数据集，以JSON使用C＃/ VB.Net

Question

我有以下数据的数据集：

我想这个数据转换成JSON的格式如下：

{ 
    "Resource": [ 
     { 
      "resourceID": "1", 
      "resourceName": "Jonathan", 
      "Customer": [ 
       { 
        "customerID": "1", 
        "firstName": "Alec", 
        "lastName": "Stewart", 
        "Appointments": [ 
         { 
          "appointmentID": "1", 
          "startDate": "01-01-2015", 
          "endDate": "01-01-2015" 
         }, 
         { 
          "appointmentID": "2", 
          "startDate": "01-01-2015", 
          "endDate":"01-01-2015", 
         } 
        ] 
       }, 
       { 
        "customerID": "2", 
        "firstName": "Chris", 
        "lastName": "Douglas", 
        "Appointments": [ 
         { 
          "appointmentID": "3", 
          "startDate": "01-01-2015", 
          "endDate": "01-01-2015", 
         } 
        ] 
       } 
      ] 
     }, 
     { 
      "resourceID": "2", 
      "resourceName": "Matthew", 
      "Customer": [ 
       { 
        "customerID": "3", 
        "firstName": "Shirley", 
        "lastName": "Graham", 
        "Appointments": [ 
         { 
          "appointmentID": "4", 
          "startDate": "01-01-2015", 
          "endDate": "01-01-2015", 
         }, 
         { 
          "appointmentID": "5", 
          "startDate": "01-01-2015", 
          "endDate": "01-01-2015" 
         } 
        ] 
       }, 
       { 
        "customerID": "4", 
        "firstName": "Ricardo", 
        "lastName": "Powell", 
        "Appointments": [ 
         { 
          "appointmentID": "6", 
          "startDate": "01-01-2015", 
          "endDate": "01-01-2015" 
         } 
        ] 
       } 
      ] 
     } 
    ] 
} 

有什么更快的方式，我可以在VB.Net中使用它直接转换为JSON？我是否应该创建类并列出并迭代数据集来创建嵌套类的对象，然后对其进行序列化，或者以不同的方式实现它？有人能告诉我有关将数据集序列化为JSON的方式吗？我对C＃也很好。

Answer 1

你需要有嵌套类象下面这样：

[Serializable] 
public class Resource 
{ 
    public string resourceID { get; set; } 
    public string resourceName { get; set; } 
    public List<Customer> Customers { get; set; } 
} 

public class Customer 
{ 
    public string customerID { get; set; } 
    public string firstName { get; set; } 
    public string lastName { get; set; } 
    public List<Appointment> Appointments { get; set; } 
} 

public class Appointment 
{ 
    public string appointmentID { get; set; } 
    public string startDate { get; set; } 
    public string endDate { get; set; } 
} 

您填充在类中的数据后，您可以使用JavaScriptSerializer类，它已经像下面System.Web.Script.Serialization的一部分：

var resources = new List<Resource>(); 
//populate resources data here 

JavaScriptSerializer serializer = new JavaScriptSerializer(); 
serializer.MaxJsonLength = Int32.MaxValue; 
var resourceJSON = serializer.Serialize(resources); //result 

//你可以使用下面的代码填充资源类：

// Fill the DataSet 
DataSet dataSet = new DataSet("tblResources"); 
adapter.Fill(dataSet); 

//Populate nested class base on DataSet 
var resources = new List<Resource>(); 

string currentResourceID = string.Empty; 
string currentCustomerID = string.Empty; 
int totalRows = dataSet.Tables[0].Rows.Count; 

var resource = new Resource(); 
var customer = new Customer(); 
var customers = new List<Customer>(); 
var appointments = new List<Appointment>(); 
bool newResource = false; 
bool newCustomer = false; 

for (int i = 0; i < totalRows; i++) 
{ 
    var resourceID = dataSet.Tables[0].Rows[i]["resourceID"].ToString(); 
    var resourceName = dataSet.Tables[0].Rows[i]["resourceName"].ToString(); 
    var customerID = dataSet.Tables[0].Rows[i]["customerID"].ToString(); 
    var firstName = dataSet.Tables[0].Rows[i]["firstName"].ToString(); 
    var lastName = dataSet.Tables[0].Rows[i]["lastName"].ToString(); 
    var appointmentID = dataSet.Tables[0].Rows[i]["appointmentID"].ToString(); 
    var startDate = dataSet.Tables[0].Rows[i]["startDate"].ToString(); 
    var endDate = dataSet.Tables[0].Rows[i]["endDate"].ToString(); 

    if (!currentResourceID.Equals(resourceID)) 
    { 
     currentResourceID = resourceID; 

     resource = new Resource() 
     { 
      resourceID = resourceID, 
      resourceName = resourceName 
     }; 

     resources.Add(resource); 

     newResource = true; 
    } 
    else 
    { 
     newResource = false; 
    } 

    if (newResource) 
    { 
     customers = new List<Customer>(); 

     resource.Customers = customers; 
     currentCustomerID = string.Empty; 

    } 

    if (!currentCustomerID.Equals(customerID)) 
    { 
     currentCustomerID = customerID; 

     customer = new Customer() 
     { 
      customerID = customerID, 
      firstName = firstName, 
      lastName = lastName 
     }; 


     customers.Add(customer); 

     newCustomer = true; 
    } 
    else 
    { 
     newCustomer = false; 
    } 

    if (newCustomer) 
    { 
     appointments = new List<Appointment>(); 

     customer.Appointments = appointments; 

    } 

    var appointment = new Appointment() 
    { 
     appointmentID = appointmentID, 
     startDate = startDate, 
     endDate = endDate 
    }; 

    appointments.Add(appointment); 

} 

//Convert nested class to json 
JavaScriptSerializer serializer = new JavaScriptSerializer(); 
serializer.MaxJsonLength = Int32.MaxValue; 
var resourceJSON = serializer.Serialize(resources); 

Answer 2

用于.NET <> JSON Newtonsofts JSON在http://www.newtonsoft.com/json。它可以做所有事情，并满足您的需求！

Answer 3

如前所述，newtonsoft是一个真正的美丽。你可以这样做：

string json = JsonConvert.SerializeObject(yourdataset, Formatting.Indented); 

Answer 4

如上所述，你可以使用NewtonSoft。但是这没有默认行为。为了创建更通用的解决方案，你可以为Newtonsoft编写一个Custom JsonConverter。并为您的项目实施一个干净的方式来序列化或反序列化。

查看范例：http://blog.maskalik.com/asp-net/json-net-implement-custom-serialization/或http://www.newtonsoft.com/json/help/html/CustomJsonConverter.htm。