How to subscribe to an event dynamically using anonymous methods?

Question

I'm creating a number of UserControls dynamically using LoadControl(String) and want to subscribe to an event of each of them.

All my controls inherits a common Interface that require an implementation of a common Event:

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

So I do next on my page loading event:

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!
}

How to subscribe a deleagte to this event?

score 5 · Accepted Answer · edited Sep 27 '11 at 15:17

5

Change Action<object, ObjectProcessedEventArgs> to EventHandler<ObjectProcessedEventArgs>:

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

edited Sep 27 '11 at 15:17

answered Aug 14 '09 at 14:38

Kent Boogaart

175,602
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score -1 · Answer 2 · answered Aug 14 '09 at 14:40

-1

control.ObjectProcessed += action

answered Aug 14 '09 at 14:40

Dewfy

23,277
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Cannot implicitly convert type 'Action – abatishchev Aug 14 '09 at 14:44
create explicit declartion of delegate(object sender, ObjectProcessedEventArgs e) and use it as input type – Dewfy Aug 14 '09 at 14:52

How to subscribe to an event dynamically using anonymous methods?

2 Answers2