public DateTime assignifcolnameexists(string _colname, RdbDataType b = RdbDataType.DateTime)
        {
            DateTime rv;
            string retval = ddtt.Columns.Contains(_colname) ? ddtt.Rows[currentExcelPatient][_colname] + "" : "";

            if (retval.Length == 0)
            {
                autosettings.bHasDOB = false;
            }
            else autosettings.bHasDOB = true;

            rv = Convert.ToDateTime(retval);
            return rv;
        }
        public DateTime assignifcolnameexists(string _colname, RdbDataType b = RdbDataType.DateTime)
        {
            DateTime rv;
            string   retval = ddtt.Columns.Contains(_colname) ? ddtt.Rows[currentExcelPatient][_colname] + "" : "";

            if (retval.Length == 0)
            {
                autosettings.bHasDOB = false;
            }
            else
            {
                autosettings.bHasDOB = true;
            }

            rv = Convert.ToDateTime(retval);
            return(rv);
        }