protected void itemDropDownList_SelectedIndexChanged(object sender, EventArgs e)
{
string item = itemDropDownList.SelectedItem.Text;
int companyId = Convert.ToInt32(companyDropDownList.SelectedValue);
availableLabel.Text = stockInManager.GetAvailable(item, companyId).ToString();
reorderLabel.Text = stockInManager.GetReorderLevel(item, companyId).ToString();
}