1957717 - How to "clear" the Crystal Reports WPF and viewer

• A Crystal Report is sent to the viewer.
• What API should be used to clear out the first report, before sending the next report to the viewer?

• SAP Crystal Reports, developer version for Microsoft Visual Studio
• Microsoft Visual Studio (2010 / 2012)

• The WPF viewer does not have any exposed APIs that would clear the viewer.

• Work-Around:

1. Create a blank.rpt report with nothing in it, no database connection.
2. Save the report with the option "Saved data" enabled.
3. Use the following code:

private void button1_Click(object sender, RoutedEventArgs e)
{
   // Button1 to view the first report    
   CrystalDecisions.CrystalReports.Engine.ReportDocument doc = new CrystalDecisions.CrystalReports.Engine.ReportDocument();

    doc.Load(@"c:\reports\formulas1.rpt");
    crystalReportsViewer2.ViewerCore.ReportSource = doc;
    crystalReportsViewer2.ViewerCore.Visibility = Visibility.Visible;

}

private void button2_Click(object sender, RoutedEventArgs e)
{
    // Button2 to close and display the blank report, thus simulating an empty viewer
    CrystalDecisions.CrystalReports.Engine.ReportDocument doc = new CrystalDecisions.CrystalReports.Engine.ReportDocument();
    doc.ReportClientDocument.Close();

    doc.Load("C:\\reports\\blank1.rpt");
    crystalReportsViewer2.ViewerCore.ReportSource = doc;
}

CRVS CR4VS 2012 2010 NET VS C# empty remove blank out , KBA , BI-DEV-NET-SDK , .NET SDK / COM SDK , How To

SAP Crystal Reports, developer version for Microsoft Visual Studio