[英]WPF MVVM TreeView IsSelected binding not working
我有一個問題,我看不清為什么它不起作用。 我有一個帶有轉換器的3層樹狀視圖,它使我可以將兩個第一層倒置。 在此TreeView上,我嘗試使用IsSelected屬性,但是由於某種原因,我不知道在ViewModel中永遠不會調用它。
這是xaml。
<TreeView Margin="0,0,0,0" Padding="0,7,0,7" BorderBrush="{x:Null}" Background="#FFF8FAFB" Name="BusinessCaseTreeView">
<TreeView.ItemContainerStyle>
<Style TargetType="{x:Type TreeViewItem}">
<Setter Property="IsSelected" Value="{Binding IsSelected, Mode=TwoWay}" />
</Style>
</TreeView.ItemContainerStyle>
<TreeView.ItemsSource>
<MultiBinding Converter="{converter:BusinessCasesConverter}">
<Binding Path="BusinessCases"></Binding>
<Binding Path="GroupByCreditor"></Binding>
</MultiBinding>
</TreeView.ItemsSource>
<TreeView.Resources>
<HierarchicalDataTemplate DataType="{x:Type converter:BusinessCaseTreeViewableFirst}" ItemsSource="{Binding SecondLevel}">
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding FirstLevel.Id}" Margin="10,0,0,0" Foreground="#FF03577A" FontWeight="Bold" />
<TextBlock Text="-" Margin="5,0,0,0" Foreground="#FF03577A" FontWeight="Bold"/>
<TextBlock Text="{Binding FirstLevel.FirstName}" Margin="5,0,0,0" FontWeight="Bold" Foreground="#FF03577A" />
<TextBlock Text="{Binding FirstLevel.LastName}" Margin="5,0,0,0" FontWeight="Bold" Foreground="#FF03577A" />
</StackPanel>
</HierarchicalDataTemplate>
<HierarchicalDataTemplate DataType="{x:Type converter:BusinessCaseTreeViewModelSecond}" ItemsSource="{Binding BusinessCases}">
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding SecondLevel.Id}" Margin="10,0,0,0" Foreground="#FF095A7C" FontWeight="Bold" />
<TextBlock Text="-" Margin="5,0,0,0" Foreground="#FF095A7C" FontWeight="Bold"/>
<TextBlock Text="{Binding SecondLevel.FirstName}" Margin="5,0,0,0" FontWeight="Bold" Foreground="#FF095A7C" />
<TextBlock Text="{Binding SecondLevel.LastName}" Margin="5,0,0,0" FontWeight="Bold" Foreground="#FF095A7C" />
</StackPanel>
</HierarchicalDataTemplate>
<DataTemplate DataType="{x:Type business:BusinessCase}">
<StackPanel Orientation="Horizontal">
<TextBlock Text="(" Margin="10,0,0,0" Foreground="#FF0B89BD" FontWeight="Bold" />
<TextBlock Text="{Binding Id}" Margin="1,0,0,0" Foreground="#FF0B89BD" FontWeight="Bold" />
<TextBlock Text=")" Margin="2,0,0,0" Foreground="#FF0B89BD" FontWeight="Bold"/>
<TextBlock Text="{Binding CreationDate, StringFormat='{}{0:dd MMMM yyyy}'}" Margin="5,0,0,0" Foreground="#FF0B89BD" />
<TextBlock Text="-" Margin="5,0,0,0" Foreground="#FF0B89BD" FontWeight="Bold"/>
<TextBlock Text="{Binding ClosureDate, StringFormat={}{0:dd MMMM yyyy}}" Margin="5,0,0,0" Foreground="#FF0B89BD" />
</StackPanel>
</DataTemplate>
</TreeView.Resources>
</TreeView>
我從未到達ViewModel中的IsSelected setter。 如果您有任何想法,歡迎您。
提前致謝
它可能與您在ItemContainerStyle
。 另外,請確保IsSelected
在所有添加到樹視圖的類型中
嘗試這個:
<TreeView>
<TreeView.Resources>
<Style TargetType="{x:Type TreeViewItem}">
<Setter Property="IsSelected"
Value="{Binding IsSelected, Mode=TwoWay}" />
</Style>
</TreeView.Resources>
.....
</TreeView>
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