populating a form with data from a SQL server, then updating

Question

Hello, I wrote a form which so far just consists of text fields and checkboxes.  The data from previous entries is loaded when the page loads and then I set the values of each field (for example, contactname.Text = dbread["contactname"].ToString();).  The problem is that when I populate the fields on page load, the stored procedure I'm using to update the values uses this information rather than the information actually current in the TextBoxes.  I want users to be able to change and update the information, but also have it preloaded with the last data they submitted.  Any advice would be greatly appreciated.

Thanks.