Non cap sensitive search C#

Question

Hi all,

I want to do a search of a list of strings, non cap sensitive.

Have tried .Contains and ==

Is there a method to do this, or would I have to convert the entire list of strings to noncaps, then search?

Cheers!

Answer 1

How about String.IndefOf with the StringComparison argument set? Alternatively, build a RegEx.

Answer 2

One way to do it.

var answer = list.FirstOrDefault(item => item.Equals("test", StringComparison.CurrentCultureIgnoreCase));

Answer 3

Assuming you use C# 3:

var all = new [] {"A", "a", "AB", "aB", "Ab". "Etc"};
var searchItem = "A";
var found = all.Where (x => string.Compare(x, searchItem, StringComparison.InvariantCultureIgnoreCase) == 0);

foreach(var foundItem in found)
  Console.WriteLine(foundItem);

Answer 4

You can simply use String.ToUpper() to compare as non sensitive. (Just uppercase both strings you're comparing).

Or there are more advanced string comparison helpers in the .net lib:

See: http://en.csharp-online.net/CSharp%5FFAQ%3A%5FHow%5Fperform%5Fa%5Fcase%5Finsensitive%5Fstring%5Fcomparison