c# - RESTful WCF json 请求和 json 响应返回 null

Question

我正在尝试为 RESTful WCF 构建一个示例。请求和响应是 JSON。我得到的回应是：

{"FirstName":null,"LastName":null}

我需要得到适当的回应。

这是代码：

Web.config 有 Restful 的配置：

服务合同：

[OperationContract]
        [WebInvoke(UriTemplate = "Data", 
            ResponseFormat = WebMessageFormat.Json)]
        person getData(person name);

执行：

public person getData(person name)
{
    return new person{ FirstName= name.FirstName, LastName= name.LastName };
}

[DataContract]

public class person 
{

[DataMember]
public string FirstName;

[DataMember]
public string LastName;
}

客户：

class Program
{
static void Main(string[] args)
{
            string baseAddress = "http://localhost/RESTfulService";
 SendRequest(baseAddress + "/Data", "POST", "application/json", @"{""getData"" : {""name"" :{""FirstName"":""John"", ""LastName"":""Doe""}}");
}

  public static string SendRequest(string uri, string method, string contentType, string body)

    {
        string responseBody = null;

        HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(uri);
        req.Method = method;
        if (!String.IsNullOrEmpty(contentType))
        {
            req.ContentType = contentType;
        }
        if (body != null)
        {
            byte[] bodyBytes = Encoding.UTF8.GetBytes(body);
            req.GetRequestStream().Write(bodyBytes, 0, bodyBytes.Length);
            req.GetRequestStream().Close();
        }

        HttpWebResponse resp;
        try
        {
            resp = (HttpWebResponse)req.GetResponse();
        }
        catch (WebException e)
        {
            resp = (HttpWebResponse)e.Response;
        }
        Console.WriteLine("HTTP/{0} {1} {2}", resp.ProtocolVersion, (int)resp.StatusCode, resp.StatusDescription);
        foreach (string headerName in resp.Headers.AllKeys)
        {
            Console.WriteLine("{0}: {1}", headerName, resp.Headers[headerName]);
        }
        Console.WriteLine();
        Stream respStream = resp.GetResponseStream();
        if (respStream != null)
        {
            responseBody = new StreamReader(respStream).ReadToEnd();
            Console.WriteLine(responseBody);
        }
        else
        {
            Console.WriteLine("HttpWebResponse.GetResponseStream returned null");
        }
        Console.WriteLine();
        Console.WriteLine(" *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* ");
        Console.WriteLine();

        return responseBody;
    }

}

score 1 · Accepted Answer

public static string SendRequest(string uri, string method, string contentType, string body) {...}

不知何故，它只适用于“GET”方法。

对于 POST 方法，我必须在客户端以不同的方式调用服务操作：

uri = "http://localhost/RestfulService";

EndpointAddress address = new EndpointAddress(uri);
WebHttpBinding binding = new WebHttpBinding();
WebChannelFactory<IRestfulServices> factory = new WebChannelFactory<IRestfulServices>(binding, new Uri(uri));
IRestfulServices channel = factory.CreateChannel(address, new Uri(uri));

channel.getData(new Person{firstName = 'John', LastName = 'Doe'});

[ServiceContract]
public interface IRestfulService
{
    [WebInvoke(BodyStyle = WebMessageBodyStyle.WrappedRequest, UriTemplate = "Data")]
    object getData(Person name)
}

score 0 · Accepted Answer

我相信 DataContract 对象需要有一个无参数的构造函数才能使序列化程序正常工作。即 public Person() { }，您可能还需要为您的公共成员添加 getter 和 setter，public string FirstName{ get; 放; }。

score 0 · Accepted Answer

问题：

获取{ }的空 JSON 响应

界面：

[OperationContract]
[WebInvoke(Method = "GET", UriTemplate = "Client/{idsHashed}", ResponseFormat = WebMessageFormat.Json)]
Summary GetClientDataById(string idsHashed);

网络方法：

public Summary GetClientDataById(string idsHashed)
{
    Summary clientSum = new Summary().GetClientDataById(clientId);
    return clientSum;
}

在课堂上，我已将字段变为内部和私有！！！

public class Summary
{
    private string clientName { get; set; }  //<--  wont be rendered out as json because its private

解决方案：

检查类属性是公共的。

score 0 · Accepted Answer

1.restful wcf不需要方法名。2.Json反序列化器不需要参数名，它把它当作属性名。所以使用{""name"" :{""FirstName"":""John"", ""LastName"":""Doe""}"而不是 {""getData"" : {""name"" :{""FirstName"":""John"", ""LastName"":""Doe""}}.

c# - RESTful WCF json 请求和 json 响应返回 null

4 回答 4

Related

Reference