87 lines
2.3 KiB
C#
87 lines
2.3 KiB
C#
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using System.ComponentModel;
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using System.Windows.Controls;
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using Microsoft.Web.WebView2.Core;
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using SSPCTester.UI.ViewModels;
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namespace SSPCTester.UI.Views;
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public partial class ReportView : UserControl
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{
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private ReportViewModel? _viewModel;
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public ReportView()
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{
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InitializeComponent();
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DataContextChanged += (_, e) =>
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{
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if (_viewModel != null)
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_viewModel.PropertyChanged -= ViewModel_PropertyChanged;
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_viewModel = e.NewValue as ReportViewModel;
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if (_viewModel != null)
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{
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_viewModel.PropertyChanged += ViewModel_PropertyChanged;
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NavigatePreview(_viewModel.PreviewSource);
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}
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else
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{
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NavigateBlank();
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}
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};
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Unloaded += (_, _) =>
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{
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if (_viewModel != null)
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_viewModel.PropertyChanged -= ViewModel_PropertyChanged;
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_viewModel = null;
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NavigateBlank();
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};
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}
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private void ViewModel_PropertyChanged(object? sender, PropertyChangedEventArgs e)
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{
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if (e.PropertyName == nameof(ReportViewModel.PreviewSource) && sender is ReportViewModel vm)
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NavigatePreview(vm.PreviewSource);
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}
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private void PdfPreview_CoreWebView2InitializationCompleted(
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object? sender,
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CoreWebView2InitializationCompletedEventArgs e)
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{
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if (e.IsSuccess) return;
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if (DataContext is ReportViewModel vm)
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vm.PreviewUnavailable("PDF 预览初始化失败。请确认已安装 Microsoft Edge WebView2 Runtime，或使用“打开文件夹”查看报告。");
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}
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private void NavigatePreview(Uri? source)
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{
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if (source == null)
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{
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NavigateBlank();
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return;
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}
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try
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{
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PdfPreview.Source = source;
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}
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catch
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{
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NavigateBlank();
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_viewModel?.PreviewUnavailable("PDF 预览加载失败。请使用“打开文件夹”查看报告。");
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}
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}
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private void NavigateBlank()
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{
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try
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{
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PdfPreview.Source = new Uri("about:blank");
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}
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catch
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{
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// WebView2 may not be initialized yet; leave it untouched.
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}
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}
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}
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