Question

请注意我使用的是特定于WPF的F＃。如何在任何深度设置控件子级的DataContext？特别是如何设置数据上下文来控制名称“TargetControl”。问题背景：

的App.xaml：

<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        >
    <Frame Name="Frame" Source="MainWindow.xaml" />
</Window>

MainWindow.xaml：

<UserControl xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <Grid>
        <TabControl Grid.Row="0" Grid.Column="0" Name="mainTab">
            <!-- Tests work area -->
            <TabItem Header="Проверка проекта">
                <Frame Source="TestsPropagate.xaml" />
            </TabItem>
        </TabControl>
    </Grid>
</UserControl>

的 TestsPropagate.xaml 的

<UserControl 
    Name="TargetControl"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <TextBox Text="{Binding Path=testField}" />
</UserControl>

我的引导程序启动此上限：

[<STAThread>]
[<EntryPoint>]
let main(_) = //(new Application()).Run(Application.Current) //mainWindowViewModel)
    OFTD.DOM.ExtraEntities.Verification.EnitiesInitializer.InitializeReaders()
    let app = new Application()
    let view = Application.LoadComponent( new System.Uri("App.xaml", UriKind.Relative) ) :?> Window

    let vm = new AppViewModel() // is data context to TargetControl    
    app.Run(view)

Answer 1

对fsharp语法不太确定，但这应该有意义：

let vm = new AppViewModel() // is data context to TargetControl    
view.DataContext <- vm
app.Run(view)

如何继承DataContext？

1 个答案: