asp.net实现输出xml的方法

本文实例讲述了asp.net实现输出xml的方法。分享给大家供大家参考，具体如下：

#region 根据xml节点 查询xml节点的值并作修改
/// <summary>
/// 根据xml节点 查询xml节点的值并作修改
/// </summary>
/// <param name="filename">要加载的xml文件</param>
/// <param name="tagname">xml节点的名称</param>
/// <param name="newxmltext">修改后的值</param>
/// <returns></returns>
public void getxmlbyselnodel(string filename, string selnodename, string tagname,string newxmltext)
{
  try
  {
   doc.load(server.mappath(filename));
   xmlnodelist nodelist = doc.documentelement.selectsinglenode(selnodename).childnodes;
   foreach (xmlnode node in nodelist)
   {
    xmlelement xle = node as xmlelement;
    xmlnodelist list = xle.childnodes;
    for (int j = 0; j < list.count; j++) {
     if (xle.childnodes[j].name == tagname) {
      xle.childnodes[j].innertext = newxmltext;
      savexml(filename);
      break;
     }
    }
   }
  }
  catch { 
  }
}
#endregion
#region 保存修改后xml文件内容
//保存修改后xml文件内容
public void savexml(string filename)
{
  doc.save(server.mappath(filename));
}
#endregion
string selnodename="//url/data";
string filename = "meituanapi.xml";
getxmlbyselnodel(filename, selnodename, "website", "");
getxmlbyselnodel(filename, selnodename, "siteurl", "www.jb51.net");
getxmlbyselnodel(filename, selnodename, "city", "杭州");
getxmlbyselnodel(filename, selnodename, "tip", "送ipad 抽奖!!");
getxmlbyselnodel(filename, "//data/shops", "name", "上海洲信 信息技术有限公司!");
dataset ds = new dataset();
ds.readxml(server.mappath("meituanapi.xml"));
xmltextwriter writer = new xmltextwriter(response.outputstream, response.contentencoding);
ds.tables[0].writexml(writer);
response.contenttype = "text/xml;charset=gb2312";
response.flush();
response.end()

或者

response.clearcontent();
response.clearheaders();
response.contenttype="application/xml"';
response.writerfile(server.mappath("api/54tuanapi.xml"));
response.flush();
response.end();

希望本文所述对大家asp.net程序设计有所帮助。