gridview related problem

Question

hello,

i've a gridview of columns 4 to 5.

1st column is id column. so i dont want that whenever i click on row editing,then the default textbox should not be display during editing in the id column.

when i was using this "id" column's readonly property "true", it always updated all the rows insted of particular row.

now i am using following code:-

 if (e.Row.RowType == DataControlRowType.DataRow && e.Row.RowState == DataControlRowState.Edit)

        {

            TextBox tbox1 = (TextBox)e.Row.Cells[2].Controls[0];

            tbox1.ReadOnly = true;

        }

but the problem is that during editing textbox of "ID"columrn is displaying in readonly mode but in alternative rows of gridview, i can write as well.

but simply i dont want to show this textbox..and how can i disable from whole gridview ratherthan alternate rows.

please help me.

thank you