C#读写XML文件实例代码

C#史上最简单读写xml文件方式，创建控制台应用程序赋值代码，就可以运行，需要改动，请自行调整

创新互联是专业的东河网站建设公司，东河接单;提供成都网站设计、网站制作、外贸营销网站建设,网页设计,网站设计,建网站,PHP网站建设等专业做网站服务;采用PHP框架,可快速的进行东河网站开发网页制作和功能扩展;专业做搜索引擎喜爱的网站,专业的做网站团队,希望更多企业前来合作!

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml;

namespace ConsoleApp1
{
  class Program
  {
    public const String xmlPath = "info.xml";

    static void Main(string[] args)
    {

      IDictionary> infos = new Dictionary>();

      infos.Add("Evan", new List() { "123", "456" });

      SaveXML(infos);

      ReadXML();
      Console.ReadKey();
    }

    public static void SaveXML(IDictionary> infos)
    {
      if (infos == null || infos.Count == 0)
      {
        return;
      }

      XmlDocument xmlDoc = new XmlDocument();

      XmlDeclaration dec = xmlDoc.CreateXmlDeclaration("1.0", "utf-8", null);

      xmlDoc.AppendChild(dec);

      XmlElement _infos = xmlDoc.CreateElement("infos");

      foreach (KeyValuePair> item in infos)
      {
        XmlElement info = xmlDoc.CreateElement("info");

        XmlElement name = xmlDoc.CreateElement("file1");
        name.InnerText = item.Key;

        info.AppendChild(name);

        XmlNode filelist = xmlDoc.CreateElement("filelist");

        info.AppendChild(filelist);

        foreach (String number in item.Value)
        {
          XmlElement filed = xmlDoc.CreateElement("filed");
          filed.InnerText = number;

          filelist.AppendChild(filed);
        }

        _infos.AppendChild(info);
      }

      xmlDoc.AppendChild(_infos);

      xmlDoc.Save(xmlPath);
    }

    public static IDictionary> ReadXML()
    {
      IDictionary> infos = new Dictionary>();

      if (File.Exists(xmlPath))
      {
        XmlDocument xmlDoc = new XmlDocument();

        xmlDoc.Load(xmlPath);

        XmlNode xn = xmlDoc.SelectSingleNode("infos");

        XmlNodeList xnl = xn.ChildNodes;

        foreach (XmlNode xnf in xnl)
        {
          XmlElement xe = (XmlElement)xnf;

          XmlNode nameNode = xe.SelectSingleNode("file1");

          string name = nameNode.InnerText;
          Console.WriteLine(name);
          XmlNode filelist = xe.SelectSingleNode("filelist");

          List list = new List();

          foreach (XmlNode item in filelist.ChildNodes)
          {
            list.Add(item.InnerText);
          }

          infos.Add(name, list);
        }
      }

      return infos;
    }
  }
}

内容扩展：

实例代码

dim domxmldocument as system.xml.xmldocument 
  dim tmppath as string = apptempfilepath 
  dim xmlfile as string = tmppath + "＼testxml.xml" 
 '窗体加载事件 
  private sub testxml_load(byval sender as system.object, byval e as system.eventargs) handles mybase.load 
  '读xml过程测试通过 
  dim domxmldocument as system.xml.xmldocument 
  dim tmppath as string = apptempfilepath 
  dim xmlfile as string = tmppath + "＼testxml.xml" 
  dim reader as system.xml.xmlreader = nothing 
  try 
  reader = new xml.xmltextreader(xmlfile) 
  'reader. 
  while reader.read 
  me.lboxxml.items.add(reader.name + reader.value) 
  end while 
  catch ex as exception 
  msgbox(ex.message) 
  finally 
  if not (reader is nothing) then 
  reader.close() 
  end if 
  end try 
  end sub 
  '载入xml事件 
  private sub btnxmlload_click(byval sender as system.object, byval e as system.eventargs) handles btnxmlload.click 
  'me.lboxxml.items.clear() 
  ''读xml过程测试通过 
  'dim reader as system.xml.xmlreader = nothing 
  'try 
  ' reader = new xml.xmltextreader(xmlfile) 
  ' while reader.read 
  ' me.lboxxml.items.add(reader.name + ":" + reader.value) 
  ' end while 
  'catch ex as exception 
  ' msgbox(ex.message) 
  'finally 
  ' if not (reader is nothing) then 
  ' reader.close() 
  ' end if 
  'end try 
  dim ds as new dataset 
  try 
  '如果直接使用ds做datasource则不会展开datagrid，用dv则能直接显示正确。 
  ds.readxml(xmlfile) 
  dim tb as datatable 
  dim dv as dataview 
  tb = ds.tables(0) 
  dv = new dataview(tb) 
  datagrid1.datasource = dv 
  'datagrid1.datamember = "testxmlmember" 
  'datagrid1.datamember = "employeefname" 
  'dim dxd as new xmldatadocument 
  catch ex as exception 
  msgbox(ex.message.tostring) 
  end try 
  end sub 
  '保存新建xml内容事件 
  private sub btnsavenew_click(byval sender as system.object, byval e as system.eventargs) handles btnsavenew.click 
  dim mytw as new xmltextwriter(tmppath + "＼testxmlwrite.xml", nothing) 
  mytw.writestartdocument() 
  mytw.formatting = formatting.indented 
  mytw.writestartelement("team") 
  mytw.writestartelement("player") 
  mytw.writeattributestring("name", "george zip") 
  mytw.writeattributestring("position", "qb") 
  mytw.writeelementstring("nickname", "zippy") 
  mytw.writeelementstring("jerseynumber", xmlconvert.tostring(7)) 
  mytw.writeendelement() 
  mytw.writeendelement() 
  mytw.writeenddocument() 
  mytw.close() 
  end sub

文件很大的情况下，可以考虑手动实现数据更新适配器，比如手动实现一个xml节点搜索/更新，这样就不用重写整个xml。
如果程序的i/o不是主要问题，还是用实体类整个的写入更新吧，毕竟数据的完整性是第一位的。
如是文章类的，对该目录建一个xml索引文件来存放文章的编号，url等，用xml的attribute作为标记不同字段，内容页面可以用另外的html或xml页面存放，用linq to xml操作数据，效率不是很差，个人观点。当搜索时候只要查询指定文件名xml或文件类型就可以了。

到此这篇关于C# 读写XML文件实例代码的文章就介绍到这了,更多相关C# 读写XML文件最简单方法内容请搜索创新互联以前的文章或继续浏览下面的相关文章希望大家以后多多支持创新互联！

网站名称：C#读写XML文件实例代码
文章起源：http://dzwzjz.com/article/gpcojc.html

大橙子网站建设，新征程启航

C#读写XML文件实例代码

其他资讯