如何用C#遍历读取这个xml文档呢？

Question

<URL> 
<filehandle>
<Linkurl>http://2010.sina.com.cn/m/fra/2010-06-22/033539186.shtml</Linkurl> 
<LinkThreshold>30</LinkThreshold> 
</filehandle>
<filehandle>
<Linkurl>http://2010.sina.com.cn/m/fra/2009-06-22/033539186.shtml</Linkurl> 
<LinkThreshold>15</LinkThreshold> 
</filehandle>
</URL> 

Answer 1

由于filehandle是由用户设置，故数量不定，但filehandle里均含有linkurl和linkThreshold~~麻烦兄弟们帮忙看看怎么遍历读取啊？

Answer 2

遍历xml三种方法，现在最流行的当然是linq to xml 了

Answer 3

根据这个XML生成一个XSD，然后再根据XSD生成一个类，然后就可以直接把这个XML序列化成那个类，用类读就很方便了

Answer 4

linq刚入门。如果能看到范例就好了

Answer 5

能举个类似的小例子吗？？XML生成一个XSD之类的~~可以吗？

Answer 6

        string xml = @"<Url>
        <filehandle>
<Linkurl>http://2010.sina.com.cn/m/fra/2010-06-22/033539186.shtml</Linkurl>  
<LinkThreshold>30</LinkThreshold>  
</filehandle>
<filehandle>
<Linkurl>http://2010.sina.com.cn/m/fra/2009-06-22/033539186.shtml</Linkurl>  
<LinkThreshold>15</LinkThreshold>  
</filehandle></Url>";
        XmlDocument xd = new XmlDocument();
        //xd.Load(@"D:\aaa.xml");
        xd.LoadXml(xml);        XmlNodeList xnl = xd.GetElementsByTagName("filehandle");
        for (int i = 0; i < xnl.Count; i++)
        {
            XmlNode xnLurl = xnl[i].SelectSingleNode("Linkurl");
            if (xnLurl != null)
            {
                Response.Write(xnLurl.InnerText);
            }
            XmlNode xnLt = xnl[i].SelectSingleNode("LinkThreshold");
            if (xnLt != null)
            {
                Response.Write(xnLt.InnerText);
            }
        }

Answer 7

string xml = @"<URL>  
<filehandle>
<Linkurl>http://2010.sina.com.cn/m/fra/2010-06-22/033539186.shtml</Linkurl>  
<LinkThreshold>30</LinkThreshold>  
</filehandle>
<filehandle>
<Linkurl>http://2010.sina.com.cn/m/fra/2009-06-22/033539186.shtml</Linkurl>  
<LinkThreshold>15</LinkThreshold>  
</filehandle>
</URL>";            LINQ TO XML
            XDocument doc = XDocument.Parse(xml);
            foreach (var v in doc.Element("URL").Elements("filehandle"))
            {
                Console.WriteLine("Linkurl={0}       LinkThreshold={1}", v.Element("Linkurl").Value, v.Element("LinkThreshold").Value);
            }

Answer 8

两个结果一样
            string xml = @"<URL>  
<filehandle>
<Linkurl>http://2010.sina.com.cn/m/fra/2010-06-22/033539186.shtml</Linkurl>  
<LinkThreshold>30</LinkThreshold>  
</filehandle>
<filehandle>
<Linkurl>http://2010.sina.com.cn/m/fra/2009-06-22/033539186.shtml</Linkurl>  
<LinkThreshold>15</LinkThreshold>  
</filehandle>
</URL>";            //LINQ TO XML
            XDocument doc = XDocument.Parse(xml);
            foreach (var v in doc.Element("URL").Elements("filehandle"))
            {
                Console.WriteLine("Linkurl={0}       LinkThreshold={1}", v.Element("Linkurl").Value, v.Element("LinkThreshold").Value);
            }            System.Xml.XmlDocument xdoc = new System.Xml.XmlDocument();
            xdoc.LoadXml(xml);
            foreach (System.Xml.XmlNode n in xdoc.SelectSingleNode("URL").SelectNodes("filehandle"))
            {
                Console.WriteLine("Linkurl={0}       LinkThreshold={1}", n.SelectSingleNode("Linkurl").InnerText, n.SelectSingleNode("LinkThreshold").InnerText);
            }

Answer 9

            //LINQ TO XML
            XDocument doc = XDocument.Parse(xml);            //var Query = from D in doc.Element("URL").Elements("filehandle")
            //            select new { Linkurl = D.Element("Linkurl").Value, LinkThreshold = D.Element("LinkThreshold").Value };            //或者
            var Query = doc.Element("URL").Elements("filehandle").Select(x => new { Linkurl = x.Element("Linkurl").Value, LinkThreshold = x.Element("LinkThreshold").Value });            foreach (var v in Query)
            { 
               Console.WriteLine("Linkurl={0}       LinkThreshold={1}",v.Linkurl,v.LinkThreshold);
            }

Answer 10

//遍历节点，获取你想要获取节点的值，尽量学会自己思考问题。。参考：
/// <summary>
        /// 生产一个XML文件
        /// </summary>
        /// <param name="xmlFilePath">XML文件名</param>
        /// <param name="StartElement">根元素名</param>
        private void CreateXMLFile(string xmlFilePath, string StartElement)
        {
            XmlTextWriter writer = new XmlTextWriter(xmlFilePath, Encoding.UTF8);
            writer.WriteStartDocument();
            writer.WriteStartElement(StartElement);
            writer.WriteEndElement();
            writer.WriteEndDocument();
            writer.Close();
        }        /// <summary>
        /// 向XML文件中增加一个新的元素,属性,值
        /// </summary>
        /// <param name="xmlpath">XML文件名</param>
        /// <param name="element">元素名</param>
        /// <param name="attribut">属性名</param>
        /// <param name="value">值</param>
        /// <returns></returns>
        public bool addXmlElement(string xmlpath, string element, string attribute, string value)
        {
            try
            {
                XmlDocument doc = new XmlDocument();
                doc.Load(xmlpath);
                XmlNode node = doc.SelectSingleNode("//" + element);
                if (node == null)
                {
                    XmlElement xElement = doc.CreateElement(element);
                    xElement.SetAttribute(attribute, value);
                    doc.DocumentElement.AppendChild(xElement);
                }
                else
                {
                    try
                    {
                        if (node.Attributes[attribute] == null)
                        {
                            XmlAttribute newAttr = doc.CreateAttribute(attribute);
                            newAttr.Value = value;
                            node.Attributes.Append(newAttr);
                        }
                        else
                        {
                            string attributesvalue = node.Attributes[attribute].Value;
                            if (attributesvalue != null || attributesvalue != "")
                            {
                                node.Attributes[attribute].Value = value;
                            }
                        }
                    }
                    catch (Exception ex)
                    {
                        XmlAttribute newAttr = doc.CreateAttribute(attribute);
                        newAttr.Value = value;
                        node.Attributes.Append(newAttr);
                    }
                }
                doc.Save(xmlpath);
                return true;
            }
            catch (Exception e)
            {
                return false;
            }
        }        /// <summary>
        /// 更新XML文件中某个元素的属性值
        /// </summary>
        /// <param name="xmlpath">XML文件名</param>
        /// <param name="element">元素名</param>
        /// <param name="attribut">属性名</param>
        /// <param name="value">值</param>
        /// <returns></returns>
        public bool updateValue(string xmlpath, string element, string attribute, string value)
        {
            try
            {
                XmlDocument doc = new XmlDocument();
                doc.Load(xmlpath);
                XmlNode node = doc.SelectSingleNode("//" + element);
                node.Attributes[attribute].Value = value;
                doc.Save(xmlpath);
                return true;
            }
            catch (Exception ex)
            {
                if (addXmlElement(xmlpath, element, attribute, value))
                    return true;
                else
                    return false;
            }
        }        /// <summary>
        /// 从XML文件中读取某个元素的属性值
        /// </summary>
        /// <param name="xmlpath">XML文件名</param>
        /// <param name="element">元素名</param>
        /// <param name="attribut">属性名</param>
        /// <param name="value">值</param>
        /// <returns></returns>
        public string readValue(string xmlpath, string element, string attribute, string value)
        {
            try
            {
                XmlDocument doc = new XmlDocument();
                doc.Load(xmlpath);
                XmlNode node = doc.SelectSingleNode("//" + element);
                if (node.Attributes[attribute].Value.ToString() != "")
                {
                    value = node.Attributes[attribute].Value;
                }
                else
                {
                    addXmlElement(xmlpath, element, attribute, value);
                }
                return value;
            }
            catch (Exception ex)
            {
                if (addXmlElement(xmlpath, element, attribute, value))
                    return value;
                else
                    return "";
            }
        }

Answer 11

用VS自带的工具就可以生成啊，当你打开一个XML文件的时候，VS上就会出现XML的菜单，子菜单上有个生成架构