ASP.NET TreeView - Postback on node select


Please select a person from the address book to retrieve the contact
information from the database, without reloading the page.
Address Book
Human Resources
Martin Nielsen
Public Relations
Ann Smith
Sales
Bob Smith
Jennifer Jones
Technical
John Willis

The server-side events are being triggered using
the client-side events and our free AJAX Page control.

Please visit the Server-Side Events section for more information
about how to download and use the AJAX Page control.

Download Download this working example.
Enabling the Node Select event

    oTree.EventList = "OnNodeSelect";
    
Sending the data to the server-side event

function ob_OnNodeSelect(id)
{   
	// add client side code here
	//alert("OnNodeSelect on " + id);
	if(ob_ev("OnNodeSelect"))
	{	    
		if(typeof ob_post == "object")
		{
			// if a person was selected - not a department
			if(id.indexOf("oCont_") != -1)
			{	            
				// add the parameter needed on server-side
				// id will be a server-side argument for the OnNodeSelect method
				// we use only the id of the contact from the database 
				// (not the whole id of the selected node)
				ob_post.AddParam("id", id.replace("oCont_", ""));	
				
				ob_post.post(null, "OnNodeSelect", displayContactInfo);
			}
		}
		else
		{
			alert("Please add obout_Postback ASP.NET control to 
				your page to use the server-side events");
		}
	}
}
   
Implementing the server-side method

public void OnNodeSelect(int id)
{
	// return the server response.
	// ...
}
    
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