XML文档操作工具类

/// <summary>
/// XML文档操作工具类
/// </summary>
public class XmlUtil
{
    #region XML文档节点查询和读取

    /// <summary>
    /// 选择匹配XPath表达式的第一个节点XmlNode.
    /// </summary>
    /// <param name="xmlDoc">XML文档</param>
    /// <param name="xmlFileName">XML文档完全文件名(包含物理路径)</param>
    /// <param name="xpath">要匹配的XPath表达式(例如:"//节点名//子节点名")</param>
    /// <returns>返回XmlNode</returns>
    public static XmlNode GetXmlNodeByXpath(XmlDocument xmlDoc, string xpath)
    {
        try
        {
            XmlNode xmlNode = xmlDoc.SelectSingleNode(xpath);
            return xmlNode;
        }
        catch (Exception ex)
        {
            throw ex; //这里可以定义你自己的异常处理
        }
    }

    /// <summary>
    /// 选择匹配XPath表达式的节点列表XmlNodeList.
    /// </summary>
    /// <param name="xmlFileName">XML文档完全文件名(包含物理路径)</param>
    /// <param name="xpath">要匹配的XPath表达式(例如:"//节点名//子节点名")</param>
    /// <returns>返回XmlNodeList</returns>
    public static XmlNodeList GetXmlNodeListByXpath(XmlDocument xmlDoc, string xpath)
    {
        try
        {
            XmlNodeList xmlNodeList = xmlDoc.SelectNodes(xpath);
            return xmlNodeList;
        }
        catch (Exception ex)
        {
            throw ex; //这里可以定义你自己的异常处理
        }
    }

    /// <summary>
    /// 选择匹配XPath表达式的第一个节点的匹配xmlAttributeName的属性XmlAttribute.
    /// </summary>
    /// <param name="xmlFileName">XML文档完全文件名(包含物理路径)</param>
    /// <param name="xpath">要匹配的XPath表达式(例如:"//节点名//子节点名</param>
    /// <param name="xmlAttributeName">要匹配xmlAttributeName的属性名称，默认为value</param>
    /// <returns>返回xmlAttributeName</returns>
    public static XmlAttribute GetXmlAttribute(XmlDocument xmlDoc, string xpath, params string[] xmlAttributeName)
    {
        string content = string.Empty;
        XmlAttribute xmlAttribute = null;
        try
        {
            XmlNode xmlNode = xmlDoc.SelectSingleNode(xpath);
            if (xmlNode != null)
            {
                if (xmlNode.Attributes.Count > 0)
                {
                    if (int.Equals(xmlAttributeName.Length, 0))
                        xmlAttribute = xmlNode.Attributes["value"];
                    else
                        xmlAttribute = xmlNode.Attributes[xmlAttributeName[0]];
                }
            }
        }
        catch (Exception ex)
        {
            throw ex; //这里可以定义你自己的异常处理
        }
        return xmlAttribute;
    }

    #endregion

    #region XML文档创建和节点或属性的添加、修改

    /// <summary>
    /// 创建一个XML文档
    /// </summary>
    /// <param name="xmlFileName">XML文档完全文件名(包含物理路径)</param>
    /// <param name="rootNodeName">XML文档根节点名称(须指定一个根节点名称)</param>
    /// <param name="version">XML文档信息量(必须为:"1.0")</param>
    /// <param name="encoding">XML文档编码方式</param>
    /// <param name="standalone">该值必须是"yes"或"no",如果为null,Save方法不在XML声明上写出独立属性</param>
    /// <returns>成功返回true,失败返回false</returns>
    public static bool CreateXmlDocument(string xmlFileName, string rootNodeName, string version, string encoding, string standalone)
    {
        bool isSuccess = false;
        try
        {
            XmlDocument xmlDoc = new XmlDocument();
            XmlDeclaration xmlDeclaration = xmlDoc.CreateXmlDeclaration(version, encoding, standalone);
            XmlNode root = xmlDoc.CreateElement(rootNodeName);
            xmlDoc.AppendChild(xmlDeclaration);
            xmlDoc.AppendChild(root);
            xmlDoc.Save(xmlFileName);
            isSuccess = true;
        }
        catch (Exception ex)
        {
            throw ex; //这里可以定义你自己的异常处理
        }
        return isSuccess;
    }

    /// <summary>
    /// 依据匹配XPath表达式的第一个节点来创建它的子节点(如果此节点已存在则追加一个新的同名节点
    /// </summary>
    /// <param name="xmlFileName">XML文档完全文件名(包含物理路径)</param>
    /// <param name="xpath">要匹配的XPath表达式(例如:"//节点名//子节点名</param>
    /// <param name="xmlNodeName">要匹配xmlNodeName的节点名称</param>
    /// <param name="innerText">节点文本值</param>
    /// <param name="xmlAttributeName">要匹配xmlAttributeName的属性名称集合</param>
    /// <param name="value">属性值集合</param>
    /// <returns>成功返回true,失败返回false</returns>
    public static bool CreateXmlNodeByXPath(string xmlFileName, string xpath, string xmlNodeName, string innerText, string[] xmlAttributeName, string[] value)
    {
        bool isSuccess = false;
        XmlDocument xmlDoc = new XmlDocument();
        try
        {
            xmlDoc.Load(xmlFileName); //加载XML文档
            XmlNode xmlNode = xmlDoc.SelectSingleNode(xpath);
            if (xmlNode != null)
            {
                //存不存在此节点都创建
                XmlElement subElement = xmlDoc.CreateElement(xmlNodeName);
                subElement.InnerXml = innerText;

                //如果属性和值参数都不为空则在此新节点上新增属性
                if (xmlAttributeName != null && value != null)
                {
                    for (int i = 0; i < xmlAttributeName.Length; i++)
                    {
                        XmlAttribute xmlAttribute = xmlDoc.CreateAttribute(xmlAttributeName[i]);
                        xmlAttribute.Value = value[i];
                        subElement.Attributes.Append(xmlAttribute);
                    }
                }
                xmlNode.AppendChild(subElement);
            }
            xmlDoc.Save(xmlFileName); //保存到XML文档
            isSuccess = true;
        }
        catch (Exception ex)
        {
            throw ex; //这里可以定义你自己的异常处理
        }
        return isSuccess;
    }

    /// <summary>
    /// 依据匹配XPath表达式的第一个节点来创建或更新它的子节点(如果节点存在则更新,不存在则创建)
    /// </summary>
    /// <param name="xmlFileName">XML文档完全文件名(包含物理路径)</param>
    /// <param name="xpath">要匹配的XPath表达式(例如:"//节点名//子节点名</param>
    /// <param name="xmlNodeName">要匹配xmlNodeName的节点名称</param>
    /// <param name="innerText">节点文本值</param>
    /// <returns>成功返回true,失败返回false</returns>
    public static bool CreateOrUpdateXmlNodeByXPath(string xmlFileName, string xpath, string xmlNodeName, string innerText)
    {
        bool isSuccess = false;
        bool isExistsNode = false;//标识节点是否存在
        XmlDocument xmlDoc = new XmlDocument();
        try
        {
            xmlDoc.Load(xmlFileName); //加载XML文档
            XmlNode xmlNode = xmlDoc.SelectSingleNode(xpath);
            if (xmlNode != null)
            {
                //遍历xpath节点下的所有子节点
                foreach (XmlNode node in xmlNode.ChildNodes)
                {
                    if (node.Name.ToLower() == xmlNodeName.ToLower())
                    {
                        //存在此节点则更新
                        node.InnerXml = innerText;
                        isExistsNode = true;
                        break;
                    }
                }
                if (!isExistsNode)
                {
                    //不存在此节点则创建
                    XmlElement subElement = xmlDoc.CreateElement(xmlNodeName);
                    subElement.InnerXml = innerText;
                    xmlNode.AppendChild(subElement);
                }
            }
            xmlDoc.Save(xmlFileName); //保存到XML文档
            isSuccess = true;
        }
        catch (Exception ex)
        {
            throw ex; //这里可以定义你自己的异常处理
        }
        return isSuccess;
    }

    /// <summary>
    /// 依据匹配XPath表达式的第一个节点来创建或更新它的属性(如果属性存在则更新,不存在则创建)
    /// </summary>
    /// <param name="xmlFileName">XML文档完全文件名(包含物理路径)</param>
    /// <param name="xpath">要匹配的XPath表达式(例如:"//节点名//子节点名</param>
    /// <param name="xmlAttributeName">要匹配xmlAttributeName的属性名称</param>
    /// <param name="value">属性值</param>
    /// <returns>成功返回true,失败返回false</returns>
    public static bool CreateOrUpdateXmlAttributeByXPath(string xmlFileName, string xpath, string value, params string[] xmlAttributeNamePara)
    {
        bool isSuccess = false;
        bool isExistsAttribute = false;//标识属性是否存在
        XmlDocument xmlDoc = new XmlDocument();
        try
        {
            xmlDoc.Load(xmlFileName); //加载XML文档
            XmlNode xmlNode = xmlDoc.SelectSingleNode(xpath);
            if (xmlNode != null)
            {
                //默认为value
                string xmlAttributeName = "value";
                if (xmlAttributeNamePara.Length > 0)
                {
                    xmlAttributeName = xmlAttributeNamePara[0];
                }
                //遍历xpath节点中的所有属性
                foreach (XmlAttribute attribute in xmlNode.Attributes)
                {
                    if (attribute.Name.ToLower() == xmlAttributeName.ToLower())
                    {
                        //节点中存在此属性则更新
                        attribute.Value = value;
                        isExistsAttribute = true;
                        break;
                    }
                }
                if (!isExistsAttribute)
                {
                    //节点中不存在此属性则创建
                    XmlAttribute xmlAttribute = xmlDoc.CreateAttribute(xmlAttributeName);
                    xmlAttribute.Value = value;
                    xmlNode.Attributes.Append(xmlAttribute);
                }
            }
            xmlDoc.Save(xmlFileName); //保存到XML文档
            isSuccess = true;
        }
        catch (Exception ex)
        {
            throw ex; //这里可以定义你自己的异常处理
        }
        return isSuccess;
    }

    #endregion

    #region XML文档节点或属性的删除

    /// <summary>
    /// 删除匹配XPath表达式的第一个节点(节点中的子元素同时会被删除)
    /// </summary>
    /// <param name="xmlFileName">XML文档完全文件名(包含物理路径)</param>
    /// <param name="xpath">要匹配的XPath表达式(例如:"//节点名//子节点名</param>
    /// <returns>成功返回true,失败返回false</returns>
    public static bool DeleteXmlNodeByXPath(string xmlFileName, string xpath)
    {
        bool isSuccess = false;
        XmlDocument xmlDoc = new XmlDocument();
        try
        {
            xmlDoc.Load(xmlFileName); //加载XML文档
            XmlNode xmlNode = xmlDoc.SelectSingleNode(xpath);
            if (xmlNode != null)
            {
                //删除节点
                xmlNode.ParentNode.RemoveChild(xmlNode);
            }
            xmlDoc.Save(xmlFileName); //保存到XML文档
            isSuccess = true;
        }
        catch (Exception ex)
        {
            throw ex; //这里可以定义你自己的异常处理
        }
        return isSuccess;
    }

    /// <summary>
    /// 删除匹配XPath表达式的第一个节点中的匹配参数xmlAttributeName的属性
    /// </summary>
    /// <param name="xmlFileName">XML文档完全文件名(包含物理路径)</param>
    /// <param name="xpath">要匹配的XPath表达式(例如:"//节点名//子节点名</param>
    /// <param name="xmlAttributeName">要删除的xmlAttributeName的属性名称</param>
    /// <returns>成功返回true,失败返回false</returns>
    public static bool DeleteXmlAttributeByXPath(string xmlFileName, string xpath, string xmlAttributeName)
    {
        bool isSuccess = false;
        bool isExistsAttribute = false;
        XmlDocument xmlDoc = new XmlDocument();
        try
        {
            xmlDoc.Load(xmlFileName); //加载XML文档
            XmlNode xmlNode = xmlDoc.SelectSingleNode(xpath);
            XmlAttribute xmlAttribute = null;
            if (xmlNode != null)
            {
                //遍历xpath节点中的所有属性
                foreach (XmlAttribute attribute in xmlNode.Attributes)
                {
                    if (attribute.Name.ToLower() == xmlAttributeName.ToLower())
                    {
                        //节点中存在此属性
                        xmlAttribute = attribute;
                        isExistsAttribute = true;
                        break;
                    }
                }
                if (isExistsAttribute)
                {
                    //删除节点中的属性
                    xmlNode.Attributes.Remove(xmlAttribute);
                }
            }
            xmlDoc.Save(xmlFileName); //保存到XML文档
            isSuccess = true;
        }
        catch (Exception ex)
        {
            throw ex; //这里可以定义你自己的异常处理
        }
        return isSuccess;
    }

    /// <summary>
    /// 删除匹配XPath表达式的第一个节点中的所有属性
    /// </summary>
    /// <param name="xmlFileName">XML文档完全文件名(包含物理路径)</param>
    /// <param name="xpath">要匹配的XPath表达式(例如:"//节点名//子节点名</param>
    /// <returns>成功返回true,失败返回false</returns>
    public static bool DeleteAllXmlAttributeByXPath(string xmlFileName, string xpath)
    {
        bool isSuccess = false;
        XmlDocument xmlDoc = new XmlDocument();
        try
        {
            xmlDoc.Load(xmlFileName); //加载XML文档
            XmlNode xmlNode = xmlDoc.SelectSingleNode(xpath);
            if (xmlNode != null)
            {
                //遍历xpath节点中的所有属性
                xmlNode.Attributes.RemoveAll();
            }
            xmlDoc.Save(xmlFileName); //保存到XML文档
            isSuccess = true;
        }
        catch (Exception ex)
        {
            throw ex; //这里可以定义你自己的异常处理
        }
        return isSuccess;
    }

    #endregion
}