wpf - 在contentpresenter : Binding inside ContentTemplate is not working上设置Datacontext

Question

我正在学习WPF和MVVM模式，并试图建立一个类似日历的 View 。
所以我目前有一个包含6行7列的网格。
第一行应为标题，从而指定“星期一，星期二等...”这样的星期几
我的MonthView.xaml中现在有以下内容

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="{Binding RowHeight}"/>
        <RowDefinition Height="{Binding RowHeight}"/>
        <RowDefinition Height="{Binding RowHeight}"/>
        <RowDefinition Height="{Binding RowHeight}"/>
        <RowDefinition Height="{Binding RowHeight}"/>
        <RowDefinition Height="{Binding RowHeight}"/>
        <RowDefinition Height="{Binding RowHeight}"/>
    </Grid.RowDefinitions>

    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="{Binding CellWidth}"/>
        <ColumnDefinition Width="{Binding CellWidth}"/>
        <ColumnDefinition Width="{Binding CellWidth}"/>
        <ColumnDefinition Width="{Binding CellWidth}"/>
        <ColumnDefinition Width="{Binding CellWidth}"/>
        <ColumnDefinition Width="{Binding CellWidth}"/>
        <ColumnDefinition Width="{Binding CellWidth}"/>
    </Grid.ColumnDefinitions>

    <!-- Header Row-->
    <ContentPresenter Grid.Row="0" Grid.Column="0">
        <ContentPresenter.ContentTemplate>
            <DataTemplate>
                <TextBlock Text="{Binding DaysOfWeek[0]}"/>
            </DataTemplate>
        </ContentPresenter.ContentTemplate>
    </ContentPresenter>
    <ContentPresenter ContentTemplate="{StaticResource CalendarHeaderCellTemplate}" Grid.Row="0" Grid.Column="1" DataContext="{Binding DaysOfWeek[1]}"/>
    <ContentPresenter ContentTemplate="{StaticResource CalendarHeaderCellTemplate}" Grid.Row="0" Grid.Column="2" DataContext="{Binding DaysOfWeek[2]}"/>
    <ContentPresenter ContentTemplate="{StaticResource CalendarHeaderCellTemplate}" Grid.Row="0" Grid.Column="3" DataContext="{Binding DaysOfWeek[3]}"/>
    <ContentPresenter ContentTemplate="{StaticResource CalendarHeaderCellTemplate}" Grid.Row="0" Grid.Column="4" DataContext="{Binding DaysOfWeek[4]}"/>
    <ContentPresenter ContentTemplate="{StaticResource CalendarHeaderCellTemplate}" Grid.Row="0" Grid.Column="5" DataContext="{Binding DaysOfWeek[5]}"/>
    <ContentPresenter ContentTemplate="{StaticResource CalendarHeaderCellTemplate}" Grid.Row="0" Grid.Column="6" DataContext="{Binding DaysOfWeek[6]}"/>

    <!-- 1st Row-->
    <ContentPresenter ContentTemplate="{StaticResource CalendarCellTemplate}" Grid.Row="1" Grid.Column="0"/>
    <ContentPresenter ContentTemplate="{StaticResource CalendarCellTemplate}" Grid.Row="1" Grid.Column="1"/>
    <ContentPresenter ContentTemplate="{StaticResource CalendarCellTemplate}" Grid.Row="1" Grid.Column="2"/>
    <ContentPresenter ContentTemplate="{StaticResource CalendarCellTemplate}" Grid.Row="1" Grid.Column="3"/>
    <ContentPresenter ContentTemplate="{StaticResource CalendarCellTemplate}" Grid.Row="1" Grid.Column="4"/>
    <ContentPresenter ContentTemplate="{StaticResource CalendarCellTemplate}" Grid.Row="1" Grid.Column="5"/>
    <ContentPresenter ContentTemplate="{StaticResource CalendarCellTemplate}" Grid.Row="1" Grid.Column="6"/>

依此类推:您会看到我猜的模式。

这是CalendarHeaderCellTemplate

<DataTemplate x:Key="CalendarHeaderCellTemplate">
    <StackPanel Margin="5" Background="Blue">
        <TextBlock Text="{Binding}"></TextBlock>
    </StackPanel>
</DataTemplate>

这是ViewModel的重要部分:

 public ObservableCollection<string> DaysOfWeek { get; private set; }
 public MonthViewModel()
    {  
        this.DaysOfWeek = new ObservableCollection<string> {DayOfWeek.Monday.ToString(), DayOfWeek.Tuesday.ToString(), DayOfWeek.Wednesday.ToString(), 
            DayOfWeek.Thursday.ToString(), DayOfWeek.Friday.ToString(), DayOfWeek.Saturday.ToString(), DayOfWeek.Sunday.ToString()};

    }

现在，我在其中定义DataTemplate'inline'的Contentpresenter都不会在其TextBlock和CalendarHeaderCellTemplate内部显示任何内容。

有趣的是，在Visual Studio设计器中，除了第一个单元格(即带有内联模板的单元格)之外，其他所有内容均正确显示

有没有人有建议。

N.B. “内联”模板主要用于测试目的。

编辑:
这样做(请参阅下文)而不是使用ContentPresenter可以正常工作。也许我以错误的方式使用ContentPresenter？

 <StackPanel Grid.Row="0" Grid.Column="0">
     <TextBlock Text="{Binding DaysOfWeek[0]}"/>
 </StackPanel>

我之所以要使用ContentPresenter，是因为每个单元格内容的DataTemplate最终都将不仅仅是一个文本框。

Answer 1

尝试将ContentPresenter更改为

    <ContentPresenter Content="{Binding DaysOfWeek[0]}" Grid.Row="0" Grid.Column="0">
        <ContentPresenter.ContentTemplate>
            <DataTemplate>
                <TextBlock Text="{Binding}"/>
            </DataTemplate>
        </ContentPresenter.ContentTemplate>
    </ContentPresenter>

或者

  <ContentPresenter Content="{Binding}" Grid.Row="0" Grid.Column="0">
        <ContentPresenter.ContentTemplate>
            <DataTemplate>
                <TextBlock Text="{Binding DaysOfWeek[0]}"/>
            </DataTemplate>
        </ContentPresenter.ContentTemplate>
    </ContentPresenter>

并用类似Content的内容替换您的DataContext

<ContentPresenter ContentTemplate="{StaticResource CalendarHeaderCellTemplate}" Grid.Row="0" Grid.Column="1" Content="{Binding DaysOfWeek[1]}"/>