Question

Im trying to load a xml file into a dataset and generate crystal report with loaded data.

im using Crystal Reports WPF Application for the project.

public partial class Window1 : Window
{
    public Window1()
    {
        InitializeComponent();
        reportViewer.Owner = this;

        DataSet dset = new DataSet1();

        DataSet reportData = new DataSet();
        reportData.ReadXml("http://192.168.1.10/test/persons.xml");

        dset.Tables[0].Merge(reportData.Tables[0]); 


        ReportDocument report = null;
        report = new CrystalReport1();
        report.SetDataSource(dset.Tables[0]);
        reportViewer.ViewerCore.ReportSource = report;
    }

}

This working fine and my question is how to move download xml and set report codes to a different event to load report after the application is shown?

Regards

Answer 1

Here is the Window Lifetime Management events: (MSDN)

• Activated
• Closed
• Closing
• Deactivated
• SourceInitialized

I believe Activated event is what you need. Considering that Activated event fires not only when a window opened first time but also when ALT+TAB switches and so on so to filter out first windo opening from other Activated events just use boolean flag setting it to true when first time Activated event was handled:

    bool firstActivateAlreadyHandled = false;
    protected override void OnActivated(EventArgs e)
    {
        base.OnActivated(e);

        if (!this.firstActivateAlreadyHandled)
        {
             // your code here
             this.firstActivateAlreadyHandled = true;
        }
    }