private void PurchaseModule_Load(object sender, EventArgs e)
 {
     // TODO: This line of code loads data into the 'stockManagementSystemDataSet1.ProductsPurchase' table. You can move, or remove it, as needed.
     // this.productsPurchaseTableAdapter.Fill(this.stockManagementSystemDataSet1.ProductsPurchase);
     //_purchase.Category = comboBoxCategory.Text;
     comboBoxSupplier.DataSource = _purchaseManager.ComboBoxSupplierList();
     comboBoxCategory.DataSource = _purchaseManager.ComboBoxCategoryList();
     //comboBoxProducts.DataSource = _purchaseManager.ComboBoxProductList2(_product);
     dataGridViewPurchase.DataSource = _purchaseManager.ShowPurchases(_purchase);
     // textBoxAvailableQuantity.Text = 0.ToString();
     //textBoxPreviousUnitPrice.Text = 0.ToString();
     //textBoxPreviousMrp.Text = 0.ToString();
     // serialNo--;
     //textBoxCode.Text = serialNo.ToString();
     //textBoxDate.Text = aDateTime.ToString();
     // _product.Name = comboBoxProducts.Text;
 }