Simple Extension Methods: C# Programming

Simple Extension Methods: C# Programming

1. Create a namespace for the extension methods. (i.e. ExtensionMethods)
2. Cteate a class. (i.e. MyExtensions)
3. Now create the extension methods in the class.

Here, we are extending string type to have a new extension method 'WordCount':

using System;
using System.Text;

namespace ExtensionMethods
{
public static class MyExtensions
{
public static int WordCount(this String str)
{
return str.Split(new char[] { ' ', '.', '?' }, StringSplitOptions.RemoveEmptyEntries).Length;
}
}
}


4. Now, lets use this extension method:

using System;
using ExtensionMethods;

namespace ThreadTest
{
class Program
{

static void Main(string[] args)
{
string str = "You are rocking";
Console.WriteLine(str.WordCount());
}
}
}

5. That's it. Happy coding.

Sql Server - Add linked server via script.

exec sp_addlinkedserver 'ServerName\DATABASE,3262'

Findout the recently modified objects in sql database

SELECT name, create_date, modify_date

FROM sys.objects

WHERE type = 'P'

order by modify_date desc

Find a string in all Stored Procedures

Find a string in all Stored Procedures:

SELECT OBJECT_NAME(id)
FROM syscomments
WHERE [text] LIKE '%foobar%'
AND OBJECTPROPERTY(id, 'IsProcedure') = 1
GROUP BY OBJECT_NAME(id)

Send mail from asp.net

1. Create a MailHelper class.

public class MailHelper
    {
        public static void SendMailMessage(string from, string to, string bcc, string cc, string subject, string body)
        {
            MailMessage mMailMessage = new MailMessage();
            mMailMessage.From = new MailAddress(from);
            mMailMessage.To.Add(new MailAddress(to));

            if (!(string.IsNullOrEmpty(bcc)))
            {
                mMailMessage.Bcc.Add(new MailAddress(bcc));
            }

            if (string.IsNullOrEmpty(cc))
            {
                mMailMessage.CC.Add(new MailAddress(cc));
            }

            mMailMessage.Subject = subject;
            mMailMessage.Body = body;
            mMailMessage.IsBodyHtml = true;
            mMailMessage.Priority = MailPriority.Normal;

            // Instantiate a new instance of SmtpClient
            SmtpClient ss = new SmtpClient();
            //ss.EnableSsl = true;
            ss.Timeout = 10000;
            ss.DeliveryMethod = SmtpDeliveryMethod.Network;

            mMailMessage.BodyEncoding = UTF8Encoding.UTF8;
            mMailMessage.DeliveryNotificationOptions = DeliveryNotificationOptions.OnFailure;
            ss.Send(mMailMessage);
        }

2. Add the following smtp configuration in Web.config file.

My system is damn slow, what to do?

This post is an initiative for tips to improve the speed of system running Windows 7, so that we dont waste the system resources:

1. RacTask : Microsoft Reliability Analysis task to process system reliability data.
If you want to speed up your task rather than this analysis, diable this task in TaskScheduler.
Task Scheduler > Task Scheduler Library > Microsoft > Windows > RAC > RacTask > right click > disable

2.

Session state can only be used when enableSessionState is set to true

asp.net issue:
Session state can only be used when enableSessionState is set to true, either in a configuration file or in the Page directive. Please also make sure that system.Web.SessionStateModule or a custom session statemodule is included in the \\ section in the application configuration.

One possible solution - Set the startup page in your website.

Some Googling tricks

1. Go to www.google.com
Type "intitle:indes of" abc

abc can be replaced by anthing like: hack pdf OR abobe OR akon mp3

Now, browse the links in search result page and download if you find something interesting.


2. Go to www.google.com
Type inurl:"viewerframe?mode=refresh"


3. Go to www.google.com
Type intext:"UAA(MSB)" Lexmark-ext.pdf


4. Type elgoog

5. inurl:/view/index.shtml

spy the database sp changes

SELECT name, create_date, modify_date
FROM sys.objects

WHERE type = 'P'

order by modify_date desc

Find out, why the net is so slow?

• Type cmd in your Windows Run box.
• Type "netstat -b 5 > activity.txt" and press enter.
• After say 2 minutes, press Ctrl+C.
• Type "activity.txt" on the command line to open the log file in notepad

Why WCF RIA Services?

1. To provide best user experience the client application should be aware of business logic at server-side, WCF RIA service solves this problem by providing framework components, tools, and services that make the server-side application logic available to the RIA client without requiring you to manually duplicate the business layer programming logic at presentation layer.
2. RIA Client application always gets latest business rules as it get compiled.
3. RIA Services adds tools to Visual Studio that enable linking Client project(Silverlight) and Server project(Asp.net) in a single solution and generating code for the Client project from the middle-tier code.
4. The framework components support prescriptive patterns for writing application logic so that it can be reused on the presentation tier.
5. Domain Service - In RIA Services, you expose data from the Server project to Client project by adding domain services. Here, each domain service gets implemented as WCF Service.

Silverlight Animation

Silverlight uses timeline concept for animation (not frame based, used by Flash). There is a StoryBoard at the heart of every animation here. StoryBoard can contain one or more Key Frame elements.

There are 4 type of Key Frames here:
1. Linear : Moves from the starting state to the end state in a smooth, linear fashion.
2. Discrete : Jumps from starting state to end state instantaneously.
3. Spline : Moves from the starting state to the end state varying speed based on mathematically defined curve.
4. Easing : A more evolved version of Spline, moves from the starting state to the end state based on a easing funcation.

Outlook Addin Setup Project

Prob:  Manifest registry key in Addins changing from
[PRODUCTDIR]MyAddin.vsto|vstolocal
to
[PRODUCTDIR]MyAddin.manifest

Sol: Install Visual Studio 2008 SP1

Report Viewer not working in dev server (the + sign for grouping is not coming, rather a red X image coming)

Prob. - The report locally works fine, but when moved to the web server and try to pull it up it throws javascript errors.

Error msg : 'RSClientController' is undefined .....
'ClientControllerReportViewer1' is null or is not an object.

What's odd is - it appears the report actually runs despite the javascript errors, but the resulting report has the red "X"s on the image tags in the control itself and the report returns no data.

Soln :

1. The .axd extension in the application config in IIS should set to use framework  2.0 instead of 1.1

2. If the 1st soln is not working,
Click on the application virtual directory in IIS7 and click on the 'Handler Mappings' section. Then 'Add Managed Handler'
Request path: Reserved.ReportViewerWebControl.axd
Type: Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=9.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
Name: Reserved.ReportViewerWebControl.axd

Once this was created, it worked fine in the Integraded mode AppPool.

3. Just add the following line to my web.config (it should get added automatically, but if not then ..)




 
4. If still not working !
- then, I have to see the code, post me that.

Soap Basic :

Interfaces for collections classes - System.Collection

Object-type collections classes are in - System.Collection
Generic collection classes are in - System.Collection.Generic
Specific Collection classes are in - System.Collection.Specialized

Generic interfaces:-
1. IEnumerable<T> - derives from IEnumerable interface
2. ICollection<T>
3. IList<T> - derives form ICollection interface
                  allows to access the collection with indexer
4. IDictionary<T> - implemented by ICollection interface
5. ILookup<T> - multiples values for a key
6. IComparer<&> - has only compare() function to compare two objects
7. IEqualityComparer<T>

Non-Generic versions of interfaces:-
1. IEnumerable - required if a foreach statement is used with the collection
2. ICollection
3. IList - derives form ICollection interface
             allows to access the collection with indexer
4. IDictionary - implemented by ICollection interface
                      has key and value pair
 

Ctrl+. and Shft+Alt+F10 shortcuts for Visual Studio

There are few great shortcuts for Visual Studio.

1. The Ctrl+. OR Shift+Alt+F10 - are great shortcuts for adding the required namespaces in a class.

2. Ctrl+E,D - This shortcut is for developers, who have the habit of keeping the code well formatted.

3. Shift+Alt+Enter - All time fav. - for full screen.