public List<OpenImportExport> GetAllOpenIE(List<ImportExport> listIE)
 {
     List<OpenImportExport> result = new List<OpenImportExport>();
     listIE = GetAllIE();
     foreach (var item in listIE)
     {
         OpenImportExport openIE = new OpenImportExport();
         CustomerDAL customerDAL = new CustomerDAL();
         openIE.CheckNo = item.CheckNo;
         openIE.Date = item.Date;
         openIE.Type = item.Type;
         openIE.ImEx = item.ImEx;
         openIE.CustomerName = customerDAL.GetCustomerbyID(item.CustomerID).CustomerName;
         result.Add(openIE);
     }
     return result;
 }
        public List<OpenImportExport> GetExport()
        {
            List<OpenImportExport> list = new List<OpenImportExport>();
            ImportExportDAL IEDAL = new ImportExportDAL();
            string cs = CocBook.Properties.Settings.Default.connectionString;
            SqlConnection con = new SqlConnection(cs);
            SqlCommand cmd = new SqlCommand("Select * from ImportExport where ImportExport = @E", con);
            cmd.Parameters.AddWithValue("E", "Xuất");
            con.Open();
            SqlDataReader sdr = cmd.ExecuteReader();

            while (sdr.Read())
            {
                OpenImportExport openIE = new OpenImportExport();
                CustomerDAL customerDAL = new CustomerDAL();
                openIE.CheckNo = (int)sdr["CheckNo"];
                openIE.Date = (DateTime)sdr["Date"];
                openIE.Type = (string)sdr["Type"];
                openIE.ImEx = (string)sdr["ImportExport"];
                int customerID = (int)sdr["CustomerID"];
                openIE.CustomerName = customerDAL.GetCustomerbyID(customerID).CustomerName;
                list.Add(openIE);
            }
            con.Close();
            return list;
        }