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Drag & Drop

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23896 Jan 23,2005 04:48 PM Jan 24,2005 03:47 AM Windows Forms 2
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Tags: GridControl
Louis Lebrun
Asked On January 23, 2005 04:48 PM

Hi, I want to do some drag & drop operations between two grids. And it''s not allowed to drop everywhere. Where it''s not allowed to drop I''d like to be able to show the drag icon.circle with a line. I tried to listen to DragOver and there to set up DragDropEffects to .none. But I wasn''t successful at all. What could be the simplest way to do that. (If any some sample code will be welcomed.) Louis

Administrator [Syncfusion]
Replied On January 24, 2005 01:55 AM

I think the simplest way to do this is to derive the grid and override OnDragOver.
public class MyGridControl : GridControl
{
	protected override void OnDragOver(DragEventArgs drgevent)
	{
		base.OnDragOver (drgevent);
		int row, col;
		Point pt = this.PointToClient(new Point(drgevent.X, drgevent.Y));
		if(this.PointToRowCol(pt, out row, out col))
		{//dont drop in col 2
			if(col == 2)
			{
				drgevent.Effect = DragDropEffects.None;
			}
		}
	}
}

Louis Lebrun
Replied On January 24, 2005 03:47 AM

Thank''s a lot. Louis

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