Can I solve this? (?:)

  • Thread starter Thread starter shapper
  • Start date Start date
S

shapper

Hello,

I have the following:

return returnUrl == null ? RedirectToAction("Index", "Home") : Redirect
(returnUrl);

I get an error:

Type of conditional expression cannot be determined because there is
no implicit conversion between 'System.Web.Mvc.RedirectToRouteResult'
and 'System.Web.Mvc.RedirectResult'

Is there a way to fix this without needing to use an IF?

Thanks,

Miguel
 
I have the following:

return returnUrl == null ? RedirectToAction("Index", "Home") :
Redirect (returnUrl);

I get an error:

Type of conditional expression cannot be determined because there is
no implicit conversion between 'System.Web.Mvc.RedirectToRouteResult'
and 'System.Web.Mvc.RedirectResult'

Is there a way to fix this without needing to use an IF?
Click to expand...

I'd use an 'if' statement here, for readability---if statements are
easier to quickly parse with your head when compared to (most) usages
of the ternary operator. IMHO, the ternary operator should only be
used with either a variable or a literal for the possible return
values, and function calls should be done in if statements.

It looks as if you're in need of parenthesis. Try:

return((returnUrl == null) ? RedirectToAction("Index", "Home") :
Redirect(returnUrl));

If you're still getting an error, then you probably need casts to
something that makes sense within the context of your code.

--- Mike
 
I'd use an 'if' statement here, for readability---if statements are
easier to quickly parse with your head when compared to (most) usages
of the ternary operator.  IMHO, the ternary operator should only be
used with either a variable or a literal for the possible return
values, and function calls should be done in if statements.

It looks as if you're in need of parenthesis.  Try:

return((returnUrl == null) ? RedirectToAction("Index", "Home") :
  Redirect(returnUrl));

If you're still getting an error, then you probably need casts to
something that makes sense within the context of your code.

        --- Mike
Click to expand...

Thanks!
 
shapper said:
Hello,

I have the following:

return returnUrl == null ? RedirectToAction("Index", "Home") : Redirect
(returnUrl);

I get an error:

Type of conditional expression cannot be determined because there is
no implicit conversion between 'System.Web.Mvc.RedirectToRouteResult'
and 'System.Web.Mvc.RedirectResult'

Is there a way to fix this without needing to use an IF?

Thanks,

Miguel
Click to expand...

Just cast one or both of the result operands to the data type of the
return value.
 
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