ICallbackEventHandler.RaiseCallbackEvent

elwappo · November 20th, 2009, 06:55 AM

It says in the sample which is confusing:

"Note that you can replace "GetCompletionList" with a name of your choice, but the return type and parameter name and type must exactly match, including case."

Imar · November 20th, 2009, 07:03 AM

It seems related to the actual implementation of the service call. They somehow need to know what data to pass to which parameters. So, I guess it'll break when you change the names although I haven't tried it.

The project's source is open so you can fix it if you don't like the behavior... ;-)

Imar

elwappo · November 20th, 2009, 07:20 AM

Yes, it does break, as I lost a whole morning wondering why my calls to the web method wouldn't work even though my signature was the same in terms of data types....I'd named my parameters differently!

Oh and another strange about their implemtation is that they say the web method return type must be a string array, but I changed it to an arraylist just to test their theory, and it works fine! Very strange!

Imar · November 20th, 2009, 07:33 AM

Both are serialized pretty much the same, as an array. In the case of a string array, it's type is specified as a string:

<s:complexType name="ArrayOfString"...
... name="string" nillable="true" type="s:string"

When using an ArrayList, you get the same, but untyped:

<s:complexType name="ArrayOfAnyType" ...
... name="anyType" nillable="true" />

So, I guess from a client perspective you can treat the two as the same if you're expecting / passing strings.

If you find it cleaner, you can also use List<string> as it serializes in exactly the same was a string array does...

Imar