public bool isuserlogin(string upassword)  //检测用户是否登入
        { 
            try
            {
                getConnection getCon = new getConnection();
                oledCon = getCon.OledCon();
                oledCon.Open();
                string strAdd = String.Format("select uloginstate from T_user where upassword='{0}'", upassword.Trim());
                oledcmd = new OleDbCommand(strAdd, oledCon);
                oleRed = oledcmd.ExecuteReader();

                return oleRed;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ee.Message.ToString());
                return oleRed;

            }
        }