//on form load populate data into grid views private void frmPackage_Load(object sender, EventArgs e) { PackageDB productsObj = new PackageDB(); if (productsObj.FillDataGrid()) { pkgDataGrid.DataSource = productsObj.dt; } if (productsObj.fetchProducts()) { while (productsObj.reader.Read()) { cmbProducts.Items.Add(Convert.ToString(productsObj.reader.GetValue(0))); } productsObj.reader.Close(); } Load_PkgProducts(); Customize_GridView(); CustomizeProductGrid(); Clear_Form(); }