Export specific format report directly (Local Report)

在按钮单击事件中加入如下代码，可以实现直接导出特定格式的报表文件的功能

 

            string orderIDCollection = "1,2,3";

            //new a ReportViewer control

            ReportViewer rview = new Microsoft.Reporting.WebForms.ReportViewer();

            rview.ProcessingMode = ProcessingMode.Local;  

            rview.LocalReport.ReportPath = "rptOrder.rdlc";

            rview.ExportContentDisposition = ContentDisposition.AlwaysAttachment;
            //get datasource 

            List<OrderInfo> orderList = new List<OrderInfo>(GetOrderList(orderIDCollection));     

	    //assign datasource for report

            rview.LocalReport.DataSources.Add(

                new Microsoft.Reporting.WebForms.ReportDataSource("OrderInfoDataSet",

                orderList));



            rview.LocalReport.Refresh();

        

            string mimeType, encoding, extension, deviceInfo;

            string[] streamids;

            Microsoft.Reporting.WebForms.Warning[] warnings;

            string format = "PDF";

            //Desired format goes here (PDF, Excel, or Image)

            deviceInfo ="<DeviceInfo>" +"<SimplePageHeaders>True</SimplePageHeaders>" +"</DeviceInfo>"; 

            byte[] bytes = rview.LocalReport.Render(format, deviceInfo, out mimeType, out encoding, out extension, out streamids, out warnings); 

            Response.Clear();

            Response.ContentType = "application/pdf";

                Response.AddHeader("Content-disposition", "filename=output.pdf");

           

            Response.OutputStream.Write(bytes, 0, bytes.Length);

            Response.OutputStream.Flush();

            Response.OutputStream.Close();

            Response.Flush();

            Response.Close();