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POCustom UserControl not Loaded
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  1. POCustom UserControl not Loaded
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    copied!<p>I've build WPF MVVM Application with custom user control. I create datatemplate to bind the user control to view model (Dynamically changes via binding). When I run the application the loaded event is not fire but the element in user control is rendered, what's wrong with this ?</p> <p>Datatemplate</p> <pre><code>&lt;DataTemplate DataType="{x:Type viewmodel:MessageListViewModel}"&gt; &lt;view:MessageListView/&gt; &lt;/DataTemplate&gt; &lt;DataTemplate DataType="{x:Type viewmodel:ContactListViewModel}"&gt; &lt;view:ContactListView/&gt; &lt;/DataTemplate&gt; &lt;DataTemplate DataType="{x:Type viewmodel:FeedListViewModel}"&gt; &lt;view:FeedListView/&gt; &lt;/DataTemplate&gt; &lt;DataTemplate DataType="{x:Type viewmodel:FeedViewModel}"&gt; &lt;view:FeedView/&gt; &lt;/DataTemplate&gt; </code></pre> <p>Main.xaml</p> <pre><code>&lt;ContentControl Grid.Row="1" Margin="6" Grid.Column="1" x:Name="moduleContent" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch" Content="{Binding Path=Module, ElementName=modulesNavBar}"/&gt; </code></pre> <p>I have 3 module: Message, Contact, and Feed, Suppose the first loaded Module is MessageList</p> <p>MessageListView.xaml.cs</p> <pre><code>public partial class MessageListView: UserControl { public MessageListView() { InitializeComponent(); DataContext = new MessageListViewModel(); Loaded += new RoutedEventHandler(MessageListView_Loaded); } private void MessageListView_Loaded(object sender, RoutedEventArgs e) { MessageBox.Show("Beautiful"); // Not Fired } } </code></pre> <p>MainViewModel.cs</p> <pre><code>public class MainViewModel : ViewModelBase { private string _currentTheme = string.Empty; private object _currentModule = null; private Dictionary&lt;Modules, object&gt; _modules; public string CurrentTheme { get { return _currentTheme; } set { if (_currentTheme != value) { _currentTheme = value; RaisePropertyChanged("CurrentTheme"); } } } public object Module { get { return _currentModule; } set { if (_currentModule != value) { _currentModule = value; RaisePropertyChanged("CurrentModule"); } } } public Dictionary&lt;Modules, object&gt; ModulesCollection { get { return _modules; } private set { _modules = value; RaisePropertyChanged("ModulesCollection"); } } public ViewModelCollection ViewModelCollection { get; private set; } public MainViewModel() { ChangeThemeAction(Theme.MetropolisLightName); ViewModelCollection = new ViewModelCollection(); this._modules = new Dictionary&lt;Modules, object&gt;(); this._modules.Add(Modules.Mails, null); this._modules.Add(Modules.Contacts, null); this._modules.Add(Modules.Feeds, null); this.InitCommands(); } private void InitCommands() { this.ChangeThemeCommand = new RelayCommand&lt;string&gt;(o =&gt; this.ChangeThemeAction(o)); this.ChangeLayoutCommand = new RelayCommand(this.ChangeLayoutAction); this.CloseCommand = new RelayCommand(this.CloseAction); this.OpenContactCommand = new RelayCommand(this.OpenContactAction); this.OpenFeedCommand = new RelayCommand(this.OpenFeedAction); this.OpenMailCommand = new RelayCommand(this.OpenMailAction); } private void ChangeThemeAction(string parameter) { ThemeManager.ApplicationThemeName = parameter; _currentTheme = parameter; } private void ChangeLayoutAction() { } private void CloseAction() { System.Windows.Application.Current.MainWindow.Close(); } private void OpenContactAction() { Module = ModulesCollection[Modules.Contacts]; } private void OpenFeedAction() { Module = ModulesCollection[Modules.Feeds]; } private void OpenMailAction() { Module = ModulesCollection[Modules.Mails]; } #region Commands public ICommand ChangeThemeCommand { get; private set; } public ICommand ChangeLayoutCommand { get; private set; } public ICommand CloseCommand { get; private set; } public ICommand OpenContactCommand { get; private set; } public ICommand OpenFeedCommand { get; private set; } public ICommand OpenMailCommand { get; private set; } public ICommand SendCommand { get; private set; } #endregion } </code></pre> <p>The loaded event is not fired.</p> <p>Thanks in advance,</p> <p>Brian</p>
 

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