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ASP.NET TreeView Sort

, 11 Sep 2011 CPOL
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Easy way to sort nodes in a TreeView using a recursive function.
A few days ago, I needed to sort the nodes of a tree view. The solutions that I found over the Internet did not please me, so I decided to write my own. This solution is a simple recursive function that sorts tree nodes in an alphabetic order.

Create your tree view and add your nodes:

TreeView mytree = new TreeView();
//add your nodes here

Then simply call the sort function with the main node as the argument:

sort(node);

Here is the recursive function:

private void sort(TreeNode node)
{
    foreach (TreeNode n in node.ChildNodes)
        sort(n);
    try
    {
        TreeNode temp = null;
        List<TreeNode> childs = new List<TreeNode>();
        while(node.ChildNodes.Count>0)
        {
            foreach (TreeNode n in node.ChildNodes)
                if (temp == null || n.Text[0] < temp.Text[0])
                    temp = n;
            node.ChildNodes.Remove(temp);
            childs.Add(temp);
            temp = null;
        }
        node.ChildNodes.Clear();
        foreach (TreeNode a in childs)
            node.ChildNodes.Add(a);
    }
    catch { }
}

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

brunofer2007
Software Developer (Senior) Martifer Inovação e Gestão
Portugal Portugal
No Biography provided

Comments and Discussions

 
Questionincorrect comparison PinmemberMember 1024692319-Nov-14 4:04 
Suggestioncompare full words PinmemberKlimovec12-Apr-12 3:49 
GeneralHeyy it worked for me. Currently i have a treeview which pop... Pinmemberrjkumar19879-Jan-12 3:27 
GeneralRe: just replace the logical comparison "n.Text[0] < temp.Text[0... Pinmemberbrunofer200715-Jan-12 0:59 
just replace the logical comparison "n.Text[0] < temp.Text[0]" with other comparison logical.
It have to be a TreeNode property.
General1-The datasource should be sort not the tree in asp.net. An... PinmemberJoePatent13-Sep-11 9:03 
GeneralRe: 1 - Sometimes a TreeView doesn't have necessarily a datasour... Pinmemberbrunofer200714-Sep-11 1:36 
GeneralCould I ask, why can't you use the default TreeView Sort met... PinmemberGeorge Swan11-Sep-11 21:11 
GeneralRe: Hello George, as you can see in the title, this solution is ... Pinmemberbrunofer200711-Sep-11 23:21 

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