IDataContractSurrogate.GetObjectToSerialize(Object, Type) Metod

Definition

Namnområde:
System.Runtime.Serialization
Sammansättning:
System.Runtime.Serialization.dll

Under serialiseringen returnerar ett objekt som ersätter det angivna objektet.

public:
 System::Object ^ GetObjectToSerialize(System::Object ^ obj, Type ^ targetType);
public object GetObjectToSerialize(object obj, Type targetType);
abstract member GetObjectToSerialize : obj * Type -> obj
Public Function GetObjectToSerialize (obj As Object, targetType As Type) As Object

Parametrar

obj
Object

Objektet som ska ersättas.

targetType
Type

Det Type som det ersatta objektet ska tilldelas till.

Returer

Object

Det ersatta objektet som ska serialiseras. Objektet måste vara serialiserbart av DataContractSerializer. Den måste till exempel markeras med attributet DataContractAttribute eller andra mekanismer som serialiseraren känner igen.

Exempel

I följande exempel visas en implementering av GetObjectToSerialize metoden.

public object GetObjectToSerialize(object obj, Type targetType)
{
        Console.WriteLine("GetObjectToSerialize Invoked");
        Console.WriteLine("\t type name: {0}", obj.ToString());
        Console.WriteLine("\t target type: {0}", targetType.Name);
        // This method is called on serialization.
        // If Person is not being serialized...
        if (obj is Person )
        {
            Console.WriteLine("\t returning PersonSurrogated");
            // ... use the XmlSerializer to perform the actual serialization.
            PersonSurrogated  ps = new PersonSurrogated();
            XmlSerializer xs = new XmlSerializer(typeof(Person));
            StringWriter sw = new StringWriter();
            xs.Serialize(sw, (Person)obj );
            ps.xmlData = sw.ToString();
            return ps;
        }
        return obj;
    }

Public Function GetObjectToSerialize(ByVal obj As Object, _
    ByVal targetType As Type) As Object _
    Implements IDataContractSurrogate.GetObjectToSerialize
    Console.WriteLine("GetObjectToSerialize Invoked")
    Console.WriteLine(vbTab & "type name: {0}", obj.ToString)
    Console.WriteLine(vbTab & "target type: {0}", targetType.Name)
    ' This method is called on serialization.
    ' If Person is not being serialized...
    If TypeOf obj Is Person Then
        Console.WriteLine(vbTab & "returning PersonSurrogated")
        ' ... use the XmlSerializer to perform the actual serialization.
        Dim ps As New PersonSurrogated()
        Dim xs As New XmlSerializer(GetType(Person))
        Dim sw As New StringWriter()
        xs.Serialize(sw, CType(obj, Person))
        ps.xmlData = sw.ToString()
        Return ps
    End If
    Return obj

End Function

Kommentarer

Den här metoden får inte returneras null eftersom data vid deserialisering omvandlas till typ Object och genereras InvalidCastException .

Gäller för