C# Xamarin MasterDetailPage按钮

我如何通过Homepage.xaml.cs和Homepage.xaml中的可点击按钮来引用母版详细信息页面（菜单导航）

我希望每当我单击“菜单”按钮时，侧菜单都会出现。（见下文） 我在Homepage.xaml.cs中的clicked button事件处理程序中尝试了MasterDetail.isPresentedProperty，但无法找到它

请帮忙

MenuNavigation.xaml：

<MasterDetailPage xmlns="http://xamarin.com/schemas/2014/forms"
              xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
              x:Class="App2.MenuNavigation"
              xmlns:local="clr-namespace:App2">


<!--this is the Menu Hamburger sidebar -->
<MasterDetailPage.Master>
    <ContentPage Title="Menu" Padding="20" BackgroundColor="#4B1388" >
        <StackLayout Orientation="Vertical">
            <Label Text="Menu" TextColor="White" FontSize="Large" FontAttributes="Bold"  HorizontalOptions="Center"/>

            <Button Text="Home"
                    TextColor="White" BackgroundColor="#4B1388" 
                    Clicked="Button_Clicked_Home"/> <!-- event handler points to MenuNavigation C# file when button is clicked-->
            <Button Text="About" 
                    TextColor="White" BackgroundColor="#4B1388" 
                    Clicked="Button_Clicked_About"/> 
            <Button Text="Help" 
                    TextColor="White" BackgroundColor="#4B1388" 
                    Clicked="Button_Clicked_Help"/>
        </StackLayout>
    </ContentPage>
</MasterDetailPage.Master>

<!--links to the detail pages from the hamburger sidebar -->
<MasterDetailPage.Detail>

</MasterDetailPage.Detail>

}

Homepage.xaml：

<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
         xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
         x:Class="App2.Homepage"
         Title="Homepage">

            <Button Text="Menu" Clicked="MasterDetailButton_Pressed"/>
</ContentPage>

---

您应该获得MasterDetailPage的引用，并更改引用的IsPresented属性。由于MasterDetailPage必须是应用程序的根目录，类似这样的操作应该有效：

（app.Current.MainPage作为MasterDetailPage）。IsPresented=true

希望有帮助！：）

<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
         xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
         x:Class="App2.Homepage"
         Title="Homepage">

            <Button Text="Menu" Clicked="MasterDetailButton_Pressed"/>
</ContentPage>

namespace App2
{
    [XamlCompilation(XamlCompilationOptions.Compile)]
    public partial class Homepage : ContentPage
    {

        public Homepage()
    {
        InitializeComponent();

        VideoListView.ItemsSource = Videos; //allows for binding
    }
    private void MasterDetailButton_Pressed(object sender, EventArgs e)
        {
            MasterDetailPage.IsPresentedProperty.Equals(true);
            //open the master detail page when button is clicked.
            //MasterDetailPage.IsPresentedProperty.Equals(true);
            //MenuNavigation.IsPresentedProperty.Equals(true);
        }
    }
}