I have a xaml file with with an entry. I am binding the specific entry to a specific viewmodel. But the viewmodel expects a Navigator. How can I pass the navigator from the xaml file to the viewmodel?
<Entry Text="{Binding Signature, Mode=TwoWay}">
<Entry.BindingContext>
<vm:SignaturePopupViewModel>
// I need to pass a navigator..
</vm:SignaturePopupViewModel>
</Entry.BindingContext>
</Entry>
The viewmodel expects a navigation object. I use it to pop the page to go back to the previous page after running some code logic.
public SignaturePopupViewModel(INavigation navigation = null)
{
Navigation = navigation;
SendSignatureCommand = new Command(async () =>
{
await SendSignature();
await Navigation.PopAsync();
});
}
You do not need to use INavigation navigation in your SignaturePopupViewModel in your constructor to achieve the Navigation.
Just use a simple way is
await Application.Current.MainPage.Navigation.PopModalAsync(); Or
await Application.Current.MainPage.Navigation.PopAsync()
like following code.
public class SignaturePopupViewModel
{
public ICommand SendSignatureCommand { protected set; get; }
public SignaturePopupViewModel( )
{
SendSignatureCommand = new Command(async () =>
{
await SendSignature();
// if you use the MainPage = new NavigationPage( new MainPage()); in
//App.xaml.cs use following code.
await Application.Current.MainPage.Navigation.PopAsync();
// if not, just use await Application.Current.MainPage.Navigation.PopModalAsync();
});
}
}