C# 将对象参数作为JSON对象发送到WCF服务方法时获取空值

C# 将对象参数作为JSON对象发送到WCF服务方法时获取空值,c#,wcf,json,rest,C#,Wcf,Json,Rest,这是我的服务方法签名: [OperationContract] [System.ServiceModel.Web.WebInvoke(UriTemplate = "/RegisterUser", Method = "POST")] void RegisterNewUser(User user); 另外,类型User在类上具有DataContract属性,在其属性上具有DataMember属性 下面是我调用服务方法的方式: String data = "{\"user\

这是我的服务方法签名:

    [OperationContract]
    [System.ServiceModel.Web.WebInvoke(UriTemplate = "/RegisterUser", Method = "POST")]
    void RegisterNewUser(User user);
另外,类型User在类上具有DataContract属性,在其属性上具有DataMember属性

下面是我调用服务方法的方式:

 String data = "{\"user\":{\"__type\" : \"User:#PingMe\",\"EmailID\": \"something@something.com\",\"RegistrationID\": \"sdfhjklsdgkdfjgklgdjfklg\"}}";  
        HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create("http://localhost:2443/NotificationService.svc/RegisterUser");
        httpWebRequest.Method = "POST";
        byte[] bytes = Encoding.UTF8.GetBytes(data);
        httpWebRequest.ContentLength = bytes.Length;
        httpWebRequest.ContentType = "text/json; charset=utf-8";
            httpWebRequest.KeepAlive = false;
        Stream requestStream = httpWebRequest.GetRequestStream();
        requestStream.Write(bytes,0,bytes.Length);
        requestStream.Close();


        HttpWebResponse httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
它成功地调用了服务方法,但在服务方法的用户参数user.EmailID和user.RegistrationID中总是出现“NULL”

你知道我在这里遗漏了什么吗

是否需要将RequestFormat属性设置为WebMessageFormat.JSON?操作中的契约属性

谢谢你改变这个

httpWebRequest.ContentType = "text/json; charset=utf-8";
为此:

httpWebRequest.ContentType = "application/json; charset=utf-8";
这是:

[System.ServiceModel.Web.WebInvoke(UriTemplate = "/RegisterUser", Method = "POST")]
为此:

[System.ServiceModel.Web.WebInvoke(UriTemplate = "/RegisterUser", Method = "POST", BodyStyle=WebMessageBodyStyle.WrappedRequest,
            ResponseFormat = WebMessageFormat.Json,
            RequestFormat = WebMessageFormat.Json)]

在服务器中增加MaxpostSize属性 我对IIS没有太多的知识,但我认为它会对你有用

 <requestLimits maxAllowedContentLength ="<length>" />


您可以发布用户类的定义吗?您是否已将[DataMember]属性设置为您的用户属性?