无法从 WCF 在 .net 核心 3 上生成 SOAP 客户端

Question

I have a web service written on WCF. I am trying to generate the client by using "Microsoft WCF Web Service Reference Provider". My project is .net core 3 web api. But I get this error Warning: Cannot import wsdl:portType Detail: An exception was thrown while running a WSDL import extension: System.ServiceModel.Description.DataContractSerializerMessageContractImporter Error: Could not load type 'System.Web.PreApplicationStartMethodAttribute' from assembly 'System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. XPath to Error Source: //wsdl:definitions[@targetNamespace=' http://tempuri.org/ ']/wsdl:portType[@name='ILiveViewService']

Why is it trying to reference System.Web? It is a framework library. It is not part of the CORE

Answer 1

I had the same problem, trying to include a new WCF, but it didn't work, with the same error above.

The conflict was between the references System.Web and Microsoft.AspNetCore.Mvc , probably when adding. It was giving conflict between both.

The solution was to remove any references from System.Web that I had on my controller.

Controller with error:

[ApiController]
public class TesteController: ControllerBase {}

Controller without error:

public class TesteController: Controller {}