TypeLoadException.GetObjectData(SerializationInfo, StreamingContext) Metode

Definisi

Ruang nama:

System

Rakitan:

System.Runtime.dll

Sumber:

TypeLoadException.cs

Perhatian

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

SerializationInfo Mengatur objek dengan nama kelas, nama metode, ID sumber daya, dan informasi pengecualian tambahan.

public:
 override void GetObjectData(System::Runtime::Serialization::SerializationInfo ^ info, System::Runtime::Serialization::StreamingContext context);

[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 override void GetObjectData (System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context);

[<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}")>]
override this.GetObjectData : System.Runtime.Serialization.SerializationInfo * System.Runtime.Serialization.StreamingContext -> unit

Public Overrides Sub GetObjectData (info As SerializationInfo, context As StreamingContext)

Parameter

info

SerializationInfo

Objek yang menyimpan data objek berseri.

context

StreamingContext

Informasi kontekstual tentang sumber atau tujuan.

Atribut

ObsoleteAttribute

Pengecualian

ArgumentNullException

Objeknya info adalah null.

Contoh

Contoh berikut menghasilkan pengecualian, dan menserialisasikan data pengecualian ke file, lalu menyusun ulang pengecualian. Agar contoh kode ini berjalan, Anda harus memberikan nama rakitan yang sepenuhnya memenuhi syarat. Untuk informasi tentang cara mendapatkan nama rakitan yang sepenuhnya memenuhi syarat, lihat Nama Rakitan.

#using <System.Runtime.Serialization.Formatters.Soap.dll>

using namespace System;
using namespace System::Reflection;
using namespace System::Runtime::Serialization;
using namespace System::Runtime::Serialization::Formatters::Soap;
using namespace System::IO;

// This class overrides the GetObjectData method and initializes
// its data with current time. 

[Serializable]
public ref class MyTypeLoadExceptionChild: public TypeLoadException
{
public:
   System::DateTime ErrorDateTime;
   MyTypeLoadExceptionChild()
   {
      ErrorDateTime = DateTime::Now;
   }

   MyTypeLoadExceptionChild( DateTime myDateTime )
   {
      ErrorDateTime = myDateTime;
   }


protected:
   MyTypeLoadExceptionChild( SerializationInfo^ sInfo, StreamingContext * sContext )
   {
      
      // Reconstitute the deserialized information into the instance.
      ErrorDateTime = sInfo->GetDateTime( "ErrorDate" );
   }


public:
   void GetObjectData( SerializationInfo^ sInfo, StreamingContext * sContext )
   {
      
      // Add a value to the Serialization information.
      sInfo->AddValue( "ErrorDate", ErrorDateTime );
   }

};

int main()
{
   
   // Load the mscorlib assembly and get a reference to it.
   // You must supply the fully qualified assembly name for mscorlib.dll here.
   Assembly^ myAssembly = Assembly::Load( "Assembly text name, Version, Culture, PublicKeyToken" );
   try
   {
      Console::WriteLine( "Attempting to load a type not present in the assembly 'mscorlib'" );
      
      // This loading of invalid type raises a TypeLoadException
      Type^ myType = myAssembly->GetType( "System::NonExistentType", true );
   }
   catch ( TypeLoadException^ ) 
   {
      
      // Serialize the exception to disk and reconstitute it back again.
      try
      {
         System::DateTime ErrorDatetime = DateTime::Now;
         Console::WriteLine( "A TypeLoadException has been raised." );
         
         // Create MyTypeLoadException instance with current time.
         MyTypeLoadExceptionChild^ myTypeLoadExceptionChild = gcnew MyTypeLoadExceptionChild( ErrorDatetime );
         IFormatter^ myFormatter = gcnew SoapFormatter;
         Stream^ myFileStream = gcnew FileStream( "typeload.xml",FileMode::Create,FileAccess::Write,FileShare::None );
         Console::WriteLine( "Serializing the TypeLoadException with DateTime as {0}", ErrorDatetime );
         
         // Serialize the MyTypeLoadException instance to a file.
         myFormatter->Serialize( myFileStream, myTypeLoadExceptionChild );
         myFileStream->Close();
         Console::WriteLine( "Deserializing the Exception." );
         myFileStream = gcnew FileStream( "typeload.xml",FileMode::Open,FileAccess::Read,FileShare::None );
         
         // Deserialize and reconstitute the instance from file.
         myTypeLoadExceptionChild = safe_cast<MyTypeLoadExceptionChild^>(myFormatter->Deserialize( myFileStream ));
         myFileStream->Close();
         Console::WriteLine( "Deserialized exception has ErrorDateTime = {0}", myTypeLoadExceptionChild->ErrorDateTime );
      }
      catch ( Exception^ e ) 
      {
         Console::WriteLine( "Exception : {0}", e->Message );
      }

   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( "Exception : {0}", e->Message );
   }

}

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

class GetObjectDataDemo
{
   public static void Main()
   {
      // Get a reference to the assembly mscorlib.dll, which is always
      // loaded. (System.String is defined in mscorlib.)
      Assembly mscorlib = typeof(string).Assembly;

      try
      {
         Console.WriteLine ("Attempting to load a type not present in the assembly 'mscorlib'");
         // This loading of invalid type raises a TypeLoadException
         Type myType = mscorlib.GetType("System.NonExistentType", true);
      }
      catch (TypeLoadException)
      {
         // Serialize the exception to disk and reconstitute it.
         System.DateTime ErrorDatetime = DateTime.Now;
         Console.WriteLine("A TypeLoadException has been raised.");

         // Create MyTypeLoadException instance with current time.
         MyTypeLoadException myException = new MyTypeLoadException(ErrorDatetime);
         IFormatter myFormatter = new SoapFormatter();
         Stream myFileStream = new FileStream("typeload.xml", FileMode.Create, FileAccess.Write, FileShare.None);
         Console.WriteLine("Serializing the TypeLoadException with DateTime as " + ErrorDatetime);

         // Serialize the MyTypeLoadException instance to a file.
         myFormatter.Serialize(myFileStream, myException);
         myFileStream.Close();

         Console.WriteLine("Deserializing the Exception.");
         myFileStream = new FileStream("typeload.xml", FileMode.Open, FileAccess.Read, FileShare.None);

         // Deserialize and reconstitute the instance from file.
         myException = (MyTypeLoadException) myFormatter.Deserialize(myFileStream);
         myFileStream.Close();
         Console.WriteLine("Deserialized exception has ErrorDateTime = " + myException.ErrorDateTime);
      }
   }
}

// This class overrides the GetObjectData method and initializes
// its data with current time.

[Serializable]
public class MyTypeLoadException : TypeLoadException
{
   private System.DateTime _errorDateTime = DateTime.Now;
   public DateTime ErrorDateTime { get { return _errorDateTime; }}

   public MyTypeLoadException(DateTime myDateTime)
   {
      _errorDateTime = myDateTime;
   }

   protected MyTypeLoadException(SerializationInfo sInfo, StreamingContext sContext)
       : base(sInfo, sContext)
   {
      // Reconstitute the deserialized information into the instance.
      _errorDateTime = sInfo.GetDateTime("ErrorDate");
   }

   public override void GetObjectData(SerializationInfo sInfo, StreamingContext sContext)
   {
      base.GetObjectData(sInfo, sContext);
      // Add a value to the Serialization information.
      sInfo.AddValue("ErrorDate", ErrorDateTime);
   }
}

Imports System.Reflection
Imports System.Runtime.Serialization
Imports System.Runtime.Serialization.Formatters.Soap
Imports System.Security.Permissions
Imports System.IO

Class GetObjectDataDemo

   Public Shared Sub Main()
      ' Get a reference to the assembly mscorlib.dll, which is always
      ' loaded. (System.String is defined in mscorlib.)
      Dim tString As Type = GetType(String)
      Dim mscorlib As [Assembly] = tString.Assembly

      Try
         Console.WriteLine("Attempting to load a type not present in the assembly 'mscorlib'")
         ' This loading of invalid type raises a TypeLoadException
         Dim myType As Type = mscorlib.GetType("System.NonExistentType", True)
      Catch
         ' Serialize the exception to disk and reconstitute it.
         Dim ErrorDatetime as System.DateTime = DateTime.Now
         Console.WriteLine("A TypeLoadException has been raised.")

         ' Create MyTypeLoadException instance with current time.
         Dim myException As new MyTypeLoadException(ErrorDatetime)
         Dim myFormatter as IFormatter  = new SoapFormatter()
         Dim myFileStream as Stream 
         myFileStream = New FileStream("typeload.xml", FileMode.Create, FileAccess.Write, FileShare.None)
         Console.WriteLine("Serializing the TypeLoadException with DateTime as " _
             & ErrorDatetime.ToString())

         ' Serialize the MyTypeLoadException instance to a file.
         myFormatter.Serialize(myFileStream, myException)
         myFileStream.Close()

         Console.WriteLine("Deserializing the Exception.")
         myFileStream = New FileStream("typeload.xml", FileMode.Open, FileAccess.Read, FileShare.None)

         ' Deserialize and reconstitute the instance from file.
         myException = CType(myFormatter.Deserialize(myFileStream), MyTypeLoadException)
         myFileStream.Close()
         Console.WriteLine("Deserialized exception has ErrorDateTime = " + myException.ErrorDateTime.ToString())
      End Try
   End Sub
End Class

' This class overrides the GetObjectData method and initializes
' its data with current time. 
<Serializable()> _
Public Class MyTypeLoadException
   Inherits TypeLoadException

   Private _errorDateTime As System.DateTime = DateTime.Now
   Public ReadOnly Property ErrorDateTime As DateTime
      Get
         Return _errorDateTime
      End Get
   End Property

   Public Sub New(myDateTime As DateTime)
      _errorDateTime = myDateTime
   End Sub

   Protected Sub New(sInfo As SerializationInfo, sContext As StreamingContext)
      MyBase.New(sInfo, sContext)
      ' Reconstitute the deserialized information into the instance.
      _errorDateTime = sInfo.GetDateTime("ErrorDate")
   End Sub

   ' GetObjectData overrides must always have a demand for SerializationFormatter.
   <SecurityPermissionAttribute(SecurityAction.Demand, SerializationFormatter:=true)> _
   Public Overrides Sub GetObjectData(sInfo As SerializationInfo, sContext As StreamingContext)
      MyBase.GetObjectData(sInfo, sContext)
      ' Add a value to the Serialization information.
      sInfo.AddValue("ErrorDate", ErrorDateTime)
   End Sub

End Class

Keterangan

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

Untuk informasi selengkapnya, lihat Serialisasi XML dan SOAP.

Lihat juga

• SerializationInfo
• Serialisasi XML dan SOAP