new thread on windows MDI form load event ...

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I have a windows application in which i am using a Crystal report . First report of the application is very slow . So i adopted a trick to preload the crystal engine on MDI form load event using a new thread .

C#

public TopAccoutsMDI(Form splashScreen)
        {
   InitialiseCrystalEngines();
}

private void InitialiseCrystalEngines()
        {            
            
            Thread thCRLoadAssemblies = new Thread(new ThreadStart(LoadCrystalAssemblies));  
            thCRLoadAssemblies.Priority = ThreadPriority.BelowNormal;
            thCRLoadAssemblies.IsBackground = true;
            thCRLoadAssemblies.Start();                               
            objSplashScreen.Refresh(); 
        }


 private void LoadCrystalAssemblies()
        {
            DataSet dtReportdataset = new DataSet() ;
            ReportDocument cryRpt = Reports.TRReportDocument.GetReportDocument("DummyReport");
            cryRpt.SetDataSource(dtReportdataset);
            crystalReportViewer1.ReportSource = cryRpt;
            crystalReportViewer1.Refresh();
        }

However , it returns an error at line "crystalReportViewer1.ReportSource = cryRpt;" like "{"Cross-thread operation not valid: Control '' accessed from a thread other than the thread it was created on."}" on execution . please kindly suggest me how to get this work without error please advice me. thanks

Posted 3-Apr-14 5:22am

blrsimon

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Dave Kreskowiak · Answer 1 · 2014-04-03T06:05:00

That's not going to work. You cannot put ANY control manipulating code on anything other that the startup (UI) thread.

I don't know how you're going to get this to work in the background at all because everything you're doing is control related and must stay on the UI thread.

I don't know Crystal Reports well enough at all, but you might want to try and find something in the object model for CR that can preload a report without telling the control to do it or binding the control to a report until after it's loaded.