c#中操纵XML文件

來源:http://blog.youkuaiyun.com/icycoffee/archive/2007/08/10/1735518.aspx

using System;
using System.Xml;
using System.Web;
namespace MX.XML
...{
    /**//// <summary>
    /// XML核心类:
    /// 必需用XPath表达式来获取相应节点
    /// </summary>
    public class Core
    ...{
        变量-----------------------------------------------------------#region 变量-----------------------------------------------------------
        /**//// <summary>
        /// xml文件所在路径类型
        /// </summary>
        /// <remarks>xml文件所在路径类型</remarks>
        public enum enumXmlPathType
        ...{
            /**///// <summary>
            /// 绝对路径
            /// </summary>
            AbsolutePath,
            /**///// <summary>
            /// 虚拟路径
            /// </summary>
            VirtualPath
        }

        private string xmlFilePath;
        private enumXmlPathType xmlFilePathType;
        private XmlDocument xmlDoc = new XmlDocument();
        #endregion

        属性-----------------------------------------------------------#region 属性-----------------------------------------------------------

        /**//// <summary>
        /// 文件路径
        /// </summary>
        /// <remarks>文件路径</remarks>
        public string XmlFilePath      
        ...{
            get
            ...{
                return this.xmlFilePath;
            }
            set
            ...{
                xmlFilePath = value;

            }
        }
        /**//// <summary>
        /// 文件路径类型
        /// </summary>
        public enumXmlPathType XmlFilePathTyp
        ...{
            set
            ...{
                xmlFilePathType = value;
            }
        }
        #endregion

        构造函数-------------------------------------------------------#region 构造函数-------------------------------------------------------
        /**//// <summary>
        /// 构造函数
        /// </summary>
        /// <param >文件路径</param>
        public Core(string tempXmlFilePath)
        ...{
            this.xmlFilePathType = enumXmlPathType.VirtualPath;
            this.xmlFilePath = tempXmlFilePath;
            GetXmlDocument();
            //xmlDoc.Load( xmlFilePath ) ;
        }

        /**//// <summary>
        /// 构造函数
        /// </summary>
        /// <param >文件路径</param>
        /// <param >类型</param>
        public Core(string tempXmlFilePath, enumXmlPathType tempXmlFilePathType)
        ...{
            this.xmlFilePathType = tempXmlFilePathType;
            this.xmlFilePath = tempXmlFilePath;
            GetXmlDocument();
        }

        /**////<summary>
        ///获取XmlDocument实体类
        ///</summary>    
        /// <returns>指定的XML描述文件的一个xmldocument实例</returns>
        private XmlDocument GetXmlDocument()
        ...{
            XmlDocument doc = null;

            if (this.xmlFilePathType == enumXmlPathType.AbsolutePath)
            ...{
                doc = GetXmlDocumentFromFile(xmlFilePath);
            }
            else if (this.xmlFilePathType == enumXmlPathType.VirtualPath)
            ...{
                doc = GetXmlDocumentFromFile(HttpContext.Current.Server.MapPath(xmlFilePath));
            }
            return doc;
        }

        private XmlDocument GetXmlDocumentFromFile(string tempXmlFilePath)
        ...{
            string xmlFileFullPath = tempXmlFilePath;
            xmlDoc.Load(xmlFileFullPath);
            //定义事件处理
            xmlDoc.NodeChanged += new XmlNodeChangedEventHandler(this.nodeUpdateEvent);
            xmlDoc.NodeInserted += new XmlNodeChangedEventHandler(this.nodeInsertEvent);
            xmlDoc.NodeRemoved += new XmlNodeChangedEventHandler(this.nodeDeleteEvent);
            return xmlDoc;
        }

        #endregion

        获取所有指定名称的节点#region 获取所有指定名称的节点
        /**//// <summary>
        /// 功能:
        /// 获取所有指定名称的节点(XmlNodeList)
        /// </summary>
        /// <param >节点名称</param>
        public XmlNodeList GetXmlNodeList(string strNode)
        ...{
            XmlNodeList strReturn = null;
            try
            ...{
                //根据指定路径获取节点
                XmlNodeList xmlNode = xmlDoc.SelectNodes(strNode);
                if (!(xmlNode == null))
                ...{
                    strReturn = xmlNode;
                }
            }
            catch (XmlException xmle)
            ...{
                throw xmle;
            }
            return strReturn;
        }
        #endregion

        读取指定节点的指定属性值---------------------------------------#region 读取指定节点的指定属性值---------------------------------------
        /**//// <summary>
        /// 功能:
        /// 读取指定节点的指定属性值(Value)
        /// </summary>
        /// <param >节点名称</param>
        /// <param >此节点的属性</param>
        /// <returns></returns>
        public string GetXmlNodeAttributeValue(string strNode, string strAttribute)
        ...{
            string strReturn = "";
            try
            ...{
                //根据指定路径获取节点
                XmlNode xmlNode = xmlDoc.SelectSingleNode(strNode);             
                if (!(xmlNode == null))
                ...{
                    strReturn = xmlNode.Attributes.GetNamedItem(strAttribute).Value;

                    /**/////获取节点的属性，并循环取出需要的属性值
                    //XmlAttributeCollection xmlAttr = xmlNode.Attributes;
                    //for (int i = 0; i < xmlAttr.Count; i++)
                    //{
                    //    if (xmlAttr.Item(i).Name == strAttribute)
                    //    {
                    //        strReturn = xmlAttr.Item(i).Value;
                    //        break;
                    //    }
                    //}
                }
            }
            catch (XmlException xmle)
            ...{
                throw xmle;
            }
            return strReturn;
        }
        #endregion

        读取指定节点的值-----------------------------------------------#region 读取指定节点的值-----------------------------------------------
        /**//// <summary>
        /// 功能:
        /// 读取指定节点的值(InnerText)
        /// </summary>
        /// <param >节点名称</param>
        /// <returns></returns>
        public string GetXmlNodeValue(string strNode)
        ...{
            string strReturn = String.Empty;
            try           
            ...{
                //根据路径获取节点
                XmlNode xmlNode = xmlDoc.SelectSingleNode(strNode);
                if (!(xmlNode == null))
                    strReturn = xmlNode.InnerText;
            }          
            catch (XmlException xmle)
            ...{
                throw xmle;
            }
            return strReturn;
        }
        #endregion

        设置节点值-----------------------------------------------------#region 设置节点值-----------------------------------------------------
        /**//// <summary>
        /// 功能:
        /// 设置节点值(InnerText)
        /// </summary>
        /// <param >节点的名称</param>
        /// <param >节点值</param>
        public void SetXmlNodeValue(string xmlNodePath, string xmlNodeValue)
        ...{
            try
            ...{
                //可以批量为符合条件的节点进行付值
                XmlNodeList xmlNode = this.xmlDoc.SelectNodes(xmlNodePath);
                if (!(xmlNode == null))
                ...{
                    foreach (XmlNode xn in xmlNode)
                    ...{
                        xn.InnerText = xmlNodeValue;
                    }
                }
                /**//**/
                /**//*
                * 根据指定路径获取节点
                XmlNode xmlNode = xmlDoc.SelectSingleNode(xmlNodePath) ;            
                //设置节点值
                if (!(xmlNode==null))
                xmlNode.InnerText = xmlNodeValue ;*/
            }
            catch (XmlException xmle)
            ...{
                throw xmle;
            }
        }
        #endregion

        设置节点的属性值-----------------------------------------------#region 设置节点的属性值-----------------------------------------------
        /**//// <summary>
        /// 功能:
        /// 设置节点的属性值    
        /// </summary>
        /// <param >节点名称</param>
        /// <param >属性名称</param>
        /// <param >属性值</param>
        public void SetXmlNodeAttributeValue(string xmlNodePath, string xmlNodeAttribute, string xmlNodeAttributeValue)
        ...{
            try
            ...{
                //可以批量为符合条件的节点的属性付值
                XmlNodeList xmlNode = this.xmlDoc.SelectNodes(xmlNodePath);
                if (!(xmlNode == null))
                ...{
                    foreach (XmlNode xn in xmlNode)
                    ...{
                        XmlAttributeCollection xmlAttr = xn.Attributes;
                        for (int i = 0; i < xmlAttr.Count; i++)
                        ...{
                            if (xmlAttr.Item(i).Name == xmlNodeAttribute)
                            ...{
                                xmlAttr.Item(i).Value = xmlNodeAttributeValue;
                                break;
                            }
                        }
                    }
                }
            }
            catch (XmlException xmle)
            ...{
                throw xmle;
            }
        }
        #endregion

        添加-----------------------------------------------------------#region 添加-----------------------------------------------------------
        /**//// <summary>
        /// 获取XML文件的根元素
        /// </summary>
        public XmlNode GetXmlRoot()
        ...{
            return xmlDoc.DocumentElement;
        }

        /**//// <summary>
        /// 在根节点下添加父节点
        /// </summary>
        public void AddParentNode(string parentNode)
        ...{
            try           
            ...{
                XmlNode root = GetXmlRoot();
                XmlNode parentXmlNode = xmlDoc.CreateElement(parentNode);
                root.AppendChild(parentXmlNode);
            }
            catch (XmlException xmle)
            ...{
                throw xmle;
            }
        }

        /**//// <summary>
        /// 向一个已经存在的父节点中插入一个子节点,并返回子节点.
        /// </summary>
        /// <param >父节点</param>
        /// <param >字节点名称</param>
        public XmlNode AddChildNode(string parentNodePath, string childnodename)
        ...{
            XmlNode childXmlNode = null;
            try           
            ...{
                XmlNode parentXmlNode = xmlDoc.SelectSingleNode(parentNodePath);
                if (!((parentXmlNode) == null))//如果此节点存在
                ...{
                    childXmlNode = xmlDoc.CreateElement(childnodename);
                    parentXmlNode.AppendChild(childXmlNode);
                }
                else               
                ...{//如果不存在就放父节点添加
                    this.GetXmlRoot().AppendChild(childXmlNode);
                }
            }           
            catch (XmlException xmle)
            ...{
                throw xmle;
            }
            return childXmlNode;
        }
        /**//// <summary>
        /// 向一个已经存在的父节点中插入一个子节点,并添加一个属性
        /// </summary>
        public void AddChildNode(string parentNodePath, string childnodename, string NodeAttribute, string NodeAttributeValue)
        ...{
            try
            ...{
                XmlNode parentXmlNode = xmlDoc.SelectSingleNode(parentNodePath);
                XmlNode childXmlNode = null;
                if (!((parentXmlNode) == null))//如果此节点存在
                ...{
                    childXmlNode = xmlDoc.CreateElement(childnodename);

                    //添加属性
                    XmlAttribute nodeAttribute = this.xmlDoc.CreateAttribute(NodeAttribute);
                    nodeAttribute.Value = NodeAttributeValue;
                    childXmlNode.Attributes.Append(nodeAttribute);

                    parentXmlNode.AppendChild(childXmlNode);
                }
                else               
                ...{//如果不存在就放父节点添加
                    this.GetXmlRoot().AppendChild(childXmlNode);
                }
            }           
            catch (XmlException xmle)
            ...{
                throw xmle;
            }
        }

        /**//// <summary>
        /// 向一个节点添加属性,值为空
        /// </summary>
        /// <param >节点路径</param>
        /// <param >属性名</param>
        public void AddAttribute(string NodePath, string NodeAttribute)
        ...{
            privateAddAttribute(NodePath, NodeAttribute, "");
        }
        /**//// <summary>
        /// 向一个节点添加属性,并赋值***
        /// </summary>
        public void AddAttribute(XmlNode childXmlNode, string NodeAttribute, string NodeAttributeValue)
        ...{
            XmlAttribute nodeAttribute = this.xmlDoc.CreateAttribute(NodeAttribute);
            nodeAttribute.Value = NodeAttributeValue;
            childXmlNode.Attributes.Append(nodeAttribute);
        }

        /**//// <summary>
        /// 向一个节点添加属性
        /// </summary>
        /// <param >节点路径</param>
        /// <param >属性名</param>
        /// <param >属性值</param>
        private void privateAddAttribute(string NodePath, string NodeAttribute, string NodeAttributeValue)
        ...{
            try          
            ...{
                XmlNode nodePath = xmlDoc.SelectSingleNode(NodePath);
                if (!(nodePath == null))
                ...{
                    XmlAttribute nodeAttribute = this.xmlDoc.CreateAttribute(NodeAttribute);
                    nodeAttribute.Value = NodeAttributeValue;
                    nodePath.Attributes.Append(nodeAttribute);
                }
            }            
            catch (XmlException xmle)
            ...{
                throw xmle;
            }
        }
        /**//// <summary>
        ///  向一个节点添加属性,并赋值
        /// </summary>
        /// <param >节点</param>
        /// <param >属性名</param>
        /// <param >属性值</param>
        public void AddAttribute(string NodePath, string NodeAttribute, string NodeAttributeValue)
        ...{
            privateAddAttribute(NodePath, NodeAttribute, NodeAttributeValue);
        }
        #endregion

        删除-----------------------------------------------------------#region 删除-----------------------------------------------------------
        /**//// <summary>
        /// 删除节点的一个属性
        /// </summary>
        /// <param >节点所在的xpath表达式</param>
        /// <param >属性名</param>
        public void DeleteAttribute(string NodePath, string NodeAttribute)
        ...{
            XmlNodeList nodePath = this.xmlDoc.SelectNodes(NodePath);
            if (!(nodePath == null))
            ...{
                foreach (XmlNode tempxn in nodePath)
                ...{
                    XmlAttributeCollection xmlAttr = tempxn.Attributes;
                    for (int i = 0; i < xmlAttr.Count; i++)
                    ...{
                        if (xmlAttr.Item(i).Name == NodeAttribute)
                        ...{
                            tempxn.Attributes.RemoveAt(i);
                            break;
                        }
                    }
                }
            }
        }

        /**//// <summary>
        /// 删除节点的一个属性,当其属性值等于给定的值时
        /// </summary>
        /// <param >节点所在的xpath表达式</param>
        /// <param >属性</param>
        /// <param >值</param>
        public void DeleteAttribute(string NodePath, string NodeAttribute, string NodeAttributeValue)
        ...{
            XmlNodeList nodePath = this.xmlDoc.SelectNodes(NodePath);
            if (!(nodePath == null))
            ...{
                foreach (XmlNode tempxn in nodePath)
                ...{
                    XmlAttributeCollection xmlAttr = tempxn.Attributes;
                    for (int i = 0; i < xmlAttr.Count; i++)
                    ...{
                        if (xmlAttr.Item(i).Name == NodeAttribute && xmlAttr.Item(i).Value == NodeAttributeValue)
                        ...{
                            tempxn.Attributes.RemoveAt(i);
                            break;
                        }
                    }
                }
            }
        }
        /**//// <summary>
        /// 删除节点
        /// </summary>
        /// <param ></param>
        /// <remarks></remarks>
        public void DeleteXmlNode(string tempXmlNode)
        ...{
            XmlNodeList nodePath = this.xmlDoc.SelectNodes(tempXmlNode);
            if (!(nodePath == null))
            ...{
                foreach (XmlNode xn in nodePath)
                ...{
                    xn.ParentNode.RemoveChild(xn);
                }
            }
        }

        #endregion

        XML文档事件----------------------------------------------------#region XML文档事件----------------------------------------------------
        /**//// <summary>
        /// 节点插入事件
        /// </summary>
        /// <param ></param>
        /// <param ></param>
        private void nodeInsertEvent(Object src, XmlNodeChangedEventArgs args)
        ...{
            //保存设置
            SaveXmlDocument();
        }
        /**//// <summary>
        /// 节点删除事件
        /// </summary>
        /// <param ></param>
        /// <param ></param>
        private void nodeDeleteEvent(Object src, XmlNodeChangedEventArgs args)
        ...{
            //保存设置
            SaveXmlDocument();
        }
        /**//// <summary>
        /// 节点更新事件
        /// </summary>
        /// <param ></param>
        /// <param ></param>
        private void nodeUpdateEvent(Object src, XmlNodeChangedEventArgs args)
        ...{
            //保存设置
            SaveXmlDocument();
        }
        #endregion

        保存XML文件----------------------------------------------------#region 保存XML文件----------------------------------------------------
        /**//// <summary>
        /// 功能: 
        /// 保存XML文件
        /// </summary>
        public void SaveXmlDocument()
        ...{
            try
            ...{
                //保存设置的结果
                if (this.xmlFilePathType == enumXmlPathType.AbsolutePath)
                ...{
                    Savexml(xmlFilePath);
                }
                else if (this.xmlFilePathType == enumXmlPathType.VirtualPath)
                ...{
                    Savexml(HttpContext.Current.Server.MapPath(xmlFilePath));
                }
            }
            catch (XmlException xmle)
            ...{
                throw xmle;
            }
        }

        /**//// <summary>
        /// 功能: 
        /// 保存XML文件    
        /// </summary>
        public void SaveXmlDocument(string tempXMLFilePath)
        ...{
            try
            ...{
                //保存设置的结果
                Savexml(tempXMLFilePath);
            }
            catch (XmlException xmle)
            ...{
                throw xmle;
            }
        }
        /**//// <summary>
        /// 
        /// </summary>
        /// <param ></param>
        private void Savexml(string filepath)
        ...{
            xmlDoc.Save(filepath);
        }
        #endregion
    }
}