Click or drag to resize

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
SystemObject
  SystemException
    ASCOMDriverException
      More...

Namespace:  ASCOM
Assembly:  ASCOM.Exceptions (in ASCOM.Exceptions.dll) Version: 3351c4f3fa64146a7efd5b51ed4591e32a0a5484
Syntax
Copy
[SerializableAttribute]
public class DriverException : Exception

The DriverException type exposes the following members.

Constructors
  NameDescription
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.
Top
Properties
  NameDescription
Public propertyNumber
The COM error code for this exception (hex 80040400 - 800404FF)
Top
See Also
Inheritance Hierarchy