從主窗口（窗口）調用WPF視圖（UserControl）方法

Question

我在視圖（UserControl）上有一個調用代碼隱藏文件中的方法的按鈕。我想擺脫按鈕，而是調用菜單項中的方法。不知道如何做到這一點。這裏示出了該情況的一些簡單的代碼：MainView.xaml

<Window x:Class="Example.MainWindow" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    xmlns:View="clr-namespace:Example.View" 
    Title="MainWindow" Height="600" Width="800" Background="Green"> 
<Grid> 
    <StackPanel> 
     <Menu> 
      <MenuItem Header="File" Click="MenuItem_Click"> 
      </MenuItem> 
     </Menu> 
     <View:MainView/> 
    </StackPanel> 
</Grid> 

MainWindow.xaml.cs

using System.Windows; 

namespace Example 
{ 
    public partial class MainWindow : Window 
    { 
    private void MenuItem_Click(object sender, RoutedEventArgs e) 
    { 
     MessageBox.Show("MainWindow"); 

     // how can I invoke MainView methods like DoWork from here? 
    } 
    } 
} 

：

MainWindow.xaml（的MainView嵌入）

<UserControl x:Class="Example.View.MainView" 
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
mc:Ignorable="d" d:DesignHeight="500" d:DesignWidth="600"> 

<Grid Background="Yellow"> 
    <Button HorizontalAlignment="Left" VerticalAlignment="Top" Margin="10" Content="Show" Click="Button_Click"/> 
</Grid> 

</UserControl> 

個MainView.xaml.cs

using System.Windows.Controls; 

namespace Example.View 
{ 
    public partial class MainView : UserControl 
    { 
    public MainView() 
    { 
     InitializeComponent(); 
    } 

    private void Button_Click(object sender, System.Windows.RoutedEventArgs e) 
    { 
     DoWork(); 
    } 

    public void DoWork() 
    { 
     MessageBox.Show("MainView"); 
    } 
    } 
} 

Answer 1

你可以只給一個名字的MainView，

<Window x:Class="Example.MainWindow" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    xmlns:View="clr-namespace:Example.View" 
    Title="MainWindow" Height="600" Width="800" Background="Green"> 
    <Grid> 
     <StackPanel> 
      <Menu> 
       <MenuItem Header="File" Click="MenuItem_Click"/> 
      </Menu> 
      <View:MainView x:Name="mainView"/> 
     </StackPanel> 
    </Grid> 
</Window> 

，並調用這樣的方法：

private void MenuItem_Click(object sender, RoutedEventArgs e) 
{ 
    mainView.DoWork(); 
}