Access denied. Error in File C:\WINDOWS\TEMP\

Question

I have searched on Google and all over this forum and none of the solutions have fixed my problem.
Crystal Version: Crsytal.Net for Visual Studio.Net 2005
Server: Windows Server 2003
Error:
Access denied. Error in File C:\WINDOWS\TEMP\JuryDutyReport {D6296178-3E72-483E-B876-2DFC03D00841}.rpt: Access to report file denied. Another program may be using it.
When I run my app locally through the Web Server that comes with ASP.Net, everything is fine, it is only when I deploy the application to the Windows 2003 Server that I get the error.
I'm using impersonation in my ASP.Net application.  I have given that domain user full access to 'C:\Windows\Temp'', the export folder and even the folder where the Crystal Report resides on the Server.  When I run the application on the Web Server, I actually see the ".rpt" get created in the "C:\Windows\Temp" folder but yet it still says there is a permissions error.
What is bizarre is that the code below that just sends the file to the printer automatically works:
  private void PrintJuryDutyReport(DataSet ds)
        //create report document
        ReportDocument crDoc = new ReportDocument();
        //load, set datasource and print options
        crDoc.Load(Server.MapPath("~/Reports/JuryDutyReport.rpt"));
        crDoc.SetDataSource(ds); //set datasource
        crDoc.PrintOptions.PrinterName = ddlPrinters.SelectedValue.ToString(); //set printername
        crDoc.PrintOptions.PaperOrientation = PaperOrientation.Portrait; //set paper orientation
        crDoc.SetParameterValue("ParamUsername", User.Identity.Name); //set parameter
        crDoc.PrintToPrinter(1, false, 0, 0); //send to printer
I have to change the code to export to a PDF and this code doesn't work:
    private void PrintJuryDutyReport(DataSet ds)
        //report document
        ReportDocument crDoc = new ReportDocument();
        string myfile = @"G:\COPFS\COPFSPROD\ReportsTemp\MyPDF.pdf";
        //load, set datasource and print options
        crDoc.Load(Server.MapPath("~/Reports/JuryDutyReport.rpt"));
        crDoc.SetDataSource(ds); //set datasource
        crDoc.SetParameterValue("ParamUsername", User.Identity.Name); //set parameter
        //export through http
        crDoc.ExportToDisk(ExportFormatType.PortableDocFormat, myfile);
        crDoc.Close();
        crDoc.Dispose();
        Response.ClearContent();
        Response.ClearHeaders();
        Response.ContentType = "Application/pdf";
        Response.AppendHeader("content-disposition", "attachment; filename=" + myfile);
        Response.WriteFile(myfile);
        Response.Flush();
        Response.Close();
Any help is greatly appreciated as I have to present this to end users tomorrow.

Answer 1

Don, thanks for the response.
As a last ditch effort, I granted "modify" to the Network Service Account on C:\Windows\Temp and that fixed the error.
There are two things that are troubling about this:
1) I'm impersonating a domain user in my ASP.Net application and when the PDF is created, the owner is that domain user, so I know impersonation is working.  So I wonder if ASP.Net picks and chooses what account it runs under at different times?
2) It is a little scary for the Network Service Account to have this access but that people seem to be fine with it.
http://aspadvice.com/blogs/rjdudley/archive/2005/03/14/2566.aspx