3rdpartylibs/fastreports.wpf/Demos/WPF/Main/DemoWindow.xaml.cs

using FastReport;
using FastReport.Utils;
using System.Windows;

namespace WpfDemo
{
    public partial class DemoWindow : Window
    {
        private Report report;

        public string Version => Config.Version;

        public DemoReports DemoReports { get; }

        public DemoWindow()
        {
            InitializeComponent();

            // the designer will use embedded preview (same window as the designer)
            Config.DesignerSettings.EmbeddedPreview = true;
            // show how fast is FastReport
            Config.ReportSettings.ShowPerformance = true;
            // override these to not use standard progress form
            Config.ReportSettings.StartProgress += (s, e) => { };
            Config.ReportSettings.Progress += (s, e) => previewControl.ShowStatus(e.Message);
            Config.ReportSettings.FinishProgress += (s, e) => { };
            // warm up the Roslyn (used in net60 target)
            Config.CompilerWarmup();

            // these features are available in net6.0-windows target
#if NETCOREAPP
            // do not compile a report if it has no user script (works faster)
            Config.CompilerSettings.ReflectionEmitCompiler = true;
            // use RoslynPad as a code editor
            FastReport.WPF.RoslynPad.SyntaxEditor.Register();
#endif

            // shared folder for Map object
            FastReport.Map.MapObject.ShapefileFolder = Folders.MapsFolder;

            // populate reports list
            DemoReports = new DemoReports(Folders.ReportsFolder + "reports.xml");
            this.DataContext = DemoReports;

            this.Closing += (s, e) =>
            {
                if (previewControl.IsAsyncReportRunning)
                {
                    // if async report is running, abort the report. Do not close the window
                    previewControl.Report.Abort();
                    e.Cancel = true;
                    return;
                }
                DisposeReport();
            };
        }

        private void reportsTree_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)
        {
            // previous report is not finished yet
            if (previewControl.IsAsyncReportRunning)
                return;

            var reportItem = reportsTree.SelectedItem as ReportItem;
            if (reportItem != null)
            {
                // in case we are in the UI layout phase, we need this call to be dispatched (case: expand the "Dialogs" category => Invalid Op exception)
                Dispatcher.BeginInvoke(() => RunReport(Folders.ReportsFolder + reportItem.FileName));
            }
        }

        private void RunReport(string fileName)
        {
            // dispose previous report
            DisposeReport();

            report = new Report();
            report.Load(fileName);
            SampleData.RegisterData(report);

            // show description
            description.SetDescription(report.ReportInfo.Description);
            
            // prepare report async way (you may use preview while report is preparing). A bit flickering though
            report.PrepareAsync(previewControl);
            
            // non-async way (prepare then show):
            //report.WpfPreview = previewControl;
            //report.Show();
        }

        private void DisposeReport()
        {
            // disposing a report may be necessary if it has dialog forms inside. These forms may prevent WPF app to close
            report?.Dispose();
            report = null;
        }
    }
}