private void LoadAllCompany()
        {
            try
            {
                List<Company> companyList = new Company().GetAllCompany();
                if (companyList.Count > 1) companyList.Insert(0, new Company());

                ddlCompany.DataValueField = "CompanyId";
                ddlCompany.DataTextField = "CompanyName";

                ddlCompany.DataSource = companyList;
                ddlCompany.DataBind();

                ddlCompany.SelectedIndex = 0;
            }
            catch (Exception ex)
            {
                Alert.Show(ex.Message);
            }
        }