TypeLoadException.GetObjectData(SerializationInfo, StreamingContext) TypeLoadException.GetObjectData(SerializationInfo, StreamingContext) TypeLoadException.GetObjectData(SerializationInfo, StreamingContext) TypeLoadException.GetObjectData(SerializationInfo, StreamingContext) Method

Определение

Задает имя класса, имя метода, идентификатор ресурса и дополнительные сведения об исключении для объекта SerializationInfo.Sets the SerializationInfo object with the class name, method name, resource ID, and additional exception information.

public:
 override void GetObjectData(System::Runtime::Serialization::SerializationInfo ^ info, System::Runtime::Serialization::StreamingContext context);
[System.Security.SecurityCritical]
public override void GetObjectData (System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context);
override this.GetObjectData : System.Runtime.Serialization.SerializationInfo * System.Runtime.Serialization.StreamingContext -> unit
Public Overrides Sub GetObjectData (info As SerializationInfo, context As StreamingContext)

Параметры

info
SerializationInfo SerializationInfo SerializationInfo SerializationInfo

Объект, содержащий сериализованные данные объекта.The object that holds the serialized object data.

context
StreamingContext StreamingContext StreamingContext StreamingContext

Контекстные сведения об источнике или назначении.The contextual information about the source or destination.

Реализации

Исключения

Объект info имеет значение null.The info object is null.

Примеры

[Visual Basic, C#][Visual Basic, C#]

В следующем примере создается исключение и сериализует данные исключения в файл и затем восстанавливает исключение.The following example generates an exception, and serializes the exception data to a file, and then reconstitutes the exception. Для этого примера кода для запуска необходимо указать полное имя сборки.For this code example to run, you must provide the fully qualified assembly name. Сведения о том, как получить полное имя сборки, см. в разделе имена сборок.For information about how to obtain the fully qualified assembly name, see Assembly Names.

#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.Security.Permissions;
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");
   }

   // GetObjectData overrides must always have a demand for SerializationFormatter.
   [SecurityPermissionAttribute(SecurityAction.Demand, SerializationFormatter=true)]
   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
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 'Main
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 'New

   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 'New

   ' 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 'GetObjectData

End Class 'MyTypeLoadExceptionChild

Комментарии

Метод GetObjectData загружает в объект SerializationInfo все данные объекта исключения, предназначенные для сериализации.GetObjectData sets a SerializationInfo with all the exception object data targeted for serialization. Во время десериализации объект исключения воссоздается из SerializationInfo переданного в потоке.During deserialization, the exception object is reconstituted from the SerializationInfo transmitted over the stream.

Дополнительные сведения см. в разделе сериализация XML и SOAP.For more information, see XML and SOAP Serialization.

Безопасность

SecurityCriticalAttribute
Требует полного доверия для непосредственного вызывающего объекта.Requires full trust for the immediate caller. Этот член не может использоваться частично доверенным или прозрачным кодом.This member cannot be used by partially trusted or transparent code.

Применяется к

Дополнительно