void tree_DragDrop(object sender, System.Windows.Forms.DragEventArgs e)
{
System.Windows.Forms.TreeNode NewNode;
if (e.Data.GetDataPresent("System.Windows.Forms.TreeNode", false))
{
Point pt = ((System.Windows.Forms.TreeView)sender).PointToClient(new Point(e.X, e.Y));
if (sender != tree)
{
return;
}
TreeNode DestinationNode = ((TreeView)sender).GetNodeAt(pt);
if (DestinationNode != null)
{
NewNode = (TreeNode)e.Data.GetData("System.Windows.Forms.TreeNode");
TreeNode parent = DestinationNode;
while ((parent = parent.Parent) != null)
{
if (parent == NewNode)
{
return;
}
}
if (DestinationNode != NewNode)
{
NewNode.Remove();
DestinationNode.Nodes.Add(NewNode);
NewNode.EnsureVisible();
this.tree.SelectedNode = NewNode;
}
}
}
}