Convert ascii to hex

Is there any code for converting ascii value to hex?
For example converting 65(ascii of "A") to 41(hex)

Not sure I understand what you'd like to do. It sounds like you want to take the string "A" and convert it to the string "41". Is that correct?

If so, then there are a couple of steps:
1. convert the string to an integer
2. convert the integer to a string in a different format

For Example:

Code:

---

static string StringToHexValues(string input)
{
    if (input == null)
        throw new ArgumentNullException("input");

    StringBuilder sb = new StringBuilder();
    foreach (char c in input)
    {
        // Step 1: Convert to numeric type
        // NOTE: If you know 'input' is an ASCII string, then
        // you can use a byte. However in C# you never can garuntee that...)
        int charVal = (int)c;

        // Step 2: Convert to string in hex format
        // NOTE: The "CultureInfo" isn't really necessary
        // in this case, but its always a good habit be explicit...
        string hexVal = charVal.ToString("X", CultureInfo.InvariantCulture);

        sb.Append(hexVal);
        sb.Append(" ");
    }

    return sb.ToString();
}

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To see how this works:

Code:

---

Console.WriteLine(StringToHexValues("Hello World!"));
Console.WriteLine(StringToHexValues("您好世界"));

---

Produces

Code:

---

48 65 6C 6C 6F 20 57 6F 72 6C 64 21
60A8 597D 4E16 754C

---

Hope this helps

((int)'A').ToString("X")