How to: Create Custom Command Buttons
This example shows how to create and customize a custom command button.
To create and customize a custom button at design-time, invoke the editor used to manage the TreeListCommandColumn.CustomButtons collection:
You can specify the button’s text, image and in which nodes the custom button is displayed. In this example, the custom button is displayed within a browsable node.
To define an action, handle the client ASPxClientTreeList.CustomButtonClick event.
<ClientSideEvents CustomButtonClick="function(s, e) {
alert("A custom button has been clicked.");
}" />
The below shows the result: