Exception.GetObjectData(SerializationInfo, StreamingContext) Metode

Definisi

Ruang nama:

System

Rakitan:

netstandard.dll, System.Runtime.dll

Sumber:

Exception.cs

Perhatian

This API supports obsolete formatter-based serialization. It should not be called or extended by application code.

Saat ditimpa di kelas turunan SerializationInfo , mengatur dengan informasi tentang pengecualian.

C#

[System.Obsolete("This API supports obsolete formatter-based serialization. It should not be called or extended by application code.", DiagnosticId="SYSLIB0051", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
public virtual void GetObjectData(System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context);

Parameter

info

SerializationInfo

SerializationInfo yang menyimpan data objek berseri tentang pengecualian yang dilemparkan.

context

StreamingContext

StreamingContext yang berisi informasi kontekstual tentang sumber atau tujuan.

Penerapan

GetObjectData(SerializationInfo, StreamingContext)

Atribut

ObsoleteAttribute

Pengecualian

ArgumentNullException

Parameter info adalah referensi null (Nothing dalam Visual Basic).

Contoh

Contoh kode berikut mendefinisikan kelas turunan yang dapat diserialisasikan ExceptionGetObjectDatayang mengimplementasikan , yang membuat perubahan kecil pada dua properti dan kemudian memanggil kelas dasar untuk melakukan serialisasi. Contoh memaksa kesalahan bagi-demi-0 dan kemudian membuat instans pengecualian turunan. Kode ini menserialisasikan instans ke file, mendeserialisasi file ke dalam pengecualian baru, yang dilemparkannya, lalu menangkap dan menampilkan data pengecualian.

C#

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

// Define a serializable derived exception class.
[Serializable]
class SecondLevelException : Exception, ISerializable
{
    // This public constructor is used by class instantiators.
    public SecondLevelException(string message, Exception inner) :
        base(message, inner)
    {
        HelpLink = "http://MSDN.Microsoft.com";
        Source = "Exception_Class_Samples";
    }

    // This protected constructor is used for deserialization.
    protected SecondLevelException(SerializationInfo info,
        StreamingContext context) :
            base(info, context)
    { }

    // GetObjectData performs a custom serialization.
    public override void GetObjectData(SerializationInfo info,
        StreamingContext context)
    {
        // Change the case of two properties, and then use the
        // method of the base class.
        HelpLink = HelpLink.ToLower();
        Source = Source.ToUpperInvariant();

        base.GetObjectData(info, context);
    }
}

class SerializationDemo
{
    public static void Main()
    {
        Console.WriteLine(
            "This example of the Exception constructor " +
            "and Exception.GetObjectData\nwith Serialization" +
            "Info and StreamingContext parameters " +
            "generates \nthe following output.\n");

        try
        {
            // This code forces a division by 0 and catches the
            // resulting exception.
            try
            {
                int zero = 0;
                int ecks = 1 / zero;
            }
            catch (Exception ex)
            {
                // Create a new exception to throw again.
                SecondLevelException newExcept =
                    new SecondLevelException(
                        "Forced a division by 0 and threw " +
                        "another exception.", ex);

                Console.WriteLine(
                    "Forced a division by 0, caught the " +
                    "resulting exception, \n" +
                    "and created a derived exception:\n");
                Console.WriteLine("HelpLink: {0}",
                    newExcept.HelpLink);
                Console.WriteLine("Source:   {0}",
                    newExcept.Source);

                // This FileStream is used for the serialization.
                FileStream stream =
                    new FileStream("NewException.dat",
                        FileMode.Create);

                try
                {
                    // Serialize the derived exception.
                    SoapFormatter formatter =
                        new SoapFormatter(null,
                            new StreamingContext(
                                StreamingContextStates.File));
                    formatter.Serialize(stream, newExcept);

                    // Rewind the stream and deserialize the
                    // exception.
                    stream.Position = 0;
                    SecondLevelException deserExcept =
                        (SecondLevelException)
                            formatter.Deserialize(stream);

                    Console.WriteLine(
                        "\nSerialized the exception, and then " +
                        "deserialized the resulting stream " +
                        "into a \nnew exception. " +
                        "The deserialization changed the case " +
                        "of certain properties:\n");

                    // Throw the deserialized exception again.
                    throw deserExcept;
                }
                catch (SerializationException se)
                {
                    Console.WriteLine("Failed to serialize: {0}",
                        se.ToString());
                }
                finally
                {
                    stream.Close();
                }
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine("HelpLink: {0}", ex.HelpLink);
            Console.WriteLine("Source:   {0}", ex.Source);

            Console.WriteLine();
            Console.WriteLine(ex.ToString());
        }
    }
}
/*
This example displays the following output.

Forced a division by 0, caught the resulting exception,
and created a derived exception:

HelpLink: http://MSDN.Microsoft.com
Source:   Exception_Class_Samples

Serialized the exception, and then deserialized the resulting stream into a
new exception. The deserialization changed the case of certain properties:

HelpLink: http://msdn.microsoft.com
Source:   EXCEPTION_CLASS_SAMPLES

NDP_UE_CS.SecondLevelException: Forced a division by 0 and threw another except
ion. ---> System.DivideByZeroException: Attempted to divide by zero.
   at NDP_UE_CS.SerializationDemo.Main()
   --- End of inner exception stack trace ---
   at NDP_UE_CS.SerializationDemo.Main()
*/

Keterangan

GetObjectData SerializationInfo mengatur dengan semua data objek pengecualian yang ditargetkan untuk serialisasi. Selama deserialisasi, pengecualian direkonstitusi dari yang SerializationInfo ditransmisikan melalui aliran.

Berlaku untuk

Lihat juga

• SerializationInfo
• StreamingContext