Caliburn.Micro学习笔记(五)----协同IResult

 /// <summary>
    /// Allows custom code to execute after the return of a action.
    /// </summary>
    public interface IResult {
        /// <summary>
        /// Executes the result using the specified context.
        /// </summary>
        /// <param name="context">The context.</param>
        void Execute(ActionExecutionContext context);

        /// <summary>
        /// Occurs when execution has completed.
        /// </summary>
        event EventHandler<ResultCompletionEventArgs> Completed;
    }

public class ActionExecutionContext
{
    public ActionMessage Message;
    public FrameworkElement Source;
    public object EventArgs;
    public object Target;
    public DependencyObject View;
    public MethodInfo Method;
    public Func<bool> CanExecute;
    public object this[string key];
}

    class HelloBootstrapper : Bootstrapper<MyViewModel>
    {
    }

    public class Loader : IResult
    {
        readonly string _str;
        public Loader(string str)
        {
            _str = str;
        }
        public void Execute(ActionExecutionContext context)
        {
            MessageBox.Show(_str + context.View);
            Completed(this, new ResultCompletionEventArgs());//这个方法一定要加到这里，这个方法完成后才会执行后边的方法
        }

        public event EventHandler<ResultCompletionEventArgs> Completed = (sender, args) =>
        {
            MessageBox.Show(((Loader)sender)._str );
        };
    }

<Window x:Class="CaliburnIresult.MyView"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:cal="http://www.caliburnproject.org"
        Title="MyView" Height="300" Width="300">
    <Grid>
        <Button Content="IResult"  cal:Message.Attach="MyIResultClick"/>
    </Grid>
</Window>

        public IEnumerable<IResult> MyIResultClick()
        {
            yield return new Loader("load.....");
            yield return new Loader("Ok!");
        }