FreeSql, is the ORM in .NET Core, .NET Framework and Xamarin. It supports MySQL, PostgreSQL, SqlServer, Oracle, Sqlite, Odbc, 达梦, And MsAccess.

Programming language: C#
License: MIT License
Tags: Linq     ORM     Database     SqlServer     MySQL     SQLite     PostgreSQL    
Latest version: v2.0.105

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🦄 FreeSql

FreeSql is a powerful O/RM component, supports .NET Core 2.1+, .NET Framework 4.0+, and Xamarin.

Member project of .NET Core Community nuget stats GitHub license

English |

  • 🛠 Support CodeFirst data migration.
  • 💻 Support DbFirst import entity class from database, or use Generation Tool.
  • ⛳ Support advanced type mapping, such as PostgreSQL array type, etc.
  • 🌲 Support expression functions, and customizable analysis.
  • 🏁 Support one-to-many and many-to-many navigation properties, include and lazy loading.
  • 📃 Support Read/Write separation, Splitting Table/Database, Global filters, Optimistic and pessimistic locker.
  • 🌳 Support MySql/SqlServer/PostgreSQL/Oracle/Sqlite/Firebird/达梦/人大金仓/神舟通用/南大通用/翰高/ClickHouse/MsAccess, etc.

QQ Groups:4336577(full)、8578575(full)、52508226(available)

📚 Documentation

Get started  \
Expression  \
Repository  \
Read/Write  \

Please select a development mode:

Some open source projects that use FreeSql:

🚀 Quick start

dotnet add package FreeSql.Provider.Sqlite

static IFreeSql fsql = new FreeSql.FreeSqlBuilder()
  .UseConnectionString(FreeSql.DataType.Sqlite, @"Data Source=document.db")
  .UseAutoSyncStructure(true) //automatically synchronize the entity structure to the database
  .Build(); //be sure to define as singleton mode

class Song {
  [Column(IsIdentity = true)]
  public int Id { get; set; }
  public string Title { get; set; }
  public string Url { get; set; }
  public DateTime CreateTime { get; set; }

  public ICollection<Tag> Tags { get; set; }
class Song_tag {
  public int Song_id { get; set; }
  public Song Song { get; set; }

  public int Tag_id { get; set; }
  public Tag Tag { get; set; }
class Tag {
  [Column(IsIdentity = true)]
  public int Id { get; set; }
  public string Name { get; set; }

  public int? Parent_id { get; set; }
  public Tag Parent { get; set; }

  public ICollection<Song> Songs { get; set; }
  public ICollection<Tag> Tags { get; set; }

🔎 Query

fsql.Select<Tag>().Where(a => a.Parent.Parent.Name == "English").ToList();

fsql.Select<Tag>().IncludeMany(a => a.Tags, then => then.Where(sub => sub.Name == "foo")).ToList();

  .IncludeMany(a => a.Tags, then => then.Where(sub => sub.Name == "foo"))
  .Where(s => s.Tags.AsSelect().Any(t => t.Name == "Chinese"))

  .Where(a => a.IsDelete == 0)
  .WhereIf(keyword != null, a => a.UserName.Contains(keyword))
  .WhereIf(role_id > 0, a => a.RoleId == role_id)
  .Where(a => a.Nodes.AsSelect().Any(t => t.Parent.Id == t.UserId))
  .Count(out var total)
  .Page(page, size)
  .OrderByDescending(a => a.Id)


fsql.Select<Song>().Where(a => new[] { 1, 2, 3 }.Contains(a.Id)).ToList();

fsql.Select<Song>().Where(a => a.CreateTime.Date == DateTime.Today).ToList();

fsql.Select<Song>().OrderBy(a => Guid.NewGuid()).Limit(10).ToList();


🚁 Repository

dotnet add package FreeSql.Repository

public void Add() {
  var repo = ioc.GetService<BaseRepository<Tag>>();
  repo.DbContextOptions.EnableAddOrUpdateNavigateList = true;

  var item = new Tag {
    Name = "testaddsublist",
    Tags = new[] {
      new Tag { Name = "sub1" },
      new Tag { Name = "sub2" }

Reference: Use TransactionalAttribute and UnitOfWorkManager in ASP.NET Core to Achieve the Multiple Transaction Propagation.

💪 Performance

FreeSql Query & Dapper Query

Elapsed: 00:00:00.6733199; Query Entity Counts: 131072; ORM: Dapper

Elapsed: 00:00:00.4554230; Query Tuple Counts: 131072; ORM: Dapper

Elapsed: 00:00:00.6846146; Query Dynamic Counts: 131072; ORM: Dapper

Elapsed: 00:00:00.6818111; Query Entity Counts: 131072; ORM: FreeSql*

Elapsed: 00:00:00.6060042; Query Tuple Counts: 131072; ORM: FreeSql*

Elapsed: 00:00:00.4211323; Query ToList<Tuple> Counts: 131072; ORM: FreeSql*

Elapsed: 00:00:01.0236285; Query Dynamic Counts: 131072; ORM: FreeSql*

FreeSql ToList & Dapper Query

Elapsed: 00:00:00.6707125; ToList Entity Counts: 131072; ORM: FreeSql*

Elapsed: 00:00:00.6495301; Query Entity Counts: 131072; ORM: Dapper


👯 Contributors

And other friends who made important suggestions for this project, they include:

systemhejiyong, LambertW, mypeng1985, stulzq, movingsam, ALer-R, zouql, 深圳|凉茶, densen2014, LiaoLiaoWuJu, hd2y, tky753, feijie999, constantine, JohnZhou2020, mafeng8, etc.

💕 Donation

L*y 58元、花花 88元、麦兜很乖 50元、网络来者 2000元、John 99.99元、alex 666元、bacongao 36元、无名 100元、Eternity 188元、无名 10元、⌒.Helper~..oO 66元、习惯与被习惯 100元、无名 100元、蔡易喋 88.88元、中讯科技 1000元、Good Good Work 24元、炽焰 6.6元、Nothing 100元、兰州天擎赵 500元、哈利路亚 300元、 无名 100元、蛰伏 99.99元、TCYM 66.66元、MOTA 5元、LDZXG 30元、Near 30元、建爽 66元、无名 200元、LambertWu 100元、无名 18.88元、乌龙 50元、无名 100元、陳怼怼 66.66元、陳怼怼 66.66元、丁淮 100元、李伟坚-Excel催化剂 100元、白狐 6.66元、她微笑的脸y 30元、Eternity²º²¹ 588元、夜归柴门 88元、蔡易喋 666.66元、 礼 10元、litrpa 88元、Alax CHOW 200元、Daily 66元、k*t 66元、蓝 100元、菜 10元、生命如歌 1000元

Thank you for your donation

🗄 License


*Note that all licence references and agreements mentioned in the FreeSql README section above are relevant to that project's source code only.