XmlObjectSerializer Classe

Définition

public ref class XmlObjectSerializer abstract

public abstract class XmlObjectSerializer

type XmlObjectSerializer = class

Public MustInherit Class XmlObjectSerializer

Héritage

Object

XmlObjectSerializer

Dérivé

System.Runtime.Serialization.DataContractSerializer

System.Runtime.Serialization.Json.DataContractJsonSerializer

System.Runtime.Serialization.NetDataContractSerializer

Exemples

L’exemple suivant montre une méthode nommée WriteObjectWithInstance qui inclut un XmlObjectSerializer paramètre. La méthode sérialise un objet à l’aide de la DataContractSerializer méthode ou NetDataContractSerializer en appelant la WriteObject méthode.

public class Test
{
    private void WriteObjectWithInstance(XmlObjectSerializer xm, Company graph,
       string fileName)
    {
        // Use either the XmlDataContractSerializer or NetDataContractSerializer,
        // or any other class that inherits from XmlObjectSerializer to write with.
        Console.WriteLine(xm.GetType());
        FileStream fs = new FileStream(fileName, FileMode.Create);
        XmlDictionaryWriter writer = XmlDictionaryWriter.CreateTextWriter(fs);
        xm.WriteObject(writer, graph);
        Console.WriteLine("Done writing {0}", fileName);
    }

    private void Run()
    {
        // Create the object to write to a file.
        Company graph = new Company();
        graph.Name = "cohowinery.com";

        // Create a DataContractSerializer and a NetDataContractSerializer.
        // Pass either one to the WriteObjectWithInstance method.
        DataContractSerializer dcs = new DataContractSerializer(typeof(Company));
        NetDataContractSerializer ndcs = new NetDataContractSerializer();
        WriteObjectWithInstance(dcs, graph, @"datacontract.xml");
        WriteObjectWithInstance(ndcs, graph, @"netDatacontract.xml");
    }

    [DataContract]
    public class Company
    {
        [DataMember]
        public string Name;
    }

    static void Main()
    {
        try
        {
            Console.WriteLine("Starting");
            Test t = new Test();
            t.Run();
            Console.WriteLine("Done");
            Console.ReadLine();
        }

        catch (InvalidDataContractException iExc)
        {
            Console.WriteLine("You have an invalid data contract: ");
            Console.WriteLine(iExc.Message);
            Console.ReadLine();
        }

        catch (SerializationException serExc)
        {
            Console.WriteLine("There is a problem with the instance:");
            Console.WriteLine(serExc.Message);
            Console.ReadLine();
        }

        catch (QuotaExceededException qExc)
        {
            Console.WriteLine("The quota has been exceeded");
            Console.WriteLine(qExc.Message);
            Console.ReadLine();
        }
        catch (Exception exc)
        {
            Console.WriteLine(exc.Message);
            Console.WriteLine(exc.ToString());
            Console.ReadLine();
        }
    }

Public Class Test
    
    Private Sub WriteObjectWithInstance(ByVal xm As XmlObjectSerializer, _
      ByVal graph As Company, ByVal fileName As String) 
        ' Use either the XmlDataContractSerializer or NetDataContractSerializer,
        ' or any other class that inherits from XmlObjectSerializer to write with.
        Console.WriteLine(xm.GetType())
        Dim fs As New FileStream(fileName, FileMode.Create)
        Dim writer As XmlDictionaryWriter = XmlDictionaryWriter.CreateTextWriter(fs)
        xm.WriteObject(writer, graph)
        Console.WriteLine("Done writing {0}", fileName)
    
    End Sub 
    
    
    Private Sub Run() 
        ' Create the object to write to a file.
        Dim graph As New Company()
        graph.Name = "cohowinery.com"
        
        ' Create a DataContractSerializer and a NetDataContractSerializer.
        ' Pass either one to the WriteObjectWithInstance method.
        Dim dcs As New DataContractSerializer(GetType(Company))
        Dim ndcs As New NetDataContractSerializer()
        WriteObjectWithInstance(dcs, graph, "datacontract.xml")
        WriteObjectWithInstance(ndcs, graph, "netDatacontract.xml")
    
    End Sub 
    
    <DataContract()>  _
    Public Class Company
        <DataMember()>  _
        Public Name As String
    End Class 
    
    
    Shared Sub Main() 
        Try
            Console.WriteLine("Starting")
            Dim t As New Test()
            t.Run()
            Console.WriteLine("Done")
            Console.ReadLine()
        
        Catch iExc As InvalidDataContractException
            Console.WriteLine("You have an invalid data contract: ")
            Console.WriteLine(iExc.Message)
            Console.ReadLine()
        
        Catch serExc As SerializationException
            Console.WriteLine("There is a problem with the instance:")
            Console.WriteLine(serExc.Message)
            Console.ReadLine()
        
        Catch qExc As QuotaExceededException
            Console.WriteLine("The quota has been exceeded")
            Console.WriteLine(qExc.Message)
            Console.ReadLine()
        Catch exc As Exception
            Console.WriteLine(exc.Message)
            Console.WriteLine(exc.ToString())
            Console.ReadLine()
        End Try
    
    End Sub 
End Class

Remarques

Étendez la XmlObjectSerializer création de votre propre sérialiseur pour sérialiser et désérialiser des objets. La classe et la DataContractSerializerNetDataContractSerializer classe héritent de l’objet XmlObjectSerializer et sont utilisés pour sérialiser et désérialiser des objets conformes aux règles de contrat de données (objets créés à l’aide du DataContractAttribute et du DataMemberAttribute).

Notes pour les responsables de l’implémentation

Lorsque vous héritez de XmlObjectSerializer, vous devez remplacer les membres suivants : WriteStartObject(XmlDictionaryWriter, Object), WriteObjectContent(XmlDictionaryWriter, Object), WriteEndObject(XmlDictionaryWriter). En outre, les méthodes et ReadObject les IsStartObject méthodes doivent être implémentées pour la lecture et la désérialisation.

Voir aussi

• DataContractSerializer
• NetDataContractSerializer
• Utilisation de contrats de données
• Sérialiseur de contrat de données