Question

我正在尝试绑定此组合：

<ComboBox ItemsSource="{Binding StudentStudyPointsList, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type local:MainWindow}}}">
    <ComboBox.ItemTemplate>
        <DataTemplate>
            <StackPanel Orientation="Horizontal">
                <TextBlock Text="{Binding Number}"/>
                <TextBlock Text=" - "/>
                <TextBlock Text="{Binding Title}"/>
            </StackPanel>
        </DataTemplate>
    </ComboBox.ItemTemplate>
</ComboBox>

错误：

System.Windows.Data错误：40：BindingExpression路径错误：

＆＃39; StudentStudyPointsList＆＃39;在＆＃39; object＆＃39;上找不到的属性＆＃39;＆＃39;主窗口＆＃39;    （名称=＆＃39;＆＃39;）＆＃39 ;. BindingExpression：路径= StudentStudyPointsList;

的DataItem =＆＃39;主窗口＆＃39; （名称=＆＃39;＆＃39）;目标元素是＆＃39; ComboBox＆＃39;    （名称=＆＃39;＆＃39）;目标属性是＆＃39; ItemsSource＆＃39; （键入＆＃39; IEnumerable＆＃39;）

该属性在主视图模型中公开定义：

public List<StudyPointItem> StudentStudyPointsList { get; set; }

主窗口有这个DataContext：

<Window.DataContext>
    <local:OCLMEditorModelView/>
</Window.DataContext>

如何让Combo正确绑定itemsource？

Answer 1

我需要：

<ComboBox DataContext="{Binding DataContext, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type local:MainWindow}}}"
          ItemsSource="{Binding ReadingStudyPointsList}">
    <ComboBox.ItemTemplate>
        <DataTemplate>
            <StackPanel Orientation="Horizontal">
                <TextBlock Text="{Binding Number}"/>
                <TextBlock Text=" - "/>
                <TextBlock Text="{Binding Title}"/>
            </StackPanel>
        </DataTemplate>
    </ComboBox.ItemTemplate>
</ComboBox>

从主窗口资源属性绑定组合框到itemsource

1 个答案: