WCF 异步 Web 服务问题

Question

I'm having several issues with my WCF client in that the client Reference.cs is empty and the only error I get on the build is the useless generic message:

Severity Code Description Project File Line Suppression State Warning Custom tool warning: Cannot import wsdl:portType Detail: An exception was thrown while running a WSDL import extension: System.ServiceModel.Description.DataContractSerializerMessageContractImporter Error: The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) XPath to Error Source: //wsdl:definitions[@targetNamespace='http://tempuri.org/']/wsdl:portType[@name='IBrokerWcf'] MyWeb.Setup C:\Users\me\Projects\MyWeb 3.x\MyWeb v3.x\MyWeb.Setup\Service References\BrokerWcfSvc\Reference.svcmap 1

When I load the Service in the WCF Test Client, all of the advertised async methods error out (see image) with "This Operation is not supported in the WCF Test Client because it uses type System.Threading.Tasks.Task'1"

All of this previously worked fine. Not sure what changed to send it all sideways.

Answer 1

System.ServiceModel.Description.DataContractSerializerMessageContractImporter Error: The located assembly's manifest definition does not match the assembly reference.

As the error says, the manifest definition of the locating assembly does not match the assembly reference. You need to check the components. Did you click "Reuse types in referenced assemblies" when adding a service reference.

This Operation is not supported in the WCF Test Client because it uses type System.Threading.Tasks.Task'1"

The "error" you are seeing is just a limitation of the test tool that comes with visual studio, both functions call the same server side function so there is no compelling force to make Microsoft add support. There is no actual error. If you really want to test the async version you will need to write your own test client that calls the function.
Error : not supported in WCF Test client because it uses type System.Threading.Tasks