How to check whether treeview root node has child nodes exists or nor

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I have a treeview with a root node initially as Root. If i right click on Root node i will have a context menu displayed with some options as New and other if i select New i will add a child node to the Root node. If i again Right click on the Root node and if the Root has child nodes i would like to clear all child nodes and add a new child node how can i do this

Posted 23-Sep-10 1:14am

demouser743

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OriginalGriff 23-Sep-10 7:53am

"But the node count will always be 1 na so how can i know whether child nodes exists or not - Dorababu743 10 mins ago"
Cobblers! Try it:

            TreeView tv = new TreeView();
            TreeNode n = new TreeNode();
            Console.WriteLine("Roots: " + tv.Nodes.Count);
            tv.Nodes.Add(n);
            n = new TreeNode();
            Console.WriteLine("Roots: " + tv.Nodes.Count);
            tv.Nodes.Add(n);
            Console.WriteLine("Roots: " + tv.Nodes.Count);
            TreeNode sn = new TreeNode();
            Console.WriteLine("SubNodes: " + n.Nodes.Count);
            n.Nodes.Add(sn);
            Console.WriteLine("SubNodes: " + n.Nodes.Count);
            sn = new TreeNode();
            n.Nodes.Add(sn);
            Console.WriteLine("SubNodes: " + n.Nodes.Count);

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OriginalGriff · Answer 1 · 2010-09-23T01:31:00

Solution 1

Look at:

TreeNode.Nodes.Add(childNode)
TreeNode.Nodes.Clear()
TreeNode.Nodes.Count

All available on MSDN via Google.

Posted 23-Sep-10 1:31am

OriginalGriff

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demouser743 23-Sep-10 7:41am

But the node count will always be 1 na so how can i know whether child nodes exists or not

demouser743 23-Sep-10 7:41am

I know how to add child nodes but the one i asked is different

How to check whether treeview root node has child nodes exists or nor

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Solution 1

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How to check whether treeview root node has child nodes exists or nor

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