Question

我想将一个数据绑定到多个控件。在 WPF 中是否有一些逻辑控制来实现这一目标？例如，我有Grid

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="Auto" />
        <RowDefinition Height="*" />
    </Grid.RowDefinitions>
    <Grid.ColumnDefinitions>
        <ColumnDefinition />
        <ColumnDefinition />
    </Grid.ColumnDefinitions>

    <TextBlock Text="{Binding Name}" />
    <Button Grid.Column="1" Grid.RowSpan="2" IsEnabled="{Binding IsSimulationRunning}" />
    <controls:PlayerControl Grid.Row="1" IsEnabled="{Binding IsLoaded}" />
</Grid>

我希望将TextBlock绑定到一个数据，将Button和PlayerControl绑定到另一个数据，如下所示：

<Container DataContext="{Binding Object2}">
    <Button IsEnabled="{Binding IsSimulationRunning}" />
    <controls:PlayerControl IsEnabled="{Binding IsLoaded}" />
</Container>

我怎样才能以最好的方式做到这一点？

Answer 1

绑定绑定到包含依赖项属性的元素的DataContext。您可以将DataContext绑定到基础视图模型：

<TextBlock DataContext="{Binding Object1}" Text="{Binding Name}" />
<Button Grid.Column="1" Grid.RowSpan="2" 
    DataContext="{Binding Object2}" IsEnabled="{Binding IsSimulationRunning}" />
<controls:PlayerControl Grid.Row="1" 
    DataContext="{Binding Object2}" IsEnabled="{Binding IsLoaded}" />

如果您的视图模型如下所示：

public class PlayerViewModel {        
    public TrackViewModel Object1 { get; set; }
    public PlaybackViewModel Object2 { get; set; }
}
public class TrackViewModel { public string Name { get; set; } }
public class PlaybackViewModel { 
    public bool IsLoaded { get; set; } 
    public bool IsSimulationRunning { get; set; }
}

在这种情况下，您可以直接绑定到对象。重点是您需要在一个通用视图模型中拥有两个对象。

<TextBlock Text="{Binding Path=Object1.Name}" />
<Button Grid.Column="1" Grid.RowSpan="2" IsEnabled="{Binding Path=Object2.IsSimulationRunning}" />
<controls:PlayerControl Grid.Row="1" IsEnabled="{Binding Path=Object2.IsLoaded}" />

WPF中的逻辑容器绑定数据

1 个答案: