У меня возникает проблема, когда я пытаюсь использовать команду для открытия второй модели просмотра. V4.0.Beta5. я следовал Exemple описано в N + 1 видео серии https://www.youtube.com/playlist?list=PLR6WI6W1JdeYSXLbm58jwAKYT7RQR31-WMVVMcross Command Binding fire Exception
Первый ViewModel
public class FirstViewModel
: MvxViewModel
{
private string _hello = "Hello MvvmCross";
public string Hello
{
get { return _hello; }
set
{
_hello = value;
RaisePropertyChanged(() => Hello);
}
}
private Cirrious.MvvmCross.ViewModels.MvxCommand _goSecondViewCommand;
public System.Windows.Input.ICommand GoSecondViewCommand
{
get
{
_goSecondViewCommand = _goSecondViewCommand ??
new Cirrious.MvvmCross.ViewModels.MvxCommand(DoGoSecondView);
return _goSecondViewCommand;
}
}
private void DoGoSecondView()
{
base.ShowViewModel<SecondViewModel>();
}
}
Second View модель
public class SecondViewModel :MvxViewModel
{
private string _hello2 = "Hello2 MvvmCross";
public string Hello2
{
get { return _hello2; }
set
{
_hello2 = value;
RaisePropertyChanged(() => Hello2);
}
}
}
Первый взгляд
<views:MvxWindowsPage
x:Class="TestCommand.UWP.Views.FirstView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:TestCommand.UWP"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:views="using:Cirrious.MvvmCross.WindowsUWP.Views"
mc:Ignorable="d">
<Grid>
<TextBox x:Name="textBox" HorizontalAlignment="Left" Margin="70,92,0,0" TextWrapping="Wrap" Text="FirstView" VerticalAlignment="Top" Width="223"/>
<Button x:Name="button" Command="{Binding GoSecondViewCommand}" Content="Button" HorizontalAlignment="Left" Height="108" Margin="70,346,0,0" VerticalAlignment="Top" Width="223"/>
</Grid>
Второй вид
<views:MvxWindowsPage
x:Class="TestCommand.UWP.Views.SecondView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:TestCommand.UWP.Views"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:views="using:Cirrious.MvvmCross.WindowsUWP.Views"
mc:Ignorable="d"
d:DesignHeight="300"
d:DesignWidth="400">
<Grid />
установки Класс:
public class Setup : MvxWindowsSetup
{
public Setup(Frame rootFrame) : base(rootFrame)
{
}
protected override IMvxApplication CreateApp()
{
return new TestCommand.Core.App();
}
}
Если вы хотите, вы можете загрузить решение здесь: https://onedrive.live.com/redir?resid=A5D9789788DE33CB!36079&authkey=!AKs9nsG28iI6nQQ&ithint=file%2czip.
В чем исключение? –
e = {Windows.UI.Xaml.Navigation.NavigationFailedEventArgs} -> Exception = {"Ссылка на объект не установлена в экземпляр объекта."} – Exatex
У вас есть SecondView? (вы показываете только первый вид) –