解密的MD5:asp.net|我第一次使用MD5encrpt一个字符串并保存在数据库中的二进制..检索binarynbsp;值使用解密MD5在ASP.Net吗？

 protected void Button2_Click(object sender, EventArgs e)

    {

        try

        {

            string str = "update AdminLogin set password=@password where userid=@userid";

            SqlCommand cmd = new SqlCommand(str, Db.GetConnection());

            cmd.Parameters.AddWithValue("@userid", TextBox2.Text);

 

            MD5CryptoServiceProvider md5Hasher = new MD5CryptoServiceProvider();

 

            byte[] hashedBytes = null;

            UTF8Encoding encoder = new UTF8Encoding();

 

            hashedBytes = md5Hasher.ComputeHash(encoder.GetBytes(TextBox3.Text));

         

            SqlParameter sqp = new SqlParameter("@password", System.Data.SqlDbType.Binary, 16);

            sqp.Value = hashedBytes;

            cmd.Parameters.Add(sqp);

 

            cmd.ExecuteNonQuery();

        }

        catch (Exception ex)

        {

            Response.Write(ex.ToString());

        }

 



    }