如何实施密码重置链接

我目前有一个系统，如果用户忘记了密码，他们可以通过点击忘记密码链接重置密码 . 他们将被带到他们输入用户名/电子邮件的页面，然后会向用户发送一封电子邮件，我想知道如何在电子邮件中实现密码重置链接，以便用户点击链接后/她被带到一个页面，允许他们重置密码 .

这是我控制器中的代码

public ActionResult ForgotPassword()
        {
           //verify user id

            string UserId = Request.Params ["txtUserName"];
            string msg = "";
            if (UserId == null) 
            {
                msg = "You Have Entered An Invalid UserId - Try Again";
                ViewData["ForgotPassword"] = msg;
                return View("ForgotPassword");
            }

            SqlConnection lsql = null;
            lsql = DBFactory.GetInstance().getMyConnection();

            String sqlstring = "SELECT * from dbo.[USERS] where USERID = '" + UserId.ToString() + "'";
            SqlCommand myCommand = new SqlCommand(sqlstring, lsql);
            lsql.Open();
            Boolean validUser;         
            using (SqlDataReader myReader = myCommand.ExecuteReader())
            {

                validUser = false;
                while (myReader.Read())
                {
                    validUser = true;

                }
                myReader.Close();
            }
            myCommand.Dispose();  


            if (!validUser) 
                  {
                msg = "You Have Entered An Invalid UserId - Try Again";
                ViewData["ForgotPassword"] = msg;
                lsql.Close();
                return View("ForgotPassword");
            }

            //run store procedure


            using (lsql)
            {
                SqlCommand cmd = new SqlCommand("Stock_Check_Test.dbo.RESET_PASSWORD", lsql);
                cmd.CommandType = CommandType.StoredProcedure;

                SqlParameter paramUsername = new SqlParameter("@var1", UserId);

                cmd.Parameters.Add(paramUsername);


                SqlDataReader rdr = cmd.ExecuteReader();
                while (rdr.Read())
                {
                    if (Convert.ToInt32(rdr["RC"]) == 99)
                    {
                        msg = "Unable to update password at this time";
                        ViewData["ForgotPassword"] = msg;
                        lsql.Close();
                        return View("ForgotPassword");  

                    }
                }
            }


            msg = "new password sent";
            ViewData["ForgotPassword"] = msg;
            lsql.Close();
            return View("ForgotPassword");
        }

这是我当前的存储过程，它向用户发送电子邮件

ALTER PROCEDURE [dbo].[A_SEND_MAIL]
    @var1 varchar (200), -- userid
    @var2 varchar (200) -- email address
AS
BEGIN
declare @bodytext varchar(200);
set @bodytext = 'Password Reset for user: ' +@var1 + ' @' + cast (getDate() as varchar) + ' ' ;
EXEC msdb.dbo.sp_send_dbmail 
@profile_name='Test',
@recipients=@var2,
@subject='Password Reset',
@body=@bodytext
END 

GO