Append records to a Gridview from a control

Question

Hello all.
I have a simple aspx page with a textbox which is the control, gridview and SQLDatasource which connects to a view on our SQL server. It succesfully finds a record when an ID is entered into the textbox.

Here is my problem. I do not wish to just show one record at a time. I wish to build the gridview from the records found, in other words appending records to the gridview.

Has anyone had experiance in this please?