Caliburn Micro Win8.1 App - No target found for method X - xaml

Question

I'm a xaml novice and pretty new to WPF/Store apps. I tried to create a simple example of Caliburn Micro (compiled on the recent code) for a Windows 8.1 Store app. But I was unable to get it running as since yesterday I'm getting the error - I did tried the samples under the source I'd downloaded, they just work fine. Same I tried to create from scratch, it throws the aforementioned exception.
Here is the code of the entire solution, please correct me if I've configured/used it wrong!
CalMicSample\App.xaml:
<caliburn:CaliburnApplication
x:Class="CalMicSample.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:caliburn="using:Caliburn.Micro"
RequestedTheme="Light">
</caliburn:CaliburnApplication>
CalMicSample\App.xaml.cs
using Caliburn.Micro;
using CalMicSample.ViewModels;
using CalMicSample.Views;
using System;
using System.Collections.Generic;
using Windows.ApplicationModel.Activation;
using Windows.UI.Xaml.Controls;
namespace CalMicSample
{
public sealed partial class App
{
private WinRTContainer container;
private INavigationService navigationService;
public App()
{
InitializeComponent();
}
protected override void Configure()
{
LogManager.GetLog = t => new DebugLog(t);
container = new WinRTContainer();
container.RegisterWinRTServices();
container.RegisterSharingService();
container
.PerRequest<MyTestViewModel>();
PrepareViewFirst();
}
protected override object GetInstance(Type service, string key)
{
var instance = container.GetInstance(service, key);
if (instance != null)
return instance;
throw new Exception("Could not locate any instances.");
}
protected override IEnumerable<object> GetAllInstances(Type service)
{
return container.GetAllInstances(service);
}
protected override void BuildUp(object instance)
{
container.BuildUp(instance);
}
protected override void PrepareViewFirst(Frame rootFrame)
{
navigationService = container.RegisterNavigationService(rootFrame);
}
protected override void OnLaunched(LaunchActivatedEventArgs args)
{
Initialize();
var resumed = false;
if (args.PreviousExecutionState == ApplicationExecutionState.Terminated)
{
resumed = navigationService.ResumeState();
}
if (!resumed)
DisplayRootView<MyTestView>();
}
}
}
CalMicSample\Helpers\ViewModelHelper.cs
using Caliburn.Micro;
using System;
using System.Collections.Generic;
using System.Runtime.CompilerServices;
namespace CalMicSample.Helpers
{
public static class ViewModelHelper
{
public static bool Set<TProperty>(
this INotifyPropertyChangedEx This,
ref TProperty backingField,
TProperty newValue,
[CallerMemberName] string propertyName = null)
{
if (This == null)
throw new ArgumentNullException("This");
if (string.IsNullOrEmpty(propertyName))
throw new ArgumentNullException("propertyName");
if (EqualityComparer<TProperty>.Default.Equals(backingField, newValue))
return false;
backingField = newValue;
This.NotifyOfPropertyChange(propertyName);
return true;
}
}
}
CalMicSample\Models\MonkeyMood.cs
namespace CalMicSample.Models
{
public class MonkeyMood
{
public string Message { get; set; }
public string ImagePath { get; set; }
}
}
CalMicSample\ViewModels\MyTestViewModel.cs
using Caliburn.Micro;
using CalMicSample.Helpers;
using CalMicSample.Models;
using System;
namespace CalMicSample.ViewModels
{
public class MyTestViewModel : ViewModelBase
{
private string food;
private MonkeyMood mood;
public MyTestViewModel(INavigationService navigationService)
: base(navigationService)
{
}
public string Food
{
get
{
return food;
}
set
{
this.Set(ref food, value);
}
}
public MonkeyMood Mood
{
get
{
return mood;
}
set
{
this.Set(ref mood, value);
}
}
public void FeedMonkey(string monkeyFood)
{
if (string.Compare(Food, "banana", StringComparison.CurrentCultureIgnoreCase) == 0)
{
Mood = new MonkeyMood();
Mood.Message = "Monkey is happy!";
Mood.ImagePath = #"D:\Tryouts\CaliburnMicroSample\CalMicSample\CalMicSample\Assets\monkey-happy.jpg";
}
else
{
Mood = new MonkeyMood();
Mood.Message = "Monkey is unhappy";
Mood.ImagePath = #"D:\Tryouts\CaliburnMicroSample\CalMicSample\CalMicSample\Assets\monkeysad.jpg";
}
}
public bool CanFeedMonkey(string monkeyFood)
{
return !string.IsNullOrWhiteSpace(monkeyFood);
}
}
}
CalMicSample\ViewModels\ViewModelBase.cs
using Caliburn.Micro;
namespace CalMicSample.ViewModels
{
public abstract class ViewModelBase : Screen
{
private readonly INavigationService navigationService;
protected ViewModelBase(INavigationService navigationService)
{
this.navigationService = navigationService;
}
public void GoBack()
{
navigationService.GoBack();
}
public bool CanGoBack
{
get
{
return navigationService.CanGoBack;
}
}
}
}
CalMicSample\Views\MyTestView.xaml
<Page
x:Class="CalMicSample.Views.MyTestView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:CalMicSample.Views"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:caliburn="using:Caliburn.Micro"
mc:Ignorable="d">
<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
<Grid.RowDefinitions>
<RowDefinition Height="171*"/>
<RowDefinition Height="86*"/>
<RowDefinition Height="382*"/>
<RowDefinition Height="129*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="172*"/>
<ColumnDefinition Width="328*"/>
<ColumnDefinition Width="183*"/>
</Grid.ColumnDefinitions>
<Button x:Name="FeedMonkey" Content="Feed" caliburn:Message.Attach="FeedMonkey" Grid.Column="2" HorizontalAlignment="Left" Height="72" Margin="7,7,0,0" Grid.Row="1" VerticalAlignment="Top" Width="138" FontSize="36"/>
<TextBox x:Name="txtFood" Grid.Column="1" HorizontalAlignment="Left" Height="66" Margin="10,10,0,0" Grid.Row="1" TextWrapping="Wrap" Text="Banana" VerticalAlignment="Top" Width="636" FontSize="36"/>
<TextBlock x:Name="lblFeedMonkey" Grid.Column="1" HorizontalAlignment="Left" Margin="10,119,0,5" TextWrapping="Wrap" Text="Give some food to the monkey" Width="636" FontSize="36" FontWeight="Bold"/>
<TextBlock x:Name="lblMonkeyMood" Grid.Column="1" HorizontalAlignment="Center" Margin="59,25,37,10" Grid.Row="3" TextWrapping="Wrap" VerticalAlignment="Center" Height="94" Width="560" FontSize="72"/>
<Image x:Name="imgMonkey" Grid.Column="1" HorizontalAlignment="Left" Height="362" Margin="10,10,0,0" Grid.Row="2" VerticalAlignment="Top" Width="636"/>
</Grid>
</Page>
CalMicSample\Views\MyTestView.xaml.cs
using Windows.UI.Xaml.Controls;
// The Blank Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=234238
namespace CalMicSample.Views
{
/// <summary>
/// An empty page that can be used on its own or navigated to within a Frame.
/// </summary>
public sealed partial class MyTestView : Page
{
public MyTestView()
{
this.InitializeComponent();
}
}
}

Answer 1

Your feedmonkey method in your vm wants a string parameter, but your not supplying one when attaching to your button. See here for more info: http://caliburnmicro.codeplex.com/wikipage?title=Cheat%20Sheet

Answer 2

Rob is correct, you need to match the method signature of your FeedMonkey(string monkeyFood), at the moment so `Caliburn.Micro' is unable to locate the correct method.
You'd want to use something like:
// You wouldn't want to use a hard coded string, but this is how you'd do it.
caliburn:Message.Attach="FeedMonkey('banana')"
// Or you can pass some of the special values linked in Rob's answer (the Caliburn docs).
// You'd probably want a sub property, depending on what it was you were passing.
caliburn:Message.Attach="FeedMonkey($dataContext)"