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        /// <summary>
        /// µÇ¼
        /// </summary>
        /// <param name="M"> </param>
        /// <returns> </returns>
        public static DataSet Login(string LoginName, string LoginPassword)
        {
            string sql = "SELECT * from Login WHERE LoginName=@LoginName AND LoginPassword=@LoginPassword";
            try
            {
                SqlParameter[] sqlParameter =
            {
                new SqlParameter("@LoginName",LoginName),
                new SqlParameter("@LoginPassword",LoginPassword)
            };
                DAL dal = new DAL();
                return DAL.ExecuteDataSet(sql, sqlParameter); //DALÊý¾Ý²Ù×÷Àà
            }
            catch (Exception E)
     


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