serializeobject - ¿Cómo convierto un objeto C#en una cadena JSON en.NET?

string to json c#

Question

Tengo clases como estas:

class MyDate
{
int year, month, day;
}
class Lad
{
string firstName;
string lastName;
MyDate dateOfBirth;
}

Y me gustaría convertir un objeto Lad en una cadena JSON como esta:

{
"firstName":"Markoff",
"lastName":"Chaney",
"dateOfBirth":
{
"year":"1901",
"month":"4",
"day":"30"
}
}

(sin el formato). Encontré este enlace , pero utiliza un espacio de nombres que no está en .NET 4. También escuché sobre JSON.NET , pero su sitio parece estar inactivo en este momento, y no estoy interesado en usar archivos DLL externos. ¿Hay otras opciones además de crear manualmente un escritor de cadenas JSON?

Answer 1

Hay una utilidad realmente ingeniosa aquí: http://csharp2json.io/

Answer 2

Podría usar la clase msdn.microsoft.com/en-us/library/… (agregar referencia a System.Web.Extensions ):

using System.Web.Script.Serialization;

var json = new JavaScriptSerializer().Serialize(obj);

Un ejemplo completo:

using System;
using System.Web.Script.Serialization;
public class MyDate
{
public int year;
public int month;
public int day;
}
public class Lad
{
public string firstName;
public string lastName;
public MyDate dateOfBirth;
}
class Program
{
static void Main()
{
var obj = new Lad
{
firstName = "Markoff",
lastName = "Chaney",
dateOfBirth = new MyDate
{
year = 1901,
month = 4,
day = 30
}
};
var json = new JavaScriptSerializer().Serialize(obj);
Console.WriteLine(json);
}
}

Answer 3

Si está en un controlador web ASP.NET MVC es tan simple como:

string ladAsJson = Json(Lad);

No puedo creer que nadie haya mencionado esto.

Answer 4

Si no son muy grandes, ¿cuál es probablemente su caso exportarlo como Json. También esto lo hace portátil entre todas las plataformas.

 using Newtonsoft.Json;
[TestMethod]
public void ExportJson()
{
double[,] b = new double[,] {
{ 110, 120, 130, 140, 150 },
{ 1110, 1120, 1130, 1140, 1150 },
{ 1000, 1, 5 ,9, 1000},
{1110, 2, 6 ,10,1110},
{1220, 3, 7 ,11,1220},
{1330, 4, 8 ,12,1330} };
string jsonStr = JsonConvert.SerializeObject(b);
Console.WriteLine(jsonStr);
string path = "X://Programming//workspaceEclipse//PyTutorials//src//tensorflow_tutorials//export.txt";
File.WriteAllText(path, jsonStr);
}

Answer 5

Tan fácil como esto, funciona también para objetos dinámicos (tipo de objeto):

string json = new
System.Web.Script.Serialization.JavaScriptSerializer().Serialize(MYOBJECT);

Answer 6

Tenga cuidado de crear su clase con el atributo correcto también:

Cree esta clase con el atributo <Serializable> según el ejemplo de ejemplo de C # seguido de vb.net exmpale

DO#

using Microsoft.VisualBasic;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Diagnostics;
using System.Web;
using System.Web.Script.Serialization;
namespace Samples
{
[Serializable()]
public class Customer
{
private int _idcustomer;
public int IDCustomer {
get { return _idcustomer; }
set { _idcustomer = value; }
}
private System.DateTime _RegistrationDate;
public System.DateTime RegistrationDate {
get { return _RegistrationDate; }
set { _RegistrationDate = value; }
}
private string _Name;
public string Name {
get { return _Name; }
set { _Name = value; }
}
private string _Surname;
public string Surname {
get { return _Surname; }
set { _Surname = value; }
}
}
[Serializable()]
public class Product
{
private int _ProductID;
public int ProductID {
get { return _ProductID; }
set { _ProductID = value; }
}
private string _ProductName;
public string ProductName {
get { return _ProductName; }
set { _ProductName = value; }
}
private int _Price;
public int Price {
get { return _Price; }
set { _Price = value; }
}
private bool _inStock;
public bool inStock {
get { return _inStock; }
set { _inStock = value; }
}
}
[Serializable()]
public class Order
{
private int _OrderId;
public int OrderID {
get { return _OrderId; }
set { _OrderId = value; }
}
private int _customerID;
public int CustomerID {
get { return _customerID; }
set { _customerID = value; }
}
private List<Product> _ProductsList;
public List<Product> ProductsList {
get { return _ProductsList; }
set { _ProductsList = value; }
}
private System.DateTime _PurchaseDate;
public System.DateTime PurchaseDate {
get { return _PurchaseDate; }
set { _PurchaseDate = value; }
}
private string _PaymentMethod;
public string PaymentMethod {
get { return _PaymentMethod; }
set { _PaymentMethod = value; }
}
public string ToJson()
{
string json = string.Empty;
JavaScriptSerializer js = new JavaScriptSerializer();
json = js.Serialize(this);
js = null;
return json;
}
}
}

EJEMPLO VBNET

Imports System
Imports System.Web
Imports System.Web.Script.Serialization
Namespace Samples
<Serializable()>
Public Class Customer
Private _idcustomer As Integer
Public Property IDCustomer() As Integer
Get
Return _idcustomer
End Get
Set(ByVal value As Integer)
_idcustomer = value
End Set
End Property
Private _RegistrationDate As Date
Public Property RegistrationDate() As Date
Get
Return _RegistrationDate
End Get
Set(ByVal value As Date)
_RegistrationDate = value
End Set
End Property
Private _Name As String
Public Property Name() As String
Get
Return _Name
End Get
Set(ByVal value As String)
_Name = value
End Set
End Property
Private _Surname As String
Public Property Surname() As String
Get
Return _Surname
End Get
Set(ByVal value As String)
_Surname = value
End Set
End Property
End Class
<Serializable()>
Public Class Product
Private _ProductID As Integer
Public Property ProductID() As Integer
Get
Return _ProductID
End Get
Set(ByVal value As Integer)
_ProductID = value
End Set
End Property
Private _ProductName As String
Public Property ProductName() As String
Get
Return _ProductName
End Get
Set(ByVal value As String)
_ProductName = value
End Set
End Property
Private _Price As Integer
Public Property Price() As Integer
Get
Return _Price
End Get
Set(ByVal value As Integer)
_Price = value
End Set
End Property
Private _inStock As Boolean
Public Property inStock() As Boolean
Get
Return _inStock
End Get
Set(ByVal value As Boolean)
_inStock = value
End Set
End Property
End Class
<Serializable>
Public Class Order
Private _OrderId As Integer
Public Property OrderID() As Integer
Get
Return _OrderId
End Get
Set(ByVal value As Integer)
_OrderId = value
End Set
End Property
Private _customerID As Integer
Public Property CustomerID() As Integer
Get
Return _customerID
End Get
Set(ByVal value As Integer)
_customerID = value
End Set
End Property
Private _ProductsList As List(Of Product)
Public Property ProductsList() As List(Of Product)
Get
Return _ProductsList
End Get
Set(ByVal value As List(Of Product))
_ProductsList = value
End Set
End Property
Private _PurchaseDate As Date
Public Property PurchaseDate() As Date
Get
Return _PurchaseDate
End Get
Set(ByVal value As Date)
_PurchaseDate = value
End Set
End Property
Private _PaymentMethod As String
Public Property PaymentMethod() As String
Get
Return _PaymentMethod
End Get
Set(ByVal value As String)
_PaymentMethod = value
End Set
End Property
Public Function ToJson() As String
Dim json As String = String.Empty
Dim js As New JavaScriptSerializer
json = js.Serialize(Me)
js = Nothing
Return json
End Function
End Class

Espacio de nombres final

El segundo paso es crear una prueba simple como esta:

DO#

 void Main() {
List<Samples.Product> ListProducts = new List<Samples.Product>();
ListProducts.Add(new Samples.Product(), With, {.inStock=False,.Price=10, .ProductID=1,.ProductName=BookOne);
ListProducts.Add(new Samples.Product(), With, {.inStock=False,. Price=10, .ProductID=2, .ProductName=Hotels California);
ListProducts.Add(new Samples.Product(), With, {.inStock=False,.Price=10,.ProductID=3,.ProductName=Cbr);
ListProducts.Add(new Samples.Product(), With, {.inStock=False,.Price=10,.ProductID=4,.ProductName=Mustang);
ListProducts.Add(new Samples.Product(), With, {.inStock=False,.Price=10, .ProductID=15,.ProductName=Anything);
ListProducts.Add(new Samples.Product(), With, {.inStock=False,.Price=10,.ProductID=38,.ProductName=Monster Truck);
Samples.Customer Customer = new Samples.Customer();
// With...
Customer.IDCustomer = 1;
Customer.Name = "Customer1";
Customer.RegistrationDate = Now;
Customer.Surname = "SurnameCustomer";
Samples.Order Order = new Samples.Order();
// With...
Order.CustomerID = Customer.IDCustomer;
Order.OrderID = 1;
Order.PaymentMethod = "PayPal";
Order.ProductsList = ListProducts;
Order.PurchaseDate = Now;
Console.WriteLine(Order.ToJson);
Console.ReadLine();
}

VB.NET

Sub Main()
Dim ListProducts As New List(Of Samples.Product)
ListProducts.Add(New Samples.Product With {.inStock = False, .Price = 10,
.ProductID = 1, .ProductName = "BookOne"})
ListProducts.Add(New Samples.Product With {.inStock = False, .Price = 10,
.ProductID = 2, .ProductName = "Hotels California"})
ListProducts.Add(New Samples.Product With {.inStock = False, .Price = 10,
.ProductID = 3, .ProductName = "Cbr"})
ListProducts.Add(New Samples.Product With {.inStock = False, .Price = 10,
.ProductID = 4, .ProductName = "Mustang"})
ListProducts.Add(New Samples.Product With {.inStock = False, .Price = 10,
.ProductID = 15, .ProductName = "Anything"})
ListProducts.Add(New Samples.Product With {.inStock = False, .Price = 10,
.ProductID = 38, .ProductName = "Monster Truck"})
Dim Customer As New Samples.Customer
With {.IDCustomer = 1, .Name = "Customer1",.RegistrationDate = Now, .Surname ="SurnameCustomer"}
Dim Order As New Samples.Order With {
.CustomerID = Customer.IDCustomer,
.OrderID = 1,
.PaymentMethod = "PayPal",
.ProductsList = ListProducts,
.PurchaseDate = Now
}
Console.WriteLine(Order.ToJson)
Console.ReadLine()
End Sub

Y este es el resultado final:

{"OrderID":1,"CustomerID":1,"ProductsList":[{"ProductID":1,"ProductName":"BookOn
e","Price":10,"inStock":false},{"ProductID":2,"ProductName":"Hotels California",
"Price":10,"inStock":false},{"ProductID":3,"ProductName":"Cbr","Price":10,"inSto
ck":false},{"ProductID":4,"ProductName":"Mustang","Price":10,"inStock":false},{"
ProductID":15,"ProductName":"Anything","Price":10,"inStock":false},{"ProductID":
38,"ProductName":"Monster Truck","Price":10,"inStock":false}],"PurchaseDate":"//
Date(1396642206155)//","PaymentMethod":"PayPal"}

Recuerde agregar una referencia a system.web.extension.dll para lograr su objetivo.

Answer 7

Use estas herramientas para generar la clase C #, luego use este código para serializar su objeto

 var json = new JavaScriptSerializer().Serialize(obj);

Answer 8

Utilice el siguiente código para convertir XML a JSON.

var json = new JavaScriptSerializer().Serialize(obj);

Answer 9

Utilice la biblioteca Json.Net , puede descargarla desde Nuget Packet Manager.

Serialización a Json String:

 var obj = new Lad
{
firstName = "Markoff",
lastName = "Chaney",
dateOfBirth = new MyDate
{
year = 1901,
month = 4,
day = 30
}
};
var jsonString = Newtonsoft.Json.JsonConvert.SerializeObject(obj);

Deserialización al objeto:

var obj = Newtonsoft.Json.JsonConvert.DeserializeObject<Lad>(jsonString );

Answer 10

Utilice la clase DataContractJsonSerializer : MSDN1 , MSDN2 .

Mi ejemplo: HERE .

También puede deserializar con seguridad los objetos de una cadena JSON, a diferencia de JavaScriptSerializer . Pero personalmente prefiero Json.NET .

Answer 11

Votaría por JSON Serializer de ServiceStack:

using ServiceStack.Text
string jsonString = new { FirstName = "James" }.ToJson();

También es el serializador JSON más rápido disponible para .NET: http://www.servicestack.net/benchmarks/

Answer 12

Wooou Realmente mejor usando un framework JSON :)

Aquí está mi ejemplo usando Json.NET ( http://james.newtonking.com/json ):

using System;
using System.Collections.Generic;
using System.Text;
using Newtonsoft.Json;
using System.IO;
namespace com.blogspot.jeanjmichel.jsontest.model
{
public class Contact
{
private Int64 id;
private String name;
List<Address> addresses;
public Int64 Id
{
set { this.id = value; }
get { return this.id; }
}
public String Name
{
set { this.name = value; }
get { return this.name; }
}
public List<Address> Addresses
{
set { this.addresses = value; }
get { return this.addresses; }
}
public String ToJSONRepresentation()
{
StringBuilder sb = new StringBuilder();
JsonWriter jw = new JsonTextWriter(new StringWriter(sb));
jw.Formatting = Formatting.Indented;
jw.WriteStartObject();
jw.WritePropertyName("id");
jw.WriteValue(this.Id);
jw.WritePropertyName("name");
jw.WriteValue(this.Name);
jw.WritePropertyName("addresses");
jw.WriteStartArray();
int i;
i = 0;
for (i = 0; i < addresses.Count; i++)
{
jw.WriteStartObject();
jw.WritePropertyName("id");
jw.WriteValue(addresses[i].Id);
jw.WritePropertyName("streetAddress");
jw.WriteValue(addresses[i].StreetAddress);
jw.WritePropertyName("complement");
jw.WriteValue(addresses[i].Complement);
jw.WritePropertyName("city");
jw.WriteValue(addresses[i].City);
jw.WritePropertyName("province");
jw.WriteValue(addresses[i].Province);
jw.WritePropertyName("country");
jw.WriteValue(addresses[i].Country);
jw.WritePropertyName("postalCode");
jw.WriteValue(addresses[i].PostalCode);
jw.WriteEndObject();
}
jw.WriteEndArray();
jw.WriteEndObject();
return sb.ToString();
}
public Contact()
{
}
public Contact(Int64 id, String personName, List<Address> addresses)
{
this.id = id;
this.name = personName;
this.addresses = addresses;
}
public Contact(String JSONRepresentation)
{
//To do
}
}
}

La prueba:

using System;
using System.Collections.Generic;
using com.blogspot.jeanjmichel.jsontest.model;
namespace com.blogspot.jeanjmichel.jsontest.main
{
public class Program
{
static void Main(string[] args)
{
List<Address> addresses = new List<Address>();
addresses.Add(new Address(1, "Rua Dr. Fernandes Coelho, 85", "15º andar", "São Paulo", "São Paulo", "Brazil", "05423040"));
addresses.Add(new Address(2, "Avenida Senador Teotônio Vilela, 241", null, "São Paulo", "São Paulo", "Brazil", null));
Contact contact = new Contact(1, "Ayrton Senna", addresses);
Console.WriteLine(contact.ToJSONRepresentation());
Console.ReadKey();
}
}
}

El resultado:

{
"id": 1,
"name": "Ayrton Senna",
"addresses": [
{
"id": 1,
"streetAddress": "Rua Dr. Fernandes Coelho, 85",
"complement": "15º andar",
"city": "São Paulo",
"province": "São Paulo",
"country": "Brazil",
"postalCode": "05423040"
},
{
"id": 2,
"streetAddress": "Avenida Senador Teotônio Vilela, 241",
"complement": null,
"city": "São Paulo",
"province": "São Paulo",
"country": "Brazil",
"postalCode": null
}
]
}

Ahora implementaré el método del constructor que recibirá una cadena JSON y llenará los campos de la clase.

Answer 13

Serializador

 public static void WriteToJsonFile<T>(string filePath, T objectToWrite, bool append = false) where T : new()
{
var contentsToWriteToFile = JsonConvert.SerializeObject(objectToWrite, new JsonSerializerSettings
{
Formatting = Formatting.Indented,
});
using (var writer = new StreamWriter(filePath, append))
{
writer.Write(contentsToWriteToFile);
}
}

Objeto

namespace MyConfig
{
public class AppConfigurationSettings
{
public AppConfigurationSettings()
{
/* initialize the object if you want to output a new document
* for use as a template or default settings possibly when
* an app is started.
*/
if (AppSettings == null) { AppSettings=new AppSettings();}
}
public AppSettings AppSettings { get; set; }
}
public class AppSettings
{
public bool DebugMode { get; set; } = false;
}
}

Implementación

var jsonObject = new AppConfigurationSettings();
WriteToJsonFile<AppConfigurationSettings>(file.FullName, jsonObject);

Salida

{
"AppSettings": {
"DebugMode": false
}
}

Answer 14

Ya que a todos nos gusta un liners

... este depende del paquete Newtonsoft NuGet, que es popular y mejor que el serializador predeterminado.

Newtonsoft.Json.JsonConvert.SerializeObject(new {foo = "bar"})

Documentación: Serialización y Deserialización de JSON