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C# - How to implement event listener from this thirdparty COM

Posted on 2014-10-01
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Last Modified: 2014-10-21
Hi,

I am using a thirdparty DLL to initiate a download.

I'm told to use the following code snippet to be notified when the download is complete.

(svxFile.saver as _IStreamCollectorEvents_Event).stopped += (collector) => 
{ 
//do something
 };

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How do I use this in a C# Console Application?  Where should it go? I cant the event to fire no matter where I put it.

Thank you

static class Program
    {
        static SVXFile file_ = new SVXFile();        

        static void Main(string[] args)
        {            
            (file_.saver as _IStreamCollectorEvents_Event).stopped += (collector) => { Console.WriteLine("Download Result: " + collector.ToString()); };
            (file_.saver as _IStreamCollectorEvents_Event).failed += (sender,error) => { Console.WriteLine("Download Result: " + error.message); };
            
            //Download code removed
            
            Console.WriteLine("Done");
            Console.Read();
        }        
    }

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Question by:mhdi
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3 Comments
 
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Expert Comment

by:käµfm³d 👽
ID: 40356207
Anywhere before you actually use the component, I suspect. I imagine Main should be fine.
0
 

Author Comment

by:mhdi
ID: 40356216
Hmm. Thats where I have it and I still can't get it to fire. What's the best way to debug these kinds of events?
0
 
LVL 75

Accepted Solution

by:
käµfm³d   👽 earned 500 total points
ID: 40356258
There nothing overly special about events. They are just special implementations of the Observer Pattern created as a language feature of .NET. You should be able to debug them like any other method. Are you certain your external component is raising the event? Is there some flag you have to set?
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