URL Encode all non alpha numeric in C#

Question

I need to fully URL Encode an email address.

HttpUtility.UrlEncode seems to ignore certain characters such as ! and .

I need to pass an email address in a ur

Answer 1

Use hex. There is a ConvertTo and a From and a sample test...

You can also just scape the characters that don't match A to Z by using a regex so your URL still looks pretty.

It will return a big list of numbers so you should be good

        public static string ConvertToHex(string asciiString)
    {
        var hex = "";
        foreach (var c in asciiString)
        {
            int tmp = c;
            hex += String.Format("{0:x2}", Convert.ToUInt32(tmp.ToString()));
        }
        return hex;
    }

    public static string ConvertToString(string hex)
    {
        var stringValue = "";
        // While there's still something to convert in the hex string
        while (hex.Length > 0)
        {
            stringValue += Convert.ToChar(Convert.ToUInt32(hex.Substring(0, 2), 16)).ToString();
            // Remove from the hex object the converted value
            hex = hex.Substring(2, hex.Length - 2);
        }

        return stringValue;
    }

    static void Main(string[] args)
    {
        string hex = ConvertToHex("don.joe@gmail.com");
        Console.WriteLine(hex);
        Console.ReadLine();
        string stringValue =
        ConvertToString(hex);
        Console.WriteLine(stringValue);
        Console.ReadLine();

    }