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DataContractJsonSerializer Class

Serializes objects to the JavaScript Object Notation (JSON) and deserializes JSON data to objects. This class cannot be inherited.

System.Object
  System.Runtime.Serialization.Json.DataContractJsonSerializer

Namespace:  System.Runtime.Serialization.Json
Assembly:  System.ServiceModel.Web (in System.ServiceModel.Web.dll)

'Declaration
Public NotInheritable Class DataContractJsonSerializer

The DataContractJsonSerializer type exposes the following members.

  NameDescription
Public methodSupported by Silverlight for Windows PhoneDataContractJsonSerializer(Type)Initializes a new instance of the DataContractJsonSerializer class to serialize or deserialize an object of the specified type.
Public methodSupported by Silverlight for Windows PhoneDataContractJsonSerializer(Type, IEnumerable(Of Type))Initializes a new instance of the DataContractJsonSerializer class to serialize or deserialize an object of a specified type with a collection of known types that may be present in the object graph.
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  NameDescription
Public propertySupported by Silverlight for Windows PhoneKnownTypesGets a collection of types that may be present in the object graph serialized using this instance of the DataContractJsonSerializer.
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  NameDescription
Public methodSupported by Silverlight for Windows PhoneEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodSupported by Silverlight for Windows PhoneFinalizeAllows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection. (Inherited from Object.)
Public methodSupported by Silverlight for Windows PhoneGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodSupported by Silverlight for Windows PhoneGetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodSupported by Silverlight for Windows PhoneMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodSupported by Silverlight for Windows PhoneReadObjectReads a document stream in the JSON (JavaScript Object Notation) format and returns the deserialized object.
Public methodSupported by Silverlight for Windows PhoneToStringReturns a string that represents the current object. (Inherited from Object.)
Public methodSupported by Silverlight for Windows PhoneWriteObjectSerializes a specified object to JavaScript Object Notation (JSON) data and writes the resulting JSON to a stream.
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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



Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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