Control.DragDrop Event
Occurs when a drag-and-drop operation is completed.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
The X and Y properties of the DragEventArgs are in screen coordinates, not client coordinates. The following line of Visual C# code converts the properties to a client Point.
Point clientPoint = targetControl.PointToClient(new Point(de.X, de.Y));
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In versions earlier than .NET Framework 2.0, if you put a UserControl with DragEnter and DragDrop events on a Windows Form and drag and drop something onto the UserControl at design time, the DropDrop and DropEnter events are raised. However, when you close and reopen the solution, the DragEnter and DragDrop events are not raised again. |
For more information about handling events, see Consuming Events.
This code excerpt demonstrates using the DragDrop event. See the DoDragDrop method for the complete code example.
private void ListDragTarget_DragDrop(object sender, System.Windows.Forms.DragEventArgs e) { // Ensure that the list item index is contained in the data. if (e.Data.GetDataPresent(typeof(System.String))) { Object item = (object)e.Data.GetData(typeof(System.String)); // Perform drag-and-drop, depending upon the effect. if (e.Effect == DragDropEffects.Copy || e.Effect == DragDropEffects.Move) { // Insert the item. if (indexOfItemUnderMouseToDrop != ListBox.NoMatches) ListDragTarget.Items.Insert(indexOfItemUnderMouseToDrop, item); else ListDragTarget.Items.Add(item); } } // Reset the label text. DropLocationLabel.Text = "None"; }
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
