C# Char IsControl(String, Int32)

Description

Char IsControl(String, Int32) indicates whether the character at the specified position in a specified string is categorized as a control character.

Syntax

Char.IsControl(String, Int32) has the following syntax.

public static bool IsControl(
  string s,
  int index
)

Parameters

Char.IsControl(String, Int32) has the following parameters.

• s - A string.
• index - The position of the character to evaluate in s.

Returns

Char.IsControl(String, Int32) method returns true if the character at position index in s is a control character; otherwise, false.

Example

The following example enumerates the characters in a string and determines whether any are control characters.

using System;/* w  w  w  .  jav  a2s  .co m*/

public class MainClass
{
   public static void Main()
   {
      string sentence = "This is " + Environment.NewLine + ".";
      for (int ctr = 0; ctr < sentence.Length; ctr++)
      {
         if (Char.IsControl(sentence, ctr))
           Console.WriteLine("Control character \\U{0} found in position {1}.", 
             Convert.ToInt32(sentence[ctr]).ToString("X4"), ctr);

      }
   }
}

The code above generates the following result.