private void gridView_CellDoubleClick(object sender, DataGridViewCellEventArgs e)
        {
            if (e.RowIndex != -1)//not header
            {
                if (isFormRegister)
                {
                    changeToFormAlter();
                }
                textbox_nv.ForeColor    = Color.Black;
                textbox_ncc.ForeColor   = Color.Black;
                textbox_ngay.ForeColor  = Color.Black;
                textbox_thang.ForeColor = Color.Black;
                textbox_nam.ForeColor   = Color.Black;
                label_id.Text           = this.gridView.CurrentRow.Cells[0].Value.ToString();
                string temp_query = "SELECT * FROM phieu_nhap WHERE id=" + this.gridView.CurrentRow.Cells[0].Value.ToString();
                cmd = new SqlCommand(temp_query);
                DataTable temp_dt = new DataTable();
                database.pushDataTable(cmd, temp_dt);

                textbox_nv.Text  = temp_dt.Rows[0]["nhan_vien_id"].ToString();
                textbox_ncc.Text = temp_dt.Rows[0]["ncc_id"].ToString();
                funcShare.getDate(this.gridView.CurrentRow.Cells[2].Value.ToString(), textbox_ngay, textbox_thang, textbox_nam);
                funcShare.loadGridView("chi_tiet_phieu_nhap", "mat_hang_id,so_luong,don_gia,don_vi",
                                       gridView2, funcShare.where ("phieu_nhap_id", label_id.Text));
            }
        }