MVVM的Windows Phone 8命令錯誤：BindingExpression路徑錯誤：「SalvarCommand」

我的命令指向Model類而不是模型視圖MVVM的Windows Phone 8命令錯誤：BindingExpression路徑錯誤：「SalvarCommand」

System.Windows.Data錯誤：BindingExpression路徑錯誤：「SalvarCommand」屬性未找到上 'SuperListaW8.Model.ListaItem' 'SuperListaW8.Model.ListaItem'

EditListaPage.xaml

<phone:PhoneApplicationPage 
x:Class="SuperListaW8.View.EditListaPage" 
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone" 
xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone" 
xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
xmlns:wm="clr-namespace:System.Windows.Controls;assembly=WindowsPhoneWatermarkTextBoxControl" 
xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity" 
xmlns:cmd="clr-namespace:GalaSoft.MvvmLight.Command;assembly=GalaSoft.MvvmLight.Extras.WP8" 
FontFamily="{StaticResource PhoneFontFamilyNormal}" 
FontSize="{StaticResource PhoneFontSizeNormal}" 
Foreground="{StaticResource PhoneForegroundBrush}" 
SupportedOrientations="Portrait" Orientation="Portrait" 
DataContext="{Binding Source={StaticResource Locator}, Path=ListaViewModel}" 
mc:Ignorable="d" 
shell:SystemTray.IsVisible="True">

EditListaPage.xaml - >塊文本

個

<TextBox Grid.Column="1" Background="#f3f3f3" BorderBrush="#f3f3f3" VerticalAlignment="top"> 
             <i:Interaction.Triggers> 
              <i:EventTrigger EventName="TextChanged"> 
               <cmd:EventToCommand Command="{Binding Path=SalvarCommand, Mode=TwoWay}" PassEventArgsToCommand="True"/> 
              </i:EventTrigger> 
             </i:Interaction.Triggers> 
            </TextBox>

ViewModelLocator.cs

namespace SuperListaW8.ViewModel 
{ 
public class ViewModelLocator 
{ 
    public ViewModelLocator() 
    { 
     ServiceLocator.SetLocatorProvider(() => SimpleIoc.Default); 

     if (!SimpleIoc.Default.IsRegistered<IDataService>()) 
     { 
      SimpleIoc.Default.Register<IDataService, DataService>(); 
      //SimpleIoc.Default.Register<INavigationService>(() => new NavigationService());    
     } 

     SimpleIoc.Default.Register<ListaViewModel>(); 
    } 

    public ListaViewModel ListaViewModel 
    { 
     get 
     { 
      return ServiceLocator.Current.GetInstance<ListaViewModel>(); 
     } 
    } 

    public static void Cleanup() { } 
} 
}

ListaViewModel.cs

namespace SuperListaW8.ViewModel 
{ 
    public class ListaViewModel : ViewModelBase 
    { 
     public RelayCommand SalvarCommand { get; private set; } 

    public ListaViewModel(IDataService dataService) 
    { 
     _dataService = dataService; 

     SalvarCommand = new RelayCommand(() => 
     { 
      System.Diagnostics.Debugger.Break();  
     }); 
    } 
    } 
}

我的命令，正在尋求在模型中，而不是在視圖模型ListaItem ListaViewModel。誰能幫我？

來源

2013-05-20 famadori

你能說出ListBox和綁定你的ElementName引用它，並在道路使用DataContext.DetailsVisibility

<ListBox x:Name="listBox" ItemsSource="{Binding Items}"> 
    <ListBox.ItemTemplate> 
     <DataTemplate> 
      <StackPanel Orientation="Horizontal"> 
      <TextBlock Text="{Binding Title}" /> 
      <TextBlock Text="{Binding Details}" 
         Visibility="{Binding ElementName=listBox, 
              Path=DataContext.DetailsVisibilty}" /> 
     </StackPanel> 
    </DataTemplate> 
</ListBox.ItemTemplate>

來源

2013-05-20 17:06:30 famadori

MVVM的Windows Phone 8命令錯誤：BindingExpression路徑錯誤：「SalvarCommand」

回答

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