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DriverException Class

This is the generic driver exception. Drivers are permitted to directly throw this exception as well as any derived exceptions. Note that the Message property is a member of Exception, the base class of DriverException. The HResult property of Exception is simply renamed to Number.

This exception should only be thrown if there is no other more appropriate exception already defined, e.g. PropertyNotImplemented, InvalidOperationException, InvalidValueException, NotConnectedException etc. These specific exceptions should be thrown where appropriate rather than using the more generic DriverException. Conform will not accept DriverExceptions where more appropriate exceptions are already defined.

As good programming practice, the Message property should not be empty, so that users understand why the exception was thrown.

Inheritance Hierarchy

Namespace:  ASCOM
Assembly:  ASCOM.Exceptions (in ASCOM.Exceptions.dll) Version: (
public class DriverException : Exception

The DriverException type exposes the following members.

Public methodDriverException
Initializes a new instance of the DriverException class that will return the 'unspecified error' number: 0x800404FF. Sets the COM HResult to UnspecifiedError.
Public methodDriverException(String)
Initializes a new instance of the DriverException class with a human-readable descriptive message.
Public methodDriverException(String, Exception)
Initializes a new instance of the DriverException class from another caught exception and a human-readable descriptinve message.
Public methodDriverException(String, Int32)
Create a new ASCOM exception using the specified text message and error code.
Public methodDriverException(String, Int32, Exception)
Create a new ASCOM exception based on another exception plus additional descriptive text and error code. This member is required for a well-behaved exception class. For example, if a driver receives an exception (perhaps a COMException) from some other component yet it wants to report some meaningful error that resulted from the other error, it can package the original error in the InnerException member of the exception it generates.
Public propertyData (Inherited from Exception.)
Public propertyHelpLink (Inherited from Exception.)
Public propertyInnerException (Inherited from Exception.)
Public propertyMessage (Inherited from Exception.)
Public propertyNumber
The COM error code for this exception (hex 80040400 - 800404FF)
Public propertySource (Inherited from Exception.)
Public propertyStackTrace (Inherited from Exception.)
Public propertyTargetSite (Inherited from Exception.)
Public methodGetBaseException (Inherited from Exception.)
Public methodGetObjectData (Inherited from Exception.)
Public methodGetType (Inherited from Exception.)
Public methodToString (Inherited from Exception.)
See Also
Inheritance Hierarchy