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ReportViewer1.LocalReport.ReportPath = MapPath("/Web/Report/Rep_Material.rdlc");//指定报表模板路径
Microsoft.Reporting.WebForms.ReportDataSource rds = new Microsoft.Reporting.WebForms.ReportDataSource("Material", dt);//注意这里的name和报表中的一致
ReportParameter rp = new ReportParameter("");
ReportViewer1.LocalReport.SetParameters(new ReportParameter[] { rp });
//ReportViewer2.ZoomMode = ZoomMode.PageWidth;
ReportViewer1.LocalReport.DataSources.Clear();
ReportViewer1.LocalReport.DataSources.Add(rds);
ReportViewer1.LocalReport.Refresh();