3rdpartylibs/fastreports.wpf/Demos/WPF/CustomPreview/MainWindow.xaml.cs

using FastReport;
using System.IO;
using System.Windows;

namespace CustomPreview
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            PopulateReportsList();
        }

        private void PopulateReportsList()
        {
            var files = Directory.GetFiles("Reports", "*.frx");
            foreach (var file in files)
            {
                reportsList.Items.Add(Path.GetFileName(file));
            }
            if (reportsList.Items.Count > 0)
                reportsList.SelectedIndex = 0;
        }

        private void reportsList_SelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
        {
            string reportFile = reportsList.SelectedItem as string;
            if (reportFile != null)
            {
                var report = new Report();
                report.Load(Path.Combine("Reports", reportFile));
                report.WpfPreview = previewControl;
                report.Show();
            }
        }

        private void ExportToPDF_Click(object sender, RoutedEventArgs e)
        {
            var export = new FastReport.Export.Pdf.PDFExport();
            export.Export(previewControl.Report);
        }
    }
}