using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Data; namespace ******** {     public class DataSet     {         public DataTable CreatDataSet()         {             DataTable dt = new DataTable();             dt.Columns.Add("A");             dt.Columns.Add("B");             dt.Columns.Add("C");             return dt;         }     } }

ReportViewer viewer = new ReportViewer();             viewer.ProcessingMode = ProcessingMode.Local;             viewer.LocalReport.ReportEmbeddedResource = "***.Page.Report.Report1.rdlc";             ReportDataSource rds_1 = new ReportDataSource("DataSet1", dtReport);//DataSet1為報表裏面的數據源名稱             viewer.LocalReport.DataSources.Add(rds_1);             ReportParameter rp1 = new ReportParameter("參數1","參數1的值" );//給參數賦值             ReportParameter rp2 = new ReportParameter("參數2","參數2的值" );             viewer.LocalReport.SetParameters(new ReportParameter[] {rp1, rp2 });             Warning[] warnings;             string[] streamIds;             string mimeType = string.Empty;             string encoding = string.Empty;             string extension = string.Empty;             byte[] bytes = viewer.LocalReport.Render("Excel", null, out mimeType, out encoding, out extension, out streamIds, out warnings);             //Excel ,PDF ,Word 等格式             // Now that you have all the bytes representing the PDF report, buffer it and send it to the client.             Response.Buffer = true;             Response.Clear();             Response.ContentType = mimeType;             Response.AddHeader("content-disposition", "attachment; filename=1_" + DateTime.Now.ToString("yyyyMMddhhssmm") + "" + "." + extension);             Response.BinaryWrite(bytes); // create the file             Response.Flush(); // send it to the client to download

DataTable dt = new DataTable();//自己拼出數據源就可以                 ReportDataSource repDataSource = new ReportDataSource("DataSet1", dt);                 //*設置報表參數,并顯示                 this.rpResut.LocalReport.ReportEmbeddedResource = "***.Page.Report.Report1.rdlc"";                 this.rpResut.LocalReport.DataSources.Clear();                 this.rpResut.LocalReport.DataSources.Add(repDataSource);                  ReportParameter rp1 = new ReportParameter("參數1","參數1的值" );//給參數賦值                   ReportParameter rp2 = new ReportParameter("參數2","參數2的值" );                 this.rpResut.LocalReport.SetParameters(new ReportParameter[] {rp1, rp2 });                 this.rpResut.DataBind();                 this.rpResut.LocalReport.Refresh();