.NET MVC下调用水晶报表

using CrystalDecisions.CrystalReports.Engine;

public ActionResult Report()
{
    ReportClass rptH = new ReportClass();
    rptH.FileName = Server.MapPath("[reportName].rpt");
    rptH.Load();
    rptH.SetDataSource([datatable]);
    Stream stream = rptH.ExportToStream(CrystalDecisions.Shared.ExportFormatType.PortableDocFormat);
    return File(stream, "application/pdf");  
}