C# 将动态automationID绑定到ListView中的每个ListViewItem

在我公司的当前项目中，我正在尝试为WPF应用程序中的每个UI元素设置自动化ID

在ListView中有几个ListViewItems，我希望通过AutomationID可以访问它们。因此，我试图为ListView中的每个ListViewItem设置一个automationID，它看起来像“dataitem1”、“dataitem2”、“dataitem3”等等

以下是我如何使用XAML代码获得的：

<ListView IsEnabled="{Binding TestSelectorEnabled}" x:Name="ListView1" DataContext="{Binding TestsViewModel.TestsDataTable}" ItemsSource="{Binding TestsViewModel.TestsDataTable}" SelectedValue="{Binding TestsViewModel.SelectedTest}" SelectedValuePath="TestName" Height="180" View="{Binding TestsViewModel.GridView}"  TabIndex="0" MinWidth="1" Focusable="False">
            <ListView.ItemContainerStyle>
                <Style TargetType="ListViewItem">
                    <Setter Property="AutomationProperties.AutomationId" Value="{Binding TestsViewModel.ListItemCounter, StringFormat='dataitem{}{0}'}"/>
                </Style>
            </ListView.ItemContainerStyle>
</ListView>

<ListView IsEnabled="{Binding TestSelectorEnabled}" x:Name="ListView1"  ItemsSource="{Binding TestsDataTable}" SelectedValue="{Binding SelectedTest}" SelectedValuePath="TestName" Height="180" View="{Binding GridView}"  TabIndex="0" MinWidth="1" Focusable="False">
            <ListView.ItemContainerStyle>
                <Style TargetType="ListViewItem">
                    <Setter Property="AutomationProperties.AutomationId" Value="{Binding Path=DataContext.TestsViewModel.ListItemCounter, StringFormat='dataitem{0:F0}', UpdateSourceTrigger=PropertyChanged, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=ListView}}"/>
                </Style>
            </ListView.ItemContainerStyle>
</ListView>

但对于每个ListViewItem，这都会导致以下错误：

System.Windows.Data错误：39:BindingExpression路径错误：“在“对象”“DataRowView”（HashCode=33913349）“上找不到TestsViewModel”属性。BindingExpression:Path=TestsViewModel.ListItemCounter；DataItem='DataRowView'（HashCode=33913349）；目标元素是“ListViewItem”（名称=“”）；目标属性为“AutomationId”（类型为“String”）

所以我试着和相对资源一起玩，就像这样：

<ListView IsEnabled="{Binding TestSelectorEnabled}" x:Name="ListView1" ItemsSource="{Binding TestsViewModel.TestsDataTable}" SelectedValue="{Binding TestsViewModel.SelectedTest}" SelectedValuePath="TestName" Height="180" View="{Binding TestsViewModel.GridView}"  TabIndex="0" MinWidth="1" Focusable="False">
            <ListView.ItemContainerStyle>
                <Style TargetType="ListViewItem">
                    <Setter Property="AutomationProperties.AutomationId" Value="{Binding TestsViewModel.ListItemCounter, StringFormat='dataitem{}{0}', RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=ListViewItem}}"/>
                </Style>
            </ListView.ItemContainerStyle>
</ListView>

 xmlns:vm="clr-namespace:ViewModels"            
 d:DataContext="{d:DesignInstance Type=vm:TestsViewModel, IsDesignTimeCreatable=True}"

<ListView IsEnabled="{Binding TestSelectorEnabled}" x:Name="ListView1" DataContext="{Binding TestsViewModel}" ItemsSource="{Binding TestsDataTable}" SelectedValue="{Binding SelectedTest}" SelectedValuePath="TestName" Height="180" View="{Binding GridView}"  TabIndex="0" MinWidth="1" Focusable="False">
            <ListView.ItemContainerStyle>
                <Style TargetType="ListViewItem">
                    <Setter Property="AutomationProperties.AutomationId" Value="{Binding ListItemCounter, StringFormat='dataitem{}{0}'}"/>
                </Style>
            </ListView.ItemContainerStyle>
</ListView>

这让我产生了这个错误：

System.Windows.Data错误：4:找不到引用为“RelativeSource FindAncestor，AncestorType='System.Windows.Controls.ListViewItem'，AncestorLevel='1'的绑定源。BindingExpression:Path=TestsViewModel.ListItemCounter；DataItem=null；目标元素是“ListViewItem”（名称=“”）；目标属性为“AutomationId”（类型为“String”）

---

有人能告诉我我做错了什么吗？

也许你忘了给你的窗口提供正确的数据上下文

它可能是这样的：

<ListView IsEnabled="{Binding TestSelectorEnabled}" x:Name="ListView1" ItemsSource="{Binding TestsViewModel.TestsDataTable}" SelectedValue="{Binding TestsViewModel.SelectedTest}" SelectedValuePath="TestName" Height="180" View="{Binding TestsViewModel.GridView}"  TabIndex="0" MinWidth="1" Focusable="False">
            <ListView.ItemContainerStyle>
                <Style TargetType="ListViewItem">
                    <Setter Property="AutomationProperties.AutomationId" Value="{Binding TestsViewModel.ListItemCounter, StringFormat='dataitem{}{0}', RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=ListViewItem}}"/>
                </Style>
            </ListView.ItemContainerStyle>
</ListView>

 xmlns:vm="clr-namespace:ViewModels"            
 d:DataContext="{d:DesignInstance Type=vm:TestsViewModel, IsDesignTimeCreatable=True}"

<ListView IsEnabled="{Binding TestSelectorEnabled}" x:Name="ListView1" DataContext="{Binding TestsViewModel}" ItemsSource="{Binding TestsDataTable}" SelectedValue="{Binding SelectedTest}" SelectedValuePath="TestName" Height="180" View="{Binding GridView}"  TabIndex="0" MinWidth="1" Focusable="False">
            <ListView.ItemContainerStyle>
                <Style TargetType="ListViewItem">
                    <Setter Property="AutomationProperties.AutomationId" Value="{Binding ListItemCounter, StringFormat='dataitem{}{0}'}"/>
                </Style>
            </ListView.ItemContainerStyle>
</ListView>

xmlns:vm=“clr命名空间：视图模型”
d:DataContext=“{d:DesignInstance Type=vm:TestsViewModel，IsDesignTimeCreatable=True}”

可能您忘记为窗口提供正确的数据上下文

它可能是这样的：

<ListView IsEnabled="{Binding TestSelectorEnabled}" x:Name="ListView1" ItemsSource="{Binding TestsViewModel.TestsDataTable}" SelectedValue="{Binding TestsViewModel.SelectedTest}" SelectedValuePath="TestName" Height="180" View="{Binding TestsViewModel.GridView}"  TabIndex="0" MinWidth="1" Focusable="False">
            <ListView.ItemContainerStyle>
                <Style TargetType="ListViewItem">
                    <Setter Property="AutomationProperties.AutomationId" Value="{Binding TestsViewModel.ListItemCounter, StringFormat='dataitem{}{0}', RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=ListViewItem}}"/>
                </Style>
            </ListView.ItemContainerStyle>
</ListView>

 xmlns:vm="clr-namespace:ViewModels"            
 d:DataContext="{d:DesignInstance Type=vm:TestsViewModel, IsDesignTimeCreatable=True}"

<ListView IsEnabled="{Binding TestSelectorEnabled}" x:Name="ListView1" DataContext="{Binding TestsViewModel}" ItemsSource="{Binding TestsDataTable}" SelectedValue="{Binding SelectedTest}" SelectedValuePath="TestName" Height="180" View="{Binding GridView}"  TabIndex="0" MinWidth="1" Focusable="False">
            <ListView.ItemContainerStyle>
                <Style TargetType="ListViewItem">
                    <Setter Property="AutomationProperties.AutomationId" Value="{Binding ListItemCounter, StringFormat='dataitem{}{0}'}"/>
                </Style>
            </ListView.ItemContainerStyle>
</ListView>

xmlns:vm=“clr命名空间：视图模型”
d:DataContext=“{d:DesignInstance Type=vm:TestsViewModel，IsDesignTimeCreatable=True}”

下面是我的工作XAML代码：

<ListView IsEnabled="{Binding TestSelectorEnabled}" x:Name="ListView1" DataContext="{Binding TestsViewModel.TestsDataTable}" ItemsSource="{Binding TestsViewModel.TestsDataTable}" SelectedValue="{Binding TestsViewModel.SelectedTest}" SelectedValuePath="TestName" Height="180" View="{Binding TestsViewModel.GridView}"  TabIndex="0" MinWidth="1" Focusable="False">
            <ListView.ItemContainerStyle>
                <Style TargetType="ListViewItem">
                    <Setter Property="AutomationProperties.AutomationId" Value="{Binding TestsViewModel.ListItemCounter, StringFormat='dataitem{}{0}'}"/>
                </Style>
            </ListView.ItemContainerStyle>
</ListView>

<ListView IsEnabled="{Binding TestSelectorEnabled}" x:Name="ListView1"  ItemsSource="{Binding TestsDataTable}" SelectedValue="{Binding SelectedTest}" SelectedValuePath="TestName" Height="180" View="{Binding GridView}"  TabIndex="0" MinWidth="1" Focusable="False">
            <ListView.ItemContainerStyle>
                <Style TargetType="ListViewItem">
                    <Setter Property="AutomationProperties.AutomationId" Value="{Binding Path=DataContext.TestsViewModel.ListItemCounter, StringFormat='dataitem{0:F0}', UpdateSourceTrigger=PropertyChanged, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=ListView}}"/>
                </Style>
            </ListView.ItemContainerStyle>
</ListView>

---

下面是我的工作XAML代码：

<ListView IsEnabled="{Binding TestSelectorEnabled}" x:Name="ListView1" DataContext="{Binding TestsViewModel.TestsDataTable}" ItemsSource="{Binding TestsViewModel.TestsDataTable}" SelectedValue="{Binding TestsViewModel.SelectedTest}" SelectedValuePath="TestName" Height="180" View="{Binding TestsViewModel.GridView}"  TabIndex="0" MinWidth="1" Focusable="False">
            <ListView.ItemContainerStyle>
                <Style TargetType="ListViewItem">
                    <Setter Property="AutomationProperties.AutomationId" Value="{Binding TestsViewModel.ListItemCounter, StringFormat='dataitem{}{0}'}"/>
                </Style>
            </ListView.ItemContainerStyle>
</ListView>

<ListView IsEnabled="{Binding TestSelectorEnabled}" x:Name="ListView1"  ItemsSource="{Binding TestsDataTable}" SelectedValue="{Binding SelectedTest}" SelectedValuePath="TestName" Height="180" View="{Binding GridView}"  TabIndex="0" MinWidth="1" Focusable="False">
            <ListView.ItemContainerStyle>
                <Style TargetType="ListViewItem">
                    <Setter Property="AutomationProperties.AutomationId" Value="{Binding Path=DataContext.TestsViewModel.ListItemCounter, StringFormat='dataitem{0:F0}', UpdateSourceTrigger=PropertyChanged, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=ListView}}"/>
                </Style>
            </ListView.ItemContainerStyle>
</ListView>

事实上，是datacontext设置不正确。我将在下面发布我的解决方案，它太长了，无法发表评论。事实上，是datacontext设置不正确。我将在下面发布我的解决方案，太长了，无法发表评论