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4 Items, 1 Pages 1 |< << Go >> >|

	rajendra937
	Asp.Net User

TreeView Event Handling

4/21/2004 3:28:39 AM

0/0

Hi,

Is there an event "onclick" for TreeView IE web control?

I want to write an event handler for when I click on a node that has child nodes, it should expand.

That is the user can either click on the + sign to expand the node or might expand by just clicking on the text too.

could anybody please help me with this? and also, what is the best way to store a treeview so that I don't have to re-populate the treeview from database everytime. If storing in a view state is best, then how to store it in viewstate and how to delete from it when required?

Any help is greatly appreciated. will be eagerly waiting for a reply.

Thankyou.

	bitTwiddler
	Asp.Net User

Re: TreeView Event Handling

4/21/2004 2:04:28 PM

0/0

There is no onclick event (a possible exception might be that gifted individual who could hack the javascript in the htc file ;-))

Check out the reference <a href="http://msdn.microsoft.com/library/default.asp?url=/workshop/webcontrols/webcontrols_entry.asp"</a>. The events are listed under the TreeView object in the TreeView Webcontrol Reference, as are the arguments. You should be able to see the events on the dropdowns in your code-behind page.

SelectExpands=true will expand a node by clicking the text. No events are fired from a node with a NavigateUrl (that one cost me some time).

Hope this helps.

	rajendra937
	Asp.Net User

Re: TreeView Event Handling

4/21/2004 3:46:55 PM

0/0

Hi Twiddler,

thanks for your reply.

SelectExpands = true is working for me.

Could you please tell me how to maintain the state of TreeView, so that I don't have to re-populate the treeview from database everytime i go to a different page.

I read somewhere, that one can store the treeview in viewstate.....but I don't know how.

And also how to delete from it when required.

Will be eagerly waiting for your reply.

Thanks once again.

Raj.

	whirlpool
	Asp.Net User

Re: TreeView Event Handling

5/27/2005 4:59:19 PM

0/0

This works (dont ask me why):

Put this in your .ASPX page:

   <SCRIPT lang="jscript" >

   function Treeview1_onclick( )
   {
    alert("onclick" );
   }
   var treeclick=Treeview1_onclick;
   </SCRIPT>
   <ie:TreeView runat="server" SystemImagesPath="/webctrl_client/1_0/treeimages" ID="Treeview1" onclick="treeclick()" >
    <ie:TreeNode TreeNodeSrc="xml/menu_ProductionReports.xml" Expanded="true" ImageUrl="/webctrl_client/1_0/images/root.gif"
     Text="My Tree"></ie:TreeNode>
   </ie:TreeView>

4 Items, 1 Pages 1 |< << Go >> >|

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Web:
Creating event handlers for tree view For the Tree View component, you can create event handlers for the individual nodes or for the tree as a whole at a global level.
TreeView.BeforeExpand Event (System.Windows.Forms) Public Event BeforeExpand As TreeViewCancelEventHandler. Visual Basic (Usage). Dim instance As TreeView Dim handler As TreeViewCancelEventHandler AddHandler ...
TreeView Event Handling - ASP.NET Forums Is there an event "onclick" for TreeView IE web control? I want to write an event handler for when I click on a node that has child nodes, it should expand. ...
Event Handling TreeView - C# - Forums at ProgrammersHeaven.com Jul 18, 2006 ... Event Handling TreeView: I'm looking to add event handling to the nodes within a TreeView. I have not found any useful examples/tutorials ...
Tree View Double Click Event Handler not working properly Tree View Double Click Event Handler not working properly - Microsoft Dot NET Framework Forms. Visit our forum to discuss Tree View Double Click Event ...
YUI4JSF - Apr 15, 2008 ... TreeView component can invoke your server side event handling methods when an item clicked, expanded or collapsed. Since it calls your event ...
Know Dot Net - Handling TreeView & ComboBox Click Events How to get the selected node when the AfterSelect event does not fire. ... Handling TreeView & ComboBox Click Events. AfterSelect Event Does Not Fire When ...
Delayed event handling for WinForms applications - VBInfoZine Article Jun 8, 2005 ... Now suppose that we want to postpone the TreeView.AfterSelect event handling to accommodate for fast keyboard-driven navigation. ...
Kevin Hurwitz: A little help with the .NET WinForms TreeView Jul 12, 2008 ... Second, there is no ideal event for handling what would seem to be the most basic TreeView event - a user selecting a node. ...
[MonoDevelop] Stetic add-in and treeview widget event question Apr 9, 2006 ... Just as a simple test what I am trying to do is add a treeview to my ... So far my event handlers work ok for the >> KeyReleaseEvent but ...

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