这篇文章主要介绍了c#实现xml文档的增删改查功能,结合实例形式分析了xml文档的创建及c#针对xml文档的加载及增删改查等操作技巧,需要的朋友可以参考下
本文实例讲述了C#实现XML文档的增删改查功能。分享给大家供大家参考，具体如下：
1、 创建实例XML文件（Books.xml）
Everyday Italian Giada De Laurentiis 2005 30.00 Harry Potter J K. Rowling 2005 29.99 XQuery Kick Start James McGovern Per Bothner Kurt Cagle James Linn Vaidyanathan Nagarajan 2003 49.99 Learning XML Erik T. Ray 2003 39.95
2、 创建图书信息实体类（BookInfo.cs）
public class BookInfo
{
///
/// 图书ID
///
public int BookId { set; get; }
///
/// 图书名称
///
public string Title { set; get; }
///
/// 图书分类
///
public string Category { set; get; }
///
/// 图书语言
///
public string Language { set; get; }
///
/// 图书作者
///
public string Author { set; get; }
///
/// 出版时间
///
public string Year { set; get; }
///
/// 销售价格
///
public decimal Price { set; get; }
}3、 创建图书信息业务逻辑类（BookInfoBLL.cs）
using System.Xml; //引用相关文件
public class BookInfoBLL
{
private string _basePath = AppDomain.CurrentDomain.SetupInformation.ApplicationBase + @"/xml/Books.xml"; //XML文件路径
private XmlDocument _booksXmlDoc = null; //创建XML文档对象
public BookInfoBLL()
{
try
{
_booksXmlDoc = new XmlDocument(); //初始化XML文档对象
_booksXmlDoc.Load(_basePath); //加载指定的XML文档
}
catch (Exception ex)
{
throw new Exception("加载XML文档出错：" + ex.Message);
}
}
///
/// 获取图书列表(查)
///
/// 参数条件
/// 图书列表
public List GetBookInfoList(BookInfo param)
{
List bookInfoList = new List();
string xPath = "bookstore/book"; //默认获取所有图书
if (param.BookId != 0) //根据图书ID查询
{
xPath = String.Format("/bookstore/book[@id='{0}']", param.BookId);
}
else if (!String.IsNullOrEmpty(param.Category)) //根据图书类别查询
{
xPath = String.Format("/bookstore/book[@category='{0}']", param.Category);
}
else if (!String.IsNullOrEmpty(param.Title)) //根据图书名称查询
{
xPath = String.Format("/bookstore/book[title='{0}']", param.Title);
}
XmlNodeList booksXmlNodeList = _booksXmlDoc.SelectNodes(xPath);
foreach (XmlNode bookNode in booksXmlNodeList)
{
BookInfo bookInfo = new BookInfo();
bookInfo.BookId = Convert.ToInt32(bookNode.Attributes["id"].Value); //获取属性值
bookInfo.Category = bookNode.Attributes["category"].Value;
bookInfo.Language = bookNode.SelectSingleNode("title").Attributes["lang"].Value; //获取子节点的属性值
bookInfo.Title = bookNode.SelectSingleNode("title").InnerText; //获取元素值
bookInfo.Author = bookNode.SelectSingleNode("author").InnerText;
bookInfo.Year = bookNode.SelectSingleNode("year").InnerText;
bookInfo.Price = Convert.ToDecimal(bookNode.SelectSingleNode("price").InnerText);
bookInfoList.Add(bookInfo);
}
return bookInfoList;
}
///
/// 增加图书信息（增）
///
///
///
//创建节点
XmlElement bookXmlElement = _booksXmlDoc.CreateElement("book");
XmlElement titleXmlElement = _booksXmlDoc.CreateElement("title");
XmlElement authorXmlElement = _booksXmlDoc.CreateElement("author");
XmlElement yearXmlElement = _booksXmlDoc.CreateElement("year");
XmlElement priceXmlElement = _booksXmlDoc.CreateElement("price");
//给节点赋值
bookXmlElement.SetAttribute("id", param.BookId.ToString());
bookXmlElement.SetAttribute("category", param.Category);
titleXmlElement.InnerText = param.Title; //给节点添加元素值
titleXmlElement.SetAttribute("lang", param.Language);//给节点添加属性值
authorXmlElement.InnerText = param.Author;
yearXmlElement.InnerText = param.Year;
priceXmlElement.InnerText = param.Price.ToString();
//AppendChild 将指定的节点添加到该节点的子节点列表的末尾
bookXmlElement.AppendChild(titleXmlElement);
bookXmlElement.AppendChild(authorXmlElement);
bookXmlElement.AppendChild(yearXmlElement);
bookXmlElement.AppendChild(priceXmlElement);
root.AppendChild(bookXmlElement);
_booksXmlDoc.Save(_basePath);
result = true;
return result;
}
///
/// 修改图书信息（改）
///
///
///
/// 删除图书信息（删）
///
///
/// 
