CODEWITHSUNDEEP
c#stringcharcontains
Butters
Butters

Reputation: 1057

Check String of chars

I'm looking for an fast method-solutions of my Problem to check a String, if this contains an min one char. IF String contains like any one of character in alphabet then return true, else false.

public bool checkString(String s)
{
  return true || false;
}

For Example:

"1232133432454355467" return false 
"134324239846c" return true

Upvotes: 1

Views: 331

Answers (6)

Sudhakar Tillapudi
Sudhakar Tillapudi

Reputation: 26209

static void Main(string[] args)
        {
            Console.WriteLine(checkString("137563475634c756"));
        }
        static  public bool checkString(String s)
        {
            return Regex.IsMatch(s, "[a-zA-Z]");
        }

It Returns True.

Upvotes: 1

Alex Filipovici
Alex Filipovici

Reputation: 32541

Try:

using System;
using System.Text.RegularExpressions;

class Program
{
    static void Main()
    {
        var r = CheckString("112");
        Console.WriteLine(r); // false
        r = CheckString("112a");
        Console.WriteLine(r); // true
    }

    public static bool CheckString(String input)
    {
        return Regex.Match(input, @"[a-zA-Z]").Success;
        // or, as @Vlad L suggested
        //return Regex.IsMatch(input, @"[a-zA-Z]");
    }
}

If you want to verify against the "All Letters" Unicode character class, use this one instead:

return Regex.IsMatch(input, @"\p{L}");

Reference: Supported Unicode General Categories

Upvotes: 4

Nickon
Nickon

Reputation: 10146

What about this?

if (Regex.IsMatch(yourString, "[a-zA-Z]"))
{
}

Upvotes: 1

Kami
Kami

Reputation: 19407

Just for sake of completion.

// Regex to check the value consists of letters
// with atleast 1 character
private static Regex reg = new Regex(@"[a-zA-Z]+");

public bool checkString(String s)
{
    return reg.Match(s).Success;
}

Upvotes: 1

Kaf
Kaf

Reputation: 33809

Try this with ToCharArray():

public bool checkString(String s)
{
    bool retValue =  s.ToCharArray()
                      .Any(c => ((int)c > 64 && (int)c < 91) || 
                                ((int)c > 96 && (int)c < 123));
    return retValue
}

Upvotes: 1

svinja
svinja

Reputation: 5576

If I understood the question correctly... This returns true if the string contains at least one letter.

    public bool checkString(String s)
    {
        return s.Any(x => Char.IsLetter(x));
    }

Upvotes: 2

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