URL Encoding

URL-encodes string. This algorithm is convenient when encoding a string to be used in a query part of a URL, as a convenient way to pass variables to the next page.

• C#
• VB.Net
• C
• C++
• PHP

									public static string EncodeURL(string data)
{
	StringBuilder result = new StringBuilder(data.Length);

	foreach (char c in data)
	{
		if (('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || ('0' <= c && c <= '9'))
		{
			result.Append(c);
		}
		else
		{
			result.Append('%');
			result.Append(DecimalToHexadecimal(c).PadLeft(2, '0'));
		}
	}

	return result.ToString();
}

private static string DecimalToHexadecimal(int dec)
{
	if (dec < 1) return "0";

	int hex = dec;
	string hexStr = string.Empty;

	while (dec > 0)
	{
		hex = dec % 16;

		if (hex < 10)
			hexStr = hexStr.Insert(0, Convert.ToChar(hex + 48).ToString());
		else
			hexStr = hexStr.Insert(0, Convert.ToChar(hex + 55).ToString());

		dec /= 16;
	}

	return hexStr;
}
								

Example

									string data = "jdfgsdhfsdfsd 6445dsfsd7fg/*/+bfjsdgf%$^";
string value = EncodeURL(data);
								

Output

									jdfgsdhfsdfsd%206445dsfsd7fg%2F%2A%2F%2Bbfjsdgf%25%24%5E