Enlace de control de botón WPF MVVM en DataTemplate
He visto otras preguntas relacionadas con esto, pero nunca un código explícito que describa la solución. No puedo obtener un botón dentro de mi ItemTemplate para enlazar a CUALQUIER comando en cualquier lugar. Muy frustrante. Soy un novato MVVM completo, por cierto.
Aquí está mi ventana XAML.
<Window x:Class="RET.CMS.Printing.App.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:RET.CMS.Printing.App.ViewModel"
Height="350" Width="525"
WindowStartupLocation="CenterScreen"
Title="{Binding Path=DisplayName}"
>
<Window.Resources>
<ResourceDictionary Source="MainWindowResources.xaml" />
</Window.Resources>
<Window.DataContext>
<local:MainWindowViewModel />
</Window.DataContext>
<DockPanel Margin="10">
<Grid Margin="10" DockPanel.Dock="Top">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="1*" />
<ColumnDefinition Width="1*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition />
</Grid.RowDefinitions>
<Image Grid.Column="0" MaxHeight="75" MinHeight="25" HorizontalAlignment="Left"
Source="/RET.CMS.Printing.App;component/Resources/BarkleyREI%20%283%29.png" />
<TextBlock Grid.Column="1" HorizontalAlignment="Right"
Height="30" VerticalAlignment="Top"
Style="{StaticResource TBHyperlinkStyle}"
>
Help
</TextBlock>
</Grid>
<Border Padding="10" DockPanel.Dock="Left">
<DockPanel>
<Label Style="{StaticResource H1Style}" DockPanel.Dock="Top">YOUR PRINTERS</Label>
<StackPanel Margin="10" DockPanel.Dock="Top">
<Button Style="{StaticResource RegularButton}" HorizontalAlignment="Left" Command="{Binding RefreshPrintersCommand}">Refresh List</Button>
</StackPanel>
<ListBox ItemsSource="{Binding Printers}" DockPanel.Dock="Left">
<ListBox.ItemContainerStyle>
<Style TargetType="ListBoxItem">
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
</Style>
</ListBox.ItemContainerStyle>
<ListBox.ItemTemplate>
<DataTemplate>
<Border Padding="5">
<StackPanel>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="75" />
</Grid.ColumnDefinitions>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Grid Grid.Row="0">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="50" />
</Grid.ColumnDefinitions>
<TextBlock Style="{StaticResource TBHyperlinkStyle}" Text="{Binding Printer.Name}" Grid.Column="0" Margin="2" />
<TextBlock Text="{Binding Printer.Status}" Grid.Column="1" Margin="2"/>
<Image Grid.Column="2" Margin="2" />
</Grid>
<TextBlock Text="{Binding Printer.Debug}" Grid.Row="1"/>
</Grid>
<Button Grid.Column="1" Content="Pause"
Command="{Binding Path=PausePrinterCommand}"
></Button>
</Grid>
</StackPanel>
</Border>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</DockPanel>
</Border>
</DockPanel>
Y aquí está mi ViewModel para ello:
public class MainWindowViewModel:ViewModelBase
{
#region Fields
private ObservableCollection<PrinterViewModel> _Printers = new ObservableCollection<PrinterViewModel>();
#endregion Fields
#region Properties
public ObservableCollection<PrinterViewModel> Printers
{
get
{
if(_Printers==null)
LoadPrinters();
return _Printers;
}
}
#endregion Properties
#region Constructor
public MainWindowViewModel()
{
base.DisplayName = Resources.MainWindowViewModel_DisplayName;
//bind commands
RefreshPrintersCommand = new RelayCommand(param =>this.LoadPrinters());
PausePrinterCommand = new RelayCommand( param => this.PausePrinter(param));
}
#endregion Constructor
#region Private Members
private void LoadPrinters()
{
PrintersRepository pr = new PrintersRepository(Config.SettingsLoader.GetPrintServers());
_Printers.Clear();
pr.GetPrinters().ForEach(i =>
_Printers.Add(new PrinterViewModel(i)));
OnPropertyChanged("Printers");
}
private void PausePrinter(object printerFullName)
{
var p = _Printers.Where(i => i.Printer.FullName == printerFullName as string);
}
#endregion Private Members
#region Commands
public ICommand RefreshPrintersCommand
{
get;
private set;
}
public ICommand PausePrinterCommand
{
get;
private set;
}
#endregion Commands
}
Aquí está mi PrinterViewModel:
public class PrinterViewModel:ViewModelBase
{
private Printer _Printer;
private RelayCommand _PauseCommand;
public PrinterViewModel(Printer p)
{
_Printer = p;
}
public Printer Printer { get { return _Printer; } }
public RelayCommand PauseCommand
{
get
{
if (_PauseCommand == null)
_PauseCommand = new RelayCommand(param=>_Printer.Pause());
return _PauseCommand;
}
}
}
¡Por favor ayuda! ¿Por qué no puedo obtener esto?