Error Data type mismatch in criteria expression. ที่คำสั่ง UPDATE ตลอดๆ

           strSQL = "UPDATE AtWork SET Vacation = '" + txtID.Text + "' ,Other = '" + txtother.Text + "' ";
             strSQL += " WHERE IdEmp = '" + myGridView.DataKeys[e.RowIndex].Value + "'";
            objCmd = new OleDbCommand(strSQL, objConn);
            objCmd.ExecuteNonQuery();