Retrieve Record from DB to Gridview by searching name or ID

Question

Dear Sir/Madam,

                           I want to Bind the particular record from Database Table to the GridView.This happens when I enter Id or Name into the Textbox and Clicking the Image Button.

                              Actually I am getting this,but without entering any Id/Name in textbox I am getting all records of particular Table when I click ImageButton.

                           How to restrict that ImageButton in order to get records only when I select from TextBox.