ItemCommand & PageIndexChanged event in Datagrid

[rain1178]

Hi, I have a datagrid and i allow paging in this datagrid. So when the user click on the number then the page will link to the clicked page. However, after i added some code in ItemCommand in order to get some value. The PageIndexChanged event cannot be triggered. My page got error in ItemCommand part when the user click the page index on the datagrid. The error msg is "Object reference not set to an instance of an object. ". Why the PageIndexChanged event can't be trigger? How to make it trigger?:confused: