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Stopping Duplicates in TreeView

Hello,

I'm attempting to call a WebService to return a list of clients and their subsiduaries, these are returned individually as part of a list. So for example, client NobodyCorp has 3 sub-companies, Nope, Nothing and none. So this would be returned as:

ClientName = NobodyCorp
Company = Nope

ClientName = NobodyCorp
Company = Nothing

ClientName = NobodyCorp
Company = None

I'm then hoping to add these to a treeview so that they appear as follows:

NobodyCorp
- Nope
- Nothing
- None

However I'm struggling to stop it adding separate parent trees for NobodyCorp. I've tried to state if this node already exists, then try and add a child, but I've really gotten nowhere.

Can some help please be provided? I have googled for this but can't seem to return anything useful other than adding it and foreaching through the list.

Or if there was a method that I could add the details to a 2 dimension list, and for any client which is already in the list just add its sub companies to that index in the list.

AndyAinscow

When you have a child node you need to specify the parent node it belongs to. It sounds like you are specifically creating a new parent node every time you attempt to add the child rather than reusing the parent.

angus_young_acdc

ASKER

How can I re-use the parent?

AndyAinscow

private void button1_Click(object sender, EventArgs e)
{
TreeNode tvn = this.treeView1.Nodes.Add("Parent");
tvn.Nodes.Add("Child1");
tvn.Nodes.Add("Child2");
tvn.Nodes.Add("Child3");

tvn = this.treeView1.Nodes.Add("Another Parent");
tvn.Nodes.Add("Child x");
tvn.Nodes.Add("Child y");
tvn.Nodes.Add("Child z");
}

0009.jpg

angus_young_acdc

ASKER

I'm already able to add them like that, which works fine, my issue is that if I have numerous objects in the returned list I don't want duplicate parent names. So in my example above of the 3 different items with the same client name, I would want to have 1 client name as the parent but all 3 of the sub companies added under this.

AndyAinscow

As I said earlier, add the clients to that one parent.

Fernando Soto

Hi angus_young_acdc;

You state that, "I'm attempting to call a WebService to return a list of clients and their subsiduaries, these are returned individually as part of a list".

What is the return type of the data, List<CustomObject>, List<String> - formatted how?
What version of Visual Studio?
What platform, Windows Forms or Web?

Fernando

ASKER CERTIFIED SOLUTION

AndyAinscow

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AndyAinscow

ps. It is coded to work with my sample earlier - two nodes ("Parent" and "Another Parent") each with three child nodes.