Select a TreeNode in TreeView in asp.net C#

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I have a TreeView Control in my aspx page.

Each TreeNode has a Text & Value property in that.

for e.g.

TreeView Tr_View = new TreeView();
                        TreeNode TrNode=new TreeNode("ABC","1");
                        Tr_View.Nodes.Add(TrNode);
                        TrNode = new TreeNode("DEF", "5");
                        Tr_View.Nodes.Add(TrNode);
                        TrNode = new TreeNode("GHI", "9");
                        Tr_View.Nodes.Add(TrNode);
                        TrNode = new TreeNode("JKL", "11");
                        Tr_View.Nodes.Add(TrNode);

The Problem is that i want to select 3rd node on the basis of its value "9"

Can any body help me out

Posted 23-Mar-13 10:45am

abhinavvijay

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Maciej Los · Accepted Answer · 2013-03-23T13:03:00

Solution 1

Have a look here: Treeview.SelectedNode property (System.Web.UI.WebControls)[^]

C#

TrNode = new TreeNode("GHI", "9");
Tr_View.Nodes.Add(TrNode);
Tr_View.SelectedNode = TrNode;

That's all!!!

Posted 23-Mar-13 13:03pm

Maciej Los

Comments

Sandeep Mewara 24-Mar-13 12:28pm

Yes, a 5!

Maciej Los 24-Mar-13 12:30pm

Thank you, Sandeep ;)

abhinavvijay · Accepted Answer · 2013-03-24T04:12:00

public void SelectTreeViewOnValue(TreeView Tr_View, string TNodeValue)
        {   
            for (int nNodes = 0; nNodes < Tr_View.Nodes.Count; nNodes++)
            {
                TreeNode TrNodes = Tr_View.Nodes[nNodes];
                if (TrNodes.Value == TNodeValue)
                { TrNodes.Selected = true; break; }
                if (TrNodes.ChildNodes.Count > 0)
                {
                    bool IsFound = SelectTreeViewOnValue(TrNodes, TNodeValue);
                }
            }
        }
        private bool SelectTreeViewOnValue(TreeNode Tr_View, string TNodeValue)
        {   
            for (int nNodes = 0; nNodes < Tr_View.ChildNodes.Count; nNodes++)
            {
                TreeNode TrNodes = Tr_View.ChildNodes[nNodes];
                if (TrNodes.Value == TNodeValue)
                { TrNodes.Selected = true; return true; }
                else if (TrNodes.ChildNodes.Count > 0)
                    return SelectTreeViewOnValue(TrNodes, TNodeValue);
            }
            return false;
        }