I have a control called "UserProfile". It displays data from a user's profile, as the name suggests. And it works great, except that it only shows the data from the first record in the table. How do I tell a control which record to show? In other languages, the DataSource or DataSet classes typically have a "QueryString" property I can set at run time. But I can't seem to find anything similar to this in asp.net, and it certainly doesn't appear to be an acesible property of my control.