Exception

[Properties (by Name)][Methods (by Name)][Events (by Name)]

Base class of all exceptions.

Declaration

Source position: sysutilh.inc line 107

Type
  Exception = class (TObject)
  private
    fmessage : string;
    fhelpcontext : LongInt;
  public
    constructor Create(const msg: string);
    constructor CreateFmt(const msg: string; const args: Array of const);
    constructor CreateRes(ResString: PString);
    constructor CreateResFmt(ResString: PString; const Args: Array of const);
    constructor CreateHelp(const Msg: string; AHelpContext: LongInt);
    constructor CreateFmtHelp(const Msg: string; 
                             const Args: Array of const; 
                             AHelpContext: LongInt);
    constructor CreateResHelp(ResString: PString; AHelpContext: LongInt);
    constructor CreateResFmtHelp(ResString: PString; 
                                const Args: Array of const; 
                                AHelpContext: LongInt);
    function ToString : string;  Override;
    HelpContext : LongInt;
    Message : string;
  end
  ;

Description

Exception is the base class for all exception handling routines in the RTL and FCL. While it is possible to raise an exception with any class descending from TObject, it is recommended to use Exception as the basis of exception class objects: the Exception class introduces properties to associate a message and a help context with the exception being raised. What is more, the SysUtils unit sets the necessary hooks to catch and display unhandled exceptions: in such cases, the message displayed to the end user, will be the message stored in the exception class.

Members

Member	Type	Visibility	Description
Create	Method	public	Constructs a new exception object with a given message.
CreateFmt	Method	public	Constructs a new exception object and formats a new message.
CreateFmtHelp	Method	public	Constructs a new exception object and sets the help context and formats the message
CreateHelp	Method	public	Constructs a new exception object and sets the help context.
CreateRes	Method	public	Constructs a new exception object and gets the message from a resource.
CreateResFmt	Method	public	Constructs a new exception object and formats the message from a resource.
CreateResFmtHelp	Method	public	Constructs a new exception object and sets the help context and formats the message from a resource
CreateResHelp	Method	public	Constructs a new exception object and sets the help context and gets the message from a resource
fhelpcontext	Field	private
fmessage	Field	private
HelpContext	Property	public	Help context associated with the exception.
Message	Property	public	Message associated with the exception.
ToString	Method	public	Nicely formatted version of the exception message

Inheritance

Class	Description
Exception	Base class of all exceptions.

See also

Name	Description
Abort	Abort program execution.
ExceptAddr	Current exception address.
ExceptionErrorMessage	Return a message describing the exception.
ExceptObject	Current Exception object.
LongInt	A signed 32-bits integer
LongInt	A signed 32-bits integer
ShowException	Show the current exception to the user.

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