绑定到 DataTemplate 动态创建的 UserControl 属性

Question

我在 App.xaml 中有一个 DataTemplate :

<DataTemplate DataType="{x:Type local2:DirectoryFilesViewModel}">
            <StackPanel Orientation="Vertical">
                <StackPanel Orientation="Horizontal" Height="Auto">
                    <TextBlock DockPanel.Dock="Top"><Hyperlink  Style="{StaticResource ButtonHype}"
                    Command="{Binding ClickCommand}"><InlineUIContainer>
                    <Image Source="{Binding FolderImage}"  VerticalAlignment="Center" Stretch="Uniform"
                        RenderOptions.BitmapScalingMode="HighQuality" RenderTransformOrigin=".5,.5"
                        ToolTip="Disc" Margin="7,9,0,0" Height="27" />
                </InlineUIContainer></Hyperlink></TextBlock>
                    <TextBlock Text="{Binding DiscName}" FontSize="2" Margin="8,10,0,0">
                        <TextBlock.Style>
                            <Style TargetType="TextBlock">
                                <Style.Triggers>
                                    <EventTrigger RoutedEvent="Loaded">
                                        <EventTrigger.Actions>
                                            <BeginStoryboard>
                                                <Storyboard>
                                                    <DoubleAnimation Duration="0:0:0.7" Storyboard.TargetProperty="FontSize" To="20" />
                                                </Storyboard>
                                            </BeginStoryboard>
                                        </EventTrigger.Actions>
                                    </EventTrigger>
                                </Style.Triggers>
                            </Style>
                        </TextBlock.Style>
                    </TextBlock>
                </StackPanel>
                <ListBox ItemsSource="{Binding DiscFiles}" >
                    <ListBox.ItemTemplate>
                        <DataTemplate>
                            <controls:MemberListItem /> // Need to bind to a TextBlock in this Control
                        </DataTemplate>
                    </ListBox.ItemTemplate>
                </ListBox>
            </StackPanel>
/DataTemplate>

一切都很好，除了 ListBox UserControl...似乎无法绑定到其中的 TextBlock。有人能指出我正确的方向吗？

用户控件：

<UserControl x:Class="Music.Controls.MemberListItem"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:local2="clr-namespace:MusicMurfer.ViewModels"
         mc:Ignorable="d"
         d:DesignHeight="30" d:DesignWidth="300" Height="32" Width="Auto">
<!--<UserControl.DataContext>
    <local2:MemberListViewModel />
</UserControl.DataContext>-->
<Grid VerticalAlignment="Top">
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="Auto" />
        <ColumnDefinition Width="Auto" />
    </Grid.ColumnDefinitions>

    <Image HorizontalAlignment="Center" VerticalAlignment="Center" Grid.Row="0" Grid.Column="0"
             Source="{Binding DiscFileImage}" RenderOptions.BitmapScalingMode="HighQuality" Height="15"
            Margin="-2,5,5,5" Stretch="Uniform"  RenderTransformOrigin=".5,.5" />

    <TextBlock Grid.Column="1" Width="Auto"  Foreground="White" TextAlignment="Left"
               VerticalAlignment="Center" FontSize="6" x:Name="FileText" Margin="5,5,5,5"
               Height="Auto" ToolTip="Click to Play" Text="{Binding ThisDoesntWorkYet}">

        <TextBlock.Style>
            <Style TargetType="TextBlock">
                <Style.Triggers>
                    <EventTrigger RoutedEvent="Loaded">
                        <EventTrigger.Actions>
                            <BeginStoryboard>
                                <Storyboard>
                                    <DoubleAnimation Duration="0:0:0.4" Storyboard.TargetProperty="FontSize" To="16" />
                                </Storyboard>
                            </BeginStoryboard>
                        </EventTrigger.Actions>
                    </EventTrigger>
                </Style.Triggers>
            </Style>
        </TextBlock.Style>
    </TextBlock>
</Grid>

所以抱怨主要是代码 - 需要详细信息

Answer 1

在实际的 "MemberListItem" 控件中，您需要将文本框的文本属性绑定到将出现在用户控件的数据上下文中的数据成员（这是一个特定的DiscFiles 集合中的成员）。

因此，如果您的用户控件类似于：

<UserControl>
  <TextBlock Text="{Binding DiscFileName, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}" />
</UserControl>

将 DiscFile 对象上的 "DiscFileName" 替换为 "Name" 属性。您没有将文本绑定放在 DataTemplate 中用户控件的实际实例上。

绑定到 DataTemplate 动态创建的 UserControl 属性

Binding to DataTemplate dynamically created UserControl Property

wpf

mvvm