Newcats.DataAccess.PostgreSql
1.2.5
There is a newer version of this package available.
See the version list below for details.
See the version list below for details.
dotnet add package Newcats.DataAccess.PostgreSql --version 1.2.5
NuGet\Install-Package Newcats.DataAccess.PostgreSql -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.PostgreSql" 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.PostgreSql --version 1.2.5
The NuGet Team does not provide support for this client. Please contact its maintainers for support.
#r "nuget: Newcats.DataAccess.PostgreSql, 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.PostgreSql as a Cake Addin #addin nuget:?package=Newcats.DataAccess.PostgreSql&version=1.2.5 // Install Newcats.DataAccess.PostgreSql as a Cake Tool #tool nuget:?package=Newcats.DataAccess.PostgreSql&version=1.2.5
The NuGet Team does not provide support for this client. Please contact its maintainers for support.
Newcats.DataAccess.PostgreSql 使用说明
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.PostgreSql.DbContext
- 注1:不同的数据库类型继承不同的DbContext基类,此处以PostgreSql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.AddPostgreSqlDataAccess<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.AddPostgreSqlDataAccess<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.PostgreSql.IRepository<MyDbContext> _myRepository;
private readonly Newcats.DataAccess.PostgreSql.IRepository<OtherDbContext> _otherRepository;
public UserService(Newcats.DataAccess.PostgreSql.IRepository<MyDbContext> myRepository, Newcats.DataAccess.PostgreSql.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-2021/12/05
Product | Versions 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.
-
net6.0
- Newcats.DataAccess.Core (>= 1.2.5)
- Npgsql (>= 6.0.2)
NuGet packages
This package is not used by any NuGet packages.
GitHub repositories
This package is not used by any popular GitHub repositories.
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
2021-12-23
1.升级Npgsql包
2021-12-12
1.增加TableAttribute.Schema支持
2021-12-16
1.完成SqlBulkCopy实现
2021-12-09
1.完成基本的CRUD方法(SqlBulkCopy暂未实现)
2.增加详细的使用说明文档,详见github