Case insensitive string search using contains

Question

I need to search a directory for files and folders that contain the entered text,

I can see that File.Name.Contains(txtSearch) is the one that i need, but the problem is that it doesn't return true when characters cases (lower/upper) don't match.

Although File.Name.Equals(txtSearch,StringComparison.InvariantCultureIgnoreCase) solves this problem it requires that the the search string should be exactly the same.

Can you add some examples of 'problem' strings and what you want them to do. The given information is pretty basic. — CodingBarfield
– CodingBarfield, Commented Apr 17, 2012 at 10:35

Robin Maben · Accepted Answer · 2012-04-17 10:34:06Z

3

var position =  File.Name.IndexOf(txtSearch, StringComparison.InvariantCultureIgnoreCase)

Where position will be greater than -1 if your "file name" contains any occurrence of the specified search string.

So..

if(position > -1){
    //found files, do something
}

edited Apr 17, 2012 at 10:34

answered Apr 17, 2012 at 10:28

Robin Maben

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1 Comment

Murhaf Sousli Over a year ago

Worked Perfect, it even returns more items than windows explorer!

j0k · Accepted Answer · 2013-03-07 08:24:18Z

0

 var _reps = new List<string>(); // with variant data

_reps.ConvertAll<string>(new Converter<string,string>(delegate(string srt){srt= srt.ToLower(); return srt;})).Contains("invisible")

this is by far the cleanest way i could find to do it

edited Mar 7, 2013 at 8:24

j0k

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answered Mar 7, 2013 at 8:07

Uhlamurile

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