如何使用匿名方法动态订阅事件？

Question

我正在使用LoadControl(String)动态创建许多UserControl并希望订阅其中每个事件。

我所有的控件都继承了一个公共Interface ，该Interface需要实现一个公共Event ：

public interface IObjectProcessor
{
    event EventHandler<ObjectProcessedEventArgs> ObjectProcessed;
}

因此，我接下来要进行页面加载事件：

protected void Page_Load()
{
   switch(Request["type"])
   {
     case "user":
     {
        LoadControl("AddUser.ascx", delegate(object sender, ObjectProcessedEventArgs e)
        {
           // do something
        });
        break;
     }
   }
}

private void LoadControl(string path, Action<object, ObjectProcessedEventArgs> action)
{
    var control = (IObjectProcessor)LoadControl(path)
    control.ObjectProcessed // here!
}

如何订阅此事件？

Answer 1

将Action<object, ObjectProcessedEventArgs>更改为EventHandler<ObjectProcessedEventArgs> ：

private void LoadControl(string path, EventHandler<ObjectProcessedEventArgs> handler)
{
        var control = (IObjectProcessor)LoadControl(path)
        control.ObjectProcessed += handler;
}

Answer 2

control.ObjectProcessed += action