How to export styleclass applied crystal report to pdf and excel

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CrystalReports

Hi friends,

I am using C#,ASP.NET,.NET FRAMEWORK 2.,crystal reports 9.
I have used a style class in crystal report.
But that styles are not applying when export to pdf and excel.

I am using the following code for exporting.
export to pdf

Response.Buffer = false;
        // Clear the response content and headers
        Response.ClearContent();
        Response.ClearHeaders();
        try
        {
            // Export the Report to Response stream in PDF format and file name Customers
            myReport.ExportToHttpResponse(ExportFormatType.PortableDocFormat, Response, false, "OperationalResultsStandard");
            // myReport.ExportToHttpResponse(ExportFormatType.PortableDocFormat, Response, false, "");

            // There are other format options available such as Word, Excel, CVS, and HTML in the ExportFormatType Enum given by crystal reports
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
            ex = null;
        }

export to excel

Response.Buffer = false;
       // Clear the response content and headers
       Response.ClearContent();
       Response.ClearHeaders();
       //Response.ContentType = "application/pdf";
       //Response.AddHeader("content-disposition", "inline;filename=report.pdf");
       try
       {
           // Export the Report to Response stream in Excel format and file name Customers
           myReport.ExportToHttpResponse(ExportFormatType.Excel, Response, false, "OperationalResultsStandard");
           // myReport.ExportToHttpResponse(ExportFormatType.PortableDocFormat, Response, false, "");

           // There are other format options available such as Word, PDF, CVS, and HTML in the ExportFormatType Enum given by crystal reports
       }
       catch (Exception ex)
       {
           Console.WriteLine(ex.Message);
           ex = null;
       }

Thanks in advance
george