HttpParseException.GetObjectData Method
.NET Framework 3.0
When overridden in a derived class, sets the SerializationInfo object with information about the exception.
Namespace: System.Web
Assembly: System.Web (in system.web.dll)
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 )
Not applicable.
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() */
Community Additions
ADD
Show: