SurrogateSelector SurrogateSelector SurrogateSelector SurrogateSelector Class

Definition

Unterstützt Formatierungsprogrammen bei der Auswahl eines Serialisierungsersatzes, an den der Serialisierungs- oder Deserialisierungsvorgang delegiert werden soll.Assists formatters in selection of the serialization surrogate to delegate the serialization or deserialization process to.

public ref class SurrogateSelector : System::Runtime::Serialization::ISurrogateSelector
[System.Runtime.InteropServices.ComVisible(true)]
public class SurrogateSelector : System.Runtime.Serialization.ISurrogateSelector
type SurrogateSelector = class
    interface ISurrogateSelector
Public Class SurrogateSelector
Implements ISurrogateSelector
Vererbung
SurrogateSelectorSurrogateSelectorSurrogateSelectorSurrogateSelector
Abgeleitet
Attribute
Implementiert

Beispiele

Im folgenden Codebeispiel wird veranschaulicht, wie Sie eine serialisierungsprojektklasse erstellen, die weiß, wie eine Klasse, die nicht selbst serialisierbar ist, ordnungsgemäß serialisiert oder deserialisiert werden kann.The following code example shows how to make a serialization surrogate class that knows how to properly serialize or deserialize a class that is not itself serializable. Außerdem wird in diesem Beispiel gezeigt, wie Sie eine Wiederherstellung SerializationExceptionaus einer durch finden.In addition, this example also shows how to recover from a SerializationException.

using System;
using System.IO;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters;
using System.Runtime.Serialization.Formatters.Binary;


// This class is not serializable.
class Employee 
    {
    public String name, address;

    public Employee(String name, String address) 
    {
        this.name = name;
        this.address = address;
    }
}

// This class can manually serialize an Employee object.
sealed class EmployeeSerializationSurrogate : ISerializationSurrogate 
{

    // Serialize the Employee object to save the object's name and address fields.
    public void GetObjectData(Object obj, 
        SerializationInfo info, StreamingContext context) 
    {

        var emp = (Employee) obj;
        info.AddValue("name", emp.name);
        info.AddValue("address", emp.address);
    }

    // Deserialize the Employee object to set the object's name and address fields.
    public Object SetObjectData(Object obj,
        SerializationInfo info, StreamingContext context,
        ISurrogateSelector selector) 
    {

        var emp = (Employee) obj;
        emp.name = info.GetString("name");
        emp.address = info.GetString("address");
        return emp;
    }
}

public sealed class App 
{
    static void Main() 
    {
        // This sample uses the BinaryFormatter.
        IFormatter formatter = new BinaryFormatter();

        // Create a MemoryStream that the object will be serialized into and deserialized from.
        using (Stream stream = new MemoryStream()) 
        {
            // Create a SurrogateSelector.
            var ss = new SurrogateSelector();

            // Tell the SurrogateSelector that Employee objects are serialized and deserialized 
            // using the EmployeeSerializationSurrogate object.
            ss.AddSurrogate(typeof(Employee),
            new StreamingContext(StreamingContextStates.All),
            new EmployeeSerializationSurrogate());

            // Associate the SurrogateSelector with the BinaryFormatter.
            formatter.SurrogateSelector = ss;

            try 
            {
                // Serialize an Employee object into the memory stream.
                formatter.Serialize(stream, new Employee("Jeff", "1 Microsoft Way"));
            }
            catch (SerializationException e) 
            {
                Console.WriteLine("Serialization failed: {0}", e.Message);
                throw;
            }

            // Rewind the MemoryStream.
            stream.Position = 0;

            try 
            {
                // Deserialize the Employee object from the memory stream.
                var emp = (Employee) formatter.Deserialize(stream);

                // Verify that it all worked.
                Console.WriteLine("Name = {0}, Address = {1}", emp.name, emp.address);
            }
            catch (SerializationException e) 
            {
                Console.WriteLine("Deserialization failed: {0}", e.Message);
                throw;
            }
        }
    }
}

// This code produces the following output.
//
// Name = Jeff, Address = 1 Microsoft Way

Hinweise

Ein Ersatz Zeichen für die Serialisierung gibt den Benutzern ein Objekt, das die Serialisierungsanforderungen eines anderen Objekts verarbeiten kann und die serialisierten Daten ggf. transformieren kann.A serialization surrogate gives the users an object that can handle the serialization requirements of a different object and can transform the serialized data if necessary.

Konstruktoren

SurrogateSelector() SurrogateSelector() SurrogateSelector() SurrogateSelector()

Initialisiert eine neue Instanz der SurrogateSelector-Klasse.Initializes a new instance of the SurrogateSelector class.

Methoden

AddSurrogate(Type, StreamingContext, ISerializationSurrogate) AddSurrogate(Type, StreamingContext, ISerializationSurrogate) AddSurrogate(Type, StreamingContext, ISerializationSurrogate) AddSurrogate(Type, StreamingContext, ISerializationSurrogate)

Fügt der Liste der überprüften Ersatzelemente ein Ersatzelement hinzu.Adds a surrogate to the list of checked surrogates.

ChainSelector(ISurrogateSelector) ChainSelector(ISurrogateSelector) ChainSelector(ISurrogateSelector) ChainSelector(ISurrogateSelector)

Fügt der Liste der Ersatzelemente den angegebenen ISurrogateSelector hinzu, der einen bestimmten Objekttyp behandeln kann.Adds the specified ISurrogateSelector that can handle a particular object type to the list of surrogates.

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Bestimmt, ob das angegebene Objekt mit dem aktuellen Objekt identisch ist.Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Fungiert als Standardhashfunktion.Serves as the default hash function.

(Inherited from Object)
GetNextSelector() GetNextSelector() GetNextSelector() GetNextSelector()

Gibt den nächsten Selektor in der Kette der Selektoren zurück.Returns the next selector on the chain of selectors.

GetSurrogate(Type, StreamingContext, ISurrogateSelector) GetSurrogate(Type, StreamingContext, ISurrogateSelector) GetSurrogate(Type, StreamingContext, ISurrogateSelector) GetSurrogate(Type, StreamingContext, ISurrogateSelector)

Gibt den Ersatz für einen bestimmten Typ zurück.Returns the surrogate for a particular type.

GetType() GetType() GetType() GetType()

Ruft den Type der aktuellen Instanz ab.Gets the Type of the current instance.

(Inherited from Object)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Erstellt eine flache Kopie des aktuellen Object.Creates a shallow copy of the current Object.

(Inherited from Object)
RemoveSurrogate(Type, StreamingContext) RemoveSurrogate(Type, StreamingContext) RemoveSurrogate(Type, StreamingContext) RemoveSurrogate(Type, StreamingContext)

Entfernt den Ersatz, der einem angegebenen Typ zugeordnet ist.Removes the surrogate associated with a given type.

ToString() ToString() ToString() ToString()

Gibt eine Zeichenfolge zurück, die das aktuelle Objekt darstellt.Returns a string that represents the current object.

(Inherited from Object)

Gilt für: