Buffer cannot be null. Parameter name:Buffer

Hi,

I am using Http handler page to get images from database into gridview using C# in asp.net.

I am trying to delete the selected row from database, when I click on delete button the row is deleted and the page redirecting to http handler page and firing the error "'Buffer cannot be null. Parameter name:Buffer'". How to solve this problem.

And one more thing is I don't want to go to execute every time pageload event, how can I control this event also.

Thank you somuch