用户控件中动态加入脚本引用,添加前先判断是否已经有引用,没有才添加。
//××××.ascx
protected void Page_Load(object sender, EventArgs e) { StringBuilder sb = new StringBuilder(); StringWriter sw = new StringWriter(sb); HtmlTextWriter htw = new HtmlTextWriter(sw); this.Page.Header.RenderControl(htw); string headhtml = sb.ToString(); if (headhtml.IndexOf("jquery.js", StringComparison.CurrentCultureIgnoreCase) == -1) { string jquery = @"<script type=""text/javascript"" src=""/js/jquery.js""></script>"; this.Page.Header.Controls.Add(new LiteralControl(jquery)); } }
不能直接用 this.Page.Header.innerHtml = ""; 这种方式,否则会报错:"无法获取 的内部内容,因为该内容不是文本"