how to call another method in a 'try' block in case an exception is thrown inside a transaction

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Posted on by ShawnDEV

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Hi All,

I would like to call a method in a 'try' block in case an exception is thrown inside a transaction.

my code can be simplified as follows:

while (enumerator.moveNext())
{
	try
	{
		ttsbegin;
		...
		purchLine.update()
		
		ttscommit;
	}
	catch
	{
        infoLogEnum = SysInfoLogEnumerator::newData(infolog.infologData());
        while(infoLogEnum.moveNext())
        {
            // currentException() returns you Exception enum and you can check if it is Exception::Error or Exception::Warning.
            switch (infoLogEnum.currentException())
            {
                case Exception::Warning:
                    info(strFmt("[Error] PO:%1 %2",purchLine.PurchId,infoLogEnum.currentMessage()));
                    break;
            }
        }
	}
}

I would like to include that call to another method within the tts begin- tts commit transaction block like below

while (enumerator.moveNext())
{
	try
	{
		ttsbegin;
		...
		purchLine.update()
		// here I would like to call another method before ttscommit 
		
		ttscommit;
	}
	catch
	{
        infoLogEnum = SysInfoLogEnumerator::newData(infolog.infologData());
        while(infoLogEnum.moveNext())
        {
            // currentException() returns you Exception enum and you can check if it is Exception::Error or Exception::Warning.
            switch (infoLogEnum.currentException())
            {
                case Exception::Warning:
                    info(strFmt("[Error] PO:%1 %2",purchLine.PurchId,infoLogEnum.currentMessage()));
                    break;
            }
        }
	}
}

I tried to add that call right after purchline.update(), but then the infolog message is not shown to the user for a line with an error in case multiple lines are selected for update.

Thank you.

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Answers (2)

AJJAIS on at

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Hi Shawn,

Can you please explain more what are you trying to achieve. If there is an exception then call will go to exception and there you can set more messages as per your requirement. Thank you.

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Martin Dráb 237,965 Most Valuable Professional on at

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If exception is thrown, not other code in the transaction will be executed. Neither your code not ttscommit (the transaction is aborted, not committed). Therefore your requirement doesn't make sense.

You can call your code either in 'catch' blocks or the 'finally' block, but not inside 'try'.

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nmaenpaa 101,162 Moderator on at

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As others have already told you, it's not possible. When an exception is thrown, the execution always jumps to the catch statement. However I'm sure there's a solution to your business requirement, whatever it might be.

Meanwhile it's good to study the exception handling of x++ since it's an elementary part of development: docs.microsoft.com/.../exception-handling-with-try-and-catch-keywords

Whenever you write solutions that create or update data, you must take into account the possible failures, how to handle them, how to inform the user, and what things must fail together.

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ShawnDEV 678 on at

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Hi,

I will make my question a bit clearer. "Where should I put a call to another method if I want to call that method only if the result of purchLine.update() is not caught in error in the above situation where I need a separate transaction for each line ?"

Thank you.

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nmaenpaa 101,162 Moderator on at

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Hi,

what do you mean "result of purchLine.update() is not caught in error"?

If you want to run code if purchLine.update() doesn't throw exception, put your code below purchLine.update().

If you want to run code if purchLine.update() throws exception, put that code in the catch block.

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ShawnDEV 678 on at

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Hi,

Yes, that's why I have tried to put the code below purchLine.update() which is still within a transaction.

Then, when testing with one line with an error which is caught in catch block where the infolog is shown to the user, it shows the infolog with an error. it works fine.

But, when testing with two lines where one line with an error and the other without an error at one go, the infolog error message for that line with an error is not shown to the user at all. I debugged it and the message is stacked in SysInfologEnumerator > data object well.

I have no clue what excludes this message when selecting more than 1 record.

Thank you.

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nmaenpaa 101,162 Moderator on at

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Ok, so is your question still about calling code, or showing something in infolog?

In other words: is your problem that

- some code is not called (like your original question indicates)

- your infolog enumerating logic in catch block doesn't work as you would expect

- something else?

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ergun sahin 8,826 Moderator on at

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Use "copy" method instead of infologData

community.dynamics.com/.../error-message-is-not-displaying-when-i-use-sysinfologenumerator-newdata-infolog-infologdata

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ShawnDEV 678 on at

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Hi,

It is similar to the following problem - showing in infolog:

- your infolog enumerating logic in catch block doesn't work as you would expect

Are there any ways of showing infolog in catch statement correctly?

I also see that duplicate messages are shown in the infolog each time I try updating.

Thank you.

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nmaenpaa 101,162 Moderator on at

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What if you remove your infolog logic from the catch statement? Does it then show the messages only one time?

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