XML 操作

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using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Xml;   namespace ZB.QueueSys.Common {     /// <summary>     /// 用于XML操作     /// </summary>     public class XmlHelper     {         //定义一个用于保存静态变量的实例         private static XmlHelper instance = null;         //定义一个保证线程同步的标识         private static readonly object locker = new object();         //构造函数为私有，使外界不能创建该类的实例         private XmlHelper() { }         public static XmlHelper Instance         {             get             {                 if (instance == null)                 {                     lock (locker)                     {                         if (instance == null) instance = new XmlHelper();                     }                 }                 return instance;             }         }           /// <summary>         /// 根据路径、节点、属性获取属性对应的值         /// </summary>         /// <param name="path">文件路径</param>         /// <param name="nodeName">节点路径，eg:root//am</param>         /// <param name="attributeName">属性名称</param>         /// <returns>属性值</returns>         public string GetAttributeValueByXmlNode(string path, string nodeName, string attributeName)         {             XmlDocument doc = new XmlDocument();             doc.Load(path);               XmlNode node = doc.SelectSingleNode(nodeName);             return node.Attributes[attributeName].Value;         }           /// <summary>         /// 根据路径、节点、属性设置属性对应的值         /// </summary>         /// <param name="path">文件路径</param>         /// <param name="nodeName">节点路径，eg:root//am</param>         /// <param name="attributeName">属性名称</param>         /// <param name="attValue">属性值</param>         public void SetAttributeValueByXmlNode(string path, string nodeName,             string attributeName, string attValue)         {             XmlDocument doc = new XmlDocument();             doc.Load(path);               XmlNode node = doc.SelectSingleNode(nodeName);             node.Attributes[attributeName].Value = attValue;             doc.Save(path);         }           /// <summary>         /// 获取指定节点子节点指定属性的值         /// </summary>         /// <param name="filePath">文件路径</param>         /// <param name="nodePath">节点</param>         /// <param name="attribute">属性名称</param>         /// <returns>List<string>value属性的值</returns>         public List<string> GetNodeItemAttValue(string path, string nodePath, string attribute)         {             XmlDocument doc = new XmlDocument();             doc.Load(path);             XmlNode node = doc.SelectSingleNode(nodePath);             string value = string.Empty;             List<string> list = new List<string>();             if (node == null) return list;             foreach (XmlNode item in node)             {                 value = item.Attributes[attribute].Value;                 list.Add(value);             }               return list;         }           public string GetNodeValueByKey(string path, string nodePath, string direction)         {             XmlDocument doc = new XmlDocument();             doc.Load(path);             XmlNode node = doc.SelectSingleNode(nodePath);             string value = string.Empty;             if (node == null) return string.Empty;             foreach (XmlNode item in node)             {                 if (item.Attributes["ORGANMODE"].Value.Trim() != direction.Trim()) continue;                   return item.Attributes["REMARK"].Value;             }               return value;         }           /// <summary>         /// 获取指定节点所有子节点相关属性         /// </summary>         /// <param name="path">文件路径</param>         /// <param name="nodePath">节点路径</param>         /// <returns>List<MenuDataItem></returns>         public List<MenuItemNodes> GetMenuDataItems(string path, string selectNode)         {             XmlDocument doc = new XmlDocument();             doc.Load(path);             XmlNode node = doc.SelectSingleNode(selectNode);             List<MenuItemNodes> list = new List<MenuItemNodes>();             if (node == null) return list;             foreach (XmlNode item in node)             {                 MenuItemNodes config = new MenuItemNodes();                 config.Value = item.Attributes["content"].Value;                 config.Name = item.Attributes["uiname"].Value;                 config.ImagePath = item.Attributes["imagepath"].Value;                   list.Add(config);             }               return list;         }           /// <summary>         /// 删除指定节点的子节点         /// </summary>         /// <param name="path">文件路径</param>         /// <param name="nodePath">节点路径</param>         /// <returns></returns>         public bool RemoveNodeByNode(string path, string nodePath)         {             XmlDocument doc = new XmlDocument();             doc.Load(path);               XmlNode node = doc.SelectSingleNode(nodePath);             node.InnerText = string.Empty;             doc.Save(path);               return true;         }     }       /// <summary>     /// config.xml item节点属性描述     /// </summary>     public class MenuItemNodes     {         public string Value { get; set; }         public string Name { get; set; }         public string ImagePath { get; set; }     } }