MVVM Light V4 beta1 : Silverlight Feeds

MVVM Light V4 beta1

by Laurent Bugnion via Silverlight on 9/12/2011 4:00:20 PM

This morning, I published MVVM Light V4 beta1 in the form of an MSI. The installation instructions are detailed on the MVVM Light installation page. Please make sure to uninstall previous versions before you install V4 beta1.

There are quite a few changes in this version, and I plan to blog about various features in the coming days. As usual, stay tuned!

Change log

General changes

Added XmlnsDefinitionAttribute for GalaSoft.MvvmLight.Command in Extras assembly.

Setup

Created an installer.

Messenger

Fixed Issue #7521: race condition in Messenger.Default.
Fixed Issue #7539: Messenger support for uncast objects.

ViewModelBase

Added support for RaisePropertyChanged(null) and RaisePropertyChanged(string.empty). A blog post about this will follow.
Fixed Issue #7520: RaisePropertyChanged() fails in ReleaseBuild. This overload was removed because of the many issues, and replaced by the Set methods.
Added Set(...) methods. A blog post about this will follow.

RelayCommand

Fixed Issue #7522: used deprecated Predicate instead of Func.
Fixed Issue #7534: RelayCommand has security issue.

SimpleIoc

Implemented method IsRegistered<T>(). A blog post about this will follow.
Fixed issue "Contains<T>() is returning true even if no instance was already instantiated". Contains<T>() only returns true if an instance is already created. IsRegistered<T>() returns true if the class has been registered with the IOC container.
Fixed issue "Instances get created at registration already when registered with a key and a factory". Registering the instance does not execute the factory method yet. The method is only executed when the method GetInstance is called the first time.
Fixed issue "Use the correct DLLs for CommonServiceLocator". The original DLLs from http://commonservicelocator.codeplex.com are now used everywhere.

DispatcherHelper

The class was moved from GalaSoft.MvvmLight.Extras.dll into GalaSoft.MvvmLight.dll.

Project Templates

A couple of internal changes to the template's structure.
Using the new slightly modified MVVM Light logo.

ViewModelLocator Template

Modified template to use SimpleIoc.
A couple of internal changes to the template's structure.
Using the new slightly modified MVVM Light logo.

ViewModel Template

A couple of internal changes to the template's structure.
Using the new slightly modified MVVM Light logo.

View Template

Fixed issue in XAML for WP7 and WP7.1 templates.
A couple of internal changes to the template's structure.
Using the new slightly modified MVVM Light logo.

INPC snippet

Setter in property is now public.
Added $end$ marker.
Added new snippets with various ways to call RaisePropertyChanged.
Added a snippet using the new ViewModelBase.Set() method.
A blog post will follow about all this.

ViewModelLocator property snippet

Added $end$ marker.
Modified to use SimpleIoc.

Relay Command snippets

Added code snippets for RelayCommands. A blog post about this will follow.

Details

XmlnsDefinitionAttribute for GalaSoft.MvvmLight.Command in Extras assembly

Thanks to the addition of XmlnsDefinitionAttribute, you can simplify the inclusion of the MVVM Light EventToCommand action in XAML. See the before and after below:

Before:

<UserControl xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity" 
             
             xmlns:cmd="clr-namespace:GalaSoft.MvvmLight.Command;assembly=GalaSoft.MvvmLight.Extras.SL4"
             
             xmlns:cmd="http://www.galasoft.ch/mvvmlight" 
             x:Class="MvvmLight4.MainPage">

After:

<UserControl xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity" 
             xmlns:cmd="http://www.galasoft.ch/mvvmlight" 
             x:Class="MvvmLight4.MainPage">