如何使用EF框架操作Sqlite

1.下载相关的NuGet

2.创建如下的项目结构

3.创建AppDbContext类

cs 复制代码

using Microsoft.EntityFrameworkCore;
using SaveSyetemConfiguration.Model;
using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SaveSyetemConfiguration.DBContext
{
    public class AppDbContext : Microsoft.EntityFrameworkCore.DbContext
    {
        // 数据库连接字符串（动态创建时可通过参数传入）
        private readonly string _connectionString;

        // 构造函数接收连接字符串（支持动态配置）
        public AppDbContext(string connectionString)
        {
            _connectionString = connectionString;
        }

        // 实体集（对应数据库表）
        public Microsoft.EntityFrameworkCore.DbSet<PerSon> PersonData { get; set; } = null;

        // 重写 OnConfiguring 配置数据库选项
        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            if (!optionsBuilder.IsConfigured)
            {
                optionsBuilder.UseSqlite(_connectionString); // 使用 SQLite 提供程序
            }
        }
    }
}

4.创建对应的Model类

cs 复制代码

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 SaveSyetemConfiguration.Model
{
    public class PerSon
    {
        [Key]
        [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
        public long ID { get; set; }
        public string Name { get; set; }
        public int Age { get; set; }


    }
}

5.在程序类进行简单的操作

cs 复制代码

using SaveSyetemConfiguration.DBContext;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SaveSyetemConfiguration
{
    internal class Program
    {
        static void Main(string[] args)
        {
            string DbPath = @"D:\NowText";
            string connectionString = "通道1";
            try
            {
                Directory.CreateDirectory(DbPath);
                connectionString = $"Data Source={DbPath}\\{connectionString}.db";
                AppDbContext Db = new AppDbContext(connectionString);
                Db.Database.EnsureCreated();

                Db.PersonData.Add(new Model.PerSon()
                {
                    Age = 1,
                    Name = "张三"
                });
                Db.PersonData.Add(new Model.PerSon()
                {
                    Age = 1,
                    Name = "李四"
                });
                var count = Db.SaveChanges();
            }
            catch (Exception)
            {
               
            }


        }


       


    }

}

结果如下：