Check weather string Contain numbers special Char etc

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C#3.0

C#

how can check weather a string Contain numbers special Char etc

Posted 16-Apr-12 4:54am

shoni k

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Mohammad A Rahman · Answer 1 · 2012-04-16T15:07:00

You might try below,

C#

class Program
{
    static void Main(string[] args)
    {
        string randomCharacters = "HelloWorld2090!!!@#$";
        var result = randomCharacters.Any(ch => Char.IsNumber(ch) || Char.IsPunctuation(ch) || Char.IsSymbol(ch));
        Console.WriteLine(result);
    }
}

Hope it helps :)

VJ Reddy · Answer 2 · 2012-04-16T05:25:00

The Solution 1 given by Richard MacCutchan is very good.
As an alternative if you want to check whether the string contains a particular category of characters say Punctuation or Numbers etc., then the System.Text.RegularExpressions.Regex class can be considered to test as shown below:

C#

string text = "Is this text, contains special chars?";
//The Regex pattern matches if atleast one character of the
//alternatives is found \p{P} Unicode punctuation category
//\p{N} Unicode numbers category
if(System.Text.RegularExpressions.Regex.IsMatch(text,@"\p{P}|\p{N}"))
    Console.WriteLine ("Contains special chars");
else
    Console.WriteLine ("Does not contain special chars");

//Output
//Contains special chars

Richard MacCutchan · Answer 3 · 2012-04-16T05:05:00

Solution 1

IndexOfAny()[^] looks like a good choice.

Posted 16-Apr-12 5:05am

Richard MacCutchan

Comments

VJ Reddy 16-Apr-12 11:21am

Good link. 5!

Sergey Alexandrovich Kryukov 16-Apr-12 22:29pm

Agree, a 5.
--SA

Check weather string Contain numbers special Char etc

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