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how to customize the displayname using the data binding

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Daniel asked on 18 Aug 2011, 01:47 PM
I have the following problem. 
There is a table "Account" having following properties.
Number -> prim key
isParent -> flag indicating if parent

I'm trying to bind this table with the radtreeview. Using the code:

  RadTreeView treeView = this.mView.AccountTreeView;
            treeView.DisplayMember = "Name";
            treeView.ParentMember = "ParentNumber";
            treeView.ChildMember = "Number";
            treeView.DataSource = this.mDataSet.Account;
This works well and I have the treehierarchy (self referencing), but I would like to customize the displayMember, that not only the name is showned 
but the combination between the name and number. For example
Name = justname
What I need are the nodes looking like this 
node -> 22222||justname
As you can see it is not just the merging these two fields but also cutting of the first two digits from the number
Another case:
Name = nameTwo
node -> 5678||nameTwo

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answered on 23 Aug 2011, 09:02 AM
Hi Daniel,

Thank you for writing.

You can achieve the desired behavior by handling the NodeFormatting event. When handling the event, get the desired strings and set the Text property of TreeNodeContentElement. The following code concatenates the Text property with the value of the "pid" column:

void radTreeView1_NodeFormatting(object sender, Telerik.WinControls.UI.TreeNodeFormattingEventArgs e)
    DataRowView view = (DataRowView)e.Node.DataBoundItem;
    string s = view.Row["pid"].ToString();
    if (s != string.Empty)
        e.NodeElement.ContentElement.Text = e.Node.Text + " | " + s;

I hope that you find this information helpful. Should you have any other questions, do not hesitate to contact us.
All the best,
the Telerik team

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