as you increase the size of the key, and a key size larger could affect the length of the digital signature. Once selected, the key size can not be changed ever.

Finally , we must choose a date. If you chose option 1 above , the expiration date will be used for two separate key pairs , ElGamal and DSA .

Requested keysize is 1024 bits

Please specify how long the key Should be valid .

0 = key does not expire

<n> = key expires in n days

<n> w = key expires in n weeks

<n> m = key expires in n months

<n> y = key expires in n years

Key is valid for ? (0)

Key does not expire at all

Is this correct (y / n ) ?

For most users , a key without expiration date is appropriate. However, if you choose with an expiration date , the time for it must be chosen carefully, because although you can change the expiration date subsequent to the generation of the key , it can be difficult to communicate a change to those users who possess this public key .

You need a User -ID to identify identity your key , the software constructs the user id

from Real Name , Comment and Email Address In this form:

" Heinrich Heine ( Der Dichter ) <heinrichh@duesseldorf.de> "

Real name:

Email Address:

comment:

Only create a user ID to generate a key , but you can create additional identifiers if you want to use the key in two or more settings , eg, if used by a party in the office as an employee and partly at home and political activist . Be careful when creating a user ID , because after this can not be edited to make changes.

Although special characters in iso -8859 -1 are accepted , GnuPG us know if we use them to fill in fields [3 ] . For example, if rellenáramos fields with the following data ,

Real name: Angelo

Email address : angelo@systemdeveloper.info

Comment: Testing key pair

We would see the following: " Angelo ( test key pair ) <angelo@systemdeveloper.info> " . Therefore it is best to avoid these characters.

You are using the ` iso -8859-1 'character set.

You selected this User -ID:

" Angelo ( test key pair ) <angelo@systemdeveloper.info> "

Change ( N ) ame , ( C ) omment , (E ) mail or ( O) kay / ( Q ) uit ?

Still, depending on the version you are using, to list the key you will see a series of strange characters instead of accented vowels , ñ, ç , etc ...

GnuPG needs a password to protect the private keys , primary and secondary , having the user[4].

You need a Passphrase to protect your private key .

Enter passphrase :

There is no limit to the length of a password, and it must be chosen with care. From a security standpoint , the password to unlock the private key is one of the weakest points in GnuPG ( and other systems of public-key encryption ) , as it is the only protection for the user if someone from taking your private key. For an ideally password unused words in a dictionary , and to mix uppercase and lowercase letters, digits, and other characters. A good password is crucial to the safe use of GnuPG .

Repeat passphrase:

As before with the fields of user identification, passwords accept special characters iso -8859 -1. However, keep in mind that if we ever had to use our password from a machine with a keyboard different from ours, we would be unable to unless we change the system configuration .

Generate a revocation certificate

After you have generated a key pair , you must, immediately generate a revocation certificate for the primary public key using the - gen -revoke . If you forget your password or if your private key is compromised or lost , this revocation certificate may be published to notify others that the public key should not be used anymore. A revoked public key can be used to verify signatures made by the user in the past but can not be used to encrypt data. This does not affect the ability to decrypt messages that have been encrypted with the key before its revocation , provided that the user still has access to the private key .

gpg - output D58711B7.asc - gen -revoke 0xD58711B7

1999-09-24 Angelo 1024D/D58711B7 sec ( test key pair ) <angelo@systemdeveloper.info>

The argument mykey must be a key specifier , be it the key identifier ("key ID" ) of the user's primary pair , or whether any other part of a user ID ( "User ID" ) that identifies the pair the said user key . The generated certificate will be in the file revoke.asc . If you omit the - output, the result will be placed on standard output . Since the certificate is short , you may wish to print a paper copy of the certificate to store somewhere safe, such as a safety deposit box . The certificate should not be stored in places where others can access , since anyone can publish the revocation certificate and disable the corresponding public key .

See also

Decrypt Files Encrypted With GnuPG FROM C#

Signing Soap Message With X509 Certificate

GnuPG

www.systemdeveloper.info

Oracle TNSNAMES.ORA Network Configuration

2013-10-30T16:31:00.001-03:00

Oracle TNSNAMES.ORA Network Configuration

Well ... to start I give greetings to all ... I'm going to explain below is nothing new but I hope that will be helpful to whoever finds here ..

Enough blah blah and let us ...

There are several configuration files Oracle network , varying the type of network configuration that is modified use one or the other files ..

I will declare the most typical case ... if we want to be able to connect to the database through the PL / SQL Developer or Oracle SQL DEVELOPER the only file you have to modify is the TNSNAMES ...

As we modify it ? very easy ... open it with any text editor (by the way I recommend notepad + + ) , and what you find will be something like this :

# E: \ V8I \ NETWORK \ ADMIN \ TNSNAMES.ORA Configuration File: E: \ v8i \ network \ admin \ tnsnames.ora

# Generated by Oracle Net8 Assistant

V8I.WORLD =

( DESCRIPTION =

( ADDRESS_LIST =

(ADDRESS = ( PROTOCOL = TCP ) (HOST = CLASSROOM_SERVER ) (PORT = 1521 ) )

)

( CONNECT_DATA =

( SERVICE_NAME = V8I.WORLD )

)

REPSERVER1 , REPSERVER1.world = (ADDRESS = ( PROTOCOL = tcp) (HOST = CLASSROOM_SERVER ) (PORT = 1949 ) )

These are the parameters received :

HOST : IP address of the server you want to connect

PORT: Port of the database listener

SERVICE_NAME : name service database to which you want to connect

DESCRIPTION OF CONNECTION : connection description ( in this case is V8I.WORLD )

What we will do is add a new configuration block leaving intact the former , would be more or less as follows:

# E: \ V8I \ NETWORK \ ADMIN \ TNSNAMES.ORA Configuration File: E: \ v8i \ network \ admin \ tnsnames.ora

# Generated by Oracle Net8 Assistant

V8I.WORLD =

( DESCRIPTION =

( ADDRESS_LIST =

(ADDRESS = ( PROTOCOL = TCP ) (HOST = CLASSROOM_SERVER ) (PORT = 1521 ) )

)

( CONNECT_DATA =

( SERVICE_NAME = V8I.WORLD )

)

MiConexion =

( DESCRIPTION =

( ADDRESS_LIST =

(ADDRESS = ( PROTOCOL = TCP ) (HOST = xxx.xxx.xxx.xxx ) (PORT = 1521 ) )

)

( CONNECT_DATA =

( SERVICE_NAME = MiConexion )

)

REPSERVER1 , REPSERVER1.world = (ADDRESS = ( PROTOCOL = tcp) (HOST = CLASSROOM_SERVER ) (PORT = 1949 ) )

In this case the CONNECT DESCRIPTOR is MiConexion .

Once done nothing more remains for us to test our connection settings ... we can do it using the command TNSPING or trying to make a connection from the PL / SQL or SQL DEVELOPER to the database ...

I hope it was useful ... = )

See Also:

Methods connection to Oracle Database with C# .NET

Xamarin

2013-10-25T09:59:00.002-03:00

Mobile Programming. XAMARIN

It is well known the story of the decline of Flash: how Steve Jobs gave a terrible blow and how Adobe and HTML5 did the rest, leaving orphan to one of the most active and creative Internet has had. After Adobe communicate its plans with respect to the platform Flash programmers have finished redirecting his career into other courses.
Much has been and continues to HTML5 websites but not enjoy both of language. Others have tried to continue using Actionscript and Flash Builder but based on Stage3D, starling, Feathers UI to break into the world of apps and games. In my case, I have a bigger jump and although I remain a developer platform, I changed my language to C # and I started to program using Xamarin, a development environment for mobile applications.

Why Xamarin ?

These are my reasons for choosing Xamarin:
It is cross platform but with a different philosophy from what we've seen before: Xamarin try to share the application logic across all platforms using the same language C #, but the implementation of the user interface is done with native APIs specific to each platform. This means that only 60-70 % of the code is shared (making a good design ) between each version, but on the other hand, the implementation ends up being much more robust and native performance.
xamarin_graph
Xamarin layers
Clearly I have not program in Javascript. I like high-level languages and Xamarin uses C # 5.0 , as well as most of. Net Framework 4.5, with all that that means: codes, examples, libraries.

You can quite easily reuse code written in the native language of each platform.
The Xamarin Studio is an IDE based on Monodevelop that goes beyond the basic requirements: code completion, version system, native simulators, storyboards and other facilities. It is not yet fully mature but has a good future.
Xamarin is a start- up led by Miguel de Icaza , creator and promoter and Mono platform for Linux Gnome environment. Personally, I think a person with great vision and brilliant programmer.

Cons:

Not everything is rosy with Xamarin, its price is quite high in comparison with other alternatives, but for a indie developer, in my opinion, not so much. Moreover, the way the platform is focused forces develop applications similar to a native programmer. This results in there to know how it works or how to interact with XCode an Activity in Android, and know something of Objective C and Java to read and use examples.

www.systemdeveloper.info