1403341 - How to export reports in multiple threads using the Crystal Reports .NET RAS SDK

How to export reports to PDF in multiple threads using the Crystal Reports .NET  RAS SDK

sample code :

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Text;
using System.Windows.Forms;
using System.Threading;

using CrystalDecisions.ReportAppServer.ClientDoc;
using CrystalDecisions.ReportAppServer.DataDefModel;
using CrystalDecisions.ReportAppServer.ReportDefModel;
using CrystalDecisions.ReportAppServer.CommonObjectModel;

namespace CS08_Export_thread_param_ras_unmgd
{
    public partial class Form1 : Form
    {
        private ReportClientDocument m_boReportClientDocument;
        private string _rptFile;
        private ByteArray m_ByteArray;

        private ManualResetEvent[] _reportEventsArray;
        private ManualResetEvent _actionAborted;
        private ManualResetEvent _actionFinished;

        public Form1()
        {
            _actionFinished = new ManualResetEvent(false);
            _actionAborted = new ManualResetEvent(false);
            _reportEventsArray = new ManualResetEvent[2];

            _reportEventsArray[0] = _actionAborted;
            _reportEventsArray[1] = _actionFinished;
       
            InitializeComponent();
            OpenReport();

            // if necessary set parameters
            SetReportParametersValues();

            // Export report to PDF
            Export();

        }

        //---------------------------------------------------------------------------------
        //                       OPEN THE REPORT
        //---------------------------------------------------------------------------------
        private void OpenReport()
        {

            //--------------------------------------------------------------------------------
            //make sure that you change the server setting of the RAS server to this folder
            
            _rptFile = "C:\\Reports\Report.rpt";
           
            try
            {
                m_boReportClientDocument = new ReportClientDocumentClass();

                var path = (object)_rptFile;
                m_boReportClientDocument.Open(ref path, (int) CdReportClientDocumentOpenOptionsEnum.cdReportClientDocumentOpenAsReadOnly );
            }
            catch (Exception e)
            {
                Console.WriteLine("ERROR in OpenReport(): " + e.Message);
            }
        }

                
        //---------------------------------------------------------------------------------
        //                       SETTING PARAMETERS VALUES METHODS
        //---------------------------------------------------------------------------------

        // Setting each parameter field from the report with a value.
        private void SetReportParametersValues()
        {
            m_boReportClientDocument.DataDefController.ParameterFieldController.SetCurrentValue("", "param1", "ParameterValue1");
            m_boReportClientDocument.DataDefController.ParameterFieldController.SetCurrentValue("", "param2", "ParameterValue2");
        }

        //---------------------------------------------------------------------------------
        //                     RUNNING THE REPORT Export METHODS
        //---------------------------------------------------------------------------------

        // Running the report in a different threads.
        private void Export()
        {
            var thread = new Thread(ExportToPDF);

            thread.Start();
            WaitForThread(thread);
        }

        private void ExportToPDF()
        {

            try
            {

                // Export the report to the required format:
                m_ByteArray = m_boReportClientDocument.PrintOutputController.Export(CrReportExportFormatEnum.crReportExportFormatPDF, 0);

                string exportPath = "C:\\test.pdf";

                m_ByteArray.Save(exportPath, true);

                // Notify on finished
                _actionFinished.Set();
            }

            catch (Exception e)
            {
                Console.WriteLine("ERROR in ExportToFile(): " + e.Message);
                _actionAborted.Set();
            }
        }

        private void WaitForThread(Thread thread)
        {
            // Wait for the thread to finish or for abort event
            var index = WaitHandle.WaitAny(_reportEventsArray);

            if (index == 0) //aborted
            {
                // Stop the thread execution
                thread.Abort();
                throw new Exception("CrystalReport was aborted.");
            }
            _actionFinished.Reset();
        }
    }
}

How export reports multiple threads  Crystal Reports .NET  RAS SDK , KBA , BI-DEV-NET , BI Software Development Kits (SDKs) - .NET or Other , How To