标签:xml string 改查 Value xe item private linq new
xml文件
<?xml version="1.0" encoding="utf-8"?> <bookstore> <!--记录书本的信息--> <book Type="必修课" ISBN="7-111-19149-2"> <title>数据结构</title> <author>严蔚敏</author> <price>30.00</price> </book> <book Type="必修课" ISBN="7-111-19149-3"> <title>路由型与交换型互联网基础</title> <author>程庆梅</author> <price>27.00</price> </book> <book Type="选修课" ISBN="7-111-19149-1"> <title>计算机操作系统</title> <author>张文明</author> <price>28</price> </book> </bookstore>
加载
string path = @"C:\Users\asus\Desktop\test.xml"; XElement xe; public MainWindow() { InitializeComponent(); xe= XElement.Load(path); }
自定义一个类
public class BookModel { public BookModel() { } /// <summary> /// 所对应的课程类型 /// </summary> private string bookType; public string BookType { get { return bookType; } set { bookType = value; } } /// <summary> /// 书所对应的ISBN号 /// </summary> private string bookISBN; public string BookISBN { get { return bookISBN; } set { bookISBN = value; } } /// <summary> /// 书名 /// </summary> private string bookName; public string BookName { get { return bookName; } set { bookName = value; } } /// <summary> /// 作者 /// </summary> private string bookAuthor; public string BookAuthor { get { return bookAuthor; } set { bookAuthor = value; } } /// <summary> /// 价格 /// </summary> private double bookPrice; public double BookPrice { get { return bookPrice; } set { bookPrice = value; } } }
增
private void Button_Click(object sender, RoutedEventArgs e) { XElement record = new XElement( new XElement("book", new XAttribute("Type", "选修课"), new XAttribute("ISBN", "7-111-19149-1"), new XElement("title", "计算机操作系统"), new XElement("author", "张文明"), new XElement("price", 28.00))); xe.Add(record); xe.Save(path); }
删
private void Button_Click_1(object sender, RoutedEventArgs e) { foreach (var item in xe.Elements("book").Where(x => x.Attribute("ISBN").Value== "7-111-19149-1").ToList()) { item.Remove(); } xe.Save(path); }
改
private void Button_Click_2(object sender, RoutedEventArgs e) { foreach (var item in xe.Elements("book").Where(x => x.Attribute("ISBN").Value == "7-111-19149-1").ToList()) { item.Element("title").Value = "test"; } xe.Save(path); }
查
private void Button_Click_3(object sender, RoutedEventArgs e) { List<BookModel> bookModelList = new List<BookModel>(); foreach (var item in xe.Elements("book").Where(x => x.Attribute("ISBN").Value == "7-111-19149-1").ToList()) { BookModel bookModel = new BookModel(); bookModel.BookType = item.Attribute("Type").Value; bookModel.BookISBN = item.Attribute("ISBN").Value; bookModel.BookName = item.Element("title").Value; bookModel.BookPrice =Convert.ToDouble( item.Element("price").Value); bookModel.BookAuthor = item.Element("author").Value; bookModelList.Add(bookModel); } dg1.ItemsSource = bookModelList; }
标签:xml,string,改查,Value,xe,item,private,linq,new 来源: https://www.cnblogs.com/dangnianxiaoqingxin/p/13180853.html
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