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62 lines
2.0 KiB
62 lines
2.0 KiB
# Dapper 集成
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Dapper 是轻量化的数据库提供者,使用Dapper主要的好处是编写T-SQL查询,它为 `IDbConnection` 接口提供了一些扩展方法.
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ABP没有为Dapper封装许多功能, ABP Dapper库在ABP EntityFrameworkCore的基础上提供了 `DapperRepository<TDbContext>` 基类,在其中提供了Dapper需要的`IDbConnection`和`IDbTransaction`属性,这两个属性可以和[工作单元](Unit-Of-Work.md)很好的配合.
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## 安装
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请先根据[EF Core的集成文档](Entity-Framework-Core.md)安装并配置好EF Core.
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`Volo.Abp.Dapper`是Dapper集成的主要[nuget包](https://www.nuget.org/packages/Volo.Abp.Dapper).
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将其安装到你的项目中(在分层应用程序中适用于 数据访问/基础设施层):
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```shell
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Install-Package Volo.Abp.Dapper
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```
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然后添加 `AbpDapperModule` 模块依赖项(`DependsOn` Attribute) 到 [module](Module-Development-Basics.cn.md)(项目中的Mudole类):
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````C#
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using Volo.Abp.Dapper;
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using Volo.Abp.Modularity;
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namespace MyCompany.MyProject
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{
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[DependsOn(typeof(AbpDapperModule))]
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public class MyModule : AbpModule
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{
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//...
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}
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}
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````
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## 实现Dapper仓储
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下面的代码实现了`Person`仓储, 它需要EF Core的`DbContext`(MyAppDbContext). 你可以注入`PersonDapperRepository`来调用它的方法.
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`DbConnection`和`DbTransaction`来自于`DapperRepository`基类.
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```C#
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public class PersonDapperRepository : DapperRepository<MyAppDbContext>, ITransientDependency
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{
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public PersonDapperRepository(IDbContextProvider<MyAppDbContext> dbContextProvider)
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: base(dbContextProvider)
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{
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}
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public virtual async Task<List<string>> GetAllPersonNames()
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{
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return (await DbConnection.QueryAsync<string>("select Name from People", transaction: DbTransaction))
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.ToList();
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}
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public virtual async Task<int> UpdatePersonNames(string name)
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{
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return await DbConnection.ExecuteAsync("update People set Name = @NewName", new { NewName = name },
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DbTransaction);
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}
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}
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```
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