This example demonstrates how to show a delete confirmation dialog using ASPxPopupControl. In this example, ASPxGridView is created with a custom button; the ASPxClientGridView.CustomButtonClick event is handled. ASPxPopupControl is shown on ASPxClientGridView.CustomButtonClick and if the ASPxPopupControl's "Yes" button is clicked, then the ASPxClientGridView.DeleteRow method is called.
See also: How to implement a delete confirm dialog with a "don't ask me again" option
GridView - How to show a confirmation dialog using PopupControl