ASP.NET MVC直接运行Crystal Report绕过Crystal查看器

Question

What I'm trying to accomplish: - Run Crystal Report straight to PDF (bypassing the viewer) - It requires a database login. - It takes one parameter. It shows as '@rpt_args' in CR 11 application. - This Crystal report calls a Store procedure for it's result set.

Partial solution

My code:

        ReportClass rptH = new ReportClass();         
        //rptH.FileName = Server.MapPath("whkinvc.rpt");      
        rptH.FileName = "D:\\whkinvc.rpt";      
        rptH.Load();        
        rptH.SetDatabaseLogon("FAKEUSER", "FAKEPASSWORD", "FAKESERVER", "FAKEDB");
        rptH.SetParameterValue("@rpt_args", atm.WorkingModel.Header.TicketNumber);         
        Stream stream = rptH.ExportToStream(CrystalDecisions.Shared.ExportFormatType.PortableDocFormat);         
        return File(stream, "application/pdf");

I'm currently getting a database login failure. Do I have my code setup correctly to perform the action I'm looking for? Any possible reason for the database login failure?

Thanks,

** Update **

I got it working through VS with the following code (The database login error was of result of a typo):

        ReportClass rptH = new ReportClass();
        rptH.FileName = Server.MapPath(Url.Content("~/app_data/whkinvc.rpt"));
        rptH.Load();

        rptH.SetDatabaseLogon(...);

        ParameterValues xyz = new ParameterValues();
        ParameterDiscreteValue pdv = new ParameterDiscreteValue();
        pdv.Value = atm.WorkingModel.Header.TicketNumber;

        xyz.Add(pdv);
        rptH.DataDefinition.ParameterFields["@rpt_args"].ApplyCurrentValues(xyz);
        Stream stream = rptH.ExportToStream(CrystalDecisions.Shared.ExportFormatType.PortableDocFormat);         
        return File(stream, "application/pdf"); 

I would like the output to go to a new tab or window. Currently it just replaces the current window.

Answer 1

I got it working through VS with the following code (The database login error was of result of a typo):

ReportClass rptH = new ReportClass();         
rptH.FileName = Server.MapPath(Url.Content("~/app_data/whkinvc.rpt"));         
rptH.Load();          
rptH.SetDatabaseLogon(...);          
ParameterValues xyz = new ParameterValues();         
ParameterDiscreteValue pdv = new ParameterDiscreteValue();         
pdv.Value = atm.WorkingModel.Header.TicketNumber;          
xyz.Add(pdv);         
rptH.DataDefinition.ParameterFields["@rpt_args"].ApplyCurrentValues(xyz);         
Stream stream = rptH.ExportToStream(CrystalDecisions.Shared.ExportFormatType.PortableDocFormat);                  
return File(stream, "application/pdf");  

Answer 2

In the past I've had to set the connection string for every table (or stored proc or whatever) in the report, and also in every table in every sub report.

For example:

(Suppose rd is an instance of ReportDocument, and cn is a preprepared instance of ConnectionInfo)

void SetupConnection(ReportDocument rd, ConnectionInfo cn)
{

    foreach (Table t in rd.database.Tables)
    {
        TableLoginInfo li = t.LogOnInfo;
        li.ConnectionInfo = cn;
        t.ApplyLogOnInfo(li);
        t.Location = t.Location;
    }
    if (!rd.IsSubReport) 
    {
         foreach (ReportDocument sr in rd.SubReports)
             SetupConnection(sr,cn);
    }
}

I realise some of this makes little sense, (eg t.Location = t.Location ). Its a while since I used it, but I believe that these were necessary for it to work properly.