C# ListViewItem已选择双向绑定不起作用

我已经为我的应用程序创建了一个“DarkMode”主题，但是

列表视图项

的

已选择

绑定不起作用。当我选择一个或多个项目时，它们会按预期高亮显示（即MultiTrigger应用了正确的高亮显示颜色），因此ListView显然认为

IsSelected==True

。但是从未调用Setter，因此我的模型中的属性从未更新

如果我删除

x:Key=“RemoteComputerItem”

样式，它工作正常（即调用Setter并更新我的模型）。删除该样式中的所有触发器没有任何区别（我显然看不到高亮显示的项目，但仍然没有调用Setter）。因此，只剩下以下内容：

<ControlTemplate TargetType="{x:Type ListViewItem}">
    <Border x:Name="Bd">
        <GridViewRowPresenter HorizontalAlignment="{TemplateBinding HorizontalAlignment}" VerticalAlignment="{TemplateBinding VerticalAlignment}" />
    </Border>
</ControlTemplate>

暗模式主题的单独资源字典：

<ListView x:Name="ADComputers" Margin="0" Padding="0" Grid.Row="1" Grid.Column="2" 
          ItemsSource="{Binding SelectedItem.Computers, ElementName=ADTree, Mode=TwoWay}"
          SelectionMode="Multiple" ItemContainerStyle="{DynamicResource RemoteComputerItem}">
    <ListView.Resources>
        <Style TargetType="{x:Type ListViewItem}" BasedOn="{StaticResource RemoteComputerItem}">
            <Setter Property="IsSelected" Value="{Binding IsSelected}" />
            <Style.Triggers>
                <DataTrigger Binding="{Binding StatusText}" Value="Offline">
                    <Setter Property="Foreground" Value="Gray" />
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </ListView.Resources>
    <ListView.View>
        <GridView>
            <GridViewColumn Header="" Width="20">
                <GridViewColumn.CellTemplate>
                    <DataTemplate>
                        <Image Source="" />
                    </DataTemplate>
                </GridViewColumn.CellTemplate>
            </GridViewColumn>
            <GridViewColumn x:Name="Name" Width="120" DisplayMemberBinding="{Binding Name}">
                <GridViewColumn.Header>
                    <GridViewColumnHeader Content="Computer Name" util:SortOrderGlyph.IsSorted="False" util:SortOrderGlyph.SortDirection="True">
                        <i:Interaction.Triggers>
                            <i:EventTrigger EventName="Click">
                                <cal:ActionMessage MethodName="SortCol">
                                    <cal:Parameter Value="Name" />
                                    <cal:Parameter Value="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type GridViewColumnHeader}}}" />
                                </cal:ActionMessage>
                            </i:EventTrigger>
                        </i:Interaction.Triggers>
                    </GridViewColumnHeader>
                </GridViewColumn.Header>
            </GridViewColumn>

            <!-- More columns like above, removed to shorten -->

        </GridView>
    </ListView.View>
</ListView>

<Style x:Key="RemoteComputerItem" TargetType="{x:Type ListViewItem}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type ListViewItem}">
                <Border x:Name="Bd">
                    <GridViewRowPresenter HorizontalAlignment="{TemplateBinding HorizontalAlignment}" VerticalAlignment="{TemplateBinding VerticalAlignment}" />
                </Border>
                <ControlTemplate.Triggers>
                    <Trigger Property="IsMouseOver" Value="True">
                        <Setter Property="Background" TargetName="Bd">
                            <Setter.Value>
                                <SolidColorBrush Color="{DynamicResource ControlMouseOverColor}" />
                            </Setter.Value>
                        </Setter>
                    </Trigger>
                    <MultiTrigger>
                        <MultiTrigger.Conditions>
                            <Condition Property="Selector.IsSelectionActive" Value="False" />
                            <Condition Property="IsSelected" Value="True" />
                        </MultiTrigger.Conditions>
                        <Setter Property="Background" TargetName="Bd">
                            <Setter.Value>
                                <SolidColorBrush Color="{DynamicResource SelectedBackgroundColor}" />
                            </Setter.Value>
                        </Setter>
                    </MultiTrigger>
                    <MultiTrigger>
                        <MultiTrigger.Conditions>
                            <Condition Property="Selector.IsSelectionActive" Value="True" />
                            <Condition Property="IsSelected" Value="True" />
                        </MultiTrigger.Conditions>
                        <Setter Property="Background" TargetName="Bd">
                            <Setter.Value>
                                <SolidColorBrush Color="{DynamicResource SelectedBackgroundColor}" />
                            </Setter.Value>
                        </Setter>
                    </MultiTrigger>
                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

树视图绑定到

ADRoot.Children

：

class ADTreeViewModel : OUModel
{
    public OUModel ADRoot { get; set; } = new OUModel(null, false);
}

class OUModel : PropertyChangedBase, ITreeViewItemViewModel
{
    // TreeView is bound to this property, which holds a collection of more OUModel objects
    public BindableCollection<ITreeViewItemViewModel> Children { get; set; } = new BindableCollection<ITreeViewItemViewModel>();

    // The ListView's ItemSource is bound to ADTree.SelectedItem.Computers which is this property
    public List<RemoteComputer> Computers
    {
        get { return computers; }
        set { computers = value; NotifyOfPropertyChange(); } 
    }

// PropertyChangedBase is from Caliburn.Micro
class RemoteComputer : PropertyChangedBase
{

    // All other properties in this class are being displayed correctly in the ListView, so the DataContext is correct E.g.:
    public string Name { get; set; }

    private bool isSelected = false;

    // The ListViewItem's IsSelected property is bound to this
    public bool IsSelected
    {
        get { return isSelected; }
        set
        {
            isSelected = value;
            NotifyOfPropertyChange(); // Caliburn.Micro gets the property name itself

            // I've also tried adding the following
            NotifyOfPropertyChange(() => Parent.Children);
            NotifyOfPropertyChange(() => Parent);
        }
    }
}

class-ADTreeViewModel:OUModel
{
public-OUModel-ADRoot{get；set；}=new-OUModel（null，false）；
}
类OUModel:PropertyChangedBase，ITreeViewItemViewModel
{
//TreeView绑定到此属性，该属性包含更多OUModel对象的集合
public BindableCollection子项{get；set；}=new BindableCollection（）；
//ListView的ItemSource绑定到ADTree.SelectedItem.Computers，这是此属性
公共列表计算机
{
获取{返回计算机；}
设置{computers=value；NotifyOfPropertyChange（）；}
}
//PropertyChangedBase来自Caliburn.Micro
类RemoteComputer:PropertyChangedBase
{
//此类中的所有其他属性都在ListView中正确显示，因此DataContext是正确的，例如：
公共字符串名称{get；set；}
private bool isSelected=假；
//ListViewItem的IsSelected属性绑定到此
公选学校
{
获取{return isSelected；}
设置
{
isSelected=值；
NotifyOfPropertyChange（）；//Caliburn.Micro获取属性名称本身
//我还尝试添加以下内容
NotifyOfPropertyChange（（）=>Parent.Children）；
NotifyOfPropertyChange（（）=>父级）；
}
}
}

以下是所选项目的Live Property Explorer：

---

是错误的。值可以是True或False且不绑定。如果您使用的是行为：那么请尝试{Binding DataContext.IsSelected}谢谢，我刚刚尝试了

{Binding DataContext.IsSelected}

和

{Binding RelativeSource={RelativeSource Self}，Path=DataContext.IsSelected}

但两者都没有任何区别。您在输出窗口中看到绑定错误吗？请尝试从该信息开始工作。有时，除非您在元素中设置了相同的属性，否则设置程序不会启动。@Prateek在其第一条注释中说的是错误的。样式设置程序的值当然可以是绑定。

是有效的d表达式，前提是ListViewItem的当前DataContext中存在IsSelected属性。@Pratekshrivastava输出窗口中没有绑定错误。我已使用Live属性查看器选择ListViewItem的DataContext，以查看IsSelected属性是否更新（我在选择项目后刷新Live属性窗口），我不仅仅依赖于setter中的断点。

class ADTreeViewModel : OUModel
{
    public OUModel ADRoot { get; set; } = new OUModel(null, false);
}

class OUModel : PropertyChangedBase, ITreeViewItemViewModel
{
    // TreeView is bound to this property, which holds a collection of more OUModel objects
    public BindableCollection<ITreeViewItemViewModel> Children { get; set; } = new BindableCollection<ITreeViewItemViewModel>();

    // The ListView's ItemSource is bound to ADTree.SelectedItem.Computers which is this property
    public List<RemoteComputer> Computers
    {
        get { return computers; }
        set { computers = value; NotifyOfPropertyChange(); } 
    }

// PropertyChangedBase is from Caliburn.Micro
class RemoteComputer : PropertyChangedBase
{

    // All other properties in this class are being displayed correctly in the ListView, so the DataContext is correct E.g.:
    public string Name { get; set; }

    private bool isSelected = false;

    // The ListViewItem's IsSelected property is bound to this
    public bool IsSelected
    {
        get { return isSelected; }
        set
        {
            isSelected = value;
            NotifyOfPropertyChange(); // Caliburn.Micro gets the property name itself

            // I've also tried adding the following
            NotifyOfPropertyChange(() => Parent.Children);
            NotifyOfPropertyChange(() => Parent);
        }
    }
}