DevExpress AspxGridView Confirm with CustomButton click

DevExpress AspxGridView中自定义button，点击时提示confirm：

<ClientSideEvents CustomButtonClick="function(s,e){if (e.buttonID == 'delete') {if ( confirm('您确定要删除？'))  { e.processOnServer = true; }  else { e.processOnServer = false; }} else {e.processOnServer = true;}}" />

用了两年多dev，确实需要整理一下，好多东西查了又都忘了。