C#常用操作类库三(XML操作类)

时间:2021-07-02 20:06:02
/// <summary>
/// XmlHelper 的摘要说明。
/// xml操作类
/// </summary>
public class XmlHelper
{
protected string strXmlFile;
protected XmlDocument objXmlDoc = new XmlDocument(); public XmlHelper(string XmlFile)
{
//
// TODO: 在这里加入建构函式的程序代码
//
try
{ objXmlDoc.Load(XmlFile);
}
catch (System.Exception ex)
{
throw ex;
}
strXmlFile = XmlFile;
} public DataTable GetData(string XmlPathNode)
{
//查找数据。返回一个DataView
DataSet ds = new DataSet();
StringReader read = new StringReader(objXmlDoc.SelectSingleNode(XmlPathNode).OuterXml);
ds.ReadXml(read);
return ds.Tables[];
}
/// <summary>
/// 新节点内容。
/// 示例:xmlTool.Replace("Book/Authors[ISBN=\"0002\"]/Content","ppppppp");
/// </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>
/// 删除一个指定节点的子节点。
/// 示例: xmlTool.DeleteChild("Book/Authors[ISBN=\"0003\"]");
/// </summary>
/// <param name="Node"></param>
public void DeleteChild(string Node)
{
//删除一个节点。
string mainNode = Node.Substring(, Node.LastIndexOf("/"));
objXmlDoc.SelectSingleNode(mainNode).RemoveChild(objXmlDoc.SelectSingleNode(Node));
} /// <summary> /// * 使用示列:
/// 示例: XmlHelper.Delete( "/Node", "")
/// XmlHelper.Delete( "/Node", "Attribute")
/// </summary>
/// <param name="node">节点</param>
/// <param name="attribute">属性名,非空时删除该节点属性值,否则删除节点值</param>
public void Delete( string node, string attribute)
{
try
{ XmlNode xn = objXmlDoc.SelectSingleNode(node);
XmlElement xe = (XmlElement)xn;
if (attribute.Equals(""))
xn.ParentNode.RemoveChild(xn);
else
xe.RemoveAttribute(attribute); }
catch { }
} /// <summary>
/// 插入一节点和此节点的一子节点。
/// 示例:xmlTool.InsertNode("Book","Author","ISBN","0004");
/// </summary>
/// <param name="MainNode">主节点</param>
/// <param name="ChildNode">子节点</param>
/// <param name="Element">元素</param>
/// <param name="Content">内容</param>
public void InsertNode(string MainNode, string ChildNode, string Element, string Content)
{
//插入一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。
/// 示例: xmlTool.InsertElement("Book/Author[ISBN=\"0004\"]","Title","Sex","man","iiiiiiii");
/// </summary>
/// <param name="MainNode">主节点</param>
/// <param name="Element">元素</param>
/// <param name="Attrib">属性</param>
/// <param name="AttribContent">属性内容</param>
/// <param name="Content">元素内容</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。
/// 示例:xmlTool.InsertElement("Book/Author[ISBN=\"0004\"]","Content","aaaaaaaaa");
/// </summary>
/// <param name="MainNode">主节点</param>
/// <param name="Element">元素</param>
/// <param name="Content">元素内容</param>
public void InsertElement(string MainNode, string Element, string Content)
{
//插入一个节点,不带属性。
XmlNode objNode = objXmlDoc.SelectSingleNode(MainNode);
XmlElement objElement = objXmlDoc.CreateElement(Element);
objElement.InnerText = Content;
objNode.AppendChild(objElement);
} /// <summary>
/// 对xml文件做插入,更新,删除后需做Save()操作,以保存修改
/// </summary>
public void Save()
{
//保存文檔。
try
{
objXmlDoc.Save(strXmlFile);
}
catch (System.Exception ex)
{
throw ex;
}
objXmlDoc = null;
}
} //========================================================= //实例应用: //string strXmlFile = Server.MapPath("TestXml.xml");
//XmlControl xmlTool = new XmlControl(strXmlFile); // 数据显视
// dgList.DataSource = xmlTool.GetData("Book/Authors[ISBN=\"0002\"]");
// dgList.DataBind(); // 更新元素内容
// xmlTool.Replace("Book/Authors[ISBN=\"0002\"]/Content","ppppppp");
// xmlTool.Save(); // 添加一个新节点
// xmlTool.InsertNode("Book","Author","ISBN","0004");
// xmlTool.InsertElement("Book/Author[ISBN=\"0004\"]","Content","aaaaaaaaa");
// xmlTool.InsertElement("Book/Author[ISBN=\"0004\"]","Title","Sex","man","iiiiiiii");
// xmlTool.Save(); // 删除一个指定节点的所有内容和属性
// xmlTool.Delete("Book/Author[ISBN=\"0004\"]");
// xmlTool.Save(); // 删除一个指定节点的子节点
// xmlTool.Delete("Book/Authors[ISBN=\"0003\"]");
// xmlTool.Save();