namespace MyProject.Common

{

    public class MD5Helper

    {

        /// <summary>

        /// 对字符串进行MD5运算

        /// </summary>

        /// <param name="str"></param>

        /// <returns></returns>

        public static string GetMd5String(string str)

        {

            MD5 md5 = MD5.Create();

            byte[] buffer = Encoding.UTF8.GetBytes(str);

            byte[] md5Buffer = md5.ComputeHash(buffer);

            StringBuilder sb = new StringBuilder();

            foreach (byte b in md5Buffer)

            {

                sb.Append(b.ToString("x2"));

            }

            md5.Clear();

            return sb.ToString();

        }

    }

}