NodeExpanding Property

This event is fired, before a tree node expands.

Syntax

Visual Basic

'Declaration
 
Public Property NodeExpanding As String

C#

public string NodeExpanding {get; set;}

Remarks

Action can be canceled.

Example

Visual Basic

WebDataTree1.ClientEvents.NodeExpanding = "WebDataTree_NodeExpanding"

C#

WebDataTree1.ClientEvents.NodeExpanding = "WebDataTree_NodeExpanding";

JScript

// The client event 'NodeExpanding' takes two parameters sender and e
// sender  is the object which is raising the event
// e is the DataTreeNodeEventArgs
function WebDataTree_NodeExpanding(sender, e) {

    //Gets the node object that is expanding
    var node = e.getNode();

    //Gets the text of the node
    var nodeText = node.get_text();

    if (!confirm("Are you sure you want to expand the node '" + nodeText + "'?"))
    //Cancels the NodeExpanding event
        e.set_cancel(true);

}

Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2