c# string to hex , hex to byte conversion

C# string to hex , hex to byte conversion

In C#, you can convert a string to hexadecimal representation and vice versa using the BitConverter and Encoding classes. Here's an example of how you can convert a string to hex and then hex back to bytes:

using System; using System.Text; class Program { static void Main() { string originalString = "Hello, World!"; // Convert string to hexadecimal representation string hexString = StringToHex(originalString); Console.WriteLine($"Original String: {originalString}"); Console.WriteLine($"Hexadecimal Representation: {hexString}"); // Convert hex back to bytes and then to a string string convertedString = HexToString(hexString); Console.WriteLine($"Converted String: {convertedString}"); } static string StringToHex(string input) { byte[] bytes = Encoding.UTF8.GetBytes(input); string hexString = BitConverter.ToString(bytes).Replace("-", ""); return hexString; } static string HexToString(string hexString) { int length = hexString.Length; byte[] bytes = new byte[length / 2]; for (int i = 0; i < length; i += 2) { bytes[i / 2] = Convert.ToByte(hexString.Substring(i, 2), 16); } string convertedString = Encoding.UTF8.GetString(bytes); return convertedString; } }

This example uses UTF-8 encoding, but you can replace it with other encodings if needed. The StringToHex function converts a string to its hexadecimal representation, and the HexToString function converts a hex string back to a string. The BitConverter class is used to convert bytes to a hexadecimal string and vice versa. The Replace("-", "") is used to remove any hyphens that may be included in the hexadecimal representation.

Examples

  1. "C# convert string to hex"

    • Code:
      string inputString = "Hello"; byte[] byteArray = Encoding.UTF8.GetBytes(inputString); string hexString = BitConverter.ToString(byteArray).Replace("-", "");
    • Description: This code converts a string ("Hello") to its hexadecimal representation using UTF-8 encoding and BitConverter.

  2. "C# convert hex string to byte array"

    • Code:
      string hexString = "48656C6C6F"; // Hex representation of "Hello" byte[] byteArray = Enumerable.Range(0, hexString.Length / 2) .Select(x => Convert.ToByte(hexString.Substring(x * 2, 2), 16)) .ToArray();
    • Description: This code converts a hexadecimal string ("48656C6C6F") to a byte array using LINQ and Convert.ToByte.

  3. "C# convert byte array to hex string with formatting"

    • Code:
      byte[] byteArray = { 72, 101, 108, 108, 111 }; // Bytes for "Hello" string hexString = BitConverter.ToString(byteArray).Replace("-", " ");
    • Description: This code converts a byte array to a formatted hex string with spaces between each byte ("48 65 6C 6C 6F").

  4. "C# convert hex string to ASCII string"

    • Code:
      string hexString = "48656C6C6F"; // Hex representation of "Hello" string asciiString = Encoding.ASCII.GetString(Enumerable.Range(0, hexString.Length / 2) .Select(x => Convert.ToByte(hexString.Substring(x * 2, 2), 16)) .ToArray());
    • Description: This code converts a hexadecimal string ("48656C6C6F") to an ASCII string using Encoding.ASCII.GetString.

  5. "C# convert string to hex and back"

    • Code:
      string originalString = "Hello"; byte[] byteArray = Encoding.UTF8.GetBytes(originalString); string hexString = BitConverter.ToString(byteArray).Replace("-", ""); byte[] convertedArray = Enumerable.Range(0, hexString.Length / 2) .Select(x => Convert.ToByte(hexString.Substring(x * 2, 2), 16)) .ToArray(); string convertedString = Encoding.UTF8.GetString(convertedArray);
    • Description: This code demonstrates converting a string to hex and back to a string using UTF-8 encoding.

  6. "C# convert hex string to byte array with error handling"

    • Code:
      string hexString = "48656C6C6F"; // Hex representation of "Hello" byte[] byteArray; try { byteArray = Enumerable.Range(0, hexString.Length / 2) .Select(x => Convert.ToByte(hexString.Substring(x * 2, 2), 16)) .ToArray(); } catch (Exception ex) { Console.WriteLine($"Error: {ex.Message}"); byteArray = null; }
    • Description: This code adds error handling to gracefully handle invalid hex strings during conversion to a byte array.

  7. "C# convert byte array to hex string without BitConverter"

    • Code:
      byte[] byteArray = { 72, 101, 108, 108, 111 }; // Bytes for "Hello" string hexString = string.Concat(byteArray.Select(b => b.ToString("X2")));
    • Description: This code converts a byte array to a hex string without using BitConverter, using a combination of LINQ and string formatting.

  8. "C# convert hex string to byte array using Regex"

    • Code:
      string hexString = "48656C6C6F"; // Hex representation of "Hello" byte[] byteArray = Regex.Split(hexString, "(?<=\\G..)") .Select(x => Convert.ToByte(x, 16)) .ToArray();
    • Description: This code uses a regular expression with Regex.Split to convert a hex string to a byte array.

  9. "C# convert ASCII string to hex string"

    • Code:
      string asciiString = "Hello"; string hexString = string.Concat(asciiString.Select(c => ((int)c).ToString("X2")));
    • Description: This code converts an ASCII string ("Hello") to a hex string, representing each character's ASCII value.

  10. "C# convert hex string to binary"

    • Code:
      string hexString = "48656C6C6F"; // Hex representation of "Hello" string binaryString = string.Join(string.Empty, hexString.Select(c => Convert.ToString(Convert.ToInt32(c.ToString(), 16), 2).PadLeft(4, '0')));
    • Description: This code converts a hex string to a binary string, representing each hex digit as a 4-bit binary value.

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