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Created Unassigned: Type not found in cache error [7612]

dolowoyo — Tue, 18 Jun 2013 17:08:59 GMT

I am running into the below error the first time my ViewModel is being instantiated by the SimpleIoC. I believe I have setup the container as it should be, but for some reason, I am still getting the below error. Any ideas or assistance would be very much appreciated.

```
Microsoft.Practices.ServiceLocation.ActivationException was unhandled by user code
HResult=-2146233088
Message=Type not found in cache: Windows.UI.Xaml.Controls.Frame.
Source=GalaSoft.MvvmLight.Extras
StackTrace:
at GalaSoft.MvvmLight.Ioc.SimpleIoc.DoGetService(Type serviceType, String key) in c:\Users\Public\Downloads\CodePlex\MVVMLight\GalaSoft.MvvmLight\GalaSoft.MvvmLight.Extras (NET35)\Ioc\SimpleIoc.cs:line 532
at GalaSoft.MvvmLight.Ioc.SimpleIoc.GetService(Type serviceType) in c:\Users\Public\Downloads\CodePlex\MVVMLight\GalaSoft.MvvmLight\GalaSoft.MvvmLight.Extras (NET35)\Ioc\SimpleIoc.cs:line 768
at GalaSoft.MvvmLight.Ioc.SimpleIoc.MakeInstance[TClass]() in c:\Users\Public\Downloads\CodePlex\MVVMLight\GalaSoft.MvvmLight\GalaSoft.MvvmLight.Extras (NET35)\Ioc\SimpleIoc.cs:line 708
InnerException:

```

Here are pieces of my code related to this:

ViewModelLocator.cs (Located in my Win8 project)

```
public class ViewModelLocator
{
/// <summary>
/// Initializes a new instance of the ViewModelLocator class.
/// </summary>
public ViewModelLocator()
{
ServiceLocator.SetLocatorProvider(() => SimpleIoc.Default);

if (ViewModelBase.IsInDesignModeStatic)
{
// Create design time view services and models
//SimpleIoc.Default.Register<IDataService, DesignDataService>();
}
else
{
// Create run time view services and models
//SimpleIoc.Default.Register<IDataService, DataService>();
SimpleIoc.Default.Register<INavigationService, NavigationService>();
SimpleIoc.Default.Register<IParseService, ParseService>();
SimpleIoc.Default.Register<IServiceHandler, ServiceHandler>();
}

SimpleIoc.Default.Register<MainViewModel>();
SimpleIoc.Default.Register<ActionViewModel>();
}

public MainViewModel MainVM
{
get
{
return ServiceLocator.Current.GetInstance<MainViewModel>();
}
}

public ActionViewModel ActionVM
{
get
{
return ServiceLocator.Current.GetInstance<ActionViewModel>();
}
}

public static void Cleanup()
{
// TODO Clear the ViewModels
}
}
```

MainViewModel.cs Constructor

```
public class MainViewModel : ViewModelBase
{
#region Variables

private readonly INavigationService _navigationService;
private readonly IParseService _parseService;

#endregion

/// <summary>
/// Initializes a new instance of the MainViewModel class.
/// </summary>
public MainViewModel(INavigationService navigationService, IParseService parseService)
{
if (IsInDesignMode)
{
// Code runs in Blend --> create design time data.
}
else
{
_navigationService = navigationService;
_parseService = parseService;
BuildCommonData();
}
}
...
```

Commented Issue: Implement [CallerMemberName] for RaisePropertyChanged [7603]

lbugnion — Wed, 12 Jun 2013 06:57:17 GMT

Hi it would be great to have a propertychanged call with the callermembername attribute for .net 4.5 applications

http://msdn.microsoft.com/en-us/library/system.runtime.compilerservices.callermembernameattribute.aspx

```
protected virtual void RaiseThisChanged([CallerMemberName] string propertyName = "")
{
VerifyPropertyName(propertyName);

var handler = PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs(propertyName));
}
}
```

But it would be better to name it to RaiseThisChanged or something because you wouldn't be able to use the normal RaisePropertyChanged("Property") call.
Comments: Hey there, This is already implemented, i will publish with V4.2. Expect a preview on Codeplex very soon with other improvements. cheers Laurent

Commented Issue: Implement [CallerMemberName] for RaisePropertyChanged [7603]

Havremunken — Wed, 12 Jun 2013 06:02:16 GMT

Hi it would be great to have a propertychanged call with the callermembername attribute for .net 4.5 applications

http://msdn.microsoft.com/en-us/library/system.runtime.compilerservices.callermembernameattribute.aspx

```
protected virtual void RaiseThisChanged([CallerMemberName] string propertyName = "")
{
VerifyPropertyName(propertyName);

var handler = PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs(propertyName));
}
}
```

But it would be better to name it to RaiseThisChanged or something because you wouldn't be able to use the normal RaisePropertyChanged("Property") call.
Comments: +1 here. Apparently this is an efficient way to do things, please support. :)

Created Unassigned: MVVM Light Toolkit V4 RTM - Missing Shapes in Blend Expression 4 [7611]

chobo2 — Mon, 10 Jun 2013 21:43:27 GMT

Hi

I made a MVVM light 7.1 project in VS 2010, I then opened it up in Blend 4.

I only see 2 shapes. If I make a non MVVM light project I see about 16 shapes.

Why am I missing these shapes?

Created Unassigned: EventToCommand xaml error, "A value of type 'EventToCommand' cannot be added to a collection or dictionary of type 'TriggerActionCollection'." [7610]

steelers0118 — Mon, 10 Jun 2013 15:31:27 GMT

I'm trying to implement EventToCommand within one of my views, but when I add the code (below), then I get a parser error:

"A value of type 'EventToCommand' cannot be added to a collection or dictionary of type 'TriggerActionCollection'."

Is this code configured correctly? Seems to be the same as many other online examples I've seen. Thanks in advance for any assistance.

```
xmlns:galaSoft="clr-namespace:GalaSoft.MvvmLight.Command;assembly=GalaSoft.MvvmLight.Extras.SL5"

<i:Interaction.Triggers>
<i:EventTrigger EventName="KeyDown">
<galaSoft:EventToCommand Command="{Binding Test}" PassEventArgsToCommand="True" />
</i:EventTrigger>
</i:Interaction.Triggers>
```

Commented Issue: Register throws exception when class without ctor and static field is registered [7595]

Necroman — Sun, 19 May 2013 09:51:39 GMT

See this question (http://stackoverflow.com/questions/13284526/in-winrt-static-field-not-initialized-at-all/13285323#13285323) on Stackoverflow.

The problem is the method GetConstructorInfo in the SimpleIoc class which throws an exception "Multiple constructors found but none marked with PreferredConstructor", cause the class has a default ctor and a static ctor.
Comments: Same here, I got these two constructors in MainViewModel, but I am getting exception that none has PreferredConstructor attribute: public MainViewModel() { } [PreferredConstructor] public MainViewModel(INavigationService navigationService) { _navigationService = navigationService; InitializeCommands(); }

Edited Feature: Feature request: IEventArgsConverter for EventToCommand [6908]

lbugnion — Sat, 18 May 2013 21:35:35 GMT

First I'm in the camp were it is unaccaptable to allow UI references in my ViewModel. The ViewModel should not be aware of the View and that includes references to UI elements or anything under System.Windows.Controls namespace. To allow this scenario for RelayCommands that require event arguments this new feature would be needed.

I'd like to be able to handle my event arguements in a converter before it goes to the ViewModel. As of right now the toolkit just sends whatever event arguements are defined by the UI to the ViewModel. Any class implementing IEventArgsConverter would be able intercept the event arguments from an EventToComand and output a System.Object to the wired up RelayCommand. This would work just like we already use System.Windows.Data.IValueConverter in XAML data-binding.

Commented Issue: RelayCommand fails if delegate contains a non-constant method parameter [7605]

AlexPaskhin — Sat, 18 May 2013 16:07:10 GMT

I've come across what I think is a bug in RelayCommand (at least for WPF 4.0):
* If you attempt to construct a RelayCommand with a lambda expression composed entirely of compile-time constants, e.g., __() => DoSomething(2)__, it works as expected.
* However, if the lambda expression contains a method call with a parameter, and the value passed into that parameter is determined at runtime, e.g., __() => DoSomething(number)__, nothing happens when the command is executed.

If you put the code below into a WPF 4.0 project and build it in Debug mode, you will notice that if you click "Do Something", nothing happens, but if you click "Do Something Else", a "2" appears in the output window. (Similarly, if you put a breakpoint in the DoSomething method, it will only be hit if you click "Do Something Else".)

MainWindow.xaml:

```
<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:WpfApplication1"
mc:Ignorable="d"
x:Class="WpfApplication1.MainWindow"
Title="MainWindow"
Height="400"
Width="400">
<Window.DataContext>
<local:MainWindowViewModel />
</Window.DataContext>
<StackPanel>
<Button Content="Do Something"
Command="{Binding DoSomethingCommand}" />
<Button Margin="0,10,0,0"
Content="Do Something Else"
Command="{Binding DoSomethingElseCommand}" />
</StackPanel>
</Window>
```

MainWindowViewModel.cs

```
namespace WpfApplication1
{
public class MainWindowViewModel : ViewModelBase
{
public ICommand DoSomethingCommand { get; private set; }
public ICommand DoSomethingElseCommand { get; private set; }

public MainWindowViewModel()
{
DoSomethingCommand = GetCommand(2);
DoSomethingElseCommand = new RelayCommand(() => DoSomething(2));
}

private ICommand GetCommand(int number)
{
return new RelayCommand(() => DoSomething(number));
}

private void DoSomething(int number)
{
Debug.Print(number.ToString());
}
}
}
```
Comments: Here are links: • MVVM-WPF XAML Mark-up Binding Extensions - http://wpfmvvmbindingext.codeplex.com • MVVM-WPF XAML Mark-up Dependency Injection Binding Extensions - http://wpfmvvmbindingiocext.codeplex.com They will help to solve

Commented Issue: mvvminpc snippet not available after nuget-based install? [7574]

ah_lun — Fri, 17 May 2013 16:30:52 GMT

I've created a new WPF application and used nuget to install MVVM Light. The default MainViewModel states in a comment that the "mvvminpc" snippet is available to add bindable properties.

However, typing this snippet doesn't actually do anything nor does it show up in intellisense. How can I make it available?
Comments: I am using VS Express 2012 for Windows Phone on Windows 8 Pro, installed the MVVM Light and the snippets is not showing. There is a solution to manually add the snippet, but couldn't found the folder.

Edited Unassigned: New Messenger.Default.IsRegistered<> to help debugging Messenger issues. [7609]

tryan — Tue, 07 May 2013 14:57:04 GMT

For purposes of Debugging, it would be great to include properties and methods that would help debug whether a particular message has been registered and what class(es) are registered to that message. This would help narrow down issues regarding improper registered\ unregistered of messages.

Created Unassigned: Messenger.Default.IsRegistered<> method returns whether a specific message is registered [7609]

tryan — Tue, 07 May 2013 14:56:25 GMT

Commented Issue: Windows Phone 8 Unregister error [7599]

jpack61108 — Sat, 04 May 2013 19:05:09 GMT

Commented Issue: Windows Phone 8 Unregister error [7599]

jpack61108 — Sat, 04 May 2013 18:48:00 GMT

Commented Issue: Windows Phone 8 Unregister error [7599]

jpack61108 — Sat, 04 May 2013 18:26:34 GMT

Hi,

I have been using the following code in a windows phone 7 application for some time ( using the binaries from WP71).

SimpleIOC.Default.GetInstance<viewModel>()
and
SimpleIOC.Default.Unregister(simpleIOC.Default.GetInstance<viewModel>())

In wp7 -
calling GetInstance - returns an instance of the viewmodel.
calling Unregister - removes the instance
calling GetInstance - returns a new instance.

however in WP8:
calling GetInstance - returns an instance of the viewmodel.
calling Unregister - removes the instance
calling GetInstance - returns the following error

{Microsoft.Practices.ServiceLocation.ActivationException: Type not found in cache without a key: MvvmLightTestApp.ViewModel.SecondaryViewModel
at GalaSoft.MvvmLight.Ioc.SimpleIoc.DoGetService(Type serviceType, String key)
at GalaSoft.MvvmLight.Ioc.SimpleIoc.GetInstance[TService]()
at MvvmLightTestApp.MainPage.Button_Click_1(Object sender, RoutedEventArgs e)
at System.Windows.Controls.Primitives.ButtonBase.OnClick()
at System.Windows.Controls.Button.OnClick()

Any help would be appreciated

Thanks

Comments: I am having kind of the same issue. Difference mine is on windows 8. My main page view model works perfectly and I have my secondary page view and viewModel set up the same way. When I navigate to the secondary page before the page loads I get this exception: Type not found in cache:System.String with this StackTrace: at GalaSoft.MvvmLight.Ioc.SimpleIoc.DoGetService(Type serviceType, String key) in d:\GalaSoft\mydotnet\MvvmLight\Source\GalaSoft.MvvmLight\GalaSoft.MvvmLight.Extras (NET35)\Ioc\SimpleIoc.cs:line 532 at GalaSoft.MvvmLight.Ioc.SimpleIoc.GetService(Type serviceType) in d:\GalaSoft\mydotnet\MvvmLight\Source\GalaSoft.MvvmLight\GalaSoft.MvvmLight.Extras (NET35)\Ioc\SimpleIoc.cs:line 768 at GalaSoft.MvvmLight.Ioc.SimpleIoc.MakeInstance[TClass]() in d:\GalaSoft\mydotnet\MvvmLight\Source\GalaSoft.MvvmLight\GalaSoft.MvvmLight.Extras (NET35)\Ioc\SimpleIoc.cs:line 708 I have the latest binaries installed and Visual Studio 2012 is updated to update 2. Please Help.

Commented Issue: mvvminpc snippet not available after nuget-based install? [7574]

GenFa — Sun, 28 Apr 2013 06:24:29 GMT

I've created a new WPF application and used nuget to install MVVM Light. The default MainViewModel states in a comment that the "mvvminpc" snippet is available to add bindable properties.

However, typing this snippet doesn't actually do anything nor does it show up in intellisense. How can I make it available?
Comments: Hello, Just looking for this snipped for a few minutes, before finding this post. Could you add the snipped, or a link to it in the class? Fabrice

Closed Issue: Exception, presumably because of missing class or file: WeakActionGeneric.cs [7608]

lbugnion — Thu, 18 Apr 2013 07:16:47 GMT

Edited Issue: Exception, presumably because of missing class or file: WeakActionGeneric.cs [7608]

lbugnion — Thu, 18 Apr 2013 07:16:30 GMT

Edited Unassigned: Exception, presumably because of missing class or file: WeakActionGeneric.cs [7608]

lbugnion — Thu, 18 Apr 2013 07:16:15 GMT

Commented Unassigned: Exception, presumably because of missing class or file: WeakActionGeneric.cs [7608]

lbugnion — Thu, 18 Apr 2013 07:15:54 GMT

When using a
Messenger<Something>.Send(something)
method, occasionally a popup comes, titled:
Find Source: WeakActionGeneric.cs
This file selection window starts at the following location:
d:\GalaSoft\mydotnet\MvvmLight\Source\GalaSoft.MvvmLight\GalaSoft.MvvmLight (NET35)\Helpers\WeakActionGeneric.cs

I can't find the source to that file on my computer, and so I cancel the popup. This leads to the exception, which seems to contain only the following:

System.Reflection.TargetException occurred
HResult=-2146232829
Message=Non-static method requires a target.
Source=mscorlib
StackTrace:
at System.Reflection.RuntimeMethodInfo.CheckConsistency(Object target)
InnerException:

This exception and popup become can be seen with all exception checkboxes checked in the VS2012 DEBUG -> Exceptions window. Without any checkboxes checked, a silent failure occurs.
Comments: Hi, The message you see asking to see the source code file is just a feature of the Visual Studio debugger. When an exception occurs in a referenced DLL, VS asks you where the file is (in case you have it) in order to allow you to debug. So it is not the cause of the exception, but rather a debug feature triggered by the exception. The exception itself is a duplicate of Issue 7579. Thanks Laurent

Edited Unassigned: Exception, presumably because of missing class or file: WeakActionGeneric.cs [7608]

TacoSteemers — Wed, 17 Apr 2013 13:08:23 GMT