WCF中的MessageHeader问题

Question

我在WCF中有两个单独的消息合同：

[MessageContract(WrapperName = "GetFooRequest", WrapperNamespace = "http://whatever.services.schema")]
public class GetFooRequest
{
    [MessageHeader]
    public int ResponseType { get; set; }

    [MessageBodyMember(Order = 1)]
    public string FirstName { get; set; }

    [MessageBodyMember(Order = 1)]
    public string LastName { get; set; }
}

[MessageContract(WrapperName = "GetBarRequest", WrapperNamespace = "http://whatever.services.schema")]
public class GetBarRequest
{
    [MessageHeader]
    public int ResponseType { get; set; }

    [MessageBodyMember(Order = 1)]
    public string FirstName { get; set; }

    [MessageBodyMember(Order = 1)]
    public string LastName { get; set; }
}

这很好用，但只要我在GetBarRequest上更改MessageHeader的类型，该服务就不再有效：

[MessageHeader]
public string ResponseType { get; set; }

现在我在GetFooRequest和GetBarRequest中都有一个名为ResponseType的MessageHeader，但它们有不同的类型。该服务不再有效。为什么我在两个完全不同的消息合约上没有具有相同名称/不同类型的MessageHeader？

我得到的错误非常神秘：

Error: Cannot obtain Metadata from http://localhost:42575/Services/Test/TestService.svc If this is a Windows (R) Communication Foundation service to which you have access, please check that you have enabled metadata publishing at the specified address.  For help enabling metadata publishing, please refer to the MSDN documentation at http://go.microsoft.com/fwlink/?LinkId=65455.WS-Metadata Exchange Error    URI: http://localhost:42575/Services/Test/TestService.svc    Metadata contains a reference that cannot be resolved: 'http://localhost:42575/Services/Test/TestService.svc'.    Content Type application/soap+xml; charset=utf-8 was not supported by service http://localhost:42575/Services/Test/TestService.svc.  The client and service bindings may be mismatched.    The remote server returned an error: (415) Unsupported Media Type.HTTP GET Error    URI: http://localhost:42575/Services/Test/TestService.svc    There was an error downloading 'http://localhost:42575/Services/Test/TestService.svc'.    The underlying connection was closed: The connection was closed unexpectedly.

Answer 1

消息合约在wsdl上显示为基本类型，因此GetBarRequest和GetFooRequest看起来如下

WCF不按名称和类型验证架构，只验证名称，因此类型更改名称相同，发生以下错误

  

**操作引用已从**操作导出的消息元素[http://tempuri.org/:ResponseType]。您可以通过更改方法名称或使用OperationContractAttribute的Name属性来更改其中一个操作的名称。或者，您可以使用MessageContract编程模型更详细地控制元素名称。

[MessageHeader(Name = "TextResponseType")]
public string ResponseType { get; set; }  - Name property resolve the issue