TreeListCustomDataCallbackEventArgs Class

Provides data for the ASPxTreeList.CustomDataCallback event.

Namespace: DevExpress.Web.ASPxTreeList

Assembly: DevExpress.Web.ASPxTreeList.v20.2.dll

NuGet Package: DevExpress.Web

Declaration

C#

public class TreeListCustomDataCallbackEventArgs :
    TreeListCustomCallbackEventArgs

VB.NET

Public Class TreeListCustomDataCallbackEventArgs
    Inherits TreeListCustomCallbackEventArgs

Related API Members

TreeListCustomDataCallbackEventArgs is the data class for the following events:

• ASPxTreeList.CustomDataCallback

Example

This example shows how to display the number of selected nodes. The client-side ASPxClientTreeList.SelectionChanged event is handled to send a callback to the server to obtain the number of selected nodes. This information is set to the client (ASPxClientTreeList.CustomDataCallback event) and displayed below the ASPxTreeList.

The image below shows the result:

C#

protected void ASPxTreeList1_CustomDataCallback(object sender,
DevExpress.Web.ASPxTreeList.TreeListCustomDataCallbackEventArgs e) {
    e.Result = ASPxTreeList1.SelectionCount.ToString();
}

ASPX

<ClientSideEvents CustomDataCallback="function(s, e) {
    document.getElementById('lbSelectionInfo').innerHTML = e.result;
}"

SelectionChanged="function(s, e) {
    treeList.PerformCustomDataCallback('');
}" />

Inheritance

Object

EventArgs

TreeListCustomCallbackEventArgs

TreeListCustomDataCallbackEventArgs