C# hex to ascii

Question

I\'m trying to convert a String of hex to ASCII, using this:

public void ConvertHex(String hexString)
{
    StringBuilder sb = new StringBuilder();

    for          


        

Answer 1

There are four three problems here:

1. Since you're incrementing i by 2 on each iteration, you need to terminate at hexString.Length - 1. This doesn't actually matter; incrementing by two after the final iteration will bring the counter above the checked length regardless.
2. You're taking the wrong number of characters from hexString.
3. hs is never used.
4. You're not appending anything to sb.

Try this:

for (int i = 0; i < hexString.Length; i += 2)
{
    string hs = hexString.Substring(i, 2);
    sb.Append(Convert.ToChar(Convert.ToUInt32(hs, 16)));
}

Note that there's no need to qualify the types with their namespace, System (assuming you've referenced it at the top of the file with a using statement).