Count characters in string C#

Questions & Answers
1

Hi, how do I count characters in a string with C#?

2

string.Length;

3

Your millage may vary and this can be done a lot of ways and Length is the right choice, but here you go.

using System;

public class SillyStringQuestion
{
  private string sentence;

  public SillyStringQuestion(string theString)
  {
    this.sentence = theString;
  }

  public int CountCharsTheString()
  {
    int result = 0;

    if(!string.IsNullOrWhiteSpace(sentence))
    {
      charArray = sentence.ToCharArray();
      
      foreach(char character in charArray)
        result++;
    }
    else
    {
      throw new Exception("bummer no data and stuff");
    }

    return result;
  }
}
4

For those that are interested, this website has benchmarked at least a dozen different ways to count the number of times a character occurs in a string, using both single threaded and multithreaded techniques.

Basically, the winner is either the single or parallel for-loop implementations as follows where “ss” is the Search String, “ch” is the array of characters you’re looking for.:

for (int x = 0; x < ss.Length; x++)
{
    for (int y = 0; y < ch.Length; y++)
    {
        for (int a = 0; a < ss[x].Length; a++ )
        {
		if (ss[x][a] == ch[y])
		    //it's a match. Do what you need to.
        }
    }
}