hi i place a gridview control in form. i add the column in gridview using edit column properties of gridview control.
I place the the column as S.NO,ItemName,Rate,Tax,Qty,Total. If click a add button i can enter data manually in gridview control first row. but set the property of control in gridview datagridviewtextbox control. can u tell us how to enter during runtime.

Connect the gridview with the datasource and then in the properties, set allow user to add rows property to true(default) and you are done.