Tree View Control

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Tree View Control

 
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  #1
Aug 11th, 2009
Hello,

I have a treeview control and want to add a node to it at a desired location or as the child of a Certain Node X.The problem is I will know nodename[or the Text displayed ] of X only at runtime.

How do I Iterate the tree to find the given Node and add a child to it ??

Do I have to write a recursive function that iterates the nodes of a tree,find the given node and add a child to it OR is there an easier way to do this..
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Re: Tree View Control

 
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Aug 11th, 2009
Based on what information you want to add child nodes?
Can you explain more about why you want to do this, this will help us to provide better solution.
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Re: Tree View Control

 
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Aug 11th, 2009
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Originally Posted by seebharath View Post
Hello,

I have a treeview control and want to add a node to it at a desired location or as the child of a Certain Node X.The problem is I will know nodename[or the Text displayed ] of X only at runtime.

How do I Iterate the tree to find the given Node and add a child to it ??

Do I have to write a recursive function that iterates the nodes of a tree,find the given node and add a child to it OR is there an easier way to do this..
Use the TreeView's TreeNodeCollection Find method:
public TreeNode[] Find(string key, bool searchAllChildren);

Then, peruse the returned array for your specific node and Add your new node.
Last edited by DdoubleD; Aug 11th, 2009 at 11:37 am. Reason: spelling
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Re: Tree View Control

 
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Aug 11th, 2009
If you are not actually using the TreeNode.Name (was unclear), you will need to use recursion on the TreeNode.Text. Let me know if you need help with that.
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Re: Tree View Control

 
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Aug 11th, 2009
Hai,
Thanks for the Quick response..
If I do TreeView's TreeNodeCollection Find method it will return me a treenodecollection and any changes I do will not be reflected in the actula treeview.Please correct me if I am wrong..
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Re: Tree View Control

 
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Aug 11th, 2009
Hai..
IF I am using Treenode.Name then how can I proceed to search for a given Node and append a child to it..??
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Re: Tree View Control

 
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Aug 11th, 2009
Hai,
@DangerDev
I get a input from the user and based on this input there will be corresponding node in my tree view(Can be at any level inside the treeview),and I will know only its name .Have to find this node and append my child node to it..
Where I add my child Node depends on the user and has to be done at runtime..
Hope this Helps..
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Re: Tree View Control

 
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Aug 11th, 2009
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Originally Posted by seebharath View Post
Hai,
Thanks for the Quick response..
If I do TreeView's TreeNodeCollection Find method it will return me a treenodecollection and any changes I do will not be reflected in the actula treeview.Please correct me if I am wrong..
It will return a reference to the node collection, so your changes will apply.
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Re: Tree View Control

 
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Aug 11th, 2009
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Originally Posted by seebharath View Post
Hai,
@DangerDev
I get a input from the user and based on this input there will be corresponding node in my tree view(Can be at any level inside the treeview),and I will know only its name .Have to find this node and append my child node to it..
Where I add my child Node depends on the user and has to be done at runtime..
Hope this Helps..
If you are searching on the TreeNode text, you can use the following recursion:
[CODE]
public static TreeNode FindTreeNodeText(TreeNodeCollection nodes, string findText)
{
TreeNode foundNode = null;
for (int i = 0; i < nodes.Count && foundNode == null; i++)
{
if (nodes[i].Text == findText)
{
foundNode = nodes[i];
break;
}
if (nodes[i].Nodes.Count > 0)
foundNode = FindTreeNodeText(nodes[i].Nodes, findText);
}
return foundNode;
}
[\CODE]
The node collection is the TreeView's Nodes (tv.Nodes). If found, you simply foundNode.Add(new TreeNode());
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Re: Tree View Control

 
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  #10
Aug 11th, 2009
Reposting method: I don't know why the tags didn't display the code properly. If this fixes your problem, please flag as Solved--thanx.
C# Syntax (Toggle Plain Text) 
  1.         public static TreeNode FindTreeNodeText(TreeNodeCollection nodes, string findText)
  2.         {
  3.             TreeNode foundNode = null;
  4.             for (int i = 0; i < nodes.Count && foundNode == null; i++)
  5.             {
  6.                 if (nodes[i].Text == findText)
  7.                 {
  8.                     foundNode = nodes[i];
  9.                     break;
  10.                 }
  11.                 if (nodes[i].Nodes.Count > 0)
  12.                     foundNode = FindTreeNodeText(nodes[i].Nodes, findText);
  13.             }
  14.             return foundNode;
  15.         }
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