如何判断query如果有两条以上的数据就用逗号来分割 只有一条就不用逗号 KPMISDataBase kp = new KPMISDataBase();
                    Repeater rp = e.Row.Cells[9].FindControl("Repeater1") as Repeater;
                    var query = from o in kp.Inv_PurInvoiceMatch
                                where o.POp_ID == gvFPInfo.DataKeys[e.Row.RowIndex].Value.ToString()
                                select new
                                {
                                    o.PInv_No
                                };
                    rp.DataSource = query;
                    rp.DataBind();