ASP.net day

Cut Is Faster Than Copy Paste

revenmerchant.business.nospam@nospam.revenmerchantservices.com (satalaj) — Mon, 20 Feb 2012 11:46:14 -0700

Have you seen time required to Cut and Paste the file on same drive location? Yes, Cut and Paste the file on same drive location is faster. Let’s see why?

When you add new file or folder to C:\ Drive, the operating system adds it’s location entry in FAT known as File Allocation Table. Your actual file or folder is kept at empty space on the disk. It’s something like index of the book.

If you want to move the file within same root C:\ drive, operating system only update the FAT of the drive. The actual location of file or folder never get changed. Only index of it get changed at the time of cut and paste within the same drive.

You may want to move the file from location C: drive to location D: drive. In such a scenario, the content of file or folder gets copied to new location and old entry of file on C: drive FAT gets removed.

Even if you have moved the file from C: to D: drive, the actual file content still exists on C: drive. Only FAT entry is removed.

This is how file recovery software can recover the deleted file. First file recovery program looks for the content of files. If there is missing entry of the file on FAT, it ask the user to name the file.

ms sql newid function

revenmerchant.business.nospam@nospam.revenmerchantservices.com (Satalaj) — Mon, 20 Feb 2012 11:00:00 -0700

It also can be used to select random rows from specified tables like this

select top 10 from xyz

order by newID()

Above query will always return random top 10 rows from xyz table.

In asp.net, you can pass variable of type GUID to ms sql table field of type uniqueidentifier.

how to open a blog website

revenmerchant.business.nospam@nospam.revenmerchantservices.com (Satalaj) — Mon, 20 Feb 2012 10:38:00 -0700

Many people are interested to open their own blog website. There are many ways to open blog like website.
I will show you very simple to quite difficult ways to open your own blog website.
Note: Creating your own blog website doesn’t required you to be a technical person.

Open Blog account using Google account

Google account can be used to login at below URL. Free blog accounts.

Blogger: Create your free Blog

Login to blogger website. It provides web interface to let you create new blog.
Click on button. Create a new blog pop-in will appear on screen.

Title Enter the name of your blog ex. “your name’s blog. ”.
Blog Address: This is the web address of your blog. Suppose you entered “Satalaj”,
then your blog address would be http://satalaj.blogspot.com
The name and address of blog should be relative to your AIM of blog.
Choose the blog Templates. There are number of available blog templates. Even you can create your
own blog template using little knowledge of HTML or you can download and modify the existing blog
templates.
Click on Create blog button. Now, you have successfully created the first blog.

Blog Post You are ready to post on your blog. As shown in above figure I have created Digital web log.
http://digital-web-log.blogspot.com is the web address of my blog.
Click on Start posting or Start blogging by selecting blog from blog list.
Add post title or page title of your blog. In compose area write your actual content.
Click on Publish button and watch your live blog by opening blog address in new window of browser.
in my case it is http://digital-web-log.blogspot.com
You can also edit, view or Delete the blog post.
Click on add new post to existing blog or create new blog.
It is advisable to create only one blog as it is easier to manage and maintain.
You can crate as many as blog you want.
Create categories and publish appropriate post to the categories.
Add Keywords and descriptions inside the blog post for SEO(Search engine optimization) optimization.

Word press blog

It is very popular and one of the best blogging portal. You need to create new account at http://wordpress.com/

Blog with your own domain name.

Hosting provider Purchase space and domain name from www.godaddy.com a hosting provider. They will
give you space and domain around $4 per month or less than that. There are many hosting services available in
the market. You can choose the one which suites the requirement.

You can download the free www.wordpress.org or http://www.dotnetblogengine.net/ website and install it on
your website.

Note: To be a successful blogger don’t copy paste the efforts of other authors. If you do that, your quality of
blog posts get degraded. Always post original content.

Side by side you can train your self about HTML, CSS and JavaScript.

W3Schools Online Web Tutorials

Make sure that the blog post contains minimum 500 words. Try to add videos and images in the post.

How to monitor visitors to my web site or blog

I have already posted the how is it is to monitor visitors to your site offline and real time.
You can refer below URL for more details.

Deep dive inside Google analytics How to use Google analytics
Live traffic monitoring live web traffic

How to generate traffic on blog or website

First get enough confidence that you are getting visitors and you can post the best on your blog.
Create Site map of the blog and submit it to major search engines.
You can use webmaster tools and

The next post will show you how to earn money while blogging.

Connect Tv To Internet

revenmerchant.business.nospam@nospam.revenmerchantservices.com (Satalaj) — Mon, 20 Feb 2012 10:36:00 -0700

In this post we will see how to connect internet directly to Internet ready TV.
I have tested it using D-Link wireless modem and Sony Bravia.

First make sure that you have configured your credentials given by ISP to ADSL modem.
Get long LAN cable up to 1-2 meter from computer hardware shop. Plug the one end at D-Link modem
and other at TV set back panel. You can see it in above video.
You can even browse the internet and watch videos published on www.tv.com or www.hulu.com

www.hulu.com

www.fox.com

www.nbc.com

The speed of internet may affect your online watching movie experience. You should have minimum
100-200+ Kbps broadband internet speed.

You can attach Wi-Fi device to TV and setup your wi-fi network and enjoy browsing the internet on Big HDTV screen.
Also, you can setup live conference or you can connect to Skype, Gmail etc.

Asp.net How to display HTML contents

revenmerchant.business.nospam@nospam.revenmerchantservices.com (satalaj) — Sun, 19 Feb 2012 12:10:39 -0700

Do you want to show HTML source content on page? It's simple with HttpUtility.HtmlEncode method. Here we will see both C#.net and VB.net examples of encoding HTML content for display.

Asp.net Html Encode.

Let's see Asp.net C# HTML encode example.

protected void Page_Load(object sender, EventArgs e)
  {
    string htmlContent = "<b>This is bold string.</b><I>This is itallic string.</I>";
    
    string htmlOutput =  HttpUtility.HtmlEncode(htmlContent);
    
    Response.Write("Html Content are: "+ htmlContent);
    Response.Write("</br>");
    Response.Write("Html Source Content are: " + htmlOutput);
  }

VB.net Html Encode.

Protected Sub Page_Load(sender As Object, e As EventArgs)
    Dim htmlContent As String = "<b>This is bold string.</b><I>This is itallic string.</I>"

    Dim htmlOutput As String = HttpUtility.HtmlEncode(htmlContent)

    Response.Write("Html Content are: " + htmlContent)
    Response.Write("</br>")
    Response.Write("Html Source Content are: " + htmlOutput)
End Sub

This is very simple way of rendering the HTML content over browser. If html content are not encoded, browser display it as HTML.

Linq Array Order-By

revenmerchant.business.nospam@nospam.revenmerchantservices.com (satalaj) — Sat, 18 Feb 2012 05:05:21 -0700

Here is very simple example of ordering an array of string using Linq expression. We will sort array of string.

C# Linq sort array ascending.

string[] arrOfStrings = new string[]
	{
	    "Linq",
	    "WCF",
	    "WPF",
	    "SilverLight",
	    ".Net",
		"IIS7",
		"HTML5",
		"Android"
	};
	// Linq expression to sort an array of strings.
	var sortResults = from s in arrOfStrings
		   orderby s
		   select s;

	foreach (string str in sortResults)
	{
	    Console.WriteLine(str);
	}

Output .Net Android HTML5 IIS7 Linq SilverLight WCF WPF

Above example uses LINQ expression as:

var sortResults = from s in arrOfStrings
		   orderby s
		   select s;

The default order by clause does sorting in ascending order.

Linq Sort order by descending.

Let’s sort an array of string in descending order. It will reverse the array output in result.

string[] arrOfStrings = new string[]
	{
	    "Linq",
	    "WCF",
	    "WPF",
	    "SilverLight",
	    ".Net",
		"IIS7",
		"HTML5",
		"Android"
	};
	
	var sortResults = from str in arrOfStrings
		   orderby str descending
		   select str;

	foreach (string str in sortResults)
	{
	    Console.WriteLine(str);
	}

Output :WPF WCF SilverLight Linq IIS7 HTML5 Android .Net

Asp.net How To Expire a Cookie

revenmerchant.business.nospam@nospam.revenmerchantservices.com (satalaj) — Sat, 18 Feb 2012 01:47:45 -0700

You want to set expiry date of cookie. Here are asp.net C# and Vb.net code samples.

Asp.net C# Set Cookie expires.

protected void Page_Load(object sender, EventArgs e)
  {

    HttpCookie UserNameCookie = new HttpCookie("UserName");
    UserNameCookie.Value = "Satalaj";
    UserNameCookie.Expires.AddDays(1);

    Response.Cookies.Add(UserNameCookie);

  }

The cookie created in above example will expire in 1 day. You can also add TimeSpan, which will help you to expire the cookie in a minute or second.

Asp.net VB.net cookie expiry.

Protected Sub Page_Load(sender As Object, e As EventArgs)

    Dim UserNameCookie As New HttpCookie("UserName")
    UserNameCookie.Value = "Satalaj"
    UserNameCookie.Expires.AddDays(1)

    Response.Cookies.Add(UserNameCookie)

End Sub

Asp.net page specific cookie

revenmerchant.business.nospam@nospam.revenmerchantservices.com (satalaj) — Sat, 18 Feb 2012 01:24:23 -0700

You want to set values in cookie, which is valid for page path "/mysubdirectory". Here is example in Asp.net to set page path specific cookie.

Asp.net C# cookie path example.

protected void Page_Load(object sender, EventArgs e)
  {

    HttpCookie UserNameCookie = new HttpCookie("UserName");
    UserNameCookie.Value = "Satalaj";
    UserNameCookie.Path = "/web.Demo";

    Response.Cookies.Add(UserNameCookie);

  }
  protected void Button1_Click(object sender, EventArgs e)
  {
    string username = Request.Cookies["UserName"].Value;

    Response.Write("Retrived user name from cookie is: " + username);
  }

Asp.net VB.net Cookie path Example.


Protected Sub Page_Load(sender As Object, e As EventArgs)

    Dim UserNameCookie As New HttpCookie("UserName")
    UserNameCookie.Value = "Satalaj"
    UserNameCookie.Path = "/web.Demo"

    Response.Cookies.Add(UserNameCookie)

End Sub
Protected Sub Button1_Click(sender As Object, e As EventArgs)
    Dim username As String = Request.Cookies("UserName").Value

    Response.Write("Retrived user name from cookie is: " + username)
End Sub

What you need to do is, just set path of instance of Http Cookie.

Asp.net How To Write a Cookie and Read

revenmerchant.business.nospam@nospam.revenmerchantservices.com (satalaj) — Sat, 18 Feb 2012 01:15:54 -0700

You can store user specific data at client side using cookies. Here we will see how to Read and write cookies in Asp.net. Do not store sensitive information like password or credit card numbers in cookies. You can store other information cookie like login user name, preferences, font size, user preferred themes etc.

You can maintain the data across the web pages using cookie at client side. When user requests the page, browser sends cookie information related to domain or page for that user.

Asp.net C# write cookie example.

Here we will create cookie named User using Asp.net C#. Http Cookie instance will be passed to response of web page. The instance UserNameCookie holds name and value pair, in our example we are setting name of cookie as “UserName” and Value as “Satalaj”.

C# Cookie example.

protected void Page_Load(object sender, EventArgs e)
  {

    HttpCookie UserNameCookie = new HttpCookie("UserName");
    UserNameCookie.Value = "Satalaj";

    Response.Cookies.Add(UserNameCookie);

  }

VB.net cookie example.

Protected Sub Page_Load(sender As Object, e As EventArgs)

    Dim UserNameCookie As New HttpCookie("UserName")
    UserNameCookie.Value = "Satalaj"

    Response.Cookies.Add(UserNameCookie)

End Sub

Asp.net Read Cookie Example.

To Read Cookie in Asp.net, access cookie information stored inside request. Let's see example.

C# Read Cookie.

protected void Button1_Click(object sender, EventArgs e)
{
  string username = Request.Cookies["UserName"].Value;

  Response.Write("Retrived user name from cookie is: " + username);
}

VB.net Read Cookie.

Protected Sub Page_Load(sender As Object, e As EventArgs)

    Dim UserNameCookie As New HttpCookie("UserName")
    UserNameCookie.Value = "Satalaj"

    Response.Cookies.Add(UserNameCookie)

End Sub

Summery: We have used instance of HttpCookie to read and write cookie. To write cookie we have added name and value of cookie to HttpCookie instance and passed to Response. To retrieve value from cookie, we used Request object.

Asp.net How To Remove Cookie

revenmerchant.business.nospam@nospam.revenmerchantservices.com (satalaj) — Sat, 18 Feb 2012 00:19:32 -0700

Do you want to remove or delete cookie using Asp.net? Here is a trick about how we can remove cookie from client. Cookies get stored at browser. You can’t delete them using Asp.net code. However the trick is, set expiration date before today’s date can tell browser to remove cookie. Let’s see example in Asp.net with C#.net and VB.net.

C#.net code to remove cookie.

1. First we need to detect whether cookie exists in request or not.

2. If cookie exists, set it’s expiration date to past.

3. Add new expiration date to cookie in response.

public partial class Demo : System.Web.UI.Page
{
  protected void Page_Load(object sender, EventArgs e)
  {
    if (Request.Cookies["username"] != null)
    {
      HttpCookie cookie = new HttpCookie("username");
      cookie.Expires = DateTime.Now.AddDays(-1);
      Response.Cookies.Add(cookie);
    }

  }
}

VB.net Remove Cookie.

In Asp.net with Vb.net you can remove cookie at client side by adding expiration date prior to today's date. As I have already mentioned, you can't delete the cookie directly. It's browser responsibility to delete cookie.

Public Partial Class Demo
    Inherits System.Web.UI.Page
    Protected Sub Page_Load(sender As Object, e As EventArgs)
        If Request.Cookies("username") IsNot Nothing Then
            Dim cookie As New HttpCookie("username")
            cookie.Expires = DateTime.Now.AddDays(-1)
            Response.Cookies.Add(cookie)
        End If

    End Sub
End Class

You can set cookies for domain or specific to page. To set page specific cookie, use Path properties of HttpCookie instance.