1//读取背景颜色配置
 2protected void Page_Load(object sender, EventArgs e)
3{
4   if (!Page.IsPostBack)
5   {
6       this.DropDownList1.SelectedValue = System.Configuration.ConfigurationSettings.AppSettings["Backgroundcolor"];
7       form1.Style.Add(HtmlTextWriterStyle.BackgroundColor, this.DropDownList1.SelectedValue);
8   }
9}
10//保存背景颜色配置
11protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
12{
13   System.Configuration.ConfigurationSettings.AppSettings["Backgroundcolor"] = this.DropDownList1.SelectedValue;
14   Response.Redirect(Request.Url.LocalPath);
15}
16