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How to cancel an action

Posted on 2001-06-14
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Last Modified: 2010-04-06
In the standard dbnavigator bar (Delphi 5) there is an event called 'BeforeAction'. How can I cancel or abort the action (any of them) from within this event?

Thanks !

AJ
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Question by:ajgonzalezm
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5 Comments
 
LVL 12

Expert Comment

by:rwilson032697
ID: 6193867
The quickest and easiest way is to call the 'Abort' procedure.

Cheers,

Raymond.
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LVL 44

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CrazyOne earned 50 total points
ID: 6193869
SysUtils.Abort;

Delphi Help
Ends the current process without reporting an error.

Unit

Sysutils

Category

flow control routines

procedure Abort;

Description

Use Abort to escape from an execution path without reporting an error.

Abort raises a special "silent exception" (EAbort), which operates like any other exception, but does not display an error message to the end user.  Abort redirects execution to the end of the last try .. finally block.
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LVL 1

Expert Comment

by:Greyman
ID: 6194027
Or, if you are logging your exceptions, you can be really fancy and do this:

raise EAbort.Create('Operation cancelled by user');

The user won't see that text, but the exception handling system will :)
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Author Comment

by:ajgonzalezm
ID: 6195409
CrazyOne: We were using abort alone and it didn't work that way. Using SysUtils.Abort solved the problem.

Thanks a lot. (to all of you)

Regards,


AJ
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LVL 44

Expert Comment

by:CrazyOne
ID: 6195459
Yeah I was getting compiling errors just using Abort and to this day I don't know why so I have gotten use to doing SysUtils.Abort instead. Glad we were able to help you.
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