Question

Using VS 2008 I have a windows form with 2 ListViews (we will call them ListView1 and ListView2). ListView1 is populated with FileNames from a directory. When an item is dragged from ListView1 to ListView2 I have some code that is executed. When I dragDrop from ListView2 to ListView1 some code executes. What I want to do is NOT execute the code if you dragdrop from ListView2 onto itself

Here is the dragDrop Method which is invoked after a drop:

private void view_DragDrop(object dropTarget, DragEventArgs e)

I have tried a few items such as below:

ListView data = (ListView)e.Data.GetData("System.Windows.Forms.ListView")

This returns null what I wanted to do with the above is see if data = dropTarget, do not execute.

Answer 1

create you a variable, in the scope of your form

object dfrom;
//your methods ect
    private void view_ItemDrag(Object sender, System.Windows.Forms.ItemDragEventArgs e)
    //your code to drag items
    dfrom = sender
}
private void view_DragDrop(object dropTarget, System.Windows.Forms.DragEventArgs e)
{
    if (dfrom == sender){return;}//this will protect both list boxes (assuming you can drag from both).
    //Your code
}