//MD5加密 public string GenerateMD5 ( string str ) { MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider(); byte[] byteArray = Encoding.ASCII.GetBytes ( str ); byteArray = md5.ComputeHash ( byteArray ); string hashedValue = ""; foreach ( byte b in byteArray ) { hashedValue += b.ToString ( "x2" ); } return hashedValue; }