Question

为什么显示数据：

 <ItemsControl ItemsSource="{Binding Path=.}">
                <ItemsControl.ItemTemplate>
                    <DataTemplate>
                        <StackPanel Orientation="Vertical">
                            <TextBlock FontWeight="Bold" Text="{Binding Category}" />
                            <TextBlock Text=", " />
                            <TextBlock Text="{Binding Title}" />
                            <TextBlock Text=" " />
                            <Label Content="{Binding ImageUrl}" Foreground="Blue" />
                        </StackPanel>
                    </DataTemplate>
                </ItemsControl.ItemTemplate>
            </ItemsControl>

以下显示空行（但与dataitems一样多）：

 <ListBox ItemsSource="{Binding Path=.}">
                <ListBox.ItemTemplate>
                    <DataTemplate>
                        <StackPanel Orientation="Vertical">
                            <TextBlock FontWeight="Bold" Text="{Binding Category}" />
                            <TextBlock Text=", " />
                            <TextBlock Text="{Binding Title}" />
                            <TextBlock Text=" " />
                            <Label Content="{Binding ImageUrl}" Foreground="Blue" />
                        </StackPanel>
                    </DataTemplate>
                </ListBox.ItemTemplate>
            </ListBox>

Answer 1

尝试在类别的getter中添加断点。它会被击中吗？
查看VS中的“输出”窗口，您是否看到任何绑定错误？

我在Blend中创建了一个测试应用程序，使用以下代码，我在两种情况下都看到了列表。所以也许你的其他代码（Binding，Code-behind，Viewmodel等）存在一些问题，但如果正确连接，你的ListBox和ItemsControl都应该有效。

<Grid x:Name="LayoutRoot" DataContext="{Binding Source={StaticResource SampleDataSource}, Path=Collection}">
    <Grid.RowDefinitions>
        <RowDefinition></RowDefinition>
        <RowDefinition></RowDefinition>
    </Grid.RowDefinitions>

    <ItemsControl Grid.Row="0" ItemsSource="{Binding Path=.}">
            <ItemsControl.ItemTemplate>
                <DataTemplate>
                    <StackPanel Orientation="Vertical">
                        <TextBlock FontWeight="Bold" Text="{Binding Category}" />
                        <TextBlock Text=", " />
                        <TextBlock Text="{Binding Title}" />
                        <TextBlock Text=" " />
                        <Label Content="{Binding ImageUrl}" Foreground="Blue" />
                    </StackPanel>
                </DataTemplate>
            </ItemsControl.ItemTemplate>
        </ItemsControl>

        <ListBox Grid.Row="1" ItemsSource="{Binding Path=.}">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <StackPanel Orientation="Vertical">
                        <TextBlock FontWeight="Bold" Text="{Binding Category}" />
                        <TextBlock Text=", " />
                        <TextBlock Text="{Binding Title}" />
                        <TextBlock Text=" " />
                        <Label Content="{Binding ImageUrl}" Foreground="Blue" />
                    </StackPanel>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>
</Grid>

ListBox不显示数据

1 个答案: