首先head标签上添加runat="server"。
protected void Page_Load(object sender, EventArgs e){HtmlGenericControl autoCompleteScript = new HtmlGenericControl("script");autoCompleteScript.Attributes.Add("type", "text/javascript");autoCompleteScript.Attributes.Add("src", "/js/autocomplete/jquery.autocomplete.js");Page.Header.Controls.Add(autoCompleteScript);HtmlLink autoCompleteCss = new HtmlLink();autoCompleteCss.Href = "/js/autocomplete/jquery.autocomplete.css";autoCompleteCss.Attributes.Add("rel", "stylesheet");autoCompleteCss.Attributes.Add("type", "text/css");Page.Header.Controls.Add(autoCompleteCss);}