dropdownlist二级菜单联动提示onchange不是dropdownlist的属性

Question

哪个高手能帮我解释一下,不圣感激

Answer 1

http://singlepine.cnblogs.com/articles/265678.htmlprivate void Page_Load(object sender, System.EventArgs e)
{
            if(!this.IsPostBack)
　　        {
                this.DropDownList1.Attributes.Add("onchange","XmlPost2(this);");
                this.DropDownList2.Attributes.Add("onchange","XmlPost3(this);");
　　        }
}