In Delphi, exception handling is implemented using try-except blocks. A try-except block allows you to enclose a section of code that may raise an exception, and specify a separate block of code (the except block) to handle the exception if it occurs.
Here is an example of how to use a try-except block in Delphi
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try //code that may raise an exception except on E: Exception do begin //exception handling code end; end; |
In this example, the code in the try block will be executed. If an exception is raised while the code is running, execution will jump to the except block, and the exception will be caught and handled. The on E Exception part specifies that the except block should handle all exceptions of type Exception or any of its subtypes.
You can also use a try-except block to handle specific exceptions by replacing the on E Exception part with on E EMyException (where EMyException is the type of exception you want to catch). You can also include multiple except blocks to handle different types of exceptions.
For example
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try //code that may raise an exception except on E: EMyException do begin //handling code for EMyException end; on E: EAnotherException do begin //handling code for EAnotherException end; end; |
You can also use a finally block in conjunction with a try-except block to execute code regardless of whether an exception was raised or not. The code in the finally block will always be executed after the try block and any except blocks have completed.
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try //code that may raise an exception except on E: Exception do begin //exception handling code end; finally //code that will always be executed end; |
For more information on exception handling in Delphi, you can refer to the Delphi documentation or online resources.
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