winform如何这样操控xml文件？

[ideawork126]

以下为我的xml文件格式

<?xml version="1.0" encoding="utf-8" ?>
<xmlboot>
	<data id="10000" type="up" num="20" bianli="0"/>
	<data id="10001" type="down" num="20" bianli="0"/>
	<data id="10002" type="up" num="20" bianli="0"/>
	..........
	<data id="11000" type="up" num="20" bianli="0"/>			
</xmlboot>

想知道如何随机并不重复的遍历每个data节？遍历到的data节把bianli属性变成1

[ideawork126]

顶！顶！顶！顶！顶！顶！顶！顶！顶！顶！顶！顶！顶！顶！顶！顶！

[冯博1254]

http://blog.csdn.net/manyou/archive/2003/10/02/18729.aspx
看看能不能帮你

[机器人]

static void Main(string[] args)
{
    string xmlFileName = @"D:\VisualStudioProject2008\CSDNAnswer\Linq2Xml_RadomAccess\Linq2Xml_RadomAccess\data.xml";
    XElement xmldoc = XElement.Load(xmlFileName);


    int beginId = 10000;
    int endId = 10003;
    // create a list for iterator (make sure that random id is unique)
    List<string> ids = new List<string>();
    for (int i = beginId; i <= endId; i++)
        ids.Add(i.ToString());

    // set iterator times
    int selectTimes = 2;
    while (selectTimes > 0)
    {
        Random random = new Random(System.Guid.NewGuid().GetHashCode());
        string selectId = ids[random.Next(0, ids.Count-1)];

        var item = (from e in xmldoc.Descendants("data")
                    where e.Attribute("id").Value == selectId
                    select e).FirstOrDefault<XElement>();

        item.Attribute("bianli").Value = "1";

        Console.WriteLine(selectId);
                        
        ids.Remove(selectId);
        selectTimes--;
    }

    xmldoc.Save(xmlFileName);
    Console.Read();
}

[WTPMCheng]

更改bianli的值可以有两种方法：
第一种：先取出值 再更改
第二种：先删除 后添加

[liuwei2500]

string xmlpath = Environment.CurrentDirectory + @"\a.xml";
            XmlDocument doc = new XmlDocument();
            doc.Load(xmlpath);
            XmlNodeList xnl =  doc.SelectNodes("xmlboot/data[@bianli='0']");
            int countResult = xnl.Count;
            Random r = new Random((Int32)System.DateTime.Now.Ticks);
            int currentIndex = r.Next(countResult);
            XmlElement xe = (XmlElement)xnl[currentIndex];
            xe.SetAttribute("bianli", "1");
            doc.Save(xmlpath);

源码已经发到，等待结贴

[ideawork126]

sorry!是我没说清，我的这个操作是定时的，已经有定时设定，随机只是随机抽取指定id的data项

[gohappy2008]

可以参考
http://blog.csdn.net/fishpowersoft/archive/2007/12/21/1957113.aspx

[S_elva]

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;

namespace XML_Example
{
    class about
    {
        /// <summary>
        /// 查看XML内容
        /// </summary>
        /// <param name="path">XML文档路径</param>
        /// <param name="node">查找的节点</param>
        
        public static void ShowXmlInfo(string path,string Nodes)
        {
            XmlDocument doc = new XmlDocument();
            doc.Load("xml_test.xml");//path
            XmlElement root = doc.DocumentElement;
            Console.Write(root.SelectNodes("book")[2].InnerText);//Nodes
        }

        /// <summary>
        /// 添加信息
        /// </summary>
        /// <param name="path">XML文档路径</param>
        /// <param name="Nodes">添加的父节点</param>

        public static void AddXmlInfo(string path, string Nodes)
        {
            XmlDocument doc = new XmlDocument();
            doc.Load("xml_test.xml");//path
            XmlNode root = doc.SelectSingleNode("bookstore");//Nodes
            XmlElement xe1 = doc.CreateElement("book");
            xe1.SetAttribute("genre", "李赞红");
            xe1.SetAttribute("ISBN", "2-3631-4");
            XmlElement xesub1 = doc.CreateElement("title");
            xesub1.InnerText = "C#入门经典";
            xe1.AppendChild(xesub1);
            XmlElement xesub2 = doc.CreateElement("author");
            xesub2.InnerText = "贱人";
            xe1.AppendChild(xesub2);
            XmlElement xesub3 = doc.CreateElement("price");
            xesub3.InnerText = "60";
            xe1.AppendChild(xesub3);
            root.AppendChild(xe1);
            doc.Save("xml_test.xml");
        }

        /// <summary>
        /// 修改信息
        /// </summary>
        /// <param name="path">路径</param>
        /// <param name="Nodes">节点</param>
        
        public static void ReviseXmlInfo(string path, string Nodes)
        {
            XmlDocument xmldoc = new XmlDocument();
            xmldoc.Load("xml_test.xml");
            XmlNodeList nodelist = xmldoc.SelectSingleNode("bookstore").ChildNodes;
            foreach (XmlNode xn in nodelist)
            {
                XmlElement xe = (XmlElement)xn;
                if (xe.GetAttribute("genre") == "李赞红")
                {
                    xe.SetAttribute("genre", "LiZanHong");
                    XmlNodeList nls = xe.ChildNodes;
                    foreach (XmlNode _xn in nls)
                    {
                        XmlElement xe2 = (XmlElement)_xn;
                        if (xe2.Name == "author")
                        {
                            xe2.InnerText = "Jb";
                        }
                        break;
                    }
                    break;
                }
            }
            xmldoc.Save("xml_test.xml");
        }

        /// <summary>
        /// 删除XML信息
        /// </summary>
        /// <param name="path">XML文档路径</param>
        /// <param name="Nodes">节点</param>

        public static void DeleteXmlInfo(string path, string Nodes)
        {
            XmlDocument xmldoc = new XmlDocument();
            xmldoc.Load("xml_test.xml");
            XmlNodeList xnl = xmldoc.SelectSingleNode("bookstore").ChildNodes;
            foreach (XmlNode xn in xnl)
            {
                XmlElement xe = (XmlElement)xn;
                if (xe.GetAttribute("genre") == "fantasy")
                {
                    xe.RemoveAttribute("genre");
                }
                else if (xe.GetAttribute("genre") == "LiZanHong")
                {
                    xe.RemoveAll();
                }
            }
            xmldoc.Save("xml_test.xml");
        }
    }
}

以前的 希望对你有帮助

[fanxingya2012]

不知道楼主的随机是什么意思。8楼的方法应该可以满足你修改节点的要求。随机的话就不怎么好解决了，一般XML都是逐行遍历的。