我正在使用一個已有的MVVM項目,直到現在我都做得很好。我有一個treeView代碼,我想 按下時釋放節點。換句話說,今天如果我點擊任何節點,它不能再選擇(直到你點擊另一個節點)。我希望能夠根據需要多次點擊同一個節點。如果我雙擊節點,我有「IsExpended」屬性,它會轉到此代碼部分。我看不出哪裏是雙擊綁定,只需一次點擊綁定...MVVM Treeview點擊節點
這裏的XAML
<UserControl x:Class="Envitech.Setup.Presentation.Views.TreeViewViews.StationTree" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:behaviour="clr-namespace:Envitech.Setup.Presentation.Extensions;assembly=Envitech.Setup.Presentation" xmlns:nodes="clr-namespace:Envitech.Setup.Presentation.ViewModels.TreeViewViewModels.Nodes" mc:Ignorable="d" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" d:DesignHeight="226" d:DesignWidth="227" xmlns:ml="clr-namespace:Envitech.Setup.Presentation.ml_resources">
<TreeView Margin="10 0 10 20" ItemsSource="{Binding Path=Root.Children}" VirtualizingStackPanel.IsVirtualizing="True" VirtualizingStackPanel.VirtualizationMode="Recycling">
<TreeView.ItemContainerStyle>
<Style TargetType="{x:Type TreeViewItem}">
<Setter Property="IsSelected" Value="{Binding Path=IsSelected, Mode=TwoWay}"/>
<Setter Property="IsExpanded" Value="{Binding Path=IsExpanded, Mode=TwoWay}" />
</Style>
</TreeView.ItemContainerStyle>
<TreeView.Resources>
<Style TargetType="{x:Type TreeViewItem}">
<Setter Property="Background" Value="Transparent" />
<Setter Property="HorizontalContentAlignment" Value="{Binding Path=HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" />
<Setter Property="VerticalContentAlignment" Value="{Binding Path=VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}" />
<Setter Property="Padding" Value="1,0,0,0" />
<Setter Property="IsExpanded" Value="{Binding IsExpanded, Mode=TwoWay}" />
<Setter Property="IsSelected" Value="{Binding IsSelected, Mode=TwoWay}" />
<Setter Property="behaviour:TreeViewItemBehavior.IsBroughtIntoViewWhenSelected" Value="True" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type TreeViewItem}">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition MinWidth="19" Width="Auto" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition />
</Grid.RowDefinitions>
<ToggleButton x:Name="Expander" IsChecked="{Binding Path=IsExpanded, RelativeSource={RelativeSource TemplatedParent}}" ClickMode="Press" />
<Border Grid.Column="1" x:Name="Selection_Border" Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}">
<ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" x:Name="PART_Header" ContentSource="Header" />
</Border>
<ItemsPresenter Grid.Column="1" Grid.ColumnSpan="2" Grid.Row="1" x:Name="ItemsHost" />
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsExpanded" Value="false">
<Setter Property="Visibility" Value="Collapsed" TargetName="ItemsHost" />
</Trigger>
<Trigger Property="HasItems" Value="false">
<Setter Property="Visibility" Value="Hidden" TargetName="Expander" />
</Trigger>
<Trigger Property="IsSelected" Value="true">
<Setter Property="Background" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}" TargetName="Selection_Border" />
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}" />
</Trigger>
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsSelected" Value="true" />
<Condition Property="IsSelectionActive" Value="false" />
</MultiTrigger.Conditions>
<Setter Property="Background" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}" TargetName="Selection_Border" />
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}" />
</MultiTrigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<!-- Style for the ToggleButton control used to expand/collapse a TreeViewItem control -->
<Style TargetType="{x:Type ToggleButton}">
<Setter Property="Focusable" Value="False" />
<Setter Property="Width" Value="19" />
<Setter Property="Height" Value="13" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ToggleButton}">
<Border Width="19" Height="13" Background="#00FFFFFF" x:Name="Border">
<Border Width="9" Height="9" x:Name="Border1" SnapsToDevicePixels="True" BorderBrush="#FF9495A2" BorderThickness="1,1,1,1" CornerRadius="1,1,1,1">
<Border.Background>
<LinearGradientBrush StartPoint="0,0" EndPoint="1,1">
<GradientStop Color="#FFFFFFFF" Offset="0.4" />
<GradientStop Color="#FFC6CEDA" Offset="1" />
</LinearGradientBrush>
</Border.Background>
<Path Fill="#FF000000" Margin="1,1,1,1" x:Name="ExpandPath" Data="M0,2L0,3 2,3 2,5 3,5 3,3 5,3 5,2 3,2 3,0 2,0 2,2z" />
</Border>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsChecked" Value="True">
<Setter Property="Data" Value="M0,2L0,3 5,3 5,2z" TargetName="ExpandPath" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<DataTemplate DataType="{x:Type nodes:MonitorNode}">
<StackPanel Orientation="Horizontal" Margin="0 2 0 0">
<Image Source="{Binding ImageSource}" Width="16" Height="16" Margin="0 0 3 0" />
<TextBlock Text="{x:Static ml:MultiLang._157}" x:Name="ML_0048" />
<TextBlock Text="{Binding ID}" />
<TextBlock Text="{x:Static ml:MultiLang._158}" x:Name="ML_0050" />
<TextBlock Text="{Binding Name}" />
</StackPanel>
</DataTemplate>
<HierarchicalDataTemplate DataType="{x:Type nodes:StationNode}" ItemsSource="{Binding Children}">
<StackPanel Orientation="Horizontal" Margin="0 2 0 0">
<StackPanel.ContextMenu>
<ContextMenu HasDropShadow="True">
<MenuItem Header="{x:Static ml:MultiLang._160}" Command="{Binding CopyMonitorsCommand}" x:Name="ML_0055" />
<MenuItem Header="{x:Static ml:MultiLang._159}" Command="{Binding PasteMonitorsCommand}" x:Name="ML_0056" />
<MenuItem Header="{x:Static ml:MultiLang._162}" Command="{Binding CopyStationsCommand}" x:Name="ML_0057" />
<MenuItem Header="{x:Static ml:MultiLang._161}" Command="{Binding PasteStationsCommand}" x:Name="ML_0058" />
</ContextMenu>
</StackPanel.ContextMenu>
<Image Source="{Binding ImageSource}" Width="16" Height="16" Margin="0 0 3 0" />
<TextBlock Text="{x:Static ml:MultiLang._157}" x:Name="ML_0060" />
<TextBlock Text="{Binding ID}" />
<TextBlock Text="{x:Static ml:MultiLang._158}" x:Name="ML_0062" />
<TextBlock Text="{Binding Name}" />
</StackPanel>
</HierarchicalDataTemplate>
<HierarchicalDataTemplate DataType="{x:Type nodes:FilteringNode}" ItemsSource="{Binding Children}">
<StackPanel Orientation="Horizontal" Margin="0 2 0 0">
<Image Source="{Binding ImageSource}" Width="16" Height="16" Margin="0 0 3 0" />
<TextBlock Text="{Binding Name}" />
</StackPanel>
</HierarchicalDataTemplate>
</TreeView.Resources>
</TreeView>
</UserControl>
謝謝
非常感謝柯蒂斯。你是完全正確的,但我該怎麼做?我尋找雙擊處理,並找不到它。如果我將看到它,我會知道如何做單擊... –
我已經添加了一個代碼示例到我原來的答案,以處理樹視圖項目上的雙擊事件。 – Curtis
謝謝柯蒂斯。它不適合我。你能告訴我在我的xaml文件中的雙擊事件或選定的項目事件嗎?我不明白是什麼使它工作... –