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New Message on BDOTNET
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From: Anand_2004
Message 1 in Discussion
Hi Folks , In todays session I am talking about Extension methods
Extension method is a very interesting feature of C# 3.0.Extension method
provides the ability to extend the functionality of a existing class or any
existing type by writing a new static method and invoked through a normal
instance method .Extension method declare through the keyword this as a
modifier on the first parameter of the method. The below cod snippet
demonstrates a extension method called StrLen(..) which display the string
which is more then 4 characters long .
using System;
using System.Collections.Generic;
using System.Text;
using System.Query;
using System.Xml.XLinq;
using System.Data.DLinq;
namespace Extension_Method
{
public static class Extensions
{
public static void StrLen(this string friendsName)
{
if (friendsName.Length>4)
Console.WriteLine(friendsName);
}
}
class Program
{
static void Main(string[] args)
{
string[] friendsName = new string []{"Anand","Sasi", "Sudha" , "Arun",
"Anjana"};
foreach (string strName in friendsName)
friendsName.StrLen(strName);
Console.ReadLine();
}
}
}
Extension method is very much useful in some certain situation like you want
to extent the functionality a class or type belongs to a 3rd party library
in your project and the library does not expose the necessary class or
interface , through extension method you can enhance the required
functionalities . Please post me your queries on C# 3.0 @ [EMAIL PROTECTED]
Cheers Anand https://anandkumar2004.wordpress.com/
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