Question

I trying to use MVVM in some silverlight modal that i wrote –
I wrote the view – and the viewmodel part – but i need to make the command between them and i don’t know how to do it.

In the view i have single button that will launch the command.

How to do it ?

Thanks for the help.

Answer 1

In View Model

private RelayCommand _Command;
public RelayCommand Command
{
  get
  {
    if (_Command == null)
    {
      _Command= new RelayCommand(() =>
      {
      });
    }
    return _Command;
  }
  private set { }
}

USE PARAMETERS

private RelayCommand<string> _Command;
public RelayCommand<string> Command
{
  get
  {
    if (_Command == null)
    {
      _Command= new RelayCommand<string>((X) =>
      {
      });
    }
    return _Command;
  }
  private set { }
}

In View

xmlns:i=”clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity”
xmlns:gs_cmd=”clr-namespace:GalaSoft.MvvmLight.Command;assembly=GalaSoft.MvvmLight.Extras.SL4″

<Button  Grid.Row="1" Grid.Column="1" Margin="4" HorizontalAlignment="Right" Name="btnSelect" Content="..." Width="25" Height="25" TabIndex="2">
                                        <i:Interaction.Triggers>
                                            <i:EventTrigger EventName="Click">
                                                <gs_cmd:EventToCommand Command="{Binding Path=Command,Mode=OneWay}"/>
                                            </i:EventTrigger>
                                        </i:Interaction.Triggers>
                                    </Button>