C# program to check if a string contains any special character

To check if a string contains any special character, you need to use the following method −

Char.IsLetterOrDigit

Use it inside for loop and check or the string that has special characters.

Let us say our string is −

string str = "Amit$#%";

Now convert the string into character array −

str.ToCharArray();

With that, use a for loop and to check for each character using the isLetterOrDigit() method.

Example

Let us see the complete code.

Live Demo

using System;
namespace Demo {
   class myApplication {
      static void Main(string[] args) {
         string str = "Amit$#%";
         char[] one = str.ToCharArray();
         char[] two = new char[one.Length];
         int c = 0;
         for (int i = 0; i < one.Length; i++) {
            if (!Char.IsLetterOrDigit(one[i])) {
               two[c] = one[i];
               c++;
            }
         }
         Array.Resize(ref two, c);
         Console.WriteLine("Following are the special characters:");
         foreach(var items in two) {
            Console.WriteLine(items);
         }
         Console.ReadLine();
      }
   }
}

Output

Following are the special characters:
$
#
%

Samual Sam

Published on 24-Jul-2018 12:46:13

• Related Questions & Answers
• Program to check if a string contains any special character in C
• Java program to check if a string contains any special character
• Program to check if a string contains any special character in Python
• Python program to check if a string contains any unique character
• PHP program to check if a string has a special character
• Check if string contains special characters in Swift
• Java Program to check if the String contains any character in the given set of characters
• C# Program to replace a special character from a String
• Check if a string contains a sub-string in C++
• C# Program to check if a character is a whitespace character
• Python program to check if a string contains all unique characters
• How to check if a string contains only one type of character in R?
• How to check if a string contains a specific sub string?
• How to check if a string contains a certain word in C#?
• Check if a string contains numbers in MySQL?