下面是从Asp.net 后台添加CSS、JS、Meta标签的写法，我们这里写成函数方便以后使用。如果函数放在页面类中， Page参数也可以不要。

首先导入命名空间 using System.Web.UI.HtmlControls;

         ///   <summary>

         ///  添加JS脚本链接

         ///   </summary>

         ///   <param name="page"> 页面 </param>

         ///   <param name="url"> 路径 </param>  

         public   void  AddJS(System.Web.UI.Page page,  string  url)

        {

                HtmlGenericControl jsControl  =   new  HtmlGenericControl( " script " );

                jsControl.Attributes.Add( " type " ,  " text/javascript " );

                jsControl.Attributes.Add( " src " , url);

                page.Header.Controls.Add(jsControl);

        }

         ///   <summary>

         ///  添加JS脚本内容

         ///   </summary>

         ///   <param name="page"> 页面 </param>

         ///   <param name="content"> 脚本内容 </param>  

         public   void  AddScript(System.Web.UI.Page page,  string  content)

        {

                HtmlGenericControl scriptControl  =   new  HtmlGenericControl( " script " );

                scriptControl.Attributes.Add( " type " ,  " text/javascript " );

                scriptControl.InnerHtml  =  content;

                page.Header.Controls.Add(scriptControl);

        }

         ///   <summary>

         ///  添加CSS样式链接

         ///   </summary>

         ///   <param name="page"> 页面 </param>

         ///   <param name="url"> 路径 </param>  

         public   void  AddCss(System.Web.UI.Page page,  string  url)

        {

                HtmlLink link  =   new  HtmlLink();

                link.Href  =  url;

                link.Attributes.Add( " rel " ,  " stylesheet " );

                link.Attributes.Add( " type " ,  " text/css " );

                page.Header.Controls.Add(link);

        }

         ///   <summary>

         ///  添加CSS样式内容

         ///   </summary>

         ///   <param name="page"> 页面 </param>

         ///   <param name="content"> 样式内容 </param>  

         public   void  AddStyle(System.Web.UI.Page page,  string  content)

        {

                HtmlGenericControl styleControl  =   new  HtmlGenericControl( " style " );

                styleControl.Attributes.Add( " type " ,  " text/css " );

                styleControl.InnerHtml  =  content;

                page.Header.Controls.Add(styleControl);

        }

         ///   <summary>

         ///  添加Meta标签

         ///   </summary>

         ///   <param name="page"> 页面 </param>

         ///   <param name="name"> Meta名字 </param>

         ///   <param name="content"> Meta内容 </param>  

         public   void  AddMeta(System.Web.UI.Page page,  string  name,  string  content)

        {

                HtmlMeta meta  =   new  HtmlMeta();

                meta.Name  =  name;

                meta.Content  =  content;

                page.Header.Controls.Add(meta);

        }