How can I make the following case insensitive?
myString1.Contains("AbC")
3 Answers
You can create your own extension method to do this:
public static bool Contains(this string source, string toCheck, StringComparison comp)
{
return source != null && toCheck != null && source.IndexOf(toCheck, comp) >= 0;
}
And then call:
mystring.Contains(myStringToCheck, StringComparison.OrdinalIgnoreCase);
5 Comments
Moo-Juice
This is arguably the best answer by wrapping it in an extension method.
Soner Gönül
@Moo-Juice Yes because it is familiar :) stackoverflow.com/a/444818/447156
Programmer Paul
I would recommend calling the function something other than an exact match with something in the framework like your initials + Contains. I use this approach for a ton of things. My initials are PS so I have psContains, psStartsWith, psEndsWith, etc. The reason I think it should be different is so you can tell, just by reading the code, what it's going to do. Also, the if the signatures are compatible, the compiler might not like it. If they are compatible enough, compiling wouldn't help find you find out if your extensions are in play. Extensions are a real gem of Dotnet. If used correctly :)
pjdupreez
I wish I could give you more than one up-vote!
ashlar64
You should check to see if the string and the toCheck argument are null. If either is null then you should return false. Otherwise it is going to throw a exception.
You can use:
if (myString1.IndexOf("AbC", StringComparison.OrdinalIgnoreCase) >=0) {
//...
}
This works with any .NET version.
1 Comment
andreas
Two typos in your answer, otherwise good ;-) It should be (obviously)
StringComparison.OrdinalIgnoreCasebool b = list.Contains("Hello", StringComparer.CurrentCultureIgnoreCase);
[EDIT] extension code:
public static bool Contains(this string source, string cont
, StringComparison compare)
{
return source.IndexOf(cont, compare) >= 0;
}
This could work :)
4 Comments
Tobia Zambon
This method is not present in standard C#
iGanja
This is the reason for the question... Thanks @trippino
Kamil Budziewski
@trippino edited my answer with extension code
Thomas.Benz
This is good and simple answer.
LIKEoperator which could be used here.