CODEWITHSUNDEEP
.netadd-in
Razor
Razor

Reputation: 17498

.NET AddIn development

I'm writing a program that allows developers to write AddIn's for it and I'd like developers to be able to hook into events happening in the program.

My code isn't compiling because I can't declare a delegate in the IMyProgram interface.

So I suppose this is more of a design question. How would you go about getting an interface passed to the AddIn so the AddIn can hook into program events?

[AddInContract]
    public interface IMyProgramAddInContract : IContract {

        /// <summary>
        /// Initializes AddIn
        /// </summary>
        void Init(IMyProgram instance);

        System.Drawing.Image AddInIcon { get; }

        String DisplayName { get; }

        String Description { get; }
    }

    [AddInContract]
    public interface IMyProgram : IContract {

        public delegate EventHandler EmailEventHandler(object sender, EmailEventArgs args);

        public event EmailEventHandler BeforeCheck;
        public event EmailEventHandler AfterCheck;
        public event EmailEventHandler EmailDownloaded;
        public event EmailEventHandler OnProcessMessage;

    }

    [AddInBase]
    public class EmailEventArgs : EventArgs {

        public override string ToString() {
            return "todo";
        }
    }

Upvotes: 1

Views: 403

Answers (3)

Razor
Razor

Reputation: 17498

Problem has been solved.

I had no idea delegates can be declared at the namespace level without being in a class.

Upvotes: 3

Gunny
Gunny

Reputation: 1166

If you're looking to implement an eventing model for your Addins, then you should use delegates instead of interfaces - check out this blurb from MSDN to see if it clears anything up:

When to Use Delegates Instead of Interfaces (C# Programming Guide)

Upvotes: 3

Gutzofter
Gutzofter

Reputation: 2023

IMyProgram is declaring a scope of public for the delegate and the events. Remove them, and I think you will be able to compile

Upvotes: 1

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