Hi!

Does anyone know how an event handler is added to a dynamically created button control. I have button which should be able to add new buttons once clicked. The new button needs to be movable using drag and drop. HELP!!!! ERik

Hi,

hope that helps:
 

  Private uc As New MyUserControl 

  Public Sub CreateUserControl
    AddHandler uc.Fire, AddressOf HandleMyUserControlEvent
  End Sub

  Private Sub HandleMyUserControlEvent(ByVal sender As System.Object)
   ...
  End Sub

  Public Sub DeleteUserControlHandler
    RemoveHandler uc.Fire, AddressOf HandleMyUserControlEvent
  End Sub 

Stefan

Hi!
I have watch you video (very good) but I'm trying to add an MouseLeftButtonDown, MouseLeftButtonUp and MouseMove event handlers to a dynamcally created button  iin order to enable drag and drop.

I write:

 void addButton_Click(object sender, RoutedEventArgs e)
        {
            Button b = new Button();
            b.Content = "TEST";
            b.Width = 100;
            b.Height = 20;

            b.MouseLeftButtonDown += new MouseButtonEventHandler(Page_MouseLeftButtonDown);
            b.MouseLeftButtonUp += new MouseButtonEventHandler(Page_MouseLeftButtonUp);
            b.MouseMove += new MouseEventHandler(Page_MouseMove);
          
            LayoutRoot.Children.Add(b);
        }

The event handlers works fine for a button i declare in xaml. The difference is that the button declared in xaml has a x:name and the code behind has not (can't be done)

Any ideas!

Regards Erik

 Button b = new Button();
 Button.SetValue(Button.NameProperty, "Button1");  // this is how you set the button name in code

sladapter
Software Engineer
Aprimo, Inc

Please remember to mark the replies as answers if they answered your question

I asked this question on a comment on a developers blog and Erik saw it.  He e-mailed me about it.  I discovered the problem is the type of the parent control.

The problem with the code above is the type of "LayoutRoot".  If it is a Grid it will not allow absolute positioning.  It needs to be a Canvas to enable dragging of the control.  If you need LayoutRoot to be a grid for other reasons you can create a new Canvas and add the button to that.  if you named it "myCanvas" you'd use: myCanvas.Children.Add(b)

I mention it in comments here in slightly different wording: http://silverlight.net/blogs/videos/archive/2008/05/06/50561.aspx#51563