[英]Xamarin Forms. Load View from ViewModel after button click
如何才能做到這一點? 我已經能夠使用xaml來實現它,就像這樣。 我將如何使用ViewModel
模式執行此操作?
View.xaml
<Button Margin="50,0,20,20" FontSize="Large" Text="Test" Clicked="Button_Clicked">
</Button>
View.cs
private void Button_Clicked(object sender, EventArgs e)
{
Get_LessonViewAsync();
}
private async void Get_LessonViewAsync()
{
var view = new LessonView();
await Navigation.PushModalAsync(view);
}
在xaml中,您可以使用Command屬性進行綁定:
<Button Margin="50,0,20,20" FontSize="Large" Text="Test" Command="{Binding ButtonCommand}"></Button>
在您的ViewModel中:
public ICommand ButtonCommand { get; private set; }
public ICommand GoLeftCommand { get; private set; }
public ICommand GoRightCommand { get; private set; }
public DemoViewModel ()
{
...
ButtonCommand = new Command (() => {
var view = new LessonView();
await Navigation.PushModalAsync(view);
});
GoLeftCommand = new Command (() => {
var view = new LeftView();
await Navigation.PushModalAsync(view);
});
GoRightCommand = new Command (() => {
var view = new RightView();
await Navigation.PushModalAsync(view);
});
}
摘錄自:David Britch的https://blog.xamarin.com/simplifying-events-with-commanding/
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