如何在iOS设备和ASP.NET URL之间发送和接收JSON POST？

Question

我正在开发一个需要与Windows服务器共享数据的iDevice应用程序。我在Web上查看了一些示例，并提出了下面列出的实现。 iOS应用程序将JSON发送到Web服务器并接收JSON响应。但是，回应并不是我所期望的。我收到{"d": "{\"name\": \"John Doe\", \"email\": \"test@gmail.com\"}"}而不是{\"name\": \"John Doe\", \"email\": \"test@gmail.com\"}知道“d”来自何处？

iOS代码：

-(void)checkWithServer {
    NSOperationQueue *queue = [[NSOperationQueue alloc] init];
    NSURL *postURL = [NSURL URLWithString: @"http://texas/WebSite3/Service.asmx/doSomething"];
    NSDictionary *jsonDict = [[NSDictionary alloc] initWithObjectsAndKeys:
                              @"test@gmail.com", @"email",
                              @"John Doe", @"name",
                              nil];

    NSError *error;
    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:jsonDict options:0 error:&error];

    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL: postURL
                                                           cachePolicy: NSURLRequestUseProtocolCachePolicy
                                                       timeoutInterval: 60.0];

    [request setHTTPMethod: @"POST"];
    [request setValue: @"application/json" forHTTPHeaderField: @"Accept"];
    [request setValue: @"application/json; charset=utf-8" forHTTPHeaderField: @"content-type"];
    [request setHTTPBody: jsonData];

    [NSURLConnection sendAsynchronousRequest: request
                                       queue: queue
                           completionHandler: ^(NSURLResponse *response, NSData *data, NSError *error) {
                               if (error || !data) {
                                   // Handle the error
                               } else {
                                   // Handle the success
                               }
                           }
     ];
}

网络服务器代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Web.Script.Services;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Json;
using System.Xml;
using System.Xml.Linq;
using System.Data;
using System.Data.SqlClient;

[WebService(Namespace = "http://texas/WebSite3")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment   the following line. 
[System.Web.Script.Services.ScriptService]
public class Service : System.Web.Services.WebService
{
    public Service () {

    //Uncomment the following line if using designed components 
    //InitializeComponent(); 
    }

    [WebMethod]
    [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
    public string doSomething(string email, string name)
    {
        return "{\"name\": \"" + name + "\", \"email\": \"" + email + "\"}";
    }
}

显然，网络服务器非常智能，可以将JSON分开并分配变量名称和电子邮件。