rdlc导出Excel

using System;    
using System.Data;     
using System.Configuration;     
using System.Web;     
using System.Web.Security;     
using System.Web.UI;     
using System.Web.UI.WebControls;     
using System.Web.UI.WebControls.WebParts;     
using System.Web.UI.HtmlControls;     
using Microsoft.Reporting.WebForms;     
using CrystalDecisions.Shared;     
using CrystalDecisions.CrystalReports.Engine;     
using System.IO;public partial class _Default : System.Web.UI.Page    
{     
    protected CrystalDecisions.CrystalReports.Engine.ReportDocument reportDocument1=new ReportDocument();     
    protected void Page_Load(object sender, EventArgs e)     
    {    }    
     protected void Button1_Click1(object sender, EventArgs e)     
    {        Microsoft.Reporting.WebForms.Warning[] Warnings;    
        string[] streamids;     
        string mimeType;     
        string encoding;     
        string fileNameExtension;        Microsoft.Reporting.WebForms.LocalReport lr = new Microsoft.Reporting.WebForms.LocalReport();
        string deviceInfo = "<DeviceInfo>" + "<SimplePageHeaders>True</SimplePageHeaders>" +  "</DeviceInfo>";
        lr.ReportPath = Server.MapPath("Report2.rdlc");
        lr.DataSources.Add(new ReportDataSource("DataSet1_ord", ObjectDataSource1));
        byte[] bytes = lr.Render("Excel", deviceInfo, out mimeType,  out encoding,out fileNameExtension, out streamids, out Warnings);
        using (FileStream fs = new FileStream(@"C:\study_net2005\Report2.xls", FileMode.Create))    
        {     
            fs.Write(bytes, 0, bytes.Length);     
            fs.Close();     
        }       //客户端不行    
       // object o = System.Reflection.Missing.Value;     
       // Excel.Application excelapp = new Excel.ApplicationClass();     
       //// Excel.Workbook wkbook = excelapp.Workbooks.Open("C:\\study_net2005\\Report2.xls", o, o, o, o, o, o, o, o, o, o, o, o);     
       // Excel.Workbook wkbook = excelapp.Workbooks.Open("C:\\study_net2005\\Report2.xls", o, o, o, o, o, o, o, o, o, o, o, o,o,o);     
       // excelapp.Visible = true;      // //wkbook.PrintPreview(true);//预览   
       // wkbook.PrintOut(o, o, o, o, o, o, o, o);//打印   
       // wkbook.Save();     
       // excelapp.Quit();    }    
}