这个问题搞不懂啊，求懂的人给讲解讲解 <pre class='brush:csharp'> Report report = new Report(); report.Load(Application.StartupPath + "\\发货单模板4.frx"); DataTable sourceDt = ((DataView)(gvTradeList.DataSource)).Table; DataView dv = sourceDt.Copy().DefaultView; dv.RowFilter = "Selected=True"; report.RegisterData(dv.ToTable(), "TradeSnd_M"); DataBand data = report.FindObject("MasterData1") as DataBand; data.DataSource = report.GetDataSource("TradeSnd_M"); DataTable dtDetail = new DataTable(); T_Trade_TradeGoodsListManager manager = new T_Trade_TradeGoodsListManager(); dtDetail = manager.GetDataTable(); dtDetail.Columns.Add("strId", System.Type.GetType("System.String")); foreach (DataRow dr in dtDetail.Rows) { dr["strId"] = dr["TradeId"]; } report.RegisterData(dtDetail.DefaultView, "Detail"); DataBand data2 = report.FindObject("DetailData1") as DataBand; data2.DataSource = report.GetDataSource("Detail"); data2.Filter = "[Detail.strId]==[TradeSnd_M.Id]"; report.Prepare(); report.Design(); report.Dispose(); </pre> 这一段代码，在 report.Prepare();的时候报错，报错信息是“未能比较两个集合”