[Crystal Report] 利用 IEnumerable 與Report 進行 Binding

利用WPF 的Crystal Report View 做Binding 時, 須要在其viewer control 中以method 形式進行設定. 正常情況下, WPF 於XAML 中不能直接叫用其method 更新, 故唯有透過 Behavior 進行叫用.

建立Behavior, 當Report 有修改時觸動事件, 再將更新的資料加到Control 中.

public class CrystalReportViewerBehaviour
    {
        public static readonly DependencyProperty ReportSourceProperty =
            DependencyProperty.RegisterAttached(
            "ReportSource",
            typeof(object),
            typeof(CrystalReportViewerBehaviour),
            new PropertyMetadata(ReportSourceChanged)
            );

        private static void ReportSourceChanged(
            DependencyObject d,
            DependencyPropertyChangedEventArgs e)
        {
            var crviewer = d as CrystalReportsViewer;
            if (crviewer != null)
            {
                crviewer.ViewerCore.ReportSource = e.NewValue;
                crviewer.ViewerCore.Zoom(BOApp.DataSources.Constant.CRYSTAL_REPORT.ZOOM.PAGE_WIDTH);
            }
        }

        public static void SetReportSource(DependencyObject target, object value)
        {
            target.SetValue(ReportSourceProperty, value);
        }

        public static object GetReportSource(DependencyObject target)
        {
            return target.GetValue(ReportSourceProperty);
        }
    }

叫用方法:

<UserControl xmlns:viewer="clr-namespace:SAPBusinessObjects.WPF.Viewer;assembly=SAPBusinessObjects.WPF.Viewer"
             xmlns:behaviours="clr-namespace:Behaviours"
             >
 <viewer:CrystalReportsViewer Grid.Row="1" Grid.Column="1" Grid.RowSpan="2" 
                                     behaviours:CrystalReportViewerBehaviour.ReportSource="{Binding Path=DataContext.ChequeReceiptReport, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=FrameworkElement}, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
                                     ShowCopyButton="False" ShowExportButton="False" ShowLogo="False" ShowOpenFileButton="False" ShowPrintButton="False" ShowSearchTextButton="False" ShowToggleSidePanelButton="False" ShowRefreshButton="False"
                                     ToggleSidePanel="None" 
                                     />
</UserControl>

而於View Model 中使用方法如下:

 private void ReloadReportDocument()
        {
            if (ChequeReceiptReport != null)
                ChequeReceiptReport.Dispose(); // Dispose file before update data source to prevent cannot load file issue.
            ChequeReceiptReport = new ChequeReceiptReport();
            ChequeReceiptReport.SetDataSource(SelectedChequeReceipts);
        }