XML 操作基类

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;
}
}