protected void companyDropDownList_OnSelectedIndexChanged(object sender, EventArgs e) { companyDropDownList.Items.Remove(companyDropDownList.Items.FindByText("Select Company")); ItemViewModel.CompanyId = Convert.ToInt32(companyDropDownList.SelectedValue); itemDropDownList.DataSource = StockOutManager.GetItemsByCompany(ItemViewModel.CompanyId); itemDropDownList.DataTextField = "Name"; itemDropDownList.DataValueField = "Id"; itemDropDownList.DataBind(); itemDropDownList.Items.Insert(0, new ListItem("Select Item", "")); reorderLevelTextBox.Text = String.Empty; availableQuantityTextBox.Text = String.Empty; stockOutQuantityTextBox.Text = String.Empty; }