NET Core to add Sqlite database

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SQLite installation

Environmental description

• Visual Studio 2022
• .NET Core 6.0

Nuget installation

• Microsoft.EntityFrameworkCore.Sqlite
• Microsoft.EntityFrameworkCore.Sqlite.Core
• Newtonsoft.Json
  

test program

ORMContext

using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SqliteTest2.DB
{
    
    
//继承DbContext，让EF接管
    public class ORMContext : DbContext
    {
    
    
        public DbSet<Student> Students {
    
     get; set; }

		
        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
    
    
        	//数据库连接字符串
            optionsBuilder.UseSqlite("Data Source=blogging.db");
        }

    }
	//测试类
    public class Student
    {
    
    
    	
        [Key]//主键
        [DatabaseGenerated(DatabaseGeneratedOption.Identity)]//自动递增
        public int Id {
    
     get; set; }

        public string Name {
    
     get; set; }

        public int Age {
    
     get; set; }

        public string Sex {
    
     get; set; }
    }
}

Program.cs

// See https://aka.ms/new-console-template for more information


using Newtonsoft.Json;
using SqliteTest2.DB;

ORMContext _ORMContext = new ORMContext();
//如果没有数据库，则自动创建
_ORMContext.Database.EnsureCreated();

for(var i = 0;i < 10; i++)
{
    
    
    _ORMContext.Students.Add(new Student()
    {
    
    
        Name = "Laly" + i,
        Age = i,
        Sex = "女"
    });
}
//保存数据库更新
_ORMContext.SaveChanges();

//打印数据
var res = _ORMContext.Students.Where(t => t.Sex == "女").ToList();

Console.WriteLine(JsonConvert.SerializeObject(res));



Console.WriteLine("Hello, World!");

Test Results

end

Sqlite3 is a particularly good local database with small size and no installation required. It is the best database for writing small console programs. NET Core is the future direction of .NET, and I plan to slowly migrate the technology stack there recently.