help for me

Custom View Engine in ASP.NET MVC 4

2013-10-15T15:45:00.000+06:00

Custom ViewEngine? Do we really need this? Generally not. But I needed this in a project. In the project I needed to override the ViewEngine.

The override ViewEnging looks like follows:

public class MyViewEngine : RazorViewEngine
    {
        public MyViewEngine()
        {
            ViewLocationFormats = new string[]{
                "/Views/Themes/{0}.cshtml",
                "/Views/{1}/{0}.cshtml"
            };
        }
    }

And then in the Application_Start of Global.asak, add the following

protected void Application_Start()
        {
            // ... other code

            ViewEngines.Engines.Clear();
            ViewEngines.Engines.Add(new MyViewEngine());

            // ... more code
        }

Email template background image in Outlook Client

2013-10-09T18:39:00.001+06:00

Working with email template is really painful. In the era of HTML5, CSS3 and Javascript, we still need to work in table design because of email clients. Here I am concentrating about the Outlook email client where the background image don't work traditional.

If we want to put a background image in a table row then we need to code as following

<tr class="back" style="height: 38px; background: url(imagepath) no-repeat;">
 
 <td width="70%" style="height: 38px; padding: 0 10px;">
  Cell text
 </td>
 
</tr>

URL routing in ASP.NET MVC

2013-09-16T15:42:00.001+06:00

In ASP.NET MVC, the routing is very easy. By examine the URL, its automatically find the controller and then actions.

But, to select a single controller for all kinds of URL, followings can help

           routes.MapRoute(
                "Single",
                "{page}",
                new { controller = "Single", action = "Single" }
            );
            routes.MapRoute(
                "SingleChild",
                "{page}/{child}/{*ignore}",
                new { controller = "Single", action = "Child" }
            );
            routes.MapRoute(
                null,
                "",
                defaults: new { controller = "Single", action = "Home" }
            );

Turning output caching off for authenticated users in ASP.NET MVC

2013-09-16T15:13:00.002+06:00

While working on ASP.NET MVC 4, I was badly needed to implement caching to speed up the page loading. Caching is very easy to use and also powerful in ASP.NET MVC. But I needed to turn off the caching for admin. Let me explain why I was needed it.

In our CMS, there is an option for the admin to edit the content inline directly in the main website. The admin don't need to go to dashboard and find the content for editing. When the admin will log-in in the website, they will get this options to edit the content. If I cache the website normally, then either admin will not see the option to edit the content or end user will see the option to edit it.

In ASP.NET MVC, it can be possible to show different cache to the end user and admin using VaryByCustom parameter. But this is not the solution. The admin will not see the immediate update that he just made. Therefore I need to turn off the caching for the authenticated users only.

In ASP.NET MVC, we used OutputCache attribute to do the caching easily. There are some properties by which you can customize the output cache. But these don't solve my problem.

To solve this I needed to create a new Cache class by extending the OutputCacheAttribute class and only override the OnResultExecuting method. OnResultExecuting method is called before the action result executes. In this methods I have checked that if aa user is authenticated then disable caching. Following is my code:

 public class MyCacheAttribute : OutputCacheAttribute
    {
        public override void OnResultExecuting(ResultExecutingContext filterContext)
        {
            var httpContext = filterContext.HttpContext;

            if (httpContext.User.Identity.IsAuthenticated)
            {
                // making cach location none means no cache
                base.Location = OutputCacheLocation.None;
            }
            else
            {
                // you can put your favorite cache location
                base.Location = OutputCacheLocation.Any;
            }

            httpContext.Response.Cache.AddValidationCallback(IgnoreAuthenticated, null);
            base.OnResultExecuting(filterContext);
        }

        private void IgnoreAuthenticated(HttpContext context, object data, ref HttpValidationStatus validationStatus)
        {
            if (context.User.Identity.IsAuthenticated)
                validationStatus = HttpValidationStatus.IgnoreThisRequest;
            else
                validationStatus = HttpValidationStatus.Valid;
        }
    }

Now to use the cache as follows

 public class PagesController 
{
      [MyCache(CacheProfile = "Cache_profile")]
      public ActionResult Index(){
           // the codes
           return View();
}

FQL: query user table by name

2013-04-18T12:28:00.001+06:00

I was trying to find Facebook user by querying by name in the user table. According to the Facebook documentation, the name field of user table is indexable. Therefore, logically it is possible to query by name.

But when I query user table by name field, it gives me the error with code 604.

The error message is "Your statement is not indexable. The WHERE clause must contain an indexable column. Such columns are marked with * in the tables linked from http://developers.facebook.com/docs/reference/fql "

The name field of user table is marked with * in the facebook documentation; https://developers.facebook.com/docs/reference/fql/user/.

----

I have googled about it and found the solution in stackoverflow. It says to run the query on profile table by name and get the id of the user. Then query the user table by the id.

SELECT uid FROM user WHERE uid IN (SELECT id FROM profile WHERE name="kamrul hassan")

Source: http://stackoverflow.com/questions/13793567/fql-filter-user-table-by-name

Wish this will help you.

Show "Post" count by searching in Wordpress

2013-03-25T14:38:00.001+06:00

Sometimes in Wordpress, we need to perform custom search in our blog or site. It is not difficult to perform custom search. When I wanted to show the number of post found after search, I got problem. After google about it, I found the following easy solution.

  echo wp_specialchars($s); // printing the keyword
  $allsearch = &new WP_Query("s=$s&showposts=-1");
  $count = $allsearch->post_count;
  echo ' (' . $count . ') '; // printing the founded post count
  wp_reset_query();

I wish this will help you.

Selecting multiple element from a List using Lambda Expression

2013-03-25T14:25:00.001+06:00

I was searching an easy way to select multiple entry form a List of objects using Lambda Expression by matching their IDs. It can be done easily using a loop but I don't wanna use a loop in my code just for this. Finally I found it and it is very easy.

Consider you have a List of objects where each object has an field called ID. You want to extracts 5 elements from that List by matching the ID. The size of the list maybe few thousand.

Just use for following code, and you are done

List someListOfIds = new List(700, 1234, 3412, 400, 10); mainlist.Where(x => someListOfIds.Contains(x.ID));

This technique helps us to find few date from the Database by avoiding complex nested query if you don't love writing those query :)

ASP.net redirect to another page

2010-07-15T20:07:00.001+06:00

One can use one of the following three commands to redirect in another page. On button click, this command can also be used.

Response.Redirect("Page1.aspx");

Server.Transfer("Page2.aspx");

Read and write NTFS from Mac OS X

2010-05-11T18:13:00.000+06:00

To perform read, write action of NTFS file system from Mac OS X (Snow Leopard), just install the following two software.

1. MacFUSE first. "MacFUSE allows you to extend Mac OS X's native file handling capabilities via 3rd-party file systems."
Download from: http://code.google.com/p/macfuse/

2. Secondly NTFS-3G. "NTFS-3G is an open source cross-platform implementation of the Microsoft Windows NTFS file system with read-write support. NTFS-3G often uses the FUSE file system interface, so it can run unmodified on many different operating systems".
Download link (Last accessed May 10, 2010)
Blog: http://macntfs-3g.blogspot.com/

Done. Now enjoy :)

Monty says: Help saving MySQL

2009-12-14T20:29:00.000+07:00

Read the following article and help....

Monty says: Help saving MySQL

Google Wave invitation

2009-11-30T12:06:00.000+07:00

I have 15 Google Wave invitation left. I will give first 15 person who will send comment of this post.

The Go Programming Language

2009-11-11T21:38:00.000+07:00

The Go Programming Language is new programming language developed by some Google engineer.

Is Google using Go internally?

"The Go project was conceived to make it easier to write the kind of servers and other software Google uses internally, but the implementation isn't quite mature enough yet for large-scale production use. While we continue development we are also doing experiments with the language as a candidate server environment. It's getting there. For instance, the server behind http://golang.org is a Go program; in fact it's just the godoc document server running in a production configuration."

Nice cons about Ubuntu 9.10

2009-10-30T23:14:00.001+07:00

ZDNet told some interesting but real cons about Ubuntu 9.10 in the comparison with Windows 7. To install Ubuntu 9.10, you need to find the installer CD which is not available like Windows 7. You need to download the ISO of Ubuntu then burn it to CD then install. But for Windows 7, just buy it and install it. So getting Ubuntu installer CD is a problem for the normal user. To install Windows 7, one may need to buy a new PC with good hardware but in case of Ubuntu 9.10, all hardwares in the market don't work perfectly coz the manufacturers don't provide the driver of their products.Everybody knows the problem of codecs and the proprietary DRM for the media formats which is a little bit problem for the normal user. You can read it from here ...

Google Transliteration

2009-10-29T10:19:00.001+07:00

Its very difficult to type complex script without the help of a software. We always use third party software to write complex script. But during travel and if we don't our netbook, the its impossible to write our language. Google India Labs developed a transliteration system. Its very easy to use it. You can write your language directly in the text box. Currently it is supported for Arabic, Bengali, Gujarati, Hindi, Kannada, Malayalam, Marathi, Nepali, Persian, Punjabi, Tamil, Telugu and Urdu. Go to http://code.google.com/p/t13n/ to know how to use it.

Python threading: An experience as newbie

2009-10-28T11:33:00.002+07:00

I was trying to use threading in my python program and as I am new in python I need to learn the Threading. I was googling for a quick example of python threading and I found the following program from here.

import threading
import datetime

class ThreadClass(threading.Thread):
    def run(self):
        now = datetime.datetime.now()
        print "%s says Hello World at time: %s" %(self.getName(), now)

for i in range(2):
    t = ThreadClass()
    t.start()

When I run it, its give the following error:

Traceback (most recent call last):
File "threading.py", line 1, in
import threading
File "/home/murtoza/pyro/threading.py", line 4, in
class ThreadClass(threading.Thread):
AttributeError: 'module' object has no attribute 'Thread'

I just copy the code from the net, and it should run perfectly but why its not running!!! Whats the problem in the code? I had no idea. I googled by the keyword “AttributeError: 'module' object has no attribute 'Thread'” and found this. Its the same error, same OS. And I got the solution in the second page.

What I did? I coped the code from net, made a file named threading.py and pasted the code. Then run it by $ python threading.py command. The compiler got confused. The first line of the code is import threading . Which treading file compiler should import. The file I made or the file system has? Both file's name is threading.py . The priority is the file I made, and there is no Thread inside my file. Actually this file is not a library. So I just rename my file as threadTest.py and its work perfectly.

Female uses Gmail more and male uses hotmail

2009-10-22T23:39:00.000+07:00

RapLeaf shows in a study that Gmail users are mostly female and Hotmail users are mostly male. RapLeaf also gave a statistics of users according to age; older people use AOL and younger uses Gmail. Read more...

Google Chrome Portable

2009-10-22T16:21:00.001+07:00

To download portable version of Google Chrome go to the following link:

http://portableapps.com/apps/internet/google_chrome_portable

Writing Unicode file in Python

2009-10-19T12:26:00.000+07:00

Just use the following code to write an Unicode text in a file by Python.

out = file("Unicode-File.txt", "w" )
out.write(codecs.BOM_UTF8)
s = "any Unicode text"
out.write( s.encode( "utf-8" ) )

Bold, italics, and strikethrough in Gmail chat

2009-10-17T12:02:00.000+07:00

Many of us don't know how to use bold, italics, and strike through in gmail chat but we use google talk every day. Its very easy to do it.

To bold a text, put the text between asterisks, e.g *bold*

To italics a text, put the text between underscores, e.g. _italics_

To strike through, put the text between hyphens, e.g. -strike through-

Google Docs previews in Gmail

2009-10-16T11:08:00.000+07:00

Its great coz now I can see Google documents, spreadsheets, or presentations right in my Gmail inbox. For this I needed to enable a new Gmail Labs feature, Google Docs previews, that is released today.

Its a great feature for those who use Google Doc and share with friends, office mate, and others. Why need this feature as we can see the document in the new tab by clicking the shared link? My question, why i need to open another tab to see whats inside the doc? As its a Google product, why i can't see inside the Gmail? Remember the lab user, when Gmail Lab team made a great lab feature to view the YouTube videos, Yelp reviews, and Picasa and Flickr albums inside the Gmail. It was a great feature for me also its help me to save my time. This feature will also save my time a lot.

For more information on Google Docs previews in Gmail, check the Gmail blog post .

Got the wrong Bob?

2009-10-14T14:24:00.000+07:00

Got the wrong Bob? is a new lab feature of Gmail. As gmail made us lazy, so we don't wanna type the full email address. We just type the first few char of the email address or the name. So there is a great chance of sending the email to a wrong person. I ever sent my mobile contact backup to a public group in place of my back email address. My colleague sent an informal email to our boss in place of me mistakenly coz the first two char of my name and my boss's name is same.

These things happen as we are becoming lazy coz of gmail's contact suggestion and now gmail is helping us to prevent this type of mistake. Got the wrong Bob? is a lab feature that can help us so that we can't do these type of mistake.

But to prevent sending email to wrong place, we need to be careful.

I got Google Wave

2009-10-14T14:22:00.002+07:00

I got an invitation of Google Wave from one of my friend. He got it few months ago. I was really happy to get that invitation. Its took few days to get the invitation after my friend invited me. When he invited me, they said "Invitations will not be sent immediately. We have a lot of stamps to lick."

I added the Sudoku Extension and played together with friends. Its really enjoyable to play like that.

I didn't get any option to send invitation, so I can't send any invitation. There are many of my friends are asking for the invitation now. I hope googlewave will give me the option to send invitation soon.

Add Blogger to Webmaster Tools

2009-10-13T12:34:00.001+07:00

go to webmasters

Click the Add a Site.. button.

Copy the blogger URL address and paste, then click Continue

Copy the meta code.

Go to blogger Layouts and Click Edit HTML. Then paste the meta link just belo

Then click SAVE TEMPLATE

now back to webmaster and click Verify

Its done in less than 7 steps :)

copy files over ssh

2009-10-11T12:57:00.000+07:00

Following command can be use to copy files across an ssh (Secure Shell) connection by scp (Secure Copy) in Linux. Its encrypted and secured.

one file

scp file.ext user@192.168.1.101:/home/user/directory/

many files with same extension

scp *.ext user@192.168.1.101:/home/user/directory/

a directory/folder

scp -r dir/ user@192.168.1.101:/home/user/directory/

MySQL Insert from another table

2009-10-10T10:36:00.000+07:00

Its easy to insert data to a table from another table in MySQL by query.

insert into database01.table1 (c1, c2, c3) select cx1, cx2, cx3 from database02.anotherTable