Mvvm Windows Phone 8 command Error: BindingExpression path error: 'SalvarCommand' - mvvm

Question

My commands are pointing to the Model class and not for ModelView
System.Windows.Data Error: BindingExpression path error: 'SalvarCommand' property not found on '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 --> block text
<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();
});
}
}
}
My commands are being sought in the model and not in the ViewModel ListaItem ListaViewModel. Can anyone help me?

Answer 1

You could name the ListBox and in the Binding you reference it with ElementName, and in Path you use 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>