using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Windows.Forms;namespace MyCommanHelper
{public class XMLHelper{#region 读取节点值/// <summary>/// 读取节点值/// </summary>/// <param name="doc"></param>/// <param name="Section"></param>/// <param name="Key"></param>/// <returns></returns>public static string XmlReadValue(XmlDocument doc, string Section, string Key){XmlNode result = doc.SelectSingleNode(Section);string ss = "";if (null != result){ss = result.SelectSingleNode(Key).InnerText;}return ss;}/// <summary>/// 获取二层小结下的键值/// </summary>/// <param name="doc"></param>/// <param name="Section"></param>/// <param name="subSection"></param>/// <param name="Key"></param>/// <returns></returns>public static string XmlReadValue(XmlDocument doc, string Section, string subSection, string Key){try{XmlNode result = doc.SelectSingleNode(Section);if (null != result){XmlNodeList childnodes = result.ChildNodes;for (int i = 0; i < childnodes.Count; i++){XmlNode node = childnodes[i];if (node.LocalName.Equals(subSection)){return node.SelectSingleNode(Key).InnerText;}}}return "";}catch{return "";}}/// <summary>/// 获取三层小结下的键值/// </summary>/// <param name="doc"></param>/// <param name="Section"></param>/// <param name="subSection"></param>/// <param name="sub2Section"></param>/// <param name="Key"></param>/// <returns></returns>public static string XmlReadValue(XmlDocument doc, string Section, string subSection, string sub2Section, string Key){try{XmlNode result = doc.SelectSingleNode(Section);if (null != result){XmlNodeList parentNodes = result.ChildNodes;for (int i = 0; i < parentNodes.Count; i++){XmlNode node = parentNodes[i];if (node.LocalName.Equals(subSection)){XmlNodeList childNodes = node.ChildNodes;for (int j = 0; j < childNodes.Count; j++){XmlNode subNode = childNodes[j];if (subNode.LocalName.Equals(sub2Section)){return subNode.SelectSingleNode(Key).InnerText;}}}}}return "";}catch (Exception){return "";}}/// <summary>/// 获取四层小结下的键值/// </summary>/// <param name="doc"></param>/// <param name="Section"></param>/// <param name="subSection"></param>/// <param name="sub2Section"></param>/// <param name="sub3Section"></param>/// <param name="Key"></param>/// <returns></returns>public static string XmlReadValue(XmlDocument doc, string Section, string subSection, string sub2Section, string sub3Section, string Key){try{XmlNode result = doc.SelectSingleNode(Section);if (null != result){XmlNodeList childnodes = result.ChildNodes;for (int i = 0; i < childnodes.Count; i++){XmlNode node = childnodes[i];if (node.LocalName.Equals(subSection)){XmlNodeList subNodeList = node.ChildNodes;for (int j = 0; j < subNodeList.Count; j++){XmlNode subNode = subNodeList[j];if (subNode.LocalName.Equals(sub2Section)){XmlNodeList sub2NodeList = subNode.ChildNodes;for (int k = 0; k < sub2NodeList.Count; k++){XmlNode sub2Node = sub2NodeList[k];if (sub2Node.LocalName.Equals(sub3Section)){return sub2Node.SelectSingleNode(Key).InnerText;}}}}}}}return "";}catch{return "";}}#endregion#region 写入节点值/// <summary>/// 写入节点值/// </summary>/// <param name="doc"></param>/// <param name="sXMLPath"></param>/// <param name="Section"></param>/// <param name="Key"></param>/// <param name="Value"></param>public static void XmlWriteValue(XmlDocument doc, string sXMLPath, string Section, string Key, string Value){try{XmlNode result = doc.SelectSingleNode(Section);if (null == result){result = (XmlNode)doc.CreateElement(Section);doc.AppendChild(result);XmlNode subNode = doc.CreateElement(Key);subNode.InnerText = Value;result.AppendChild(subNode);}else{XmlNode subNode = result.SelectSingleNode(Key);if (null == subNode){subNode = doc.CreateElement(Key);subNode.InnerText = Value;result.AppendChild(subNode);}else{subNode.InnerText = Value;}}doc.Save(sXMLPath);}catch (System.Exception ex){MessageBox.Show("写入节点值错误! " + ex.Message);}}public static void XmlWriteValue(XmlDocument doc, string sXMLPath, string Section, string subSection, string Key, string Value){try{XmlNode result = doc.SelectSingleNode(Section);if (null == result){result = (XmlNode)doc.CreateElement(Section);doc.AppendChild(result);XmlElement subEle = doc.CreateElement(subSection);result.AppendChild(subEle);XmlElement sub2Ele = doc.CreateElement(Key);sub2Ele.InnerText = Value;subEle.AppendChild(sub2Ele);}else{XmlNode subEle = result.SelectSingleNode(subSection);if (null == subEle){subEle = doc.CreateElement(subSection);result.AppendChild(subEle);XmlElement sub2Ele = doc.CreateElement(Key);sub2Ele.InnerText = Value;subEle.AppendChild(sub2Ele);} else{XmlNode sub2Ele = subEle.SelectSingleNode(Key);if (null == sub2Ele){sub2Ele = doc.CreateElement(Key);sub2Ele.InnerText = Value;subEle.AppendChild(sub2Ele);} else{sub2Ele.InnerText = Value;}}}}catch (System.Exception ex){MessageBox.Show("写入节点值错误! " + ex.Message);}}public static void XmlWriteValue(XmlDocument doc, string sXMLPath, string Section, string subSection, string sub2Section, string Key, string Value){try{XmlNode result = doc.SelectSingleNode(Section);if (null == result){result = (XmlNode)doc.CreateElement(Section);doc.AppendChild(result);}XmlNode subEle = result.SelectSingleNode(subSection);if (null == subEle){subEle = doc.CreateElement(subSection);result.AppendChild(subEle);}XmlNode sub2Ele = result.SelectSingleNode(sub2Section);if (null == sub2Ele){sub2Ele = doc.CreateElement(sub2Section);subEle.AppendChild(sub2Ele);}XmlNode sub3Ele = subEle.SelectSingleNode(Key);if (null == sub3Ele){sub3Ele = doc.CreateElement(Key);sub3Ele.InnerText = Value;sub2Ele.AppendChild(sub2Ele);}else{sub3Ele.InnerText = Value;}doc.Save(sXMLPath);}catch (System.Exception ex){MessageBox.Show("写入节点值错误! " + ex.Message);}}public static void XmlWriteValue(XmlDocument doc, string sXMLPath,string Section, string subSection, string sub2Section,string sub3Section, string Key, string Value){try{XmlNode result = doc.SelectSingleNode(Section);if (null == result){result = (XmlNode)doc.CreateElement(Section);doc.AppendChild(result);}XmlNode subEle = result.SelectSingleNode(subSection);if (null == subEle){subEle = doc.CreateElement(subSection);result.AppendChild(subEle);}XmlNode sub2Ele = result.SelectSingleNode(sub2Section);if (null == sub2Ele){sub2Ele = doc.CreateElement(sub2Section);subEle.AppendChild(sub2Ele);}XmlNode sub3Ele = result.SelectSingleNode(sub3Section);if (null == sub2Ele){sub3Ele = doc.CreateElement(sub3Section);sub2Ele.AppendChild(sub3Ele);}XmlNode sub4Ele = subEle.SelectSingleNode(Key);if (null == sub3Ele){sub4Ele = doc.CreateElement(Key);sub4Ele.InnerText = Value;sub3Ele.AppendChild(sub2Ele);}else{sub4Ele.InnerText = Value;}doc.Save(sXMLPath);}catch (System.Exception ex){MessageBox.Show("写入节点值错误! " + ex.Message);}}#endregion#region 修改节点值/// <summary>/// 修改节点值/// </summary>/// <param name="doc"></param>/// <param name="sXMLPath"></param>/// <param name="Section"></param>/// <param name="Key"></param>/// <param name="Value"></param>public static void XmlEditValue(XmlDocument doc, string sXMLPath, string Section, string Key, string Value){XmlNode result = doc.SelectSingleNode(Section);if (null != result){if (Value == ""){result.SelectSingleNode(Key).InnerText = "无";}else{result.SelectSingleNode(Key).InnerText = Value;}}doc.Save(sXMLPath);}public static void XmlEditValue(XmlDocument doc, string sXMLPath, string Section, string sValue1, string Key, string Value){XmlNode result = doc.SelectSingleNode(Section);if (null != result){XmlNodeList childnodes = result.ChildNodes;for (int i = 0; i < childnodes.Count; i++){XmlNode node = childnodes[i];if (node.LocalName.Equals(sValue1)){if (Value == ""){node.SelectSingleNode(Key).InnerText = "无";}else{node.SelectSingleNode(Key).InnerText = Value;}}}}doc.Save(sXMLPath);}public static void XmlEditValue(XmlDocument doc, string sXMLPath,string Section, string sValue1,string sValue2, string Key, string Value){XmlNode result = doc.SelectSingleNode(Section);if (null != result){XmlNodeList parentNodes = result.ChildNodes;for (int ii = 0; ii < parentNodes.Count; ii++){XmlNode node = parentNodes[ii];if (node.LocalName.Equals(sValue1)){XmlNodeList childNodes = node.ChildNodes;for (int i = 0; i < childNodes.Count; i++){XmlNode node2 = childNodes[i];if (node2.LocalName.Equals(sValue2)){if (Value == ""){node2.SelectSingleNode(Key).InnerText = "无";}else{node2.SelectSingleNode(Key).InnerText = Value;}}}}}}doc.Save(sXMLPath);}public static void XmlEditValue(XmlDocument doc, string sXMLPath,string Section, string sValue1, string sValue2,string sValue3, string Key, string Value){XmlNode node = doc.SelectSingleNode(Section);if (null != node){XmlNodeList childNodes = node.ChildNodes;for (int i = 0; i < childNodes.Count; i++){XmlNode node2 = childNodes[i];if (node2.LocalName.Equals(sValue1)){XmlNodeList list2 = node2.ChildNodes;for (int j = 0; j < list2.Count; j++){XmlNode node3 = list2[j];if (node3.LocalName.Equals(sValue2)){XmlNodeList list3 = node3.ChildNodes;for (int k = 0; k < list3.Count; k++){XmlNode node4 = list3[k];if (node4.LocalName.Equals(sValue3)){if (Value == ""){node4.SelectSingleNode(Key).InnerText = "无";}else{node4.SelectSingleNode(Key).InnerText = Value;}}}}}}}}doc.Save(sXMLPath);}#endregion }
}

 public void createXml(double meters){XmlDocument xml = new XmlDocument();//xml文件的相对路径string stringPath = Application.ExecutablePath.Substring(0, Application.ExecutablePath.LastIndexOf('\\')) + "\\searchStation.xml";if (!System.IO.File.Exists(stringPath)){System.IO.FileStream fileStream = new System.IO.FileStream(stringPath, System.IO.FileMode.Create, System.IO.FileAccess.ReadWrite, System.IO.FileShare.ReadWrite);fileStream.Close();System.IO.File.WriteAllText(stringPath, "<?xml version=\"1.0\"?><ROOT><AREA>"+meters.ToString()+"</AREA></ROOT>");}xml.Load(stringPath);XmlNode nodes = xml.DocumentElement;foreach (XmlNode item in nodes.ChildNodes){if (item.Name == "AREA"){item.InnerText = meters.ToString();}}xml.Save(stringPath);}