Serializes objects to the JavaScript Object Notation (JSON) and deserializes JSON data to objects. This class cannot be inherited.
Public NotInheritable Class DataContractJsonSerializer
public sealed class DataContractJsonSerializer
The DataContractJsonSerializer type exposes the following members.
Use the DataContractJsonSerializer class to serialize instances of a type into a JSON document and to deserialize a JSON document into an instance of a type. For example, you can create a type named Person with properties that contain essential data, such as a name and address. You can then create and manipulate an instance of the Person class and write all of its property values in a JSON document for later retrieval. This JSON document can later be deserialized into the Person class or another class with an equivalent data contract.
Namespace SL_DataContractJsonSerializer Partial Public Class Page Inherits UserControl Public Sub New() InitializeComponent() End Sub 'This uses an event handler, not SL data binding Private Sub OnClick(ByVal sender As Object, ByVal args As EventArgs) txtOutput1.Text = "Create a User object and serialize it." Dim json As String = WriteFromObject() txtOutput2.Text = json.ToString() ' Displays: {"Age":42,"Name":"Bob"} txtOutput3.Text = "Deserialize the data to a User object." Dim jsonString As String = "{'Name':'Bill', 'Age':53}" Dim deserializedUser As User = ReadToObject(jsonString) txtOutput4.Text = deserializedUser.Name ' Displays: Bill txtOutput5.Text = deserializedUser.Age.ToString() ' Displays: 53 End Sub ' Create a User object and serialize it to a JSON stream. Public Shared Function WriteFromObject() As String 'Create User object. Dim user As New User("Bob", 42) 'Create a stream to serialize the object to. Dim ms As New MemoryStream() ' Serializer the User object to the stream. Dim ser As New DataContractJsonSerializer(GetType(User)) ser.WriteObject(ms, user) Dim json() As Byte = ms.ToArray() ms.Close() Return Encoding.UTF8.GetString(json, 0, json.Length) End Function ' Deserialize a JSON stream to a User object. Public Shared Function ReadToObject(ByVal json As String) As User Dim deserializedUser As New User() Dim ms As New MemoryStream(Encoding.UTF8.GetBytes(json)) Dim ser As New DataContractJsonSerializer(deserializedUser.GetType()) deserializedUser = TryCast(ser.ReadObject(ms), User) ms.Close() Return deserializedUser End Function End Class <DataContract> _ Public Class User Private privateName As String <DataMember> _ Public Property Name() As String Get Return privateName End Get Set(ByVal value As String) privateName = value End Set End Property Private privateAge As Integer <DataMember> _ Public Property Age() As Integer Get Return privateAge End Get Set(ByVal value As Integer) privateAge = value End Set End Property Public Sub New() End Sub Public Sub New(ByVal newName As String, ByVal newAge As Integer) Name = newName Age = newAge End Sub End Class End Namespace
namespace SL_DataContractJsonSerializer { public partial class Page : UserControl { public Page() { InitializeComponent(); } //This uses an event handler, not SL data binding void OnClick(object sender, EventArgs args) { txtOutput1.Text = "Create a User object and serialize it."; string json = WriteFromObject(); txtOutput2.Text = json.ToString(); // Displays: {"Age":42,"Name":"Bob"} txtOutput3.Text = "Deserialize the data to a User object."; string jsonString = "{'Name':'Bill', 'Age':53}"; User deserializedUser = ReadToObject(jsonString); txtOutput4.Text = deserializedUser.Name; // Displays: Bill txtOutput5.Text = deserializedUser.Age.ToString(); // Displays: 53 } // Create a User object and serialize it to a JSON stream. public static string WriteFromObject() { //Create User object. User user = new User("Bob", 42); //Create a stream to serialize the object to. MemoryStream ms = new MemoryStream(); // Serializer the User object to the stream. DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(User)); ser.WriteObject(ms, user); byte[] json = ms.ToArray(); ms.Close(); return Encoding.UTF8.GetString(json, 0, json.Length); } // Deserialize a JSON stream to a User object. public static User ReadToObject(string json) { User deserializedUser = new User(); MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(json)); DataContractJsonSerializer ser = new DataContractJsonSerializer(deserializedUser.GetType()); deserializedUser = ser.ReadObject(ms) as User; ms.Close(); return deserializedUser; } } [DataContract] public class User { [DataMember] public string Name { get; set; } [DataMember] public int Age { get; set; } public User() { } public User(string newName, int newAge) { Name = newName; Age = newAge; } } }
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