string str = "<div>aaa</div>"; this.Literal1.Text = string.Format("<pre>{0}</pre>", str.Replace("<", "<").Replace(">", ">"));
string str = "<div>中国</div>"; this.Literal1.Text = Server.HtmlEncode(str);
原文：http://www.cnblogs.com/yibinboy/p/3902707.html