Get Byte Count for String - CSharp System

CSharp examples for System:Byte

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Description

Get Byte Count for String

Demo Code


using System;// w w w .j a v  a2  s . c o  m

public class Main{
        public static int GetByteCount(string hexString)
        {
            int numHexChars = 0;
            char c;
            // remove all none A-F, 0-9, characters
            for (int i = 0; i < hexString.Length; i++)
            {
                c = hexString[i];
                if (IsHexDigit(c))
                    numHexChars++;
            }

            // if odd number of characters, discard last character
            if (numHexChars % 2 != 0)
            {
                numHexChars--;
            }

            return numHexChars / 2; // 2 characters per byte
        }
        /// <summary>
        /// Returns true is c is a hexadecimal digit (A-F, a-f, 0-9)
        /// </summary>
        /// <param name="c">Character to test</param>
        /// <returns>true if hex digit, false if not</returns>
        public static bool IsHexDigit(Char c)
        {
            int numChar;
            int numA = Convert.ToInt32('A');
            int num1 = Convert.ToInt32('0');
            c = Char.ToUpper(c);
            numChar = Convert.ToInt32(c);
            if (numChar >= numA && numChar < (numA + 6))
                return true;

            if (numChar >= num1 && numChar < (num1 + 10))
                return true;

            return false;
        }
}

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