/// <summary>

		/// 32位MD5加密(小写)
		/// </summary>
		/// <param name="input">输入字段</param>
		/// <returns></returns>
		public string Encrypt(string str)
		{
			MD5CryptoServiceProvider md5Hasher = new MD5CryptoServiceProvider();
			byte[] data = md5Hasher.ComputeHash(Encoding.Default.GetBytes(str));
			StringBuilder sBuilder = new StringBuilder();
			for (int i = 0; i < data.Length; i++)
			{
				sBuilder.Append(data[i].ToString("x2"));//转化为小写的16进制
			}
			return sBuilder.ToString();
		}