DataMemberAttribute.EmitDefaultValue Property
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Gets or sets a value that specifies whether to serialize the default value for a field or property being serialized.
Assembly: System.Runtime.Serialization (in System.Runtime.Serialization.dll)
Property Value
Type: System.Booleantrue if the default value for a member should be generated in the serialization stream; otherwise, false. The default is true.
In .NET Framework, types have a concept of default values. For example, for any reference type the default value is Nothing (Nothing in Visual Basic), and for an integer type it is 0. It is occasionally desirable to omit a data member from the serialized data when it is set to its default value. To do this, set the EmitDefaultValue property to false (it is true by default).
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Setting the EmitDefaultValue property to false is not a recommended practice. It should be done only if there is a specific requirement to do so (such as for interoperability or to reduce data size). |
' Define the data contract. <DataContract(Name := "Customer", Namespace := "http://www.contoso.com")> _ Public Class User Private privateName As String <DataMember(Name := "Last", EmitDefaultValue := True, IsRequired := True, Order := 2)> _ 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(Order := 1)> _ 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
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