Powoli uczę się MVVMa w Wpfie...konkretnie mam problem z ładowaniem zawartości dwóch textboxów do kontrolki Label i Messagebox. Po kompilacji MessageBox wyskakuje ale bez wpisanej zawartności z textboxów.
Poniżej kod:
Person.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.ComponentModel;
using System.Text;
using System.Threading.Tasks;
namespace NextMVVM.Model
{
public class Person : INotifyPropertyChanged
{
private string _Imie;
public string Imie
{
get { return _Imie; }
set { _Imie = value;
OnPropertyChanged("Imie");
}
}
private string _Nazwisko;
public string Nazwisko
{
get { return _Nazwisko; }
set { _Nazwisko = value;
OnPropertyChanged("Nazwisko");
}
}
private string _FullName;
public string FullName
{
get { return _FullName = Imie + " " + Nazwisko; }
set
{
if (_FullName != value)
{
_FullName = value;
OnPropertyChanged("FullName");
}
}
}
public event PropertyChangedEventHandler PropertyChanged;
private void OnPropertyChanged(string propertyName)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs(propertyName));
}
}
}
}
PersonViewModel
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.ComponentModel;
using NextMVVM.Model;
using System.Windows.Input;
using NextMVVM.Command;
using System.Windows;
namespace NextMVVM.ViewModel
{
public class PersonViewModel : INotifyPropertyChanged
{
private Person _Person;
public Person Person
{
get { return _Person; }
set
{
_Person = value;
OnPropertyChanged("Person");
}
}
public ICommand Content { get { return new RelayCommand(execute, canexecute); } }
private bool canexecute(object parameter)
{
return true;
}
private void execute(object parameter)
{
Person Person = new Person();
string.Format("{0} jest OK", Person.FullName);
MessageBox.Show("Witaj " + Person.FullName);
}
public event PropertyChangedEventHandler PropertyChanged;
private void OnPropertyChanged(string propertyName)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs(propertyName));
}
}
}
}
RelayCommand
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Input;
namespace NextMVVM.Command
{
public class RelayCommand : ICommand
{
Action<object> _execute;
Func<object, bool> _canexecute;
public RelayCommand(Action<object> execute, Func<object, bool> canexecute)
{
_execute = execute;
_canexecute = canexecute;
}
public bool CanExecute(object parameter)
{
if (_canexecute != null)
{
return _canexecute(parameter);
}
else
{
return false;
}
}
public event EventHandler CanExecuteChanged
{
add { CommandManager.RequerySuggested += value; }
remove { CommandManager.RequerySuggested -= value; }
}
public void Execute(object parameter)
{
_execute(parameter);
}
}
}
MainWindow.xaml
<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:NextMVVM"
xmlns:ViewModel="clr-namespace:NextMVVM.ViewModel" x:Class="NextMVVM.MainWindow"
mc:Ignorable="d"
Title="MainWindow" Height="350" Width="525">
<Grid>
<TextBox x:Name="textBox" Text="{Binding Person.Imie, Mode=TwoWay}" HorizontalAlignment="Left" Height="23" Margin="86,55,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="120"/>
<TextBox x:Name="textBox1" Text="{Binding Person.Nazwisko, Mode=TwoWay}" HorizontalAlignment="Left" Height="23" Margin="86,92,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="120"/>
<Label x:Name="label" Content="{Binding Person.FullName}" HorizontalAlignment="Left" Margin="266,92,0,0" VerticalAlignment="Top"/>
<Button x:Name="button" Content="Pokaż" Command="{Binding Content}" HorizontalAlignment="Left" Margin="86,136,0,0" VerticalAlignment="Top" Width="75"/>
<TextBox x:Name="textBox2" HorizontalAlignment="Left" Height="23" Margin="86,208,0,0" TextWrapping="Wrap" Text="{Binding Person.FullName, UpdateSourceTrigger=PropertyChanged}" VerticalAlignment="Top" Width="120"/>
</Grid>
</Window>
MainWindow.cs
using NextMVVM.ViewModel;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
namespace NextMVVM
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
DataContext = new PersonViewModel();
}
}
}
C# 
