Ali Daneshmandi

Thanks Laurent!

You saved my day. I am working on a SL4 app and I am going to use your MVVM Light, am I allowed to do it?

Thanks again for the help!

Hi Laurent,

Thanks for this great toolkit. Your toolkit is nice but if you add a single how to use documentation to it, it would be awesome. I know you did most of it in blog posts but if you gather them in a single doc it would be great. Thanks.

One question I have is about the Locator Class. Could you please explain more about this class and how it does the work.

It might be a stupid question but Why when I do not use the locator class and just Bind the DataContext of the main container object to the VM such as below the Command do not executed.

<UserControl 

            xmlns:vm="clr-namespace:MyApp.ViewModels"

            xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
             xmlns:cmd="clr-namespace:GalaSoft.MvvmLight.Command;assembly=GalaSoft.MvvmLight.Extras">

<UserControl.Resources>

            <vm:MainPageViewModel x:Key="MainPageViewModel"/>

</UserControl.Resources>

<Grid DataContext="{Binding MainPageViewModel}">

      <Button Content="Simple Command">
                <i:Interaction.Triggers>
                    <i:EventTrigger EventName="Click">
                        <cmd:EventToCommand Command="{Binding SimpleCommand}" />
                    </i:EventTrigger>
                </i:Interaction.Triggers>
      </Button>

</Grid>

</UserControl>

and in the MainPageViewModel class

namespace MyApp.ViewModels
{
    public class MainPageViewModel: ViewModelBase
    {

          public MainPageViewModel()
          {

               SimpleCommand= new RelayCommand(() =>
               {
                 // do sth

                Status = "SimpleCommand executed";
              });

          }

        public RelayCommand SimpleCommand
        {
            get;
            private set;
        }

}

As you see I have set the DataContext of the Grid to my VM so my button should be able to use the SimpleCommand, am I right?

Nore: The above code is just a sample. I know that the button now has built in command support now in SL4.

Thanks!