.NET · C# · Compatibility · WCF · Web Service

Expose WCF Service as Traditional Style Web Service .asmx

WCF service can be exposed as traditional style web service .asmx. I had to do this because of integration issue with Tibco.

My setup on the WCF Service is with 2 projects:
1. WCF Service Library
2. Web Site to host the WCF Service

To expose WCF Service as .asmx web service
1.  Add these tags in your service interface declaration.

[WebServiceBinding(Name = "Service", ConformsTo = WsiProfiles.BasicProfile1_1, EmitConformanceClaims = true)]
public interface IService
    string HelloWorld();

public class Service : IService
    public string HelloWorld()
        return "Hello World!";

2. Add reference from ServiceLibrary to the Service

3. Create .asmx file in website; change class to point to the right assembly and class; remove CodeBehind attribute

<%@ WebService Language="C#" Class="ServiceLibrary.Service" %>

4. Debug and Test

Be aware that some of the WCF capabilities will not be compatible with the traditional web service .asmx.

Thanks to kjellsj. See his post here.

Cheers – Sy


5 thoughts on “Expose WCF Service as Traditional Style Web Service .asmx

  1. Thanks much, worked great. One note: the web service will have “http://tempuri.org/” as its namespace by default. The way to fix this is to add the [Webservice] attribute to the class as well as to the interface and to specify the Namespace there, as:

    [WebService(Name = “MyService”, Namespace = “http:\\MyService.net”)]
    public class MyServiceClass : IMyServiceClass

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