Assign null to object.result if it throws exception

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I have got the following set of code

C#

Task<List<ExchangeRateDto>> getUsdExchangeRatesTask =
                    Task.Factory.StartNew(() => _accountsService.GetExchangeRates("USA", "USD"));
                
                JobDetailsModel model = GetJobDetailsModel(getUsdExchangeRatesTask.Result, job);

In the above, if the call to the _accountService fails due to some reason like service down or the endpoint does not match then the "

getUsdExchangeRatesTask.Result

" throws an exception.

I would prefer to handle in the way that the call to the service fails then

getUsdExchangeRatesTask.Result

should be assigned as Null so that the further call to other methods doesn't affect.

What I have tried:

I tried using try catch block but it just catches the exception but I would like to assign NUll to the value. Can someone please help me out to fix this issue.

Posted 25-Jan-19 0:13am

Member 14129661

Updated 25-Jan-19 1:40am

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MadMyche 25-Jan-19 6:38am

Can you show us the try....catch version?

Richard Deeming 25-Jan-19 6:53am

Why are you starting a new thread to call a synchronous method if you're then immediately blocking the current thread to wait for that method to complete? Just call the method directly.

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Richard MacCutchan · Answer 1 · 2019-01-25T01:41:00

Solution 1

In your catch block you need to check which exception has been thrown. You can then decide whether you can just set the result to null, or need to take some further action.

Posted 25-Jan-19 1:41am

Richard MacCutchan