Dapper 的 AspNetCore 扩展包

Dapper extensions for ASP.NET Core.

Packages & Status

Packages	NuGet
Dapper.Extension.AspNetCore
Dapper.Extension.AspNetCore.MySql

Features

For these extensions to work, the entity in question MUST have a
key property. Dapper will automatically use a property named "id"
(case-insensitive) as the key property, if one is present.

public class WeatherForecast
{
    public int Id { get; set; } // Works by convention

    public DateTime Date { get; set; }

    public int TemperatureC { get; set; }

    public string Summary { get; set; }
}

If the entity doesn't follow this convention, decorate
a specific property with a [Key] or [ExplicitKey] attribute.

[Table("WeatherForecast")]
public class WeatherForecast
{
    [Key]
    public int ForecastId { get; set; }

    public DateTime Date { get; set; }

    public int TemperatureC { get; set; }

    [Write(false)]
    public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);

    public string Summary { get; set; }
}

All Attributes

• [Table("Tablename")] - use another table name instead of the name of the class

• [Key] - this property represents a database-generated identity/key

• [ExplicitKey] - this property represents an explicit identity/key which is
  not automatically generated by the database

• [Write(true/false)] - this property is (not) writable

• [Computed] - this property is computed and should not be part of updates

Query methods

Get one specific entity

var result = _dapper.QueryFirstOrDefault<WeatherForecast>("select * from WeatherForecast;");

var result = _dapper.QuerySingleOrDefault<WeatherForecast>("select * from WeatherForecast;");

var result = _dapper.QueryFirstOrDefault<WeatherForecast>("select * from WeatherForecast where Id = @id;",new { id = 1 });

var result = _dapper.QueryFirstOrDefault<WeatherForecast>("select * from WeatherForecast where Id = @id;",new { id = 1 });

or a list of all entities in the table

var result = _dapper.Query<WeatherForecast>("select * from WeatherForecast;");

or a list of all entities by page in the table.

var result = _dapper.QueryPlainPage<WeatherForecast>("select * from WeatherForecast limit @Skip,@Take;", pageIndex, pageSize);

var result = _dapper.QueryPage<WeatherForecast>("select count(*) from WeatherForecast;", "select * from WeatherForecast limit @Take OFFSET @Skip;", pageIndex, pageSize);

Get methods

Get one specific entity based on id

var forecast = _dapper.Get<WeatherForecast>(1);

or a list of all entities in the table.

var forecasts = _dapper.GetAll<WeatherForecast>();

Insert methods

Insert one entity

_dapper.Insert(new WeatherForecast { Name = "Volvo" });

or a list of entities.

_dapper.Insert(forecasts);

Update methods

Update one specific entity

_dapper.Update(new WeatherForecast() { Id = 1, Name = "Saab" });

or update a list of entities.

_dapper.Update(forecasts);

Delete methods

Delete an entity by the specified [Key] property

_dapper.Delete(new WeatherForecast() { Id = 1 });

a list of entities

_dapper.Delete(forecasts);

or ALL entities in the table.

_dapper.DeleteAll<WeatherForecast>();

Dapper.Extension.AspNetCore.MySql

Dapper extensions of MySql Database for ASP.NET Core.

Installation

For more information, please view our Getting Started guide.

https://www.nuget.org/packages/Dapper.Extension.AspNetCore.MySql

PM> Install-Package Dapper.Extension.AspNetCore.MySql

Configure

• Add the AddDapperForMySql() call into your ConfigureServices method of the Startup class.

using Microsoft.Extensions.DependencyInjection;

public class Startup
{
    //...

    public void ConfigureServices(IServiceCollection services)
    {
        //...

        // services.AddDapperForMySql("server=localhost;uid=root;pwd=123456;database=demo;charset=utf8mb4;");

        services.AddDapperForMySql(options =>
        {
            options.ConnectionString = Configuration.GetConnectionString("MySql");
        });

        //...
    }
}

• appsettings.{env}.json:

{
  "ConnectionStrings": {
    "MySql": "server=localhost;uid=root;pwd=123456;database=demo;charset=utf8mb4;"
  }
}

Usage

[ApiController]
[Route("[controller]")]
public class WeatherForecastController : ControllerBase
{
    private readonly IDapper _dapper;

    public WeatherForecastController(IDapper dapper)
    {
        _dapper = dapper;
    }

    [HttpGet]
    public IActionResult GetByPage(int pageIndex = 1, int pageSize = 20)
    {
        // var result = _dapper.Query<WeatherForecast>("select * from WeatherForecast;");
        // var result = _dapper.QueryFirstOrDefault<WeatherForecast>("select * from WeatherForecast;");
        // var result = _dapper.QueryFirstOrDefault<WeatherForecast>("select * from WeatherForecast where Id = @id;",new { id = 1 });
        // var result = _dapper.QuerySingleOrDefault<WeatherForecast>("select * from WeatherForecast;");
        // var result = _dapper.QueryFirstOrDefault<WeatherForecast>("select * from WeatherForecast where Id = @id;",new { id = 1 });
        // var result = _dapper.QueryPlainPage<WeatherForecast>("select * from WeatherForecast limit @Skip,@Take;", pageIndex, pageSize);
        var result = _dapper.QueryPage<WeatherForecast>("select count(*) from WeatherForecast;", "select * from WeatherForecast limit @Take OFFSET @Skip;", pageIndex, pageSize);
        return Ok(result);
    }

    [HttpGet("{id}")]
    public IActionResult GetById(int id)
    {
        var result = _dapper.Get<WeatherForecast>(id);
        return Ok(result);
    }

    [HttpPost]
    public void Post()
    {
        var rng = new Random();
        _dapper.Insert(new WeatherForecast
        {
            Date = DateTime.Now.AddDays(rng.Next(Summaries.Length)),
            TemperatureC = rng.Next(-20, 55),
            Summary = Summaries[rng.Next(Summaries.Length)]
        });
    }

    [HttpDelete("id")]
    public void Delete(int id)
    {
        _dapper.Delete(new WeatherForecast() { Id = id });
    }
}