1、安装SQLite

在 nuget 搜索 System.Data.SQLite 安装

2、在 app.conifg 文件中添加如下信息

 <provider invariantName="System.Data.SQLite" type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6" />

解决问题：

No Entity Framework provider found for the ADO.NET provider with invariant name ‘System.Data.SQLite’. Make sure the provider is registered in the ‘entityFramework’ section of the application config file. See http://go.microsoft.com/fwlink/?LinkId=260882 for more information.”

完整的 app.config 文件

<?xml version="1.0" encoding="utf-8"?>
<configuration><configSections><!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 --><section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" /></configSections><startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.8" /></startup><runtime><assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"><dependentAssembly><assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed" culture="neutral" /><bindingRedirect oldVersion="0.0.0.0-13.0.0.0" newVersion="13.0.0.0" /></dependentAssembly></assemblyBinding></runtime><entityFramework><providers><provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" /><provider invariantName="System.Data.SQLite.EF6" type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6" /><provider invariantName="System.Data.SQLite" type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6" /></providers></entityFramework><system.data><DbProviderFactories><remove invariant="System.Data.SQLite.EF6" /><add name="SQLite Data Provider (Entity Framework 6)" invariant="System.Data.SQLite.EF6" description=".NET Framework Data Provider for SQLite (Entity Framework 6)" type="System.Data.SQLite.EF6.SQLiteProviderFactory, System.Data.SQLite.EF6" /><remove invariant="System.Data.SQLite" /><add name="SQLite Data Provider" invariant="System.Data.SQLite" description=".NET Framework Data Provider for SQLite" type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite" /></DbProviderFactories></system.data>
</configuration>

3、创建 SQLiteContext.cs 文件

using System.Data.Entity;
using System.Data.SQLite;namespace dbz_desktop_ser.db
{public class SQLiteContext : DbContext{public SQLiteConnection DbConnection { get; set; }public DbSet<NetbarInfo> NetbarInfo { get; set; }public SQLiteContext(string connectionString) : base(new SQLiteConnection() { ConnectionString = $@"URI=file:{connectionString}" }, true){DbConnection = (SQLiteConnection)base.Database.Connection;}}
}

4、创建 NetbarInfo.CS 文件 （数据模型）

using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;namespace dbz_desktop_ser.dbModel
{[Table("NetbarInfo")]public class NetbarInfo{[Key]public int id { get; set; }[Column("name")]public string Name { get; set; }}
}

5、创建 NetbarInfoHelper.cs 文件 （增删改查）

using dbz_desktop_ser.dbModel;
using System.Linq;namespace dbz_desktop_ser.db
{public class NetbarInfoHelper{private readonly SQLiteContext _context;public NetbarInfoHelper(string connectionString){_context = new SQLiteContext(connectionString);}// 查询门店信息  public IQueryable<NetbarInfo> GetNetbarInfo(){return _context.NetbarInfo;}}
}

6、调用

using dbz_desktop_ser.db;
using System;
using System.Windows.Forms;namespace dbz_desktop_ser.WinForm
{public partial class FrmMain : Form{public FrmMain(){InitializeComponent();}private void FrmMain_Load(object sender, EventArgs e){var db = new NetbarInfoHelper("myConfig.db");var info = db.GetNetbarInfo();foreach (var item in info){Console.WriteLine($"id：{item.id} 名称：{item.Name}");}}}
}