protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { try { if (Session["employee"] != null) { EmployeeBO ebo = (EmployeeBO)Session["employee"]; string empId = ebo.EmployeeId; string title = ebo.EmployeeTitle; CreateAdjustmentVoucherBL bl = new CreateAdjustmentVoucherBL(); //Category Control ddlCategory.DataSource = bl.getDistinctCategory(); ddlCategory.DataBind(); ddlCategory.Items.Insert(0, new ListItem("-Select-", "NA")); //ItemName Control ddlItemName.Enabled = false; ddlItemName.Width = 250; //Textbox Control tbUOM.Text = bl.getUOM(ddlCategory.SelectedValue); int defaultQuantity = 0; tbQuantity.Text = defaultQuantity.ToString(); //Supplier Control ddlSupplier.Enabled = false; ddlSupplier.Width = 200; btnSubmit.Visible = false; //Session for GridView al = new ArrayList(); // initialization for ArrayList Session["AdjustmentDetails"] = al; // Stores array into Session Object gvInventoryAdjustmentList.Columns[0].Visible = false; // Hide gridview column gvInventoryAdjustmentList.Columns[1].Visible = false; // Hide gridview column } } catch (Exception x) { System.Diagnostics.Debug.WriteLine(x); } } }