checking for ANY NULL object before ToLower

Question

I have an object where a property may exist or may not exist.

if(response.AddressInformation.AddressResponses.Any(inf => inf.AddressResponse.matchCodeStatus.ToLower().Equals("usps_match")))
{

}

I have two array items of AddressResponse. First item has null for matchCodeStatus and thats where I get object not set to an instance exception. How can I achieve my target and escape this exception?

I tried to put a null check before my IF, but it didnt work

if(response.AddressInformation.AddressResponses.Any(inf => inf.AddressResponse.matchCodeStatus != null)

Your title explains how - check for `null` *before* you try to invoke instance methods like `ToLower()`. — Ňɏssa Pøngjǣrdenlarp, May 25 '19 at 23:54
Possible duplicate of [What is a NullReferenceException, and how do I fix it?](https://stackoverflow.com/questions/4660142/what-is-a-nullreferenceexception-and-how-do-i-fix-it) — Ňɏssa Pøngjǣrdenlarp, May 26 '19 at 00:00
What about `inf => inf.AddressResponse.matchCodeStatus != null && inf.AddressResponse.matchCodeStatus.ToLower().Equals("usps_match")`? — sticky bit, May 26 '19 at 00:05
@stickybit oh my bad for not placing the null check at the proper place. It works — Huma Ali, May 26 '19 at 00:28

score 0 · Answer 1 · answered May 26 '19 at 00:41

0

As of C# 6, you can also use a null conditional operator ?. :

inf => inf.AddressResponse.matchCodeStatus?.ToLower().Equals("usps_match"))

answered May 26 '19 at 00:41

Thinh

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checking for ANY NULL object before ToLower

1 Answers1