自己验证收藏的代码, 用来备份代码, 内容全部来自网上, 时间有些久远, 因此没有标注出处.
using System; using System.Collections.Generic; using System.Data; using System.IO; using System.Linq; using System.Text; using System.Xml; class ClassXML { //声明一个XmlDocument空对象 protected XmlDocument XmlDoc = new XmlDocument(); /// <summary> /// 构造函数，导入Xml文件 /// </summary> /// <param name="xmlFile">文件虚拟路径</param> public ClassXML(string xmlFile) { try { XmlDoc.Load(GetXmlFilePath(xmlFile)); //载入Xml文档 } catch (System.Exception ex) { throw ex; } } /// <summary> /// 析构函数 /// </summary> ~ClassXML() { XmlDoc = null; //释放XmlDocument对象 } /// <summary> /// 保存文件 /// </summary> /// <param name="filePath">文件虚拟路径</param> public void Save(string filePath) { try { XmlDoc.Save(GetXmlFilePath(filePath)); } catch (System.Exception ex) { throw ex; } } /// <summary> /// 返回Xml文件实际路径 /// </summary> /// <param name="xmlFile">文件虚拟路径</param> /// <returns></returns> public string GetXmlFilePath(string xmlFile) { return xmlFile; //return HttpContext.Current.Server.MapPath(xmlFile); } /// <summary> /// 根据Xml文件的节点路径，返回一个DataSet数据集 /// </summary> /// <param name="XmlPathNode">Xml文件的某个节点</param> /// <returns></returns> public DataSet GetDs(string XmlPathNode) { DataSet ds = new DataSet(); try { System.IO.StringReader read = new System.IO.StringReader(XmlDoc.SelectSingleNode(XmlPathNode).OuterXml); ds.ReadXml(read); //利用DataSet的ReadXml方法读取StringReader文件流 read.Close(); } catch { } return ds; } /// <summary> /// 属性查询，返回属性值 /// </summary> /// <param name="XmlPathNode">属性所在的节点</param> /// <param name="Attrib">属性</param> /// <returns></returns> public string SelectAttrib(string XmlPathNode, string Attrib) { string _strNode = ""; try { _strNode = XmlDoc.SelectSingleNode(XmlPathNode).Attributes[Attrib].Value; } catch { } return _strNode; } /// <summary> /// 节点查询，返回节点值 /// </summary> /// <param name="XmlPathNode">节点的路径</param> /// <returns></returns> public string SelectNodeText(string XmlPathNode) { string _nodeTxt = XmlDoc.SelectSingleNode(XmlPathNode).InnerText; if (_nodeTxt == null || _nodeTxt == "") return ""; else return _nodeTxt; } /// <summary> /// 节点值查询判断 /// </summary> /// <param name="XmlPathNode">父节点</param> /// <param name="index">节点索引</param> /// <param name="NodeText">节点值</param> /// <returns></returns> public bool SelectNode(string XmlPathNode, int index, string NodeText) { try { XmlNodeList _NodeList = XmlDoc.SelectNodes(XmlPathNode); //循环遍历节点，查询是否存在该节点 for (int i = 0; i < _NodeList.Count; i++) { if (_NodeList[i].ChildNodes[index].InnerText == NodeText) { return true; break; } } } catch { } return false; } /// <summary> /// 获取子节点个数 /// </summary> /// <param name="XmlPathNode">父节点</param> /// <returns></returns> public int NodeCount(string XmlPathNode) { int i = 0; try { i = XmlDoc.SelectSingleNode(XmlPathNode).ChildNodes.Count; } catch { i = 0; } return i; } /// <summary> /// 更新一个节点的内容 /// </summary> /// <param name="XmlPathNode">节点的路径</param> /// <param name="Content">新的节点值</param> /// <returns></returns> public bool UpdateNode(string XmlPathNode, string NodeContent) { try { XmlDoc.SelectSingleNode(XmlPathNode).InnerText = NodeContent; return true; } catch { return false; } } /// <summary> /// 更新N个节点值 /// </summary> /// <param name="XmlParentNode">父节点</param> /// <param name="XmlNode">子节点</param> /// <param name="NodeContent">子节点内容</param> /// <returns></returns> public bool UpdateNode(string XmlParentNode, string[] XmlNode, string[] NodeContent) { try { //根据节点数组循环修改节点值 for (int i = 0; i < XmlNode.Length; i++) { XmlDoc.SelectSingleNode(XmlParentNode + "/" + XmlNode[i]).InnerText = NodeContent[i]; } return true; } catch { return false; } } /// <summary> /// 修改属性 /// </summary> /// <param name="XmlPathNode">属性所在的节点</param> /// <param name="Attrib">属性名</param> /// <param name="Content">属性值</param> /// <returns></returns> public bool UpdateAttrib(string XmlPathNode, string Attrib, string AttribContent) { try { //修改属性值 XmlDoc.SelectSingleNode(XmlPathNode).Attributes[Attrib].Value = AttribContent; return true; } catch { return false; } } /// <summary> /// 添加属性 /// </summary> /// <param name="MainNode">属性所在节点</param> /// <param name="Attrib">属性名</param> /// <param name="AttribContent">属性值</param> /// <returns></returns> public bool InsertAttrib(string MainNode, string Attrib, string AttribContent) { try { XmlElement objNode = (XmlElement)XmlDoc.SelectSingleNode(MainNode); //强制转化成XmlElement对象 objNode.SetAttribute(Attrib, AttribContent); //XmlElement对象添加属性方法 return true; } catch { return false; } } /// <summary> /// 插入一个节点，带N个子节点 /// </summary> /// <param name="MainNode">插入节点的父节点</param> /// <param name="ChildNode">插入节点的元素名</param> /// <param name="Element">插入节点的子节点名数组</param> /// <param name="Content">插入节点的子节点内容数组</param> /// <returns></returns> public bool InsertNode(string MainNode, string ChildNode, string[] Element, string[] Content) { try { XmlNode objRootNode = XmlDoc.SelectSingleNode(MainNode); //声明XmlNode对象 XmlElement objChildNode = XmlDoc.CreateElement(ChildNode); //创建XmlElement对象 objRootNode.AppendChild(objChildNode); for (int i = 0; i < Element.Length; i++) //循环插入节点元素 { XmlElement objElement = XmlDoc.CreateElement(Element[i]); objElement.InnerText = Content[i]; objChildNode.AppendChild(objElement); } return true; } catch { return false; } } /// <summary> /// 删除一个节点 /// </summary> /// <param name="Node">要删除的节点</param> /// <returns></returns> public bool DeleteNode(string Node) { try { //XmlNode的RemoveChild方法来删除节点及其所有子节点 XmlDoc.SelectSingleNode(Node).ParentNode.RemoveChild(XmlDoc.SelectSingleNode(Node)); return true; } catch { return false; } } }
调用代码:
string _fileName = System.Threading.Thread.GetDomain().BaseDirectory + "Config.xml"; private void LoadPar() { ClassXML xml = new ClassXML(_fileName); edtMachineName.Text = xml.SelectNodeText("Config/MachineName"); edtOrderNO.Text = xml.SelectNodeText("Config/OrderNO"); edtOperator.Text = xml.SelectNodeText("Config/Operator"); } private void SetPar() { ClassXML xml=new ClassXML(_fileName); xml.UpdateNode("Config/MachineName", edtMachineName.Text); xml.UpdateNode("Config/OrderNO", edtOrderNO.Text); xml.UpdateNode("Config/Operator", edtOperator.Text); xml.Save(_fileName); }