JSON的WCF REST POST:参数为空 [英] WCF REST POST of JSON: Parameter is empty

问题描述

使用Fiddler将JSON消息发布到WCF服务.该服务使用System.ServiceModel.Activation.WebServiceHostFactory

Using Fiddler I post a JSON message to my WCF service. The service uses System.ServiceModel.Activation.WebServiceHostFactory

[OperationContract]
[WebInvoke
(UriTemplate = "/authenticate",
       Method = "POST",
       ResponseFormat = WebMessageFormat.Json,
       BodyStyle = WebMessageBodyStyle.WrappedRequest
       )]
String Authorise(String usernamePasswordJson);

进行POST时，我可以破解代码，但是参数 usernamePasswordJson 为空.为什么会这样?

When the POST is made, I am able to break into the code, but the parameter usernamePasswordJson is null. Why is this?

注意:刚好当我将 BodyStyle 设置为 Bare 时，该帖子甚至没有得到我要调试的代码.

Note: Strangly when I set the BodyStyle to Bare, the post doesn't even get to the code for me to debug.

这是提琴手屏幕:

推荐答案

您将参数声明为String类型，因此它需要一个JSON字符串-并且您正在向其传递JSON对象.

You declared your parameter as type String, so it is expecting a JSON string - and you're passing a JSON object to it.

要接收该请求，您需要拥有与以下合同相似的合同:

To receive that request, you need to have a contract similar to the one below:

[ServiceContract]
public interface IMyInterface
{
    [OperationContract]
    [WebInvoke(UriTemplate = "/authenticate",
           Method = "POST",
           ResponseFormat = WebMessageFormat.Json,
           BodyStyle = WebMessageBodyStyle.Bare)]
    String Authorise(UserNamePassword usernamePassword);
}

[DataContract]
public class UserNamePassword
{
    [DataMember]
    public string UserName { get; set; }
    [DataMember]
    public string Password { get; set; }
}

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