C#XML文件操作类（二）

using System;
using System.Collections.Generic;
using System.Text;
using System.Xml;
using System.Data;
using System.IO;

/**//// <summary>
/// XML 操作基类
/// </summary>
public class XmlHelper
{
    /**//// <summary>
    /// 读取Xml到DataSet中
    /// </summary>
    /// <param name="XmlPath">路径</param>
    /// <returns>结果集</returns>
    public static DataSet GetXml(string XmlPath)
    {
        DataSet ds = new DataSet();
        ds.ReadXml(@XmlPath);
        return ds;
    }

    /**//// <summary>
    /// 读取xml文档并返回一个节点:适用于一级节点
    /// </summary>
    /// <param name="XmlPath">xml路径</param>
    /// <param name="NodeName">节点</param>
    /// <returns></returns>
    public static string ReadXmlReturnNode(string XmlPath, string Node)
    {
        XmlDocument docXml = new XmlDocument();
        docXml.Load(@XmlPath);
        XmlNodeList xn = docXml.GetElementsByTagName(Node);
        return xn.Item(0).InnerText.ToString();
    }

    /**//// <summary>
    /// 查找数据,返回当前节点的所有下级节点,填充到一个DataSet中
    /// </summary>
    /// <param name="xmlPath">xml文档路径</param>
    /// <param name="XmlPathNode">节点的路径:根节点/父节点/当前节点</param>
    /// <returns></returns>
    public static DataSet GetXmlData(string xmlPath, string XmlPathNode)
    {
        XmlDocument objXmlDoc = new XmlDocument();
        objXmlDoc.Load(xmlPath);
        DataSet ds = new DataSet();
        StringReader read = new StringReader(objXmlDoc.SelectSingleNode(XmlPathNode).OuterXml);
        ds.ReadXml(read);
        return ds;
    }

    /**//// <summary>
    /// 更新Xml节点内容
    /// </summary>
    /// <param name="xmlPath">xml路径</param>
    /// <param name="Node">要更换内容的节点:节点路径 根节点/父节点/当前节点</param>
    /// <param name="Content">新的内容</param>
    public static void XmlNodeReplace(string xmlPath, string Node, string Content)
    {
        XmlDocument objXmlDoc = new XmlDocument();
        objXmlDoc.Load(xmlPath);
        objXmlDoc.SelectSingleNode(Node).InnerText = Content;
        objXmlDoc.Save(xmlPath);

    }

    /**//// <summary>
    /// 更改节点的属性值
    /// </summary>
    /// <param name="xmlPath">文件路径</param>
    /// <param name="NodePath">节点路径</param>
    /// <param name="NodeAttribute1">要更改的节点属性的名称</param>
    /// <param name="NodeAttributeText">更改的属性值</param>
    public static void XmlAttributeEdit(string xmlPath, string NodePath, string NodeAttribute1, string NodeAttributeText)
    {
        XmlDocument objXmlDoc = new XmlDocument();
        objXmlDoc.Load(xmlPath);
        XmlNode nodePath = objXmlDoc.SelectSingleNode(NodePath);
        XmlElement xe = (XmlElement)nodePath;
        xe.SetAttribute(NodeAttribute1, NodeAttributeText);
        objXmlDoc.Save(xmlPath);
    }

    /**//// <summary>
    /// 删除XML节点和此节点下的子节点
    /// </summary>
    /// <param name="xmlPath">xml文档路径</param>
    /// <param name="Node">节点路径</param>
    public static void XmlNodeDelete(string xmlPath, string Node)
    {
        XmlDocument objXmlDoc = new XmlDocument();
        objXmlDoc.Load(xmlPath);
        string mainNode = Node.Substring(0, Node.LastIndexOf("/"));
        objXmlDoc.SelectSingleNode(mainNode).RemoveChild(objXmlDoc.SelectSingleNode(Node));
        objXmlDoc.Save(xmlPath);
    }

    /**//// <summary>
    /// 删除一个节点的属性
    /// </summary>
    /// <param name="xmlPath">文件路径</param>
    /// <param name="NodePath">节点路径（xpath）</param>
    /// <param name="NodeAttribute">属性名称</param>
    public static void xmlnNodeAttributeDel(string xmlPath, string NodePath, string NodeAttribute)
    {
        XmlDocument objXmlDoc = new XmlDocument();
        objXmlDoc.Load(xmlPath);
        XmlNode nodePath = objXmlDoc.SelectSingleNode(NodePath);
        XmlElement xe = (XmlElement)nodePath;
        xe.RemoveAttribute(NodeAttribute);
        objXmlDoc.Save(xmlPath);
    }

    /**//// <summary>
    /// 插入一个节点和此节点的子节点
    /// </summary>
    /// <param name="xmlPath">xml路径</param>
    /// <param name="MailNode">当前节点路径</param>
    /// <param name="ChildNode">新插入节点</param>
    /// <param name="Element">插入节点的子节点</param>
    /// <param name="Content">子节点的内容</param>
    public static void XmlInsertNode(string xmlPath, string MailNode, string ChildNode, string Element, string Content)
    {
        XmlDocument objXmlDoc = new XmlDocument();
        objXmlDoc.Load(xmlPath);
        XmlNode objRootNode = objXmlDoc.SelectSingleNode(MailNode);
        XmlElement objChildNode = objXmlDoc.CreateElement(ChildNode);
        objRootNode.AppendChild(objChildNode);
        XmlElement objElement = objXmlDoc.CreateElement(Element);
        objElement.InnerText = Content;
        objChildNode.AppendChild(objElement);
        objXmlDoc.Save(xmlPath);
    }

    /**//// <summary>
    /// 向一个节点添加属性
    /// </summary>
    /// <param name="xmlPath">xml文件路径</param>
    /// <param name="NodePath">节点路径</param>
    /// <param name="NodeAttribute1">要添加的节点属性的名称</param>
    /// <param name="NodeAttributeText">要添加属性的值</param>
    public static void AddAttribute(string xmlPath, string NodePath, string NodeAttribute1, string NodeAttributeText)
    {
        XmlDocument objXmlDoc = new XmlDocument();
        objXmlDoc.Load(xmlPath);
        XmlAttribute nodeAttribute = objXmlDoc.CreateAttribute(NodeAttribute1);
        XmlNode nodePath = objXmlDoc.SelectSingleNode(NodePath);
        nodePath.Attributes.Append(nodeAttribute);
        XmlElement xe = (XmlElement)nodePath;
        xe.SetAttribute(NodeAttribute1, NodeAttributeText);
        objXmlDoc.Save(xmlPath);
    }

    /**//// <summary>
    /// 插入一节点,带一属性
    /// </summary>
    /// <param name="xmlPath">Xml文档路径</param>
    /// <param name="MainNode">当前节点路径</param>
    /// <param name="Element">新节点</param>
    /// <param name="Attrib">属性名称</param>
    /// <param name="AttribContent">属性值</param>
    /// <param name="Content">新节点值</param>
    public static void XmlInsertElement(string xmlPath, string MainNode, string Element, string Attrib, string AttribContent, string Content)
    {
        XmlDocument objXmlDoc = new XmlDocument();
        objXmlDoc.Load(xmlPath);
        XmlNode objNode = objXmlDoc.SelectSingleNode(MainNode);
        XmlElement objElement = objXmlDoc.CreateElement(Element);
        objElement.SetAttribute(Attrib, AttribContent);
        objElement.InnerText = Content;
        objNode.AppendChild(objElement);
        objXmlDoc.Save(xmlPath);
    }

    /**//// <summary>
    /// 插入一节点,不带属性
    /// </summary>
    /// <param name="xmlPath">Xml文档路径</param>
    /// <param name="MainNode">当前节点路径</param>
    /// <param name="Element">新节点</param>
    /// <param name="Content">新节点值</param>
    public static void XmlInsertElement(string xmlPath, string MainNode, string Element, string Content)
    {
        XmlDocument objXmlDoc = new XmlDocument();
        objXmlDoc.Load(xmlPath);
        XmlNode objNode = objXmlDoc.SelectSingleNode(MainNode);
        XmlElement objElement = objXmlDoc.CreateElement(Element);
        objElement.InnerText = Content;
        objNode.AppendChild(objElement);
        objXmlDoc.Save(xmlPath);
    }

    /**//// <summary>
    /// 在根节点下添加父节点
    /// </summary>
    public static void AddParentNode(string xmlPath,string parentNode)
    {
        XmlDocument xdoc = new XmlDocument();
        xdoc.Load(xmlPath);
        // 创建一个新的menber节点并将它添加到根节点下
        XmlElement Node = xdoc.CreateElement(parentNode);
        xdoc.DocumentElement.PrependChild(Node);
        xdoc.Save(xmlPath);
    }
    
    /**//// <summary>
    /// 根据节点属性读取子节点值(较省资源模式)
    /// </summary>
    /// <param name="XmlPath">xml路径</param>
    /// <param name="FatherElement">父节点值</param>
    /// <param name="AttributeName">属性名称</param>
    /// <param name="AttributeValue">属性值</param>
    /// <param name="ArrayLength">返回的数组长度</param>
    /// <returns></returns>
    public static System.Collections.ArrayList GetSubElementByAttribute(string XmlPath, string FatherElement, string AttributeName, string AttributeValue, int ArrayLength)
    {
        System.Collections.ArrayList al = new System.Collections.ArrayList();
        XmlDocument docXml = new XmlDocument();
        docXml.Load(@XmlPath);
        XmlNodeList xn;
        xn = docXml.DocumentElement.SelectNodes("//" + FatherElement + "[" + @AttributeName + "='" + AttributeValue + "']");
        XmlNodeList xx = xn.Item(0).ChildNodes;
        for (int i = 0; i < ArrayLength & i < xx.Count; i++)
        {

            al.Add(xx.Item(i).InnerText);
        }

        return al;
    }
}