首先你需要把它放到一个byte[] ，所以这样做：
byte[] ba = Encoding.Default.GetBytes("sample");
然后你可以得到string：
var hexString = BitConverter.ToString(ba);
现在，这将返回一个带有破折号( - )的string，所以你可以简单地使用这个：
hexString = hexString.Replace("-", "");
如果你想要摆脱那些。
注意：如果需要，可以使用不同的Encoding 。
var result = string.Join("", input.Select(c => ((int)c).ToString("X2")));
要么
var result =string.Join("", input.Select(c=> String.Format("{0:X2}", Convert.ToInt32(c))));
对于Unicode支持：
public class HexadecimalEncoding { public static string ToHexString(string str) { var sb = new StringBuilder(); var bytes = Encoding.Unicode.GetBytes(str); foreach (var t in bytes) { sb.Append(t.ToString("X2")); } return sb.ToString(); // returns: "48656C6C6F20776F726C64" for "Hello world" } public static string FromHexString(string hexString) { var bytes = new byte[hexString.Length / 2]; for (var i = 0; i < bytes.Length; i++) { bytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2), 16); } return Encoding.Unicode.GetString(bytes); // returns: "Hello world" for "48656C6C6F20776F726C64" } }
根据这个片段，这个方法应该适用于长string：
private string StringToHex(string hexstring) { StringBuilder sb = new StringBuilder(); foreach (char t in hexstring) { //Note: X for upper, x for lower case letters sb.Append(Convert.ToInt32(t).ToString("x")); } return sb.ToString(); }
用法：
string result = StringToHex("Hello world"); //returns "48656c6c6f20776f726c64"
另一种方法在一条线上
string input = "Hello world"; string result = String.Concat(input.Select(x => ((int)x).ToString("x")));
几个Unicode的替代品
var s = "0𝟏𝟚𝟥𝟰𝟻"; var s1 = s.Aggregate("", (h, c) => h + ((int)c).ToString("x4")); // left padded with 0 "0030d835dfcfd835dfdad835dfe5d835dff0d835dffb" var s2 = s.Aggregate("", (h, c) => h + string.Format("{0,4:x}", (int)c)); // left padded with space " 30d835dfcfd835dfdad835dfe5d835dff0d835dffb" var sL = BitConverter.ToString(Encoding.Unicode.GetBytes(s)).Replace("-", ""); // Little Endian "300035D8CFDF35D8DADF35D8E5DF35D8F0DF35D8FBDF" var sB = BitConverter.ToString(Encoding.BigEndianUnicode.GetBytes(s)).Replace("-", ""); // Big Endian "0030D835DFCFD835DFDAD835DFE5D835DFF0D835DFFB" // no encodding "300035D8CFDF35D8DADF35D8E5DF35D8F0DF35D8FBDF" byte[] b = new byte[s.Length * sizeof(char)]; Buffer.BlockCopy(s.ToCharArray(), 0, b, 0, b.Length); var sb = BitConverter.ToString(b).Replace("-", "");
)