1  #region MD5函数

 2         /// <summary>

 3         /// MD5函数

 4         /// </summary>

 5         /// <param name="str">原始字符串</param>

 6         /// <returns>MD5结果</returns>

 7         public static string MD5(string str)

 8         {

 9             byte[] b = encoding.GetBytes(str);

10             b = new System.Security.Cryptography.MD5CryptoServiceProvider().ComputeHash(b);

11             string ret = "";

12             for (int i = 0; i < b.Length; i++)

13             {

14                 ret += b[i].ToString("x").PadLeft(2, '0');

15             }

16             return ret;

17         }

18 #endregion