Delegates in C#?

Delegates in C#?

• nowhereman1960

  Can you be more specific Delegates can be used for event handlers, method pointers, and Asynchronicity...
  
  

• Tridex

  <code>

  public delegate void DelegatePrintHello();

  public class _mclass : Form{

  public DelegatePrintHello m_DelegatePrintHello;

  public _mclass()

  {

  m_DelegatePrintHello = new m_DelegatePrintHello(this._displayMsg);

  }

  public void _displayMsg(object sender, EventArgs e)

  {

  MessageBox.Show("Delegate called me");

  }

  private void Form_Load(object sender, EventArgs e)

  {

  m_DelegatePrintHello(this, new EventArgs());

  //m_DelegatePrintHello();

  }

  }

  Hopefully you get the jist. This code is untested.

  Martin

  
  

• Abhishek.itb

  Hi, Sunil

  MSDN is always for you: http://msdn2.microsoft.com/en-us/library/900fyy8e(VS.71).aspx

  http://msdn.microsoft.com/library/default.asp url=/library/en-us/csref/html/vcwlkDelegatesTutorial.asp

  Since you seem to be a beginer, just leave the multicast and anonymous delegate concept for later reading.

  You'd first read, then if you have any questions pls feel free to let me know.

  Thank you

  
  
  

• Peter Jausovec - MSFT

  Hi,

  delegates in C# are strongly typed function pointers. The benefit of delegates are that you can specify a function signature in a method and call that method without having to know which underlying method you are really calling which has the same signature as the delegate.

  Some examples are creating a thread, i.e. ThreadStart delegate specifies a method with zero parameters and a void return type:

  i.e.

  Thread t =new Thread(new ThreadStart(MyFunction));

  ...

  void MyFunction()

  {

  //do some work

  }

  Other examples are sorting algorithms, where you need to pass in a function to a method that can be used for sorting.

  Mark.

  
  
  
• Delegates in C#?