共用方式為


HttpParseException.GetObjectData(SerializationInfo, StreamingContext) 方法

定義

在衍生類別中覆寫時,使用例外狀況的資訊設定 SerializationInfo 物件。

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

參數

info
SerializationInfo

SerializationInfo,包含所擲回之例外狀況的相關序列化物件資料。

context
StreamingContext

包含有關來源或目的端內容資訊的 StreamingContext

例外狀況

info 參數為 null

範例

下列程式碼範例示範如何定義可實作 方法的衍生可 Exception 序列化類別 GetObjectData ,該方法會對兩個屬性進行次要變更,然後呼叫基類來執行序列化。 此範例會強制除以 0 錯誤,然後建立衍生 Exception 的實例。 程式碼會將 實例序列化為檔案、將檔案還原序列化為新的 Exception ,它會擲回該檔案,然後攔截並顯示例外狀況的資料。

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

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

// Define a serializable derived exception class.

[Serializable]
ref class SecondLevelException: public Exception, public ISerializable
{
public:

   // This public constructor is used by class instantiators.
   SecondLevelException( String^ message, Exception^ inner )
      : Exception( message, inner )
   {
      HelpLink = "http://MSDN.Microsoft.com";
      Source = "Exception_Class_Samples";
   }


protected:

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


public:

   // GetObjectData performs a custom serialization.
   [System::Security::Permissions::SecurityPermissionAttribute
   (System::Security::Permissions::SecurityAction::LinkDemand, 
   Flags=System::Security::Permissions::SecurityPermissionFlag::SerializationFormatter)]
   virtual void GetObjectData( SerializationInfo^ info, StreamingContext context ) override
   {
      
      // Change the case of two properties, and then use the 
      // method of the base class.
      HelpLink = HelpLink->ToLower();
      Source = Source->ToUpperInvariant();
      Exception::GetObjectData( info, context );
   }

};

int 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 = gcnew 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 = gcnew FileStream( "NewException.dat",FileMode::Create );
         try
         {
            
            // Serialize the derived exception.
            SoapFormatter^ formatter = gcnew SoapFormatter( nullptr,StreamingContext(StreamingContextStates::File) );
            formatter->Serialize( stream, newExcept );
            
            // Rewind the stream and deserialize the 
            // exception.
            stream->Position = 0;
            SecondLevelException^ deserExcept = dynamic_cast<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 of the Exception constructor and Exception.GetObjectData
with SerializationInfo and StreamingContext parameters generates
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

SecondLevelException: Forced a division by 0 and threw another exception. ---> S
ystem.DivideByZeroException: Attempted to divide by zero.
   at main()
   --- End of inner exception stack trace ---
   at main()

*/
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()
*/
' If compiling with the Visual Basic compiler (vbc.exe) from the command
' prompt, be sure to add the following switch:
'    /reference:System.Runtime.Serialization.Formatters.Soap.dll 
Imports System.IO
Imports System.Runtime.Serialization
Imports System.Runtime.Serialization.Formatters.Soap
Imports System.Security.Permissions

 ' Define a serializable derived exception class.
 <Serializable()>  _
 Class SecondLevelException
     Inherits Exception

     ' This public constructor is used by class instantiators.
     Public Sub New( message As String, inner As Exception )
         MyBase.New( message, inner )

         HelpLink = "http://MSDN.Microsoft.com"
         Source = "Exception_Class_Samples"
     End Sub

     ' This protected constructor is used for deserialization.
     Protected Sub New( info As SerializationInfo, _
         context As StreamingContext )
             MyBase.New( info, context )
     End Sub

     ' GetObjectData performs a custom serialization.
     <SecurityPermissionAttribute(SecurityAction.Demand, _
                                  SerializationFormatter:=True)> _
     Overrides Sub GetObjectData( info As SerializationInfo, _
         context As StreamingContext)

         ' Change the case of two properties, and then use the
         ' method of the base class.
         HelpLink = HelpLink.ToLower()
         Source = Source.ToUpperInvariant()

         MyBase.GetObjectData(info, context)
     End Sub
 End Class

 Module SerializationDemo

     Sub Main()
         Console.WriteLine( _
             "This example of the Exception constructor " & _
             "and Exception.GetObjectData " & vbCrLf & _
             "with SerializationInfo and StreamingContext " & _
             "parameters generates " & vbCrLf & _
             "the following output." & vbCrLf )

         ' This code forces a division by 0 and catches the
         ' resulting exception.
         Try
             Try
                 Dim zero As Integer = 0
                 Dim ecks As Integer = 1 \ zero

             ' Create a new exception to throw again.
             Catch ex As Exception

                 Dim newExcept As New SecondLevelException( _
                     "Forced a division by 0 and threw " & _
                     "another exception.", ex )

                 Console.WriteLine( _
                     "Forced a division by 0, caught the " & _
                     "resulting exception, " & vbCrLf & _
                     "and created a derived exception:" & vbCrLf )
                 Console.WriteLine( "HelpLink: {0}", _
                     newExcept.HelpLink )
                 Console.WriteLine( "Source:   {0}", _
                     newExcept.Source )

                 ' This FileStream is used for the serialization.
                 Dim stream As New FileStream( _
                     "NewException.dat", FileMode.Create )

                 ' Serialize the derived exception.
                 Try
                     Dim formatter As New SoapFormatter( Nothing, _
                         New StreamingContext( _
                             StreamingContextStates.File ) )
                     formatter.Serialize( stream, newExcept )

                     ' Rewind the stream and deserialize the
                     ' exception.
                     stream.Position = 0
                     Dim deserExcept As SecondLevelException = _
                         CType( formatter.Deserialize( stream ), _
                             SecondLevelException )

                     Console.WriteLine( vbCrLf & _
                         "Serialized the exception, and then " & _
                         "deserialized the resulting stream " & _
                         "into a " & vbCrLf & "new exception. " & _
                         "The deserialization changed the case " & _
                         "of certain properties:" & vbCrLf )

                     ' Throw the deserialized exception again.
                     Throw deserExcept

                 Catch se As SerializationException
                     Console.WriteLine( "Failed to serialize: {0}", _
                         se.ToString( ) )

                 Finally
                     stream.Close( )
                 End Try
             End Try
         Catch ex As Exception
             Console.WriteLine( "HelpLink: {0}", ex.HelpLink )
             Console.WriteLine( "Source:   {0}", ex.Source )

             Console.WriteLine( )
             Console.WriteLine( ex.ToString( ) )
         End Try
     End Sub
 End Module
' 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_VB.SecondLevelException: Forced a division by 0 and threw another exce
' ption. ---> System.DivideByZeroException: Attempted to divide by zero.
'    at NDP_UE_VB.SerializationDemo.Main()
'    --- End of inner exception stack trace ---
'    at NDP_UE_VB.SerializationDemo.Main()

備註

方法會 GetObjectData 設定 SerializationInfo 物件,其中包含所有以序列化為目標的例外狀況物件資料。 還原序列化期間,例外狀況會透過資料流從傳輸的 SerializationInfo 重新組成。

適用於

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