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How to get index of all the nodes in a TreeView?

David Miller209521-Nov-2014

I tried using:

TreeNode node = TreeView1.FindNode()

but it only finds root nodes. It is not able to find Child Nodes.

I want to get index of all the nodes and after that I want to use above code to find nodes by index and Check the Checkbox.

I tried using foreach to iterate through all the nodes, but I am not able to find child nodes and index.

I am using Visual Studio 2013.

asp.netc# .net 
Updated on 21-Nov-2014
David Miller

David Miller

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1 Answers

Mark Devid

Mark Devid

21-Nov-2014

The following method allows you to traverse through a tree:

public static IEnumerable<T> Traverse<T>(
    this IEnumerable<T> source
    , Func<T, IEnumerable<T>> childrenSelector)
{
    var stack = new Stack<T>(source);
    while (stack.Any())
    {
        var next = stack.Pop();
        yield return next;
        foreach (var child in childrenSelector(next))
            stack.Push(child);
    }
}

Using this you can write:

var allNodes = new[]{root}.Traverse(node => node.Nodes);

You can then do whatever you want with the sequence of all of the nodes in the whole tree and do whatever you want with them.

 

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