XMLA，數據綁定不工作

<Window x:Class="RMT_MMO.Starter.MainWindow" 
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
     Title="MainWindow" Height="304" Width="472" 
     ResizeMode="NoResize"> 
    <Grid Margin="10"> 

     <Grid.ColumnDefinitions> 
      <ColumnDefinition Width="100*"/> 
      <ColumnDefinition Width="200*"/> 
     </Grid.ColumnDefinitions> 

     <Grid.RowDefinitions> 
      <RowDefinition Height="50*"/> 
      <RowDefinition Height="10*"/> 
      <RowDefinition Height="40*"/> 
      <RowDefinition Height="40*"/> 
      <RowDefinition Height="80*"/> 
     </Grid.RowDefinitions> 

<ProgressBar Grid.ColumnSpan="2" Maximum="100" Value="{Binding Percent}"/> 
<Label Grid.ColumnSpan="2" Content="{Binding Status }" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" FontSize="14" FontWeight="Bold" Margin="0,0,0,10"/> 

     <Label Grid.Row="2" Content="Username" HorizontalContentAlignment="Right" VerticalContentAlignment="Center" FontSize="14" FontWeight="Bold"/> 
     <TextBox IsEnabled="{Binding CanLogin}" Grid.Row="2" Grid.Column="1" Margin="5" Text="{Binding Username}" HorizontalContentAlignment="Center" VerticalContentAlignment="Center"/> 

     <Label Grid.Row="3" Content="Password" HorizontalContentAlignment="Right" VerticalContentAlignment="Center" FontSize="14" FontWeight="Bold"/> 
     <PasswordBox IsEnabled="{Binding CanLogin}" Grid.Row="3" Grid.Column="1" Margin="5" x:Name="Password" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" /> 

     <Button Click="Login" IsDefault="True" IsEnabled="{Binding CanLogin}" Content="asdasd" Grid.Row="4" HorizontalAlignment="Left" Padding="10" Margin="10,25,0,19" RenderTransformOrigin="7.273,0.484" Width="247" Grid.Column="1"/> 

    </Grid> 
</Window>

因此，這裏怎麼MainWindow的樣子，當我點擊按鈕的代碼執行XMLA，數據綁定不工作

using System.Windows; 

namespace RMT_MMO.Starter 
{ 
    public partial class MainWindow 
    { 
     private readonly MainWindowViewModel _viewModel; 
     public MainWindow() 
     { 
      InitializeComponent(); 
      _viewModel = new MainWindowViewModel(); 
      DataContext = _viewModel; 
      _viewModel.CanLogin = true; 
     } 

     public void Login(object sender,RoutedEventArgs e) 
     { 
      // MessageBox.Show(_viewModel.Percent.ToString()); 
       _viewModel.CanLogin = false; 
       _viewModel.Percent =50; 
      //  _viewModel.Status = "Stuff happened"; 
     } 
    } 
}

而且MainWindowViewModel類看起來是這樣的：

using System.ComponentModel; 
using System.Runtime.CompilerServices; 

namespace RMT_MMO.Starter 
{ 
    public class MainWindowViewModel:INotifyPropertyChanging 
    { 
     private bool _canLogin; 
     private string _status; 
     private double _percent; 
     private string _username; 

     public event PropertyChangingEventHandler PropertyChanging; 

     public bool CanLogin 
     { 
      get { return _canLogin; } 
      set 
      { 
       _canLogin = value; 
       OnPropertyChanged(); 
      } 
     } 
     public string Status 
     { 
      get { return _status; } 
      set 
      { 
       _status = value; 
       OnPropertyChanged(); 
      } 
     } 
     public double Percent 
     { 
      get { return _percent; } 
      set 
      { 
       _percent = value; 
       OnPropertyChanged(); 
      } 
     } 
     public string Username 
     { 
      get { return _username; } 
      set 
      { 
       _username = value; 
       OnPropertyChanged(); 
      } 
     } 
     private void OnPropertyChanged([CallerMemberName] string propertyName = null) 
     { 
      var handler = PropertyChanging; 
      if (handler != null) 
       handler(this, new PropertyChangingEventArgs(propertyName)); 
     } 
    } 
}

什麼我試圖做的是綁定xmla和這個代碼，當我點擊按鈕綁定不執行。我知道這是微不足道的錯誤，但我簡單不能罰款，我試圖在網上搜索，但我失敗了。歡迎所有幫助。

來源

2014-09-05 Koko

可能是因爲您在使用INotifyPropertyChanging時應該使用INotifyPropertyChanged接口。

來源

2014-09-05 10:45:50 toadflakz

Omg我知道它我擁有你一個大碼 – Koko 2014-09-05 10:55:55

正如你所說的「微不足道的錯誤」。 ;） – toadflakz 2014-09-05 11:55:17

XMLA，數據綁定不工作

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