I am building an application page in SharePoint 2013 (c#). The page displays data from a sql server table. I have a stored procedure that runs when a user updates data. There are textboxes displaying the data on the page. The procedure runs when the Save button is clicked, however the data inserted into the textboxes is not saved. I know it's doing something, because in the table the fields are blank. Before the procedure runs they are null. I think it has to do with finding the controls on the form. How do I do that in SharePoint? With a asp.net page, it's straight forward. I am new to SharePoint and trying to get this done. Thanks.