I develop a report(name is oRpt) which contain a subReport,I using the following code to export the report sheet to a word page:

         CrystalDecisions.Shared.ExportOptions myExportOptions ; CrystalDecisions.Shared.DiskFileDestinationOptions myDiskFileDestinationOptions
    string myExportFile = "a.doc";
         if ( ! System.IO.Directory.Exists( myExportFile ) ) { System.IO.Directory.CreateDirectory( myExportFile );
                }

         myDiskFileDestinationOptions = new CrystalDecisions.Shared.DiskFileDestinationOptions (); myDiskFileDestinationOptions.DiskFileName = myExportFile;
    myExportOptions = oRpt.ExportOptions;

         myExportOptions.DestinationOptions = myDiskFileDestinationOptions;

    myExportOptions.ExportDestinationType = CrystalDecisions.Shared.ExportDestinationType.Disk File;

         myExportOptions.ExportFormatType = CrystalDecisions.Shared.ExportFormatType.WordForWi ndows;

         oRpt.Export();

    Response.ClearContent();
    Response.ClearHeaders();
         Response.ContentType = "application/vnd.ms-word";

    Response.Redirect( "a.doc", false );
    Response.Flush();
    Response.Close();

The Master Report display correctly in the word page, but the sub report can not display the data from datasouce,only the txtObject in it can be seen.
And both the Master report and subreport display well in the CrystalReportViewer.

Can anybody help me about this? Expect for your reply ! Thanks first!

I have find out the reason :)
The field object in report must have enough space, then it will display correctly in pdf,doc as well as in the CrystalReportViewer.