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Disable all parent nodes

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Andy Green
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Andy Green asked on 09 Dec 2008, 11:56 AM
Hi

I've a tree view bound to a database, this is my code, and it works OK.

 

Dim Exp As New clsExpert

 

Dim dt As DataTable = Exp.GetChildByProvider(UserID, ProviderID)

 

If dt.Rows.Count > 0 Then

 

With Me.tvNav

 

.DataSource = dt

.DataFieldID =

"ID"

 

 

.DataFieldParentID ="ParentID"

 

 

.DataTextField = "Node"

 

 

.DataValueField = "ChildID"

 

 

.DataBind()

 

.ExpandAllNodes()

 

End With

 

 

Else

 

 

Me.lblNavStatus.Text = "No Children set up."

 

 

End If

This gives me a 2 level tree, with groups and children. How can I disable the top level nodes to stop users from clicking them and getting an error, as these first level nodes dont have any ID's associated with them.

Andy

 

 

 

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Princy
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answered on 09 Dec 2008, 12:54 PM
Hi,

Try the following javascript code to prevent selection of the parent node.

JS:
<script type="text/javascript"
function OnClientNodeClicking(sender, eventArgs) 
  var node = eventArgs.get_node();   
 
  if(node.get_nodes().get_count()>0) 
  { 
    eventArgs.set_cancel(true); 
   
   } 
   
  
</script> 


Thanks
Princy.
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Andy Green
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answered on 16 Dec 2008, 10:36 PM
Thanks for reply and appologies for not coming back sooner, battling with RadGrid hierarchy at the moment.

I tried this and disabled all node, not just the top ones.

Andy
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Veselin Vasilev
Telerik team
answered on 17 Dec 2008, 07:56 AM
Hello Andy Green,

Princy's code should work as expected. It would cancel the OnClientNodeClicking event of all nodes that have children.
What exactly is the behavior that you see?

Sincerely yours,
Veselin Vasilev
the Telerik team

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Andy Green
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answered on 22 Dec 2008, 10:44 AM
Thanks Princy,

Not sure what I did, but tried it again and it worked first time.

Andy
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Andy Green
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Princy
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Andy Green
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Veselin Vasilev
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