using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml.Linq;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
#region;
//string[] names = { "Burke", "Connor", "Frank", "Everett", "Albert", "George", "Harris", "David" };
//IEnumerable<string> expr = from s in names
// where s.Length == 5
// orderby s
// select s.ToUpper();
//foreach (string item in expr)
//{
// this.listView1.Items.Add(item);
//}
//Func<int, int, int> add = (int x, int y) => x * y;
//Console.WriteLine(add(6, 4));
//Console.ReadKey();
//Func<int, int, int> add1 = (z, k) => z * k;
//Console.WriteLine(add1(2, 4));
//Console.ReadKey();
//隐含类型的输入参数
//X => X + 1;
//X=>{return X+1}
//costomer=>customer.Name
//(x,y)=>x*y//多个参数
//(person,minAge)=>person.Age=>mingAge
//显示类型的输入参数
//(int x)=>x+1
//(int x)=>{return x+1}
//无参数类型
//（）=>1
//()=>Console.WriteLine()
//显示转化为隐式
//(int x, int y) => x * y;
//(x, y) => x * y;
// =>左边为参数，右边为表达式
#endregion;
#region;
//var words = new string[] { "中国", "英国", "法国", "中国人" };
//IEnumerable<string> hasDAndE =
// from s in words
// where s.Contains('中') && s.Contains('国')
// select s.Trim();
//var words = new string[] { "中国", "英国", "法国", "中国人" };
//IEnumerable<string> hasDAndE =
//words.Where(s => s.Contains('中') && s.Contains('国'));
//foreach (string s in hasDAndE)
//{
// Console.WriteLine(s);
//}
//结果为:中国人，中国
//排序
//IEnumerable<int> orderde = numbers.OrderBy(n => n);
//foreach (var item in orderde)
//{
// Console.WriteLine(item);
//}
//string findword = "机";
//var words = new string[] { "电视机", "电冰箱", "手机" };
//var matches = words.Select(s => s.Contains(findword));
//foreach (var str in matches)
//{
// Console.WriteLine(str);
//}
//结果true false true
//string findword = "机";
//var words = new string[] { "电视机", "电冰箱", "手机" };
//var matches = words.Where(s => s.Contains(findword));
//foreach (var str in matches)
//{
// Console.WriteLine(str);
//}
#endregion;
#region;
//结果:电视机 手机
// var recipes = new[] {
// "Crepes Florentine", "Shrimp Che Paul",
//"Beef Burgundy", "Rack of Lamb",
//"Tacos", "Rosemary Roasted Chicken",
//"Juevos Rancheros", "Buffalo Chicken Nachos"};
// var results = recipes.Where(s => s.Contains("Chicken"));
// Array.ForEach<string>(results.ToArray<string>(),
// s => Console.WriteLine(s));
//((string)item.Attribute("ParNumber"))
//XElement xelement = XElement.Load(@"C:\Users\mengqingbo\Desktop\linq\WindowsFormsApplication1\ConsoleApplication1\XMLFile1.xml");
//IEnumerable<string> partNos =
// from item in xelement.Descendants("book")
// select (string)item.Attribute("type").Value;
//foreach (string str in partNos)
//{
// Console.WriteLine(str.ToString());
//}
//XElement contacts = new XElement("Contacts",
//new XElement("Name", "lce Lee"),
//new XElement("Phone", "010-87654632", new XAttribute("Type", "Home")),
//new XElement("Address", new XElement("Street", "ZhiXinCun"), new XElement("City", "BeiJing"))
// );
//Console.WriteLine(contacts);
//添加节点
//string xmlPath = @"C:\Users\mengqingbo\Desktop\linq\WindowsFormsApplication1\ConsoleApplication1\XMLFile1.xml";
//XElement xelement = XElement.Load(xmlPath);
//XElement newxelement = new XElement("New", "这是新的节点");
//Console.WriteLine(xelement);
//xelement.Add(newxelement);
//Console.WriteLine(xelement);
////保存一下
//xelement.Save(xmlPath);
#endregion;
//MyAnnotation ma = new MyAnnotation("T1");
//XElement root = new XElement("Root", "content");
//root.AddAnnotation(ma);
//删除节点
//string xmlPath = @"C:\Users\mengqingbo\Desktop\linq\WindowsFormsApplication1\ConsoleApplication1\XMLFile1.xml";
//XElement xelement = XElement.Load(xmlPath);
//var poNode = from item in xelement.Descendants("new")
// select item;
//poNode.Remove();
////保存一下
//xelement.Save(xmlPath);
//Console.WriteLine(xelement);
#region;
////更新节点
////查找目标树节点的父节点
////将先前的节点的孩子转移到新节点
////将节点的子节点替换 ReplaceWith:操作本元素
////ReplaceNodes ReplaceAttributes ReplaceAll 操作元素的孩子或是属性的内容
//XElement xel = XElement.Load(@"C:\Users\mengqingbo\Desktop\linq\WindowsFormsApplication1\ConsoleApplication1\XMLFile1.xml");
//var itemNodes = from item in xel.Descendants("New")
// select item;
//int n = itemNodes.Count();
//for (int i = 0; i < n; i++)
//{
// //新创建节点
// XElement nel = new XElement("Element");
// //转移子节点
// nel.Add(itemNodes.ElementAt(0).Elements());
// //替换
// itemNodes.ElementAt(0).ReplaceWith(nel);
//}
//Console.WriteLine(xel);
#endregion;
Console.ReadKey();
}
}
}
xml:
<?xml version="1.0" encoding="utf-8"?>
<BookList>
<book name="english" type="edu">
<author>zhangweia</author>
<price>10</price>
</book>
<book name="math" type="edu">
<author>zhangweib</author>
<price>20</price>
</book>
<book name="math1" type="edu">
<author>zhangweib</author>
<price>30</price>
</book>
<book name="math2" type="rw">
<author>zhangweib</author>
<price>40</price>
</book>
<book name="math3" type="rw">
<author>zhangweib</author>
<price>50</price>
</book>
<book name="math4" type="rw">
<author>zhangweib</author>
<price>60</price>
</book>
<New>
这是新的节点
<meng>hao</meng>
<qing>ee</qing>
</New>
</BookList> |
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