[ACCEPTED]-C# Catch bool exception when using return-try-catch

Accepted answer
Score: 20

How about using Boolean.TryParse instead?

bool result = false;
Boolean.TryParse( boolUpdate, out result );
return !result;


Score: 9

First, the general case: Just because you 5 return out of a block doesn't mean you can't 4 put it inside of a try/catch:

    if ( whatever )
        return true;

catch ( Exception E )
    HandleMyException( E );
    return false;

... this is 3 perfectly legal. Meanwhile, as other posters 2 have written, TryParse() is probably what you want 1 in this specific case.

Score: 6

The following will return true only when 1 the string is 'true' and not generate exceptions.

        bool value;
        return bool.TryParse(boolUpdate, out value) && value;
Score: 4

When boolUpdate does not contain TRUE or 10 FALSE, you should catch the exception offcourse, but 9 what would you like to do when such a situation 8 arises ? You do not wan't to ignore the 7 exception, don't you, since I feel that 6 you want to return from the method anyway 5 ?

Instead of using Boolean.Parse, you can use Boolean.TryParse, wich will 4 return false if the Parse operation failed 3 (the boolUpdate argument in your case doesn't 2 contain true or false, for instance).

Or, you 1 can do this:

   return Boolean.Parse (boolUpdate)
catch(FormatException ex )
   return false;

But, I would prefer to use TryParse:

bool result;
bool containsBool = Boolean.TryParse (boolUpdate, out result);
return containsBool && result;
Score: 0

You can try to use Boolean.TryParse...it 5 does not throw, will put the parsed value 4 in the out parameter if the parsing was 3 successful, otherwise it will have the default 2 value, also will return true if the parsing 1 was successful.

 string blah = "true";
 bool val;
 Boolean.TryParse( blah, out val);
 return val;

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