最近需要用到操作xml文档的方法，学习了一下linq to xml，特此记录。
测试代码：
class Program { //参考: LINQ to XML 编程基础 - luckdv - 博客园 http://www.cnblogs.com/luckdv/articles/1728088.html static void Main(string[] args) { string path = @"E:\def\5.xml"; //第一种方法 创建 //XDocument xdoc = new XDocument(new XDeclaration("1.0", "utf-8", "yes"),new XElement("nianhui",new XElement("mingdan",new XText("这里是人名单")),new XElement("jiangxiang",new XText("这里是奖项")))); //xdoc.Save(path); //第二种方法 创建 //XElement root = new XElement("nianhui", // new XElement("first", "名单"), // new XElement("second", "第二项") // ); //root.Save(path); //修改一个Element //XElement rootload = XElement.Load(path); //XElement md = rootload.Element("mingdan"); //if (md != null) //{ // 替换一个节点 // md.ReplaceWith(new XElement("mingdan", "哈哈哈哈")); //} //else //{ // 添加一个节点 // rootload.Add(new XElement("mingdan", "又建了一个")); //} //rootload.Save(path); //创建根节点 //XElement root=new XElement("nianhui"); //root.Save(path); //获取Value值 //string x= GetElementValue(path,"mingda"); //Console.WriteLine(x); //删除节点 //DelElement(path, "mingdan"); //XElement root = XElement.Load(Xpath); //XElement element = root.Element(Xname); //if (element != null) //{ // element.Remove(); //} ////保存修改 操作完成后一定要将修改保存回去 //root.Save(Xpath); //为一级节点添加子节点 //XElement root = XElement.Load(path); //XElement element = root.Element("xing"); //element.Add(new XElement("heihei","what")); //root.Save(path); //------------带属性的xml---------------------------------------------- //创建带属性的xml节点 //XElement xdoc = new XElement("root", new XElement("first",new XAttribute("ID","001")),new XElement("second","行内的value")); //xdoc.Save(path); //创建带多个属性的xml节点 //XElement xdoc = new XElement("root",new XElement("first",new XAttribute("name","002"),new XAttribute("path","abc.txt"))); //xdoc.Save(path); //更新某属性的值 //XElement xdoc = XElement.Load(path); //获取某节点元素 //XElement x = xdoc.Element("first"); //string x2 = x.Attribute("path").Value; //Console.WriteLine(x2); //更新某属性的值 //XElement x3 = xdoc.Element("first"); //if (x3 != null) //{ // XAttribute a1 = x3.Attribute("path"); // if (a1 != null) // { // a1.SetValue("wohuanle"); // } //} //xdoc.Save(path); //获取某属性的值 //XElement xdoc = XElement.Load(path); //XElement x4 = xdoc.Element("first"); //if (x4 != null) //{ // XAttribute a2 = x4.Attribute("path"); // if (a2 != null) // { // Console.WriteLine(a2.Value); // } // else // { // Console.WriteLine(""); // } //} //为某节点添加属性 //XElement xdoc = XElement.Load(path); //XElement x4 = xdoc.Element("first"); //if (x4 != null) //{ // x4.SetAttributeValue("hah", "what"); //} //xdoc.Save(path); //修改某节点的属性 如果不存在该属性则添加 //XElement xdoc = XElement.Load(path); //XElement x4 = xdoc.Element("mingdan"); //if (x4 != null) //{ // XAttribute attr = x4.Attribute("number"); // if (attr != null) // { // //存在该属性 // attr.SetValue("woshixinzengjiade"); // } // else // { // //不存在该属性 // x4.SetAttributeValue("number", "meizhegeshuxing"); // } //} //xdoc.Save(path); //尝试获取xml文档中任意一个节点 但测试不成功 //XElement xdoc = XElement.Load(path); ////XElement x4 = xdoc.Element("mingdan"); //IEnumerable<XElement> element = from e in xdoc.Elements() // where e.Elements().Any(c=>c.Name=="xing") // select e; //foreach (XElement it in element) //{ // Console.WriteLine( it.Value); //} //为某一级节点添加属性 //Dictionary<string,string> ss=new Dictionary<string,string>(); //ss.Add("na","01");ss.Add("nb","02"); //CreateAttr(path, "heihei",ss); //删除某一级子节点的属性 XElement xdoc = XElement.Load(path); XElement x4 = xdoc.Element("mingdan"); if (x4 != null) { if (x4.Attribute("number") != null) { x4.Attribute("number").Remove(); } } xdoc.Save(path); Console.ReadKey(); } #region 为某一级节点添加属性 /// <summary> /// 为某一级节点添加属性 /// </summary> /// <param name="Xpath">文件路径</param> /// <param name="Xname">一级节点名称</param> /// <param name="Attr">属性集</param> static void CreateAttr(string Xpath, string Xname, Dictionary<string, string> Attr) { XElement xdoc = XElement.Load(Xpath); XElement x4 = xdoc.Element(Xname); if (x4 != null) { foreach (var item in Attr) { x4.Add(new XAttribute(item.Key, item.Value)); } } xdoc.Save(Xpath); } #endregion #region 初始化根节点为Xroot的xml文档 /// <summary> /// 初始化根节点为Xroot的xml文档 /// </summary> /// <param name="Xpath"></param> /// <param name="Xroot"></param> void InitElement(string Xpath, string Xroot) { XElement root = new XElement(Xroot); root.Save(Xpath); } #endregion #region 创建或更新节点 /// <summary> /// 创建或更新节点 /// </summary> /// <param name="Xpath"></param> /// <param name="Xname"></param> /// <param name="XValue"></param> void CreateElement(string Xpath, string Xname, string XValue) { //加载xml文档路径 XElement root = XElement.Load(Xpath); //加载某个名称为name的节点 XElement first = root.Element(Xname); if (first != null) { //该名称的节点已存在，替换 first.ReplaceWith(new XElement(Xname, XValue)); } else { //该名称的节点不存在，创建 root.Add(new XElement(Xname, XValue)); } //不要忘记保存修改 root.Save(Xpath); } #endregion #region 获取某节点的Value值 /// <summary> /// 获取某节点的Value值 /// </summary> /// <param name="Xpath"></param> /// <param name="Xname"></param> /// <returns></returns> static string GetElementValue(string Xpath, string Xname) { XElement root = XElement.Load(Xpath); XElement element = root.Element(Xname); if (element != null) { return element.Value; } else { return ""; } } #endregion #region 删除Name为Xname的子节点 /// <summary> /// 删除Name为Xname的子节点 /// </summary> /// <param name="Xpath"></param> /// <param name="Xname"></param> static void DelElement(string Xpath, string Xname) { XElement root = XElement.Load(Xpath); XElement element = root.Element(Xname); if (element != null) { element.Remove(); } //保存修改 root.Save(Xpath); } #endregion }
2014-1-10 10:08:37 新增加一个：
/// <summary> /// 创建或添加一级节点（1个或多个） /// </summary> /// <param name="Xpath"></param> /// <param name="Xelement"></param> static void AddElement(string Xpath, Dictionary<string, string> Xelement) { //加载xml文档路径 XElement root = XElement.Load(Xpath); foreach (var e in Xelement) { //判断当前一级节点是否存在，若存在，则重新设置值，若不存在，则添加 XElement first = root.Element(e.Key); if (first != null) { first.SetValue(e.Value); } else { root.SetElementValue(e.Key, e.Value); } } root.Save(Xpath); }
