Check if string in upper case

Question

I want to check if my string contains all the upper case value or not for that I am using the below code but It does not work as expected for case 1 and only work for case2.

Case 1

string myString = "SWEET POTATO";
myString.All(char.IsUpper)

Case 2

string eval = "POTATO";  
eval.All(char.IsUpper)

It does not give me any error but I want in both the cases it will return true because in both the cases string value is in Upper case letter

Because your case1 includes `space` in between SWEET and POTATO — Prasad Telkikar, Jun 21 '19 at 06:03

score 0 · Answer 1 · answered Jun 21 '19 at 06:04

0

you could convert your String to Upcase and check eval:

string myString = "FOO BAR"
if (myString.ToUpper() == myString) {
    // your handling
}

answered Jun 21 '19 at 06:04

Jonas

198
1
14

While answering the question it is bad idea! Please don't create garbage just to check if string is all caps. – Alexei Levenkov Jun 21 '19 at 06:09
@AlexeiLevenkov, I appreciate your comment, but can you please elaborate what is garbage here. – Prasad Telkikar Jun 21 '19 at 06:38
@PrasadTelkikar string created as result of `myString.ToUpper()` becomes no longer referenced after that line and had to be garbage collected later... this may be ok for one-time operation on small string but quickly becomes a problem if this type of coding is used across big/long running system. – Alexei Levenkov Jun 21 '19 at 07:09

Check if string in upper case

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