Asp.net(C#) 输出Xml格式数据Rss生成

   

   XmlWriter.Create(TextWrite output)创建一个实例,可以将Response.Output 直接传入,这样编码是按web.config里面的配置或默认(utf-8)设置的,使用Response.ContentEncoding = Encoding.UTF8;
 可以设置生存xml数据的编码,不过需要放在,XmlWriter.Create之前
 xmlWriter在输出完成后,请使用Flush以保证内容全部输出.
XmlWriterSettings 用来设置Xml 文本串的一些格式(在用记事本查看是的情况,而IE等可以自动进行格式化显示),比方缩进,注意也要放在Create方法前设置.

 代码入下:

   XmlWriterSettings s = new XmlWriterSettings();
    s.Indent = true;
    XmlWriter w = XmlWriter.Create(Response.Output,s);
  
    w.WriteStartDocument();
    w.WriteStartElement("rss");
    w.WriteAttributeString("version", "2.0");
    w.WriteStartElement("channel");
    w.WriteElementString("title", "神鹰医药招商网医药资讯");
    w.WriteElementString("link", "http://news.gyzs.net");
    w.WriteElementString("description", "医药信息，医药网络营销售");
    WriteItem(w,n,flag);
    w.WriteEndElement();
    w.WriteEndElement();
    w.WriteEndDocument();
    w.Flush();
    w.Close();

    Response.ContentType = "text/xml";
    Response.Flush();
    Response.End();

代码2:

private void WriteItem(XmlWriter w,int num,bool flag)
{
   
    using (IDataReader dr = Article.Query().SetTop(num.ToString()).SetSelectList("ID,Title,Summary,AddTime").ORDER_BY("Id Desc").ExecuteReader())
    {
      
        while (dr.Read())
        {
            w.WriteStartElement("item");
            w.WriteAttributeString("id", dr["Id"].ToString());
            //title
            w.WriteStartElement("title");
            w.WriteCData(dr["title"].ToString());
            w.WriteEndElement();
            //link
            w.WriteStartElement("link");
            w.WriteString( "http://news.gyzs.net/article/" + ((DateTime)dr["AddTime"]).ToString("yyyy-MM-dd") + "/" + dr["id"].ToString() + ".html" );
            w.WriteEndElement();
            //description
            w.WriteStartElement("description");
            if (flag)
            {
                w.WriteCData(dr["Summary"].ToString());
            }
            w.WriteEndElement();
            //pubDate
            w.WriteStartElement("pubDate");
            w.WriteString(((DateTime)dr["AddTime"]).ToString() );
            w.WriteEndElement();
            w.WriteEndElement();
        }
      
    }

---------------------下面使用MemoryStream ,StreamWriter 来完成同样的任务

    //MemoryStream ms = new MemoryStream();
    //StreamWriter sw = new StreamWriter(ms, Encoding.GetEncoding("gb2312"));
    //XmlWriter w = XmlWriter.Create(sw);

    //StreamReader sr = new StreamReader(ms, Encoding.GetEncoding("gb2312"));
    //ms.Seek(0, SeekOrigin.Begin);
    //string v = sr.ReadToEnd();
    //sr.Close();
    //Response.Write(v);