C#基于Linq和反射实现数据持久化框架Xml4DB详解

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Linq;
using Xml4DB;
 
namespace Xml4DB.Sample
{
  class Program
  {
    static void Main(string[] args)
    {
      //以覆盖方式创建XmlDB
      XmlDB mDB = XmlDBFactory.CreatXmlDB("XmlDB示例程序","D:\\XmlDB演示程序\\Sample.xml",1);
      //创建Student对象李逍遥
      Student mStudent = new Student(1, "李逍遥", 18);
      //插入Student对象李逍遥
      mDB.Insert(mStudent);
      //创建Student对象酒剑仙
      mStudent = new Student(2, "酒剑仙", 37);
      //插入Student对象酒剑仙
      mDB.Insert(mStudent);
      //创建Student对象赵灵儿
      mStudent = new Student(3, "赵灵儿", 17);
      //插入Student对象赵灵儿
      mDB.Insert(mStudent);
      //创建Student对象慕容紫英
      mStudent = new Student(4, "慕容紫英", 20);
      //插入Student对象慕容紫英
      mDB.Insert(mStudent);
      //提交修改
      mDB.Commit();
 
      //查询姓名为李逍遥的Student对象
      List<Student> objects = mDB.Read(new Student(0, "李逍遥", 0));
      //输出查询结果
      Console.WriteLine(objects[0].ToString());
 
      //将姓名为酒剑仙的对象中的姓名改为司徒钟,年龄改为40
      mDB.Update(new Student(0, "酒剑仙", 0), new Student(0, "司徒钟", 40));
      //删除ID为3的对象记录
      mDB.Delete(new Student(3, null, 0));
      mDB.Commit();
 
      //读取全部的Student记录
      objects = mDB.Read(new Student());
      foreach (Student obj in objects)
      {
        Console.WriteLine(obj.ToString());
      }
 
      //等待以便观察结果
      Console.ReadKey();
    }
 
    /// <summary>
    /// XmlDB演示类
    /// </summary>
    public class Student
    {
      public Student()
      {
 
      }
 
      public Student(int mID,string mName,int mAge)
      {
        this.mID = mID;
        this.mName = mName;
        this.mAge=mAge;
      }
 
      private int mAge;
      public int Age
      {
        get { return mAge; }
        set { mAge = value; }
      }
 
      private int mID;
      public int ID
      {
        get { return mID; }
        set { mID = value; }
      }
 
      private string mName;
      public string Name
      {
        get { return mName; }
        set { mName = value; }
      }
 
      public override string ToString()
      {
        return string.Format("ID={0},Name={1},Age={2}", this.ID, this.Name,this.Age);
      }
    }
  }
}

<?xml version="1.0" encoding="utf-8"?>
<XmlDB DBName="XmlDB示例程序" DBVersion="1">
 <Student>
  <Age>18</Age>
  <ID>1</ID>
  <Name>李逍遥</Name>
 </Student>
 <Student>
  <Age>37</Age>
  <ID>2</ID>
  <Name>酒剑仙</Name>
 </Student>
 <Student>
  <Age>17</Age>
  <ID>3</ID>
  <Name>赵灵儿</Name>
 </Student>
 <Student>
  <Age>20</Age>
  <ID>4</ID>
  <Name>慕容紫英</Name>
 </Student>
</XmlDB>