Sha1加密

1.         /// <summary>
           /// Sha1
           /// </summary>
           /// <param name="str"></param>
           /// <returns></returns>
           public static string Sha1(string str)
           {
               byte[] strres = Encoding.Default.GetBytes(str);
               HashAlgorithm isha = new SHA1CryptoServiceProvider();
               strres = isha.ComputeHash(strres);
               StringBuilder EnText = new StringBuilder();
               foreach (byte item in strres)
               {
                   EnText.AppendFormat("{0:x2}", item);
               }
   
               return EnText.ToString();
           }

           /// <summary>
           /// Sha1
           /// </summary>
           /// <param name="str"></param>
           /// <returns></returns>
           public static string Sha1(string str)
           {
               byte[] strres = Encoding.Default.GetBytes(str);
               HashAlgorithm isha = new SHA1CryptoServiceProvider();
               strres = isha.ComputeHash(strres);
               StringBuilder EnText = new StringBuilder();
               foreach (byte item in strres)
               {
                   EnText.AppendFormat("{0:x2}", item);
               }
   
               return EnText.ToString();
           }