protected void btnSave_Click(object sender, EventArgs e) { CategoryBLL category_bll = new CategoryBLL(); string category_name = txtCategory.Text; int cat_id = category_bll.AddNewCategory(category_name); StockItemBLL stockBll = new StockItemBLL(); string item_Code = txtItemNo.Text; // int categoryID = Convert.ToInt32(txtCategory.Text); string description = txtDesc.Text; int reorder_Level = Convert.ToInt32(txtReorderLevel.Text); int reorder_Qty = Convert.ToInt32(txtReorderQty.Text); string unit = ddlUnit.SelectedItem.Text; int qty = Convert.ToInt32(txtQuantity.Text); string add_info = stockBll.AddNewStockItem(item_Code, cat_id, description, reorder_Level, reorder_Qty, unit, qty); lblmsg.Text = add_info; }