ASP.NET TreeView sort - asp.net

Question

I am accustomed to winform TreeView having a Sorted property which automatically manages nodes sorting.
I now have to alphabetically sort an ASP.NET TreeView and I'm surprised I cannot find any similar property or callback method.
Is there any way to automatically achieve this operation in ASP.NET or do I have to manually sort and insert my nodes in correct order?

Answer 1

You'll need to write your own sorting function but its reasonably trivial to add this functionality.
http://blog.mdk-photo.com/post/C-Extentionmethod-Tree-Node-View-Sort().aspx
.NET 3.5 supports extension methods so you can add functionality to pre-existing System Classes. Notice the this syntax on the method parameter. More Info Here
public static void Sort(this TreeView tv)
{
TreeNodeCollection T = tv.Nodes.Sort();
tv.Nodes.Clear();
tv.Nodes.AddRange(T);
}
public static void Sort(this TreeNode tn)
{
TreeNodeCollection T = tn.ChildNodes.Sort();
tn.ChildNodes.Clear();
tn.ChildNodes.AddRange(T);
}
The first link contains the rest of the code you'll need to complete the sorting functionality

Answer 2

Three years later and the TreeView still doesn't support sorting natively. Here's a simple method to do sort all nodes alphabetically.
private void SortTreeNodes(TreeNodeCollection treeNodes)
{
var sorted = true;
foreach (TreeNode treeNode in treeNodes)
{
SortTreeNodes(treeNode.ChildNodes);
}
do
{
sorted = true;
for (var i = 0; i < treeNodes.Count - 1; i++)
{
var treeNode1 = treeNodes[i];
var treeNode2 = treeNodes[i + 1];
if (treeNode1.Text.CompareTo(treeNode2.Text) > 0)
{
treeNodes.RemoveAt(i + 1);
treeNodes.RemoveAt(i);
treeNodes.AddAt(i, treeNode2);
treeNodes.AddAt(i + 1, treeNode1);
sorted = false;
}
}
} while (!sorted);
}
Call it like this
SortTreeNodes(myTreeView.Nodes);