C#

Dominik Reichl wrote:

How do CancelEventHandlers work? I think the delegates get called in a random order. What if the first delegate in the chain sets the Cancel property to true, but the second one resets it to false? Will the caller (i.e. the one who sent the event) get true or false in this case?

class CancelEventArgs
{
  bool cancel = false;
  
  public bool Cancel
  { 
    get {return cancel;}
    set {if (!cancel) cancel = value;}
  }
}

public class TestCancellableEvents
{
    public static void Main()
    {
         TestClass test = new TestClass();
         test.MyEvent += new MyDelegate(test_MyEvent);
         test.MyEvent += new MyDelegate(test_MyEvent2);

         test.doit();
 }

     void test_MyEvent2(object sender, CancelEventArgs args)
     {
        //do nothing this won't be called
     }

     void test_MyEvent(object sender, CancelEventArgs args)
     {
         //Cancel event, so the following handlers in the chain won't be called
         args.Cancel = true;
     }

 public class CancelEventArgs
 {
     bool cancel = false;

     public bool Cancel
     {
         get { return cancel; }
         set { cancel = value; }
     }
 }

 public delegate void MyDelegate(object sender, CancelEventArgs args);
 public class TestClass
 {
     public event MyDelegate MyEvent;

     public void doit()
     {
         Delegate[] list = MyEvent.GetInvocationList();
         CancelEventArgs args = new CancelEventArgs();
         foreach (MyDelegate handler in list)
         {
             handler(this, args);
             if (args.Cancel)
             {
                 break;
             }
         }
     }
 }

Vitaliy Tsvayer wrote:

Delegate[] list = MyEvent.GetInvocationList();

public MyDelegate MyEvent;

private MyDelegate MyEvent;
[MethodImpl(MethodImplOptions.Synchronized)]
public void add_MyEvent(MyDelegate value)
{
      this.MyEvent = (MyDelegate) Delegate.Combine(this.MyEvent, value);
}

[MethodImpl(MethodImplOptions.Synchronized)]
public void remove_MyEvent(MyDelegate value)
{
      this.MyEvent = (MyDelegate) Delegate.Remove(this.MyEvent, value);
}

class1.MyEvent += new MyDelegate(this.test_MyEvent);

TAREQ F ABUZUHRI wrote:

i want to make C# application that can search to any statment and then replace this statment

TAREQ F ABUZUHRI wrote:

how can make my application will print this word file

TAREQ F ABUZUHRI wrote:

finaly i dont want to make save to any change at this file ( close file without save)

AnnnS wrote:

how can i ressolve this issue ??

leppie wrote:

Search for the DirectShow.NET lib on SourceForge.