WPF Drag Drop in Outlook

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WPF Drag Drop in Outlook
 
tao wen




Posts: 12
Joined: 2007-07-30
I have a problem with using Drag Drop on wpf windows opened from a add-in created by add-in express.

what I do is, show the window:
AddinStartupComplete += delegate
{
new Application().Run(new MainWindow());
};

do drag drop:
PreviewKeyUp += delegate
{
DragDrop.DoDragDrop(this, new DataObject("Hello"), DragDropEffects.All);
};
and try to respond to:
DragOver += delegate
{
MessageBox.Show("Called");
};

The data object have been set correctly, as the outlook can accept it. But our DragOver event will never be fired.
Posted 30 Jul, 2007 06:20:05 Top
Sergey Grischenko


Add-in Express team


Posts: 7160
Joined: 2004-07-05
Hi Tao.

Do you return DragDropEffects.Move in the GiveFeedback event handler of the form?




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Posted 30 Jul, 2007 16:43:02 Top
tao wen




Posts: 12
Joined: 2007-07-30
I tried to handle GiveFeedback event handler, but it was not being called at all. But QueryContinueDrag has been called, and I returned continue. It seems that the wpf can act as drop source, but failed to act as drop target.
Posted 30 Jul, 2007 22:21:54 Top
tao wen




Posts: 12
Joined: 2007-07-30
fixed by:

Loaded += delegate
{
IntPtr windowHandle = new WindowInteropHelper(this).Handle;
typeof (DragDrop).GetMethod("RegisterDropTarget", BindingFlags.Static | BindingFlags.NonPublic).
Invoke(null, new object[] {windowHandle});
};
Posted 30 Jul, 2007 23:30:08 Top