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Exception::HelpLink Property
Visual Studio 2010
Gets or sets a link to the help file associated with this exception.
Assembly: mscorlib (in mscorlib.dll)
Property Value
Type: System::StringThe Uniform Resource Name (URN) or Uniform Resource Locator (URL).
Implements
_Exception::HelpLinkThe following code example throws an Exception that sets the HelpLink property in its constructor and then catches the exception and displays HelpLink.
// Example for the Exception::HelpLink, Exception::Source, // Exception::StackTrace, and Exception::TargetSite properties. using namespace System; namespace NDP_UE_CPP { // Derive an exception; the constructor sets the HelpLink and // Source properties. public ref class LogTableOverflowException: public Exception { private: static String^ overflowMessage = "The log table has overflowed."; public: LogTableOverflowException( String^ auxMessage, Exception^ inner ) : Exception( String::Format( "{0} - {1}", overflowMessage, auxMessage ), inner ) { this->HelpLink = "http://msdn.microsoft.com"; this->Source = "Exception_Class_Samples"; } }; public ref class LogTable { public: LogTable( int numElements ) { logArea = gcnew array<String^>(numElements); elemInUse = 0; } protected: array<String^>^logArea; int elemInUse; public: // The AddRecord method throws a derived exception if // the array bounds exception is caught. int AddRecord( String^ newRecord ) { try { logArea[ elemInUse ] = newRecord; return elemInUse++; } catch ( Exception^ ex ) { throw gcnew LogTableOverflowException( String::Format( "Record \"{0}\" was not logged.", newRecord ),ex ); } } }; // Create a log table and force an overflow. void ForceOverflow() { LogTable^ log = gcnew LogTable( 4 ); try { for ( int count = 1; ; count++ ) { log->AddRecord( String::Format( "Log record number {0}", count ) ); } } catch ( Exception^ ex ) { Console::WriteLine( "\nMessage ---\n{0}", ex->Message ); Console::WriteLine( "\nHelpLink ---\n{0}", ex->HelpLink ); Console::WriteLine( "\nSource ---\n{0}", ex->Source ); Console::WriteLine( "\nStackTrace ---\n{0}", ex->StackTrace ); Console::WriteLine( "\nTargetSite ---\n{0}", ex->TargetSite->ToString() ); } } } int main() { Console::WriteLine( "This example of \n Exception::Message, \n" " Exception::HelpLink, \n Exception::Source, \n" " Exception::StackTrace, and \n Exception::" "TargetSite \ngenerates the following output." ); NDP_UE_CPP::ForceOverflow(); } /* This example of Exception::Message, Exception::HelpLink, Exception::Source, Exception::StackTrace, and Exception::TargetSite generates the following output. Message --- The log table has overflowed. - Record "Log record number 5" was not logged. HelpLink --- http://msdn.microsoft.com Source --- Exception_Class_Samples StackTrace --- at NDP_UE_CPP.LogTable.AddRecord(String newRecord) at NDP_UE_CPP.ForceOverflow() TargetSite --- Int32 AddRecord(System.String) */
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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