asp.net操作 META信息代码,Asp.NET代码库,德仔网

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【Asp.NET】 asp.net操作 META信息
作者: / 发布于2016/7/28/ 513
public void setMeta(string key,string des)

    {

        HtmlMeta

            keywords = new HtmlMeta(), // keywords

            description = new HtmlMeta(); // description

        keywords.Name = "keywords";

        keywords.Content = key;

        description.Name = "description";

        description.Content = des;

        Page.Header.Controls.Add(keywords);

        Page.Header.Controls.Add(description);

    }

在ASP.NET编程中，由于经常采用一个页面通过不同的参数来显示不同的内容，因此常常需要实现动态输出不同的html header, 比如title, keywords, descrtptions等。

推荐的简单做法如下:

protected void Page_Load(object sender, EventArgs e)

{

   //Page title

   Page.Title = "This is a title and meta test page.";

   //Encode/Content type

   HtmlMeta encode = new HtmlMeta();

   encode.HttpEquiv = "Content-Type";

   encode.Content = "text/html; charset=utf-8";

   Page.Header.Controls.Add(encode);

   //Language

   HtmlMeta lang = new HtmlMeta();

   lang.HttpEquiv = "Content-Language";

   lang.Content = "zh-cn";

   Page.Header.Controls.Add(lang);

   //Description

   HtmlMeta desc = new HtmlMeta();

   desc.Name = "Description";

   desc.Content = "Test the meta controls";

   Page.Header.Controls.Add(desc);

   //Keyword

   HtmlMeta keywords = new HtmlMeta();

   keywords.Name = "keywords";

   keywords.Content = "title,meta,test,page";

   Page.Header.Controls.Add(keywords);

   //Link/CSS

   HtmlLink cssLink = new HtmlLink();

   cssLink.Href = "MasterPage.css";

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

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

   Page.Header.Controls.Add(cssLink);

}

浏览时输出的页面源码便会达到如下效果：

<head><title>

This is a title and meta test page.

</title><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><meta http-equiv="Content-Language" content="zh-cn" /><meta name="Description" content="Test the meta controls" /><<meta name="keywords" content="title,meta,test,page" /><link href="MasterPage.css" rel="stylesheet" type="text/css" /></head>

由于需要动态修改Header的Controls集合，因此如果放在用户自定义控件的Page_Onload事件中因为已经太迟而到处出现异常。对于希望用通用的控件实现这一功能的场合，建议包装一个普通的类，然后在MasterPager或者Page的Page_OnLoad中调用一下即可。

#region PAGE HEAD

        //Page meta information

        public void BackHeadContent(HtmlControl htmlCtrl)

        {

            Content(htmlCtrl, "网站后台管理系统", "~/CssStyle/SiteStyles.css");

        }

        public void HeadContent(HtmlControl htmlCtrl, string strPageTitle)

        {

            Content(htmlCtrl, strPageTitle, "~/CssStyle/Styles.css");

        }

      

        private void Content(HtmlControl htmlCtrl, string strTitle,string cssFile)

        {

            //Title

            HtmlTitle title = new HtmlTitle();

            title.Text = strTitle;

            htmlCtrl.Controls.Add(title);

            //Link/CSSfile:

            HtmlLink cssLink = new HtmlLink();

            cssLink.Href = cssFile;

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

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

            htmlCtrl.Controls.Add(cssLink);

            HtmlMeta

            author = new HtmlMeta(), // author

            copyright = new HtmlMeta(), // copyright

            date = new HtmlMeta(), // date

            keywords = new HtmlMeta(), // keywords

            description = new HtmlMeta(), // description

            robots = new HtmlMeta();// robots

            author.Name = "Author";

            author.Content = "Insus.NET";

            copyright.Name = "Copyright";

            copyright.Content = "Copyright 2008 Insus.NET";

            date.Name = "date";

            date.Content = DateTime.Now.ToShortDateString() + " " + DateTime.Now.ToShortTimeString();

            keywords.Name = "keywords";

            keywords.Content = "Insus ";

            description.Name = "description";

            robots.Name = "robots";

            robots.Content = "all";

            string[] InsusWords = "VISUAL STUDIO 2003,VISUAL STUDIO 2005,Microsoft SQL Server 2005,ASP.NET,ASP.NET 2.0,VB.NET,C#,AJAX,LINQ"

              .Replace("\\r", string.Empty)

              .Replace("\\n", string.Empty)

              .Replace(">br />", string.Empty)

              .Replace(",", string.Empty)

              .Replace("\\'", string.Empty)

              .Split(' ');

            foreach (string word in InsusWords)

                keywords.Content += word + ",";

            if (keywords.Content.ToString().Length > 1024)

            {

                keywords.Content = keywords.Content.Substring(0, keywords.Content.IndexOf(" ", 1024));

            }

            description.Content = "This web site use asp.net2.0 and C# and Ajax technology";

            if (description.Content.ToString().Length > 1024)

            {

                description.Content = description.Content.Substring(0, description.Content.IndexOf(" ", 1024));

            }

            htmlCtrl.Controls.Add(author);

            htmlCtrl.Controls.Add(copyright);

            htmlCtrl.Controls.Add(date);

            htmlCtrl.Controls.Add(keywords);

            htmlCtrl.Controls.Add(description);

            htmlCtrl.Controls.Add(robots);

        }

        #endregion PAGE HEAD
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