代码如下：

//水晶报表的填充，省略连接代码
myReport ReportDoc = new myReport();
ReportDoc.SetDataSource(ds);
Crv.ReportSource = ReportDoc;
 
//输出为指定类型文件
CrystalDecisions.Shared.DiskFileDestinationOptions DiskOpts = new          CrystalDecisions.Shared.DiskFileDestinationOptions();
ReportDoc.ExportOptions.ExportDestinationType = CrystalDecisions.Shared.ExportDestinationType.DiskFile;
string strFileName = server.MapPath("Output");
switch (ddlFormat.SelectedItem.Text)
{
     case "Rich Text (RTF)":
              ReportDoc.ExportOptions.ExportFormatType =   CrystalDecisions.Shared.ExportFormatType.RichText;
              DiskOpts.DiskFileName =strFileName + ".rtf";
         break;
     case "Portable Document (PDF)":
              ReportDoc.ExportOptions.ExportFormatType =   CrystalDecisions.Shared.ExportFormatType.PortableDocFormat;
              DiskOpts.DiskFileName = strFileName + ".pdf";
         break;
     case "MS word (DOC)":
              ReportDoc.ExportOptions.ExportFormatType =   CrystalDecisions.Shared.ExportFormatType.WordForWindows;
              DiskOpts.DiskFileName = strFileName + ".doc";
         break;
     case "MS excel (XLS)":
              ReportDoc.ExportOptions.ExportFormatType =   CrystalDecisions.Shared.ExportFormatType.Excel;//
              DiskOpts.DiskFileName = strFileName + ".xls";
         break;
     default:
         break;
}
ReportDoc.ExportOptions.DestinationOptions = DiskOpts;
ReportDoc.Export();
 
//打印
// 指定打印机名称  
string strPrinterName;
strPrinterName = @"Canon Bubble-Jet BJC-210SP";
// 设置打印页边距
PageMargins margins;
margins = ReportDoc.PrintOptions.PageMargins;
margins.bottomMargin = 250;
margins.leftMargin = 350;
margins.rightMargin = 350;
margins.topMargin = 450;    
ReportDoc.PrintOptions.ApplyPageMargins(margins);    
//应用打印机名称
ReportDoc.PrintOptions.PrinterName = strPrinterName;    
// 打印   // 打印报表。将startPageN 和endPageN
// 参数设置为0 表示打印所有页。
ReportDoc.PrintToPrinter(1， false，0，0);