SizeToContent禁用EventTrigger

Question

我正在尝试使窗口大小与内容相同，但是当我使用SizeToContent时，由于某种原因，它会破坏我的EventTrigger，并且在加载窗口时它不再调用该命令。 / p>

代码示例： 窗口视图：

<Window x:Class="Tasks.Views.TasksWindow"
    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:Tasks.Views"
    xmlns:ViewModels="clr-namespace:Tasks.ViewModels"
    xmlns:Views="clr-namespace:Tasks.Views"
    xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
    SizeToContent="WidthAndHeight"
    mc:Ignorable="d"
    Title="TasksWindow">

    <i:Interaction.Triggers>
        <i:EventTrigger EventName="Loaded">
            <i:InvokeCommandAction Command="{Binding LoadTasksCommand}"/>
        </i:EventTrigger>
    </i:Interaction.Triggers>

    <Window.DataContext>
        <ViewModels:TasksViewModel/>
    </Window.DataContext>

    <Views:TasksControl/>
</Window>

视图模型：

public class TasksViewModel : ObservableObject
{
    private readonly ObservableCollection<TaskModel> _tasks
        = new ObservableCollection<TaskModel>();

    public IEnumerable<TaskModel> Tasks
    {
        get { return _tasks; }
    }
    public ICommand LoadTasksCommand
    {
        get { return new DelegateCommand(LoadTasks); }
    }
    public void LoadTasks()
    {
        string directory = Path.GetDirectoryName(Assembly.GetEntryAssembly().Location);
        string filePath = Path.Combine(directory, "Tasks.xml");

        // Check if save file exists
        if (!File.Exists(filePath))
            return;

        XmlSerializer xs = new XmlSerializer(typeof(TaskList));
        using (StreamReader reader = new StreamReader("Tasks.xml"))
        {
            TaskList results = (TaskList)xs.Deserialize(reader);

            foreach (var item in results.TasksList)
                _tasks.Add(item);
        }
    }
}

基地：

public class ObservableObject : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;

    protected void RaisePropertyChangedEvent(string propertyName)
    {
        var handler = PropertyChanged;
        if (handler != null)
            handler(this, new PropertyChangedEventArgs(propertyName));
    }
}

DelegateCommand：

public class DelegateCommand : ICommand
{
    private readonly Action _action;

    public DelegateCommand(Action action) { _action = action; }

    public void Execute(object parameter) { _action(); }

    public bool CanExecute(object parameter) { return true; }

    public event EventHandler CanExecuteChanged;
}

型号：

[XmlRoot("ArrayOfTaskModel")]
public class TaskList
{
    [XmlElement("TaskModel")]
    public List<TaskModel> TasksList { get; set; }
}

[Serializable]
public class TaskModel : ObservableObject
{

    private string _name;
    [XmlElement("Name")]
    public string Name
    {
        get { return _name; }
        set
        {
            _name = value;
            RaisePropertyChangedEvent("Name");
        }
    }
}