https://www.cnblogs.com/wolf-sun/p/3664771.html
方式一：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace Wolfy.DropDownListDemo
{
public partial class Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
DropDownListProvince.DataSource = GetList();
DropDownListProvince.DataTextField = "Name";
DropDownListProvince.DataValueField = "ID";
DropDownListProvince.DataBind();
RepeaterList.DataSource = GetList();
RepeaterList.DataBind();