here is the simple code that i have created to print the SSRS report in dynamics ax 2012 from different scenarios.

How to print the SSRS report in dynamics ax 2012 from code.

    SrsReportRun srsReportRun;

    // initiate the report.
    srsReportRun = new SrsReportRun ("InventTruckTransactionReport.PrecisionDesign1");
    srsReportRun.init();
    srsReportRun.reportCaption("InventTruckTransactionReport.PrecisionDesign1");
    // set parameters name, value.
    srsReportRun.reportParameter("TruckTransDS_JournalId").value("000161_070");
    // suppress the dialog
    srsReportRun.showDialog(false);

    if( srsReportRun )
    {
        // run the report 
        srsReportRun.executeReport();
    }

How to save the SSRS report to PDF/HTML through code in dynamics ax 2012.

    SrsReportRun srsReportRun;

    srsReportRun = new SrsReportRun("InventTruckTransactionReport.PrecisionDesign1");

    srsReportRun.init();
    srsReportRun.reportCaption("InventTruckTransactionReport.PrecisionDesign1");
    srsReportRun.reportParameter("TruckTransDS_JournalId").value("000161_070");
    srsReportRun.showDialog(false);

    // Print to a file named ReportExample in HTML/PDF format.
    srsReportRun.printDestinationSettings().printMediumType(SRSPrintMediumType::File);
    srsReportRun.printDestinationSettings().fileFormat(SRSReportFileFormat::PDF);
    srsReportRun.printDestinationSettings().overwriteFile(true);
    srsReportRun.printDestinationSettings().fileName(@"C:\InventTruckTransactionReport.pdf");

    if( srsReportRun )
    {
        srsReportRun.executeReport();
    }