c＃字典作为哈希表的值

Question

我必须编写一个小小的C＃控制台应用程序（但我的.NET知识几乎为NULL）来向PHP API发出POST请求，为此我使用HttpClient实例。该API接受这样

{ 
    "User": { 
     "email": "email@host.com", 
     "password": "something" 
    }, 
    "Establishment": { 
     "id": 147 
    } 
} 

一个JSON做就怎么做一些这方面的研究是我到目前为止已经完成后是这样的：

 static async Task RunAsync() 
     { 
      using (var client = new HttpClient()) 
      { 
       client.BaseAddress = new Uri("http://italdelo.web.development.co/"); 
       client.DefaultRequestHeaders.Accept.Clear(); 
       client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json")); 

       try 
       { 
        // HTTP POST 
        Dictionary<string, string> user = new Dictionary<string, string>(); 
        Dictionary<string, int> establishment = new Dictionary<string, int>(); 
        HashTable postdata = new HashTable(); 

        user.Add("email","email@host.com"); 
        user.Add("password","something"); 
        establishment.Add("id",147); 
        postdata.Add("User",user); 
        postdata.Add("Establishment",establishment); 


        HttpResponseMessage response = await client.PostAsJsonAsync("apiname/service", postdata); 
        response.EnsureSuccessStatusCode(); // Throw if not a success code. 
       } 
       catch (HttpRequestException e) 
       { 
        Console.WriteLine("Exception details: " + e.ToString()); 
       } 
      } 
     } 

运行这段代码，我得到这个错误信息：

Severity Code Description Project File Line Suppression State Error CS0246 The type or namespace name 'HashTable' could not be found (are you missing a using directive or an assembly reference?) ProjectName C:\Users\...\Program.cs 47 Active 

我知道错误是我想要设置的JSON发送到API，这是一个包含值（哈希表的键值符号）辞书散列表的方式。我很确定这是愚蠢的，但我真的不知道如何设置这个JSON的API，我没有选择，我需要使用C＃。你能帮我请给我一些关于如何解决这个问题的建议，或以另一种方式完成这项工作吗？提前致谢。

Answer 1

您可以创建一个类，作为使用API​​的参数。

//you classes 
public class Parameter 
{ 
    public User user { get; set;} 
    public Establishment {get; set;} 
} 
public class User 
{ 
    public string email {get; set;} 
    public string password {get; set} 
} 

public class Establishment 
{ 
    public int id {get;set;} 
} 

//你的API调用方法：

`var p = new Parameter 
     { 
      Establishment = new Establishment 
      { 
       id = 123 
      }, 
      User = new User 
      { 
       email = "email", 
       password = "password" 
      } 
     }; 

HttpResponseMessage response = await client.PostAsJsonAsync("apiname/service", p);

Answer 2

使用C＃匿名类

var payload = new{ 
    User=new { 
     email= "email@host.com", 
     password= "something" 
    }, 
    Establishment=new { 
     id= 147 
    } 
} 

然后用newtonsoft json.net

var json = JsonConvert.SerializeObject(payload); 

Answer 3

看起来像一个错字，C＃的Hashtable不利用中间的T：

https://msdn.microsoft.com/en-us/library/system.collections.hashtable(v=vs.110).aspx