Making the dragged node a sibling of the destination node
HOW-TO
Make the dragged node sibling of the destination node when using drag and drop
SOLUTION
The forthcoming custom modification of RadTreeView's NodeDrop event handler shows the means to implement this functionality:
protected void HandleDrop(object sender, RadTreeNodeEventArgs NodeEvent)
{
RadTreeNode sourceNode = NodeEvent.SourceDragNode;
RadTreeNode destNode = NodeEvent.DestDragNode;
RadTreeNodeCollection collection;
if (sourceNode != destNode.Parent)
{
if(sourceNode.ParentNodeCollection == destNode.ParentNodeCollection)
{
collection = sourceNode.ParentNodeCollection;
sourceNode.Remove();
}
else
{
collection = sourceNode.ParentNodeCollection;
sourceNode.Remove();
collection = destNode.ParentNodeCollection;
}
int index = 0;
foreach(RadTreeNode node in collection)
{
if (node.Text == destNode.Text)
{
break;
}
index++;
}
collection.Insert(index, sourceNode);
}
}
Take into account that the dragged node will precede the destination node. You can change the code in order to meet the conventions of your project.