How to extract non-numeric text from a string

Question

For example, I have this string that could change anytime I only want the alphabetic text from it:

Ferrari 5 10 15000 -5 0.2

So from that I want "Ferrari".

Sometimes there won't be a space between "Ferrari" and the numbers.

Answer 1

string str = "Ferrari 5 10 15000 -5 0.2";
string text = Regex.Match(str, @"[a-zA-Z\s]+").Value.Trim();

By also matching whitespace and then trimming the result, It will match "Some Car" in "Some Car 5 10 ..." .

Answer 2

Using regex you can just match the initial letters like so

string text = "Ferrari 5 10 15000 -5 0.2";
string pat = @"([a-z]+)";

// Instantiate the regular expression object.
Regex r = new Regex(pat, RegexOptions.IgnoreCase);

// Match the regular expression pattern against a text string.
Match m = r.Match(text);

Answer 3

你可以用

String s = Regex.Match(str, @"[a-zA-Z]+").Value;

Answer 4

One option would be to convert to a char array and pull out the letters and then convert back to a string:

string text = "Ferrari 5 10 15000 -5 0.2";
string alphas = string.Join( "", text.ToCharArray().Where( char.IsLetter ) );

Answer 5

This is one of the times when Regular Expressions come in handy :

Regex wordMatcher = new Regex("[a-zA-Z]+");
foreach(Match m in wordMatcher.Matches("Ferrari 55 100000 24 hello"))
    MessageBox.Show(m.Value);

Essentially all The RegEx does is attempt to match groups of letters between az ignoring case.

Answer 6

If it will always end with [digits, -, ., and spaces], you can use .TrimEnd :

record.TrimEnd("0123456789 .-".ToCharArray());

... or if there's no spaces in the text you care about, you can read until the first space ...

var whatINeed = new string(record.TakeWhile(c => c != ' ').ToArray());

... or just take the first item when split on spaces ...

var whatINeed = record.Split().First();