Newcats.DataAccess.MySql 1.2.5

There is a newer version of this package available.
See the version list below for details.
dotnet add package Newcats.DataAccess.MySql --version 1.2.5                
NuGet\Install-Package Newcats.DataAccess.MySql -Version 1.2.5                
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="Newcats.DataAccess.MySql" Version="1.2.5" />                
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Newcats.DataAccess.MySql --version 1.2.5                
#r "nuget: Newcats.DataAccess.MySql, 1.2.5"                
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install Newcats.DataAccess.MySql as a Cake Addin
#addin nuget:?package=Newcats.DataAccess.MySql&version=1.2.5

// Install Newcats.DataAccess.MySql as a Cake Tool
#tool nuget:?package=Newcats.DataAccess.MySql&version=1.2.5                

Newcats.DataAccess.MySql 使用说明

Net Core Nuget GitHub License

示例代码:

  • 注:此处只展示同步方法示例,异步方法同理
//1.插入数据,返回主键
object r1 = _repository.Insert<UserInfo>(new UserInfo { Name = "Newcats", CreateTime = DateTime.Now });

//2.插入数据,返回是否成功
bool r2 = _repository.Insert<UserInfo>(new UserInfo { Id = 1, Name = "Huang", CreateTime = DateTime.UtcNow }, null);

//3.批量插入,返回成功的条数
int r3 = _repository.InsertBulk<UserInfo>(new List<UserInfo>() { new UserInfo { Name = "Newcats", CreateTime = DateTime.Now } }, transaction, 600);

//4.使用SqlBulkCopy批量插入数据
int r4 = _repository.InsertSqlBulkCopy<UserInfo>(new List<UserInfo>() { new UserInfo { Name = "Newcats", CreateTime = DateTime.Now } }, transaction, 600);

//5.根据主键删除一条数据(delete from userinfo where id=1;)
int r5 = _repository.Delete<UserInfo>(1);

//6.根据给定的条件,删除记录(删除CreateTime>=2021-12-12的记录)(delete from userinfo where createtime>='2021-12-12';)
int r6 = _repository.Delete<UserInfo>(new List<DbWhere<UserInfo>> { new DbWhere<UserInfo>(s => s.CreateTime, new DateTime(2021, 12, 12), OperateTypeEnum.GreaterEqual, LogicTypeEnum.And) });

//7.根据主键,更新一条记录(update userinfo set Name='NewcatsHuang' where id=2;)
int r7 = _repository.Update<UserInfo>(2, new List<DbUpdate<UserInfo>>() { new DbUpdate<UserInfo>(s => s.Name, "NewcatsHuang") }, transaction, 60);

//8.根据给定的条件,更新记录(update userinfo set Name='Newcats',CreateTime='2021-12-31' where CreateTime>='2021-12-12' and CreateTime<'2021-12-30';)
int r8 = _repository.Update<UserInfo>(
                new List<DbWhere<UserInfo>>
                {
                    new DbWhere<UserInfo>(s => s.CreateTime, new DateTime(2021, 12, 12), OperateTypeEnum.GreaterEqual, LogicTypeEnum.And),
                    new DbWhere<UserInfo>(s=>s.CreateTime,new DateTime(2021,12,30), OperateTypeEnum.Less, LogicTypeEnum.And)
                },
                new List<DbUpdate<UserInfo>>
                {
                    new DbUpdate<UserInfo>(s => s.Name,"Newcats"),
                    new DbUpdate<UserInfo>(s=>s.CreateTime,new DateTime(2021,12,31))
                });

//9.根据主键,获取一条记录(select * from userinfo where id=1;)
UserInfo r9 = _repository.Get<UserInfo>(1);

//10.根据给定条件,获取一条记录(select top 1 * from userinfo where Name='Newcats' order by CreateTime desc;)
UserInfo r10 = _repository.Get<UserInfo>(new List<DbWhere<UserInfo>>
{
    new DbWhere<UserInfo> (s=>s.Name,"Newcats", OperateTypeEnum.Equal, LogicTypeEnum.And)
}, null, null, new DbOrderBy<UserInfo>(s => s.CreateTime, SortTypeEnum.DESC));

//11.根据给定的条件及排序,分页获取数据(获取Name包含'newcats'字符串的第2页的20条数据)
(IEnumerable<UserInfo> list, int totalCount) r11 = _repository.GetPage<UserInfo>(1, 20, new List<DbWhere<UserInfo>> { new DbWhere<UserInfo>(s => s.Name, "newcats", OperateTypeEnum.Like, LogicTypeEnum.And) });

//12.分页获取数据,逻辑同上
var p = new PageInfo<UserInfo>(1, 20);
p.Where = new List<DbWhere<UserInfo>> { new DbWhere<UserInfo>(s => s.Name, "newcats", OperateTypeEnum.Like, LogicTypeEnum.And) };
(IEnumerable<UserInfo> list, int totalCount) r12 = _repository.GetPage<UserInfo>(p);

//13.根据给定的条件及排序,分页获取数据,逻辑同上
PageInfo<UserInfo> r13 = _repository.GetPageInfo<UserInfo>(1, 20, new List<DbWhere<UserInfo>> { new DbWhere<UserInfo>(s => s.Name, "newcats", OperateTypeEnum.Like, LogicTypeEnum.And) });

//14.根据给定的条件及排序,分页获取数据,逻辑同上
PageInfo<UserInfo> r14 = _repository.GetPageInfo<UserInfo>(p);

//15.获取所有数据
IEnumerable<UserInfo> r15 = _repository.GetAll<UserInfo>();

//16.根据给定的条件及排序,获取所有数据(获取Name包含'newcats'字符串的所有数据)
IEnumerable<UserInfo> r16 = _repository.GetAll<UserInfo>(new List<DbWhere<UserInfo>> { new DbWhere<UserInfo>(s => s.Name, "newcats", OperateTypeEnum.Like, LogicTypeEnum.And) });

//17.根据默认排序,获取指定数量的数据(select top 10 * from userinfo;)
IEnumerable<UserInfo> r17 = _repository.GetTop<UserInfo>(10);

//18.根据给定的条件及排序,获取指定数量的数据(select top 10 * from userinfo where Name like '%newcats%' order by Id;)
IEnumerable<UserInfo> r18 = _repository.GetTop<UserInfo>(10, new List<DbWhere<UserInfo>> { new DbWhere<UserInfo>(s => s.Name, "newcats", OperateTypeEnum.Like, LogicTypeEnum.And) }, null, null, new DbOrderBy<UserInfo>(s => sId, SortTypeEnum.ASC));

//19.获取记录总数量(select count(1) from userinfo;)
int r19 = _repository.Count<UserInfo>();

//20.根据给定的条件,获取记录数量(select count(1) from userinfo where Name like '%newcats%')
int r20 = _repository.Count<UserInfo>(new List<DbWhere<UserInfo>> { new DbWhere<UserInfo>(s => s.Name, "newcats", OperateTypeEnum.Like, LogicTypeEnum.And) });

//21.根据主键,判断数据是否存在(select top 1 1 from userinfo where Id=2021;=>r==1?)
bool r21 = _repository.Exists<UserInfo>(2021);

//22.根据给定的条件,判断数据是否存在(select top 1 1 from userinfo where Name like '%newcats%';=>r==1?)
bool r22 = _repository.Exists<UserInfo>(new List<DbWhere<UserInfo>> { new DbWhere<UserInfo>(s => s.Name, "newcats", OperateTypeEnum.Like, LogicTypeEnum.And) });

//23.执行存储过程
DynamicParameters dp = new Dapper.DynamicParameters();
dp.Add("@id", 1);
int r23 = _repository.ExecuteStoredProcedure("Usp_GetUserName", dp);

//24.执行sql语句,返回受影响的行数
int r24 = _repository.Execute("delete from userinfo where Id=@id;", dp);

//25.执行查询,并返回由查询返回的结果集中的第一行的第一列,其他行或列将被忽略
string r25 = _repository.ExecuteScalar<string>("select Name from userinfo where Id=@id;", dp);

//26.执行查询,并返回由查询返回的结果集中的第一行的第一列,其他行或列将被忽略
object r26 = _repository.ExecuteScalar("select Name from userinfo where Id=@id;", dp);

//27.执行查询,返回结果集
IEnumerable<UserInfo> r27 = _repository.Query<UserInfo>("select * from userinfo where Id=@id;", dp);

//28.执行单行查询,返回结果
UserInfo r28 = _repository.QueryFirstOrDefault<UserInfo>("select * from userinfo where Id=@id;", dp);

//29.事务一
using (var tran = _repository.BeginTransaction())
{
    try
    {
        _repository.Delete<UserInfo>(1, tran);
        _repository.Delete<UserInfo>(2, tran);
        tran.Commit();
    }
    catch (Exception)
    {
        tran.Rollback();
        throw;
    }
}

//30.事务二
using (var tran = _repository.BeginTransaction(System.Data.IsolationLevel.ReadCommitted))
{
    try
    {
        _repository.Delete<UserInfo>(1, tran);
        _repository.Delete<UserInfo>(2, tran);
        tran.Commit();
    }
    catch (Exception)
    {
        tran.Rollback();
        throw;
    }
}

//31.事务三
using (TransactionScope scope = TransactionScopeBuilder.Create(IsolationLevel.ReadUncommitted, true))
{
    try
    {
        _repository.Delete<UserInfo>(1);
        _repository.Delete<UserInfo>(2);
        scope.Complete();
    }
    catch (Exception)
    {
        throw;
    }
}

使用说明:

1.实体类

  • 1.数据库实体类以Entity结尾
  • 2.使用相关特性,对实体类属性进行设置
  • TableAttribute:数据库表名,多表连接时为对应的连接关系
  • KeyAttribute:数据库主键标识
  • DatabaseGeneratedAttribute:数据库生成特性,标识自增、计算列等(插入时会忽略此字段)
  • NotMappedAttribute:数据库中不存在此字段时,使用此特性忽略该字段
  • ColumnAttribute:实体类别名映射特性,标注数据库实际字段名

默认约定

  • 1.若不使用特性,则程序按默认约定进行解析
  • 2.表名称为类名,或者类名去掉Entity字符串
  • 3.主键为Id字段,或者Id结尾的字段
  • 4.推荐使用特性进行设置
UserEntity.cs
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

[Table("User")]
public class UserEntity
{
    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public int Id { get; set; }

    public string Name { get; set; }

    public string AddressId { get; set; }

    [NotMapped]
    public string Phone { get; set; }
}

[Table("Address")]
public class AddressEntity
{
    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public int Id { get; set; }

    public string Name { get; set; }
}

[Table(" User a left join Address b on a.AddressId=b.Id ")]
public class UserDto
{
    [Column("a.Id")]
    public int Id { get; set; }

    [Column("a.Name")]
    public string Name { get; set; }

    [Column("b.Name")]
    public string Address { get; set; }
}

2.新建自定义DbContext,继承自 Newcats.DataAccess.MySql.DbContext

  • 注1:不同的数据库类型继承不同的DbContext基类,此处以MySql为例
  • 注2:若使用了多个数据库连接字符串,需要为每个连接字符串分别定义DbContext
MyDbContext.cs
public class MyDbContext : DbContext
{
    public MyDbContext(IOptions<DataAccess.Core.DbContextOptions> optionsAccessor) : base(optionsAccessor)
    {
    }
}
OtherDbContext.cs
public class OtherDbContext : DbContext
{
    public OtherDbContext(IOptions<DataAccess.Core.DbContextOptions> optionsAccessor) : base(optionsAccessor)
    {
    }
}

3.Startup.cs类里注册相应的服务

Startup.cs
public class Startup
{
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddControllers();

        //第一个DbContext
        services.AddMySqlDataAccess<MyDbContext>(opt =>
        {
            opt.ConnectionString = "ConnectionStringOfMyDbContext";
        });

        //第二个DbContext
        //同一个应用可以注册不同的数据库,例如:services.AddSqlServerDataAccess...
        services.AddMySqlDataAccess<OtherDbContext>(opt =>
        {
            opt.ConnectionString = "ConnectionStringOfOtherDbContext";
        });
    }
}

4.服务层使用依赖注入获取

UserService.cs
public class UserService : IUserService
{
    private readonly Newcats.DataAccess.MySql.IRepository<MyDbContext> _myRepository;
    private readonly Newcats.DataAccess.MySql.IRepository<OtherDbContext> _otherRepository;

    public UserService(Newcats.DataAccess.MySql.IRepository<MyDbContext> myRepository, Newcats.DataAccess.MySql.IRepository<OtherDbContext> otherRepository)
    {
         _myRepository = myRepository;
        _otherRepository = otherRepository;
    }

    public async Task<UserEntity> GetAsync(int id)
    {
        //根据主键Id获取一条记录
        return await _myRepository.GetAsync<UserEntity>(id);
    }

    public async Task<IEnumerable<AddressInfo>> GetListAsync(int top)
    {
        //获取Id>=30的前top条记录
        return await _otherRepository.GetTopAsync<AddressInfo>(top, new List<DbWhere>()
        {
            new DbWhere(t=>t.Id, 30, OperateTypeEnum.GreaterEqual)
        });
    }
}

贡献与反馈

如果你在阅读或使用任意一个代码片断时发现Bug,或有更佳实现方式,欢迎提Issue。

对于你提交的代码,如果我们决定采纳,可能会进行相应重构,以统一代码风格。

对于热心的同学,将会把你的名字放到贡献者名单中。


免责声明

  • 虽然代码已经进行了高度审查,并用于自己的项目中,但依然可能存在某些未知的BUG,如果你的生产系统蒙受损失,本人不会对此负责。
  • 出于成本的考虑,将不会对已发布的API保持兼容,每当更新代码时,请注意该问题。

协议

MIT © Newcats


作者: newcats-2021/11/25

Product Compatible and additional computed target framework versions.
.NET net6.0 is compatible.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

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Version Downloads Last updated
2.0.0 529 1/22/2022
1.2.6 290 1/9/2022
1.2.5 295 12/28/2021
1.2.3 283 12/26/2021
1.2.2 283 12/26/2021
1.2.0 326 12/19/2021
1.1.7 327 12/9/2021
1.1.5 3,309 11/25/2021
1.1.3 308 11/18/2021
1.1.1 350 11/18/2021
1.0.4 355 11/18/2021
1.0.3 379 10/26/2021
1.0.2 366 10/25/2021
1.0.1 334 10/25/2021
1.0.0 336 10/21/2021

2021-12-28
1.ReadMe文档增加示例代码

2021-12-26
1.增加insert及getpageinfo分页方法

2021-12-12
1.增加TableAttribute.Schema支持

2021-12-09
1.修复访问修饰符bug

2021-11-25
1.增加详细的使用说明文档,详见github

2021-11-18
1.改为IOptions方式注册服务

2021-11-17
1.IRepository只接收TDbContext,取消TEntity/TPrimaryKey泛型参数
2.主键类型改为object

2021-10-25
1.增加SqlBulkCopy的批量插入接口