private void GridViewMaster_SelectionChanged(object sender, EventArgs e)
        {
           try
            {
                DataGridViewRow grow = new DataGridViewRow();
                grow = GridViewMaster.CurrentRow;
                if (grow != null && grow.Cells["Id"].Value.ToString() != "")
                {
                    RowID = grow.Cells["Id"].Value.ToString();
                    DataRow[] drow = dtMain.Select("Id ='" + RowID + "'");
                    foreach (DataRow dr in drow)
                    {
                        setControlTextClear();
                        strBillNo = dr["BillNo"].ToString();

                        strTime = Convert.ToDateTime(dr["ProduceDate"].ToString());
                        strIsDept = dr["isDept"].ToString();

                        txt_OrderNo.Text = dr["BillNo"].ToString();

                        txt_Staff.Text = dr["StaffId"].ToString();
                        txt_StaffName.Text = dr["StaffName"].ToString();
                        dt_ProduceDate.Value = Convert.ToDateTime(dr["ProduceDate"].ToString());

                        txt_WorkOrderNo.Text = dr["WorkOrderNo"].ToString();
                        dt_ProduceDate.Value = Convert.ToDateTime(dr["ProduceDate"].ToString());
                        txt_ProduceQty.Text = dr["ProduceQty"].ToString();
                        txt_standard.Text = dr["standard"].ToString();
                        txt_ProduceTime.Text = dr["ProduceTime"].ToString();
                        txt_complement.Text = dr["complement"].ToString();
                        txt_Remark.Text = dr["remark"].ToString();
                        txt_BomId.Text = dr["BomId"].ToString();

                        txt_PartNo.Text = dr["PartNo"].ToString();
                        txt_PartName.Text = dr["PartName"].ToString();

                        txt_Approve.Text = dr["CurrentApprove"].ToString();
                        txt_ApproveStatus.Text = dr["Status"].ToString();
                        txt_AmountQty.Text = dr["AmountQty"].ToString();
                        txt_createper.Text = dr["createper"].ToString();
                        txt_createdate.Text = dr["createdate"].ToString();
                        txt_modifyper.Text = dr["modifyper"].ToString();
                        txt_modifydate.Text = dr["modifydate"].ToString();

                        if (IsStartApprove("ProduceTimeForSPY"))
                        {
                            string Obj = ClsAddFlowApprove.GetCurrentApproverStatus(txt_OrderNo.Text);
                            if (Obj == "待审核" || Obj == "待送审" || Obj == "" || Obj == "已退回")
                            {
                                tm_Add.Enabled = true;
                                cm_Approve.Enabled = true;
                                cm_MainAddDetail.Enabled = true;
                                if (Obj == "待审核")
                                { cm_Approve.Enabled = false; }
                            }
                            else
                            {
                                tm_Add.Enabled = false;
                                cm_Approve.Enabled = false;
                                cm_MainDelete.Enabled = false;
                                cm_MainAddDetail.Enabled = false;
                                cm_MainEdit.Enabled = false;

                            }//*/

                           
                        }
                        else
                        {
                            cm_Approve.Enabled = false;
                        }
                        if (state == operatestate.Isopt)
                            setControlTextClear();
                    }//foreach
                }//if
            }//try
            catch (Exception err)
            {
                MessageBox.Show("(108)提示信息：" + err.Message.ToString());
            }
        }

各位大吓，帮帮忙啊

是哪一行抛出的异常

超出索引了吧？