private void loadData()
        {
            try
            {
                ProductService service = new ProductService();
                IList<DocCheckProduct> docCheckProducts = new List<DocCheckProduct>();
                docCheckProducts = service.getDocCheckProductAll();

                DataTable table = new DataTable();

                if (docCheckProducts != null && docCheckProducts.Count != 0)
                {

                    table = GetTable(docCheckProducts);
                    DataSet ds = new DataSet();
                    ds.Tables.Add(table);

                    dataGrid1.DataSource = ds.Tables["DocCheckProduct"];
                    FormatDgvProduct();
                    label2.Visible = true;
                    label2.Text = "�ӹǹ���鹾� :" + docCheckProducts.Count + " ��¡��";
                }
                else
                {

                        IList<DocCheckProduct> docCheckProductsnull = new List<DocCheckProduct>();
                        table = GetTable(docCheckProductsnull);
                        label2.Visible = false;
                        label2.Text = "�ӹǹ���鹾� : 0 ��¡��";
                        DataSet ds = new DataSet();
                        ds.Tables.Add(table);

                        dataGrid1.DataSource = ds.Tables["DocCheckProduct"];
                        FormatDgvProduct();

                }

            }
            catch (Exception ex)
            {

            }
        }