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Webservice descriptive error message for System.IndexOutOfRangeException: Index was outside the bounds of the array.

Posted on 2016-10-26
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Last Modified: 2016-11-27
I am setting up clients to use my webservice. Rather than calling it as a webservice, one has typed in the URL I gave them to use for the web service. Of course, since they are not calling it like a webservice, it is generating this error on the screen:
System.IndexOutOfRangeException: Index was outside the bounds of the array.

Is there a way I can retrieve that error and send something more descriptive to the screen. They come back to me that my webservice is broken.

I tried to step through the class, but calling it from the URL doesn't reach the class and generates the error.

Here's the complete error as it sends to the screen:
System.IndexOutOfRangeException: Index was outside the bounds of the array.
   at System.Web.Services.Protocols.HttpServerType..ctor(Type type)
   at System.Web.Services.Protocols.HttpServerProtocol.Initialize()
   at System.Web.Services.Protocols.ServerProtocolFactory.Create(Type type, HttpContext context, HttpRequest request, HttpResponse response, Boolean& abortProcessing)


I'm using asp.net , vb.net specifically if that matters.
thanks!
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Question by:Starr Duskk
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Dimitris earned 2000 total points
ID: 41862142
This exception is thrown before the request actually calls your service
It's a layer above your application and is handled internally.
I don't think that you can do anything about it
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by:Starr Duskk
ID: 41862510
Is there an error number I can detect in IIS and change the setting in IIS?
thanks!
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Expert Comment

by:Dimitris
ID: 41862818
IIS probably is able to find the end point
nevertheless, your endpoint waits for either a specific protocol or arguments that are not passed during the call (probably the contract)
therefore throws an exception (probably)
can you post some code ?
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Author Comment

by:Starr Duskk
ID: 41864212
Not sure why posting code would matter. It's simply a user who takes the URL I give them to use as their endpoint, and they paste it into their browser rather than using a webservice.

I can put a step on the class that should be called, but it never reaches the class at all. You said yourself it's a layer above the application and handled internally.

I just wonder how other businesses display intelligent messages to their users and thought I might find someone experienced with this issue. It would be applicable to every single web service out there.
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Expert Comment

by:Dimitris
ID: 41871812
as said it's the contract of the endpoint
if the contract is invalid you will not manage to initiate the call in the endpoint
Sorry, without any data , i can't be of any assistance
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