c# xml操作类

 

public class XmlUtility
     {
         protected string strXmlFile;
         protected XmlDocument objXmlDoc = new XmlDocument();
 
         public XmlUtility(string XmlFile)
         {
             try
             {
                 if (!File.Exists(XmlFile))
                  {
                      CreatXmlFile(XmlFile);
                  }
                  objXmlDoc.Load(XmlFile);
 
              }
              catch (System.Exception ex)
              {
                  throw ex;
              }
              strXmlFile = XmlFile;
          }
          protected void CreatXmlFile(string file)
          {
              XmlTextWriter writer = new
              XmlTextWriter(file, Encoding.UTF8);
 
              // start writing!
              writer.WriteStartDocument();
              writer.WriteStartElement("Root");
              writer.WriteEndElement();
              writer.WriteEndDocument();
              writer.Close();
          }
          /// <summary>
          /// 查找数据。返回一个DataSet 多条
          /// </summary>
          /// <param name="XmlPathNode">结点路径</param>
          /// <returns></returns>
          public DataSet GetData(string XmlPathNode)
          {
              //查找数据。返回一个DataSet
              DataSet ds = new DataSet();
              //=========多个=================
              foreach(XmlNode xmlnode in objXmlDoc.SelectNodes(XmlPathNode))
              {
                  StringReader read = new StringReader(xmlnode.OuterXml);
                  ds.ReadXml(read);
              }
              //==============================
              return ds;
          }
          /// <summary>
          /// 查找数据。返回一个DataSet 单条
          /// </summary>
          /// <param name="XmlPathNode"></param>
          /// <returns></returns>
          public DataSet GetDataSingle(string XmlPathNode)
          {
              //查找数据。返回一个DataSet
              DataSet ds = new DataSet();
              //==========单个================
              StringReader read = new StringReader(objXmlDoc.SelectSingleNode(XmlPathNode).OuterXml);
              ds.ReadXml(read);
              //==============================
              return ds;
          }
          /// <summary>
          /// 更新节点内容
          /// </summary>
          /// <param name="XmlPathNode"></param>
          /// <param name="Content"></param>
          public void Replace(string XmlPathNode, string Content)
          {
              //更新节点内容。
              objXmlDoc.SelectSingleNode(XmlPathNode).InnerText = Content;
          }
          /// <summary>
          /// 删除一个节点
          /// </summary>
          /// <param name="Node"></param>
          public void Delete(string Node)
          {
              //删除一个节点。
              string mainNode = Node.Substring(0, Node.LastIndexOf("/"));
              objXmlDoc.SelectSingleNode(mainNode).RemoveChild(objXmlDoc.SelectSingleNode(Node));
          }
          /// <summary>
          /// 插入一个节点和此节点的一子节点
          /// </summary>
          /// <param name="MainNode"></param>
          /// <param name="ChildNode"></param>
          /// <param name="Element"></param>
          /// <param name="Content"></param>
          public void InsertNode(string MainNode, string ChildNode, string Element, string Content)
          {
              //插入一个节点和此节点的一子节点。
              XmlNode objRootNode = objXmlDoc.SelectSingleNode(MainNode);
              XmlElement objChildNode = objXmlDoc.CreateElement(ChildNode);
             objRootNode.AppendChild(objChildNode);
             XmlElement objElement = objXmlDoc.CreateElement(Element);
             objElement.InnerText = Content;
             objChildNode.AppendChild(objElement);
         }
         /// <summary>
         /// 插入一个节点,带一属性
         /// </summary>
         /// <param name="MainNode"></param>
         /// <param name="Element"></param>
         /// <param name="Attrib"></param>
         /// <param name="AttribContent"></param>
         /// <param name="Content"></param>
         public void InsertElement(string MainNode, string Element, string Attrib, string AttribContent, string Content)
         {
             //插入一个节点,带一属性。
             XmlNode objNode = objXmlDoc.SelectSingleNode(MainNode);
             XmlElement objElement = objXmlDoc.CreateElement(Element);
             objElement.SetAttribute(Attrib, AttribContent);
             objElement.InnerText = Content;
             objNode.AppendChild(objElement);
         }
         /// <summary>
         /// 插入一个节点,不带属性
         /// </summary>
         /// <param name="MainNode"></param>
         /// <param name="Element"></param>
         /// <param name="Content"></param>
         public void InsertElement(string MainNode, string Element, string Content)
         {
             XmlNode objNode = objXmlDoc.SelectSingleNode(MainNode);
             XmlElement objElement = objXmlDoc.CreateElement(Element);
             objElement.InnerText = Content;
             objNode.AppendChild(objElement);
         }
         /// <summary>
         /// 保存文件
         /// </summary>
         public void Save()
         {
             //保存文件。
             try
             {
                 objXmlDoc.Save(strXmlFile);
             }
             catch (System.Exception ex)
             {
                 throw ex;
             }
             objXmlDoc = null;
         }
            ///<summary>
            ///获取单个值
            ///</summary>
           public string Read(string path, string node, string attribute)
           {
            string value = "";
            try
            {
                XmlNode xn = objXmlDoc.SelectSingleNode(node);
                value = (attribute.Equals("") ? xn.InnerText : xn.Attributes[attribute].Value);
            }
            catch { }
            return value;
           }

     }

 

 

 

 

string strXmlFile = Server.MapPath("TestXml.xml");
XmlControl xmlTool = new XmlControl(strXmlFile);

// 数据显示 条件：节点BID=1所有数据
// dgList.DataSource = xmlTool.GetData("Book/Authors[BID=\"1\"]").Tables[0];;
// dgList.DataBind();

// 更新元素內容 条件：节点BID=2
// xmlTool.Replace("Book/Authors[BID=\"2\"]/Content","ppppppp");
// xmlTool.Save();

// 添加一个新节点 条件：节点BID=4
// xmlTool.InsertNode("Book","Author","BID","4");
// xmlTool.InsertElement("Book/Author[BID=\"4\"]","Content","aaaaaaaaa");
// xmlTool.InsertElement("Book/Author[BID=\"4\"]","Title","Sex","man","iiiiiiii");
// xmlTool.Save();

// 删除一个指定节点的所有內容和属性 条件：节点BID=4
// xmlTool.Delete("Book/Author[BID=\"4\"]");
// xmlTool.Save();

// 删除一个指定节点的子节点 条件：节点BID内容为4
// xmlTool.Delete("Book/Authors[BID=\"4\"]");
// xmlTool.Save();

// 删除一个指定节点的子节点 条件：节点AuthorsBID的属性Booktype=9
// xmlTool.Delete("Book/Authors[@Booktype=\"9\"]");
// xmlTool.Save();