如何在页面中具有多BindingContext

Question

如何创建2遍视图？在谷歌上没有发现类似的东西

我有一个onePage.xaml.cs，它正在调用OneViewModel。在oneViewModel中，它将刷新页面，并且应该调用twoViewModel。最后，twoViewModel将调用一些随机视图

如何编辑view.xaml.cs文件以处理两个不同的ViewsModel？第一遍应绑定到一个ViewModel，第二遍应绑定两个ViewModel

onePage.xaml(查看(

<Label Text={Binding TestLabel} />

onePage.xaml.cs(查看(

public onePage()
{
InitializeComponent();
BindingContext = new oneViewModel();
}

oneViewModel.cs(视图模型1(

async oneViewModel()
{
TestLabel = "View Mode 1"
await Shell.Current.GoToAsync(Shell.Current.CurrentState);
}

twoViewModel.cs(视图模型2(

async twoViewModel()
{
TestLabel = "View Mode 2"
await Shell.Current.GoToAsync(RandomPage);
}

Answer 1

只需更新页面的BindingContext

<StackLayout Padding="0,100,0,0">
<Label Text="{Binding Description}" />
<Button Text="Change" Clicked="Button_Clicked" />
</StackLayout>

背后的代码

public partial class MainPage : ContentPage
{
public MainPage()
{
InitializeComponent();
this.BindingContext = new VM("one");
}
void Button_Clicked(System.Object sender, System.EventArgs e)
{
this.BindingContext = new VM("two");
}
}
public class VM
{
public string Description { get; set; }
public VM(string desc)
{
this.Description = desc;
}
}