如何使用基于.Net类属性的值自动更新WPF TreeViewItems？
早上好。
我有一个类，其中包含从InotifyPropertyChange派生的数据。数据来自后台线程，后台线程在某些位置搜索具有特定扩展名的文件。该类的公共属性通过更新单独线程中的数据来响应事件OnPropertyChange。此外，在XAML TreeView中描述了基于HierarhicalDataTemplates。模板内的每个TextBlock都提供了ItemsSource =“{Binding FoundFilePaths，Mode = OneWay，NotifyOnTargetUpdated = True}”。
<TreeView x:Name="FoundFiles_TreeView" Opacity="15" Background="White" BorderThickness="5" FontFamily="Arial" Margin="0,0,0,0" RenderTransformOrigin="0.5,0.5" VerticalAlignment="Top" Height="360" FontWeight="Bold" Foreground="#FF539DBE" TargetUpdated="FoundFiles_TreeView_TargetUpdated">
<TreeView.ItemContainerStyle >
<Style TargetType="{x:Type TreeViewItem}">
<Setter Property="TreeViewItem.Tag" Value="InfoNode" />
<Setter Property="IsSelected" Value="{Binding IsSelected, Mode=TwoWay}" />
<Setter Property="Foreground" Value="Brown"/>
<Style.Triggers>
<Trigger Property="IsMouseCaptured" Value="True">
<Setter Property="IsSelected" Value="True"/>
</Trigger>
</Style.Triggers>
</Style>
</TreeView.ItemContainerStyle>
<TreeView.Resources>
<HierarchicalDataTemplate DataType = "{x:Type lightvedo:FilesInfoStore}" ItemsSource="{Binding FoundFilePaths, Mode=OneWay, NotifyOnTargetUpdated=True}">
<!--Здесь указываются узлы дерева-->
<StackPanel x:Name ="TreeNodeStackPanel" Orientation="Horizontal">
<TextBlock Margin="5,5,5,5" TargetUpdated="TextBlockExtensions_TargetUpdated">
<TextBlock.Text>
<MultiBinding StringFormat="Files with Extension {0}">
<Binding Path="FileExtension"/>
</MultiBinding>
</TextBlock.Text>
</TextBlock>
<Button x:Name="OpenFolderForThisFiles" Click="OnOpenFolderForThisFiles_Click" Margin="5, 3, 5, 3" Width="22" Background="Transparent" BorderBrush="Transparent" BorderThickness="0.5">
<Image Source="imagesFolder.png" Height="16" Width="20" >
</Image>
</Button>
</StackPanel>
</HierarchicalDataTemplate>
<HierarchicalDataTemplate DataType="{x:Type lightvedo:FilePathsStore}">
<TextBlock Text="{Binding FilePaths, Mode=OneWay, NotifyOnTargetUpdated=True}" TargetUpdated="OnTreeViewNodeChildren_Update" />
</HierarchicalDataTemplate>
</TreeView.Resources>
<TreeView.RenderTransform>
<TransformGroup>
<ScaleTransform/>
<SkewTransform AngleX="-0.083"/>
<RotateTransform/>
<TranslateTransform X="-0.249"/>
</TransformGroup>
</TreeView.RenderTransform>
<TreeView.BorderBrush>
<LinearGradientBrush EndPoint="1,0.5" StartPoint="0,0.5">
<GradientStop Color="#FF74591F" Offset="0" />
<GradientStop Color="#FF9F7721" Offset="1" />
<GradientStop Color="#FFD9B972" Offset="0.49" />
</LinearGradientBrush>
</TreeView.BorderBrush>
</TreeView>
没有找到相关结果
已邀请:
2 个回复
完趣镐
。 相反，每次更新路径集合时，确保在父实体上引发事件（使用传递给处理程序的传递适当的属性名称），或者使导航属性为的实现。芳菱挨啡
public delegate void RefreshTreeViewItemsDelegate(); Dispatcher.FromThread(_guiThread).BeginInvoke(DispatcherPriority.Render, new RefreshTreeViewItemsDelegate (RefreshTreeItems)) // Some code ommited private void RefreshTreeItems() { _popupWindow.FoundFiles_TreeView.ItemsSource = _treeViewNodesItems; _popupWindow.FoundFiles_TreeView.Items.Refresh(); }