I have a datagrid that allows users to add new rows using a footer. When the user clicks a button, the footer becomes visible with textboxes to add data. My problem comes when validating the data the users are adding. <BR><BR>For example, in one textbox I want to make sure the user inputs an integer and that the field is not blank. I can't use the required field validator because if the user merely wants to update a row, the add data textboxes will be empty(though not visible as showfooter will be false) and the validation will fail. I also tried using custom validation and checking the data server side where I could then validate only if showfooter was true. However, it appears that if my text box in which I want to add data is empty the custom validation function that I have created on my code behind page never gets called. <BR><BR>Has anyone run into something similar? Any ideas? Thanks in advance!