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PODependency Injection not working
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8825606
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8826088
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2012-01-11T19:42:49.137
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2012-01-12T00:41:27.927
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2012-01-11T20:03:28.923
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I have been learning MVVM / WPF and have gone through the tutorial <a href="http://msdn.microsoft.com/en-us/magazine/dd419663.aspx" rel="nofollow">here</a>. I have created a working application using this methodology but now, on a new project, I cannot get the Dependency Injection to work. When I run this project I get an empty MainWindow without the CompanyView injected. I have double and tripled checked everything between the project that works and this one that doesn't and cannot find the reason for CompanyView not being injected. I have also tried cleaning the solution and restarting VS to no avail. Hopefully someone can see what I am missing. I have the following file: App.xaml.cs (using base.OnStartup() instead of StartupUri in App.xaml) <pre><code>namespace SidekickAdmin { /// <summary> /// Interaction logic for App.xaml /// </summary> public partial class App : Application { protected override void OnStartup(StartupEventArgs e) { base.OnStartup(e); MainWindow window = new MainWindow(); var viewModel = new MainWindowViewModel(); window.DataContext = viewModel; window.Show(); } } } </code></pre> MainWindowViewModel.cs <pre><code>namespace SidekickAdmin.ViewModel { class MainWindowViewModel : ViewModelBase { public MainWindowViewModel() { CompanyViewModel companyViewModel = new CompanyViewModel(_repository); this.ViewModels.Add(companyViewModel); } ObservableCollection<ViewModelBase> _viewModels; ObservableCollection<ViewModelBase> ViewModels { get { if (_viewModels == null) { _viewModels = new ObservableCollection<ViewModelBase>(); } return _viewModels; } } } } </code></pre> MainWindowView.xaml <pre><code><Window x:Class="SidekickAdmin.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:vm="clr-namespace:SidekickAdmin.ViewModel" xmlns:vw="clr-namespace:SidekickAdmin.View" Title="Sidekick Admin" SizeToContent="WidthAndHeight">  <Window.Resources> <ResourceDictionary Source="MainWindowResources.xaml" /> </Window.Resources> <StackPanel> <ItemsControl ItemsSource="{Binding ViewModel}" Margin="3" /> </StackPanel> </Window> </code></pre> MainWindowResources.xaml <pre><code><ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:vm="clr-namespace:SidekickAdmin.ViewModel" xmlns:vw="clr-namespace:SidekickAdmin.View"> <DataTemplate DataType="{x:Type vm:CompanyViewModel}"> <vw:CompanyView /> </DataTemplate> </ResourceDictionary> </code></pre> CompanyViewModel.cs (not really used yet as I am still trying to just get the view to appear) <pre><code>namespace SidekickAdmin.ViewModel { class CompanyViewModel : ViewModelBase { readonly GenericRepository _repository; #region Getters & Setters public ObservableCollection<Company> AllCompanies { get; private set; } #endregion #region Constructors public CompanyViewModel(GenericRepository repository) { if (repository == null) { throw new ArgumentNullException("repository"); } _repository = repository; this.AllCompanies = new ObservableCollection<Company>(_repository.GetAll<Company>()); } #endregion protected override void OnDispose() { this.AllCompanies.Clear(); } } } </code></pre> CompanyView.xaml <pre><code><UserControl x:Class="SidekickAdmin.View.CompanyView" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" mc:Ignorable="d" Height="300" Width="300"> <StackPanel> <TextBlock>You say Hello</TextBlock> <TextBlock>And I say Goodbye</TextBlock> <TextBlock>Hello, Hello</TextBlock> </StackPanel> </UserControl> </code></pre>
Tags
<wpf><mvvm><dependency-injection>
Title
Dependency Injection not working
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1. PO
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1. USBrianKE
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