String EndsWith(alphabet); C#

Question

I Have a string
string name="ajsbbc<<(either hold an alphabet or some symbol at the end )
Now i want a condition that identify a string contain [a-zA-Z] at the end(true/false)

score 4 · Answer 1 · answered Dec 15 '11 at 04:54

4

Here is a Regex solution:

Regex.IsMatch(name, "[a-zA-Z]$");

answered Dec 15 '11 at 04:54

Phil Klein

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But how this ragex will able to check last char only – RollerCosta Dec 15 '11 at 05:01
$ marks the end of the string so if there exists a match for `[a-zA-Z]` then the string being tested must end with a character in the set of `[a-zA-Z]`. – Phil Klein Dec 15 '11 at 05:07

score 3 · Accepted Answer · answered Dec 15 '11 at 05:01

3

There is a function in the Char class that does this already.

    string name = "ajsbbc";

    if (Char.IsLetter(name[name.Length - 1]))
        Console.WriteLine("True");
    else
        Console.WriteLine("False");

answered Dec 15 '11 at 05:01

colton7909

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This matches more than A-Za-z this will write true for Café `"Caf\u00e9" // U+00E9 LATIN SMALL LETTER E WITH ACUTE` but then again will write false for when a grapheme is used in Café `"Cafe\u0301" // U+0301 COMBINING ACUTE ACCENT` see http://stackoverflow.com/questions/2056866/enumerating-a-string-by-grapheme-instead-of-character for a solution that can deal with a grapheme – Conrad Frix Dec 15 '11 at 05:55

score 1 · Answer 3 · answered Dec 15 '11 at 04:52

1

store last char of your string at temp string and then check your temp string with regular exp
Regex lettersOnly = new Regex("^[a-zA-Z]$");
where

^ means "begin matching at start of string"
[a-zA-Z] means "match lower case and upper case letters a-z"
$ means "only match if cursor is at end of string"
tri it (i am not sure if it work)

answered Dec 15 '11 at 04:52

RollerCosta

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Remove the ^ and there's no need to pre-parse the string to get just the last char. – Cj S. Dec 15 '11 at 05:00

score 0 · Answer 4 · answered Dec 15 '11 at 04:50

0

You can use this function and send your string as parameter to this

    private bool IsAlphabet(string input)
    {
        bool alphabet = false;

        char ch = input[input.Length - 1];

        if ((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z'))
            alphabet = true;

        return alphabet;
    }

answered Dec 15 '11 at 04:50

Ajit Vaze

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Ajit will you please explain me the condition you mentioned above , just for my sake and not to test your knowlwdge(i mean is it possible to apply aloop in if condition over alphabets) – RollerCosta Dec 15 '11 at 04:57
Some suggestion. You need to check whether the string is null or empty. Also you just say return ((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z')); and avoid the local bool variable. you can also make this an extension method. – ferosekhanj Dec 15 '11 at 05:00

String EndsWith(alphabet); C#

4 Answers4