private void DragDropTreeView_DragDrop(object sender, DragEventArgs e)
{
if (e.Data.GetDataPresent("System.Windows.Forms.TreeNode", false) && _nodeMap != "")
{
var movingNode = (TreeNode)e.Data.GetData("System.Windows.Forms.TreeNode");
var nodeIndexes = _nodeMap.Split('|');
var insertCollection = Nodes;
for (var i = 0; i < nodeIndexes.Length - 1; i++)
{
insertCollection = insertCollection[Int32.Parse(nodeIndexes[i])].Nodes;
}
insertCollection.Insert(Int32.Parse(nodeIndexes[nodeIndexes.Length - 1]), (TreeNode)movingNode.Clone());
SelectedNode = insertCollection[Int32.Parse(nodeIndexes[nodeIndexes.Length - 1])];
// Remove the old ersion of the node
movingNode.Remove();
// Expand if necessary
if (SelectedNode.Nodes.Count > 0 && !SelectedNode.IsExpanded)
{
SelectedNode.Expand();
}
// Fire the event (if there is a handler attached)
var args = new DragDropReorganizeFinishedEventArgs {
Node = SelectedNode
};
if (DragDropReorganizeFinished != null)
{
DragDropReorganizeFinished(this, args);
}
}
}
private void treeView_DragDropReorganizeFinished(object source, DragDropReorganizeFinishedEventArgs e)
{
// This event is fired when a node is dropped in its new place.
// e.Node is the node that has been dropped.
var parentDescription =
e.Node.Parent != null
? "under '" + e.Node.Parent.Text + "'"
: "at the top level";
// Update the status bar to show what happened
statusLabel.Text = string.Format(
"'{0}' has been positioned at index {1} {2}",
e.Node.Text,
e.Node.Index,
parentDescription);
}
