HttpParseException.GetObjectData Method
Assembly: System.Web (in system.web.dll)
public: virtual void GetObjectData ( SerializationInfo^ info, StreamingContext context ) override
public void GetObjectData ( SerializationInfo info, StreamingContext context )
public override function GetObjectData ( info : SerializationInfo, context : StreamingContext )
Parameters
- info
The SerializationInfo that holds the serialized object data about the exception being thrown.
- context
The StreamingContext that contains contextual information about the source or destination.
The following code example shows how to define a derived serializable Exception class that implements the GetObjectData method, which makes minor changes to two properties, and then calls the base class to perform the serialization. The example forces a divide-by-0 error, and then creates an instance of the derived Exception. The code serializes the instance to a file, deserializes the file into a new Exception, which it throws, and then catches and displays the exception's data.
// Example for the Exception( SerializationInfo, StreamingContext ) // constructor and the Exception.GetObjectData( SerializationInfo, // StreamingContext ) method. #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->ToUpper(); 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() */
Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.