[Mono-aspnet-list] creating new web service from wsdl

Devin Venable venable.devin at gmail.com
Thu Sep 2 10:46:15 EDT 2010

Background:  Linux developer new to .NET.  In the past I've successfully
deployed simple web services by creating asmx files and running them under
Apache via XSP.
Need: Create web service implementation from WSDL defined by 3rd party

This is what I've tried so far...

1. Used wsdl2 to generate server stubs.

wsdl2 -server MyServices.wsdl
Web Services Description Language Utility
Mono Framework v2.0.50727.1433

There where some warnings while generating the code:

    - This web reference does not conform to WS-I Basic Profile v1.1
        R2718: A wsdl:binding in a DESCRIPTION MUST have the same set of
        wsdl:operations as the wsdl:portType to which it refers.
          * Binding 'BasicHttpBinding_IMyServices', in Service Description

(should this warning make me nervous?)

2. Renamed resulting cs file to MyServices.asmx
3. Added header to file:

<%@ WebService Language="c#" Codebehind="MyServices.asmx.cs"
Class="MyServices" %>

This KINDA worked.  I can load up and view the page in my browser:


But when I try to invoke a method on the service from the web forms that
display, I get a message like:

*500 - Internal Server Error*
System.MissingMethodException: Cannot create an abstract class 'MyServices'.
  at System.Activator.CheckAbstractType (System.Type type) [0x00000]
  at System.Activator.CreateInstance (System.Type type, Boolean
nonPublic) [0x00000]
  at System.Activator.CreateInstance (System.Type type) [0x00000]
  at System.Web.Services.Protocols.WebServiceHandler.CreateServerInstance
() [0x00000]
  at System.Web.Services.Protocols.HttpSimpleWebServiceHandler.Invoke
(System.Web.Services.Protocols.LogicalMethodInfo method,
System.Object[] parameters) [0x00000]
  at System.Web.Services.Protocols.HttpSimpleWebServiceHandler.ProcessRequest
(System.Web.HttpContext context) [0x00000]

Though I'm not a .NET developer, I'm a developer and can see why trying to
create an instance of an abstract class would be an issue.  What I'm not
clear on is what is the best
pattern to implement the concrete methods.   I've tried implementing a
concrete class with all of the methods in the asmx and made the class
inherit from the class generated by
wsdl2, but when I run the application, the methods disappear.  I'm guessing
I need to copy all of the blocks that look like this into the concrete

http://tempuri.org/IGTPServices/EnrollTransmitter", RequestNamespace="
http://tempuri.org/", ResponseNamespace="http://tempuri.org/",
    [return: System.Xml.Serialization.XmlElementAttribute(IsNullable=true)]

If anyone can point me to a short tutorial for creating a web service in
Mono using an existing WSDL, or give me tips herre, I would appreciate it.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.ximian.com/pipermail/mono-aspnet-list/attachments/20100902/1099c608/attachment-0001.html 

More information about the Mono-aspnet-list mailing list