if(!IsPostBack)
         {
            //ColorList 对应你的dplist控件
            ColorList.DataSource = CreateDataSource(); //绑定数据源
            ColorList.DataTextField = "ColorTextField"; //对应你的name
            ColorList.DataValueField = "ColorValueField"; //对应你的id

            ColorList.DataBind();
            ColorList.SelectedIndex = 0;

         }