.Net Core3.0 WebApi 六: Sqlsugar+异步泛型仓储

.Net Core3.0 WebApi 目录

SqlSugar介绍

SqlSugar是国人开发者开发的一款基于.NET的ORM框架，是可以运行在.NET 4.+ & .NET CORE的高性能、轻量级 ORM框架，众多.NET框架中最容易使用的数据库访问技术。官网http://www.codeisbug.com/Doc/8

SqlSugar的优点:

1、高性能 ,不夸张的说，去掉Sql在数据库执行的时间，SqlSugar是EF数倍性能，另外在批量操作和一对多查询上也有不错的SQL优化

2、高扩展性 ，支持自定义拉姆达函数解析、扩展数据类型、支持自定义实体特性，外部缓存等

3、稳定性和技术支持，  虽然不是官方ORM, 但在稳定性上也是有着数年用户积累，如果遇到问题可以在GITHUB提出来，会根据紧急度定期解决

4、功能全面，虽然SqlSugar小巧可功能并不逊色于EF框架

5、创新、持续更新 ，向下兼容

此篇博客，我就不实际连接数据库了。写一些假数据放在这里。

Repository 和Model层中引入SqlSugar

 在数据库中新建一个UserNew表格，然后再Models层中对应的实体类：

///<summary>
///用户表
///</summary>
[SugarTable("UserNew")]
public partial class UserNew
{
    /// <summary>
    /// Desc:用户ID
    /// Default:
    /// Nullable:False
    /// </summary>           
    [SugarColumn(IsPrimaryKey = true, IsIdentity = true)]
    public int UserId { get; set; }

    /// <summary>
    /// Desc:用户名
    /// Default:
    /// Nullable:True
    /// </summary>           
    public string UserName { get; set; }

    /// <summary>
    /// Desc:年龄
    /// Default:
    /// Nullable:True
    /// </summary>           
    public int? Age { get; set; }

在基础设施层封装一个数据库上下文：

 public sealed class SugarDbContext
 {
     public static SqlSugarClient Instance //注意当前方法的类不能是静态的 public static class这么写是错误的
     {
         get
         {
             var db = new SqlSugarClient(new ConnectionConfig()
             {
                 ConnectionString = "数据库连接，放在配置文件中",
                 DbType = DbType.SqlServer,
                 //IsAutoCloseConnection = true,
                 InitKeyType = InitKeyType.Attribute
             });

             db.Aop.OnLogExecuting = (sql, pars) =>
             {
                 Console.WriteLine(sql + "
" + db.Utilities.SerializeObject(pars.ToDictionary(it => it.ParameterName, it => it.Value)));
                 Console.WriteLine();
             };

             return db;
         }
     }

 }

设计仓储基类接口——IBaseRepository.cs

IRepository 层中添加Base文件夹，并添加接口 IBaseRepository.cs。

namespace WebApi.Core.IRepository
{
    /// <summary>
    /// 基类接口,其他接口继承该接口
    /// </summary>
    /// <typeparam name="TEntity"></typeparam>
    public interface IBaseRepository<TEntity> where TEntity : class
    {
        /// <summary>
        /// 根据ID查询
        /// </summary>
        /// <param name="objId"></param>
        /// <returns></returns>
        Task<TEntity> QueryByID(object objId);

        /// <summary>
        /// 添加
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        Task<bool> Add(TEntity model);

        /// <summary>
        /// 修改
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        Task<bool> Update(TEntity model);

        /// <summary>
        /// 删除
        /// </summary>
        /// <param name="ids"></param>
        /// <returns></returns>
        Task<bool> DeleteByIds(object[] ids);

    }
}

继承基接口

IRepository 层中，将其他的接口，继承Base，新建IUserRepository.cs，然后将其他所有的方法都继承该基类方法

public interface IUserRepository : IBaseRepository<UserNew>
{
}

对仓储基接口进行实现

Repository 层中，添加Base文件夹，并添加 BaseRepository.cs 基类

namespace WebApi.Core.Repository
{
    public class BaseRepository<TEntity> : IBaseRepository<TEntity> where TEntity : class, new()
    {
        /// <summary>
        /// 写入实体数据
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public async Task<bool> Add(TEntity model)
        {
            using var dbcontext = SugarDbContext.Instance;
            var i = await Task.Run(() => dbcontext.Insertable(model).ExecuteReturnBigIdentity());
            //返回的i是long类型,这里你可以根据你的业务需要进行处理
            return i > 0;
        }

        /// <summary>
        /// 根据ID删除
        /// </summary>
        /// <param name="ids"></param>
        /// <returns></returns>
        public async Task<bool> DeleteByIds(object[] ids)
        {
            using var dbcontext = SugarDbContext.Instance;
            var i = await Task.Run(() => dbcontext.Deleteable<TEntity>().In(ids).ExecuteCommand());
            return i > 0;
        }

        /// <summary>
        /// 根据ID查询一条数据
        /// </summary>
        /// <param name="objId"></param>
        /// <returns></returns>
        public async Task<TEntity> QueryByID(object objId)
        {
            using var dbcontext = SugarDbContext.Instance;
            return await Task.Run(() => dbcontext.Queryable<TEntity>().InSingle(objId));
        }

        /// <summary>
        /// 更新实体数据
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public async Task<bool> Update(TEntity model)
        {
            using var dbcontext = SugarDbContext.Instance;
            //这种方式会以主键为条件
            var i = await Task.Run(() => dbcontext.Updateable(model).ExecuteCommand());
            return i > 0;
        }
    }
}

Repository层新建UserRepository，继承BaseRepository和IUserRepository

 public class UserRepository : BaseRepository<UserNew>, IUserRepository
 {
     
 }

业务逻辑层基类与基接口

IService 层中添加Base文件夹，并添加接口 IBaseService.cs。

public interface IBaseServices<TEntity> where TEntity : class
{
    /// <summary>
    /// 根据ID列表删除
    /// </summary>
    /// <param name="ids"></param>
    /// <returns></returns>
    Task<bool> DeleteByIds(object[] ids);

    /// <summary>
    /// 根据ID查询
    /// </summary>
    /// <param name="objId"></param>
    /// <returns></returns>
    Task<TEntity> QueryByID(object objId);

    /// <summary>
    /// 添加实体
    /// </summary>
    /// <param name="model"></param>
    /// <returns></returns>
    Task<bool> Add(TEntity model);

    /// <summary>
    /// 更新实体
    /// </summary>
    /// <param name="model"></param>
    /// <returns></returns>

    Task<bool> Update(TEntity model);
}

Service 层中添加Base文件夹，并添加接口 BaseService.cs。并添加 BaseService.cs 基类

namespace WebApi.Core.Services.Base
{
    public class BaseServices<TEntity> : IBaseServices<TEntity> where TEntity : class, new()
    {
        public IBaseRepository<TEntity> baseDal = new BaseRepository<TEntity>();

        /// <summary>
        /// 写入实体
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public async Task<bool> Add(TEntity model)
        {
            return await baseDal.Add(model);
        }

        /// <summary>
        /// 根据ID删除
        /// </summary>
        /// <param name="ids"></param>
        /// <returns></returns>

        public async Task<bool> DeleteByIds(object[] ids)
        {
            return await baseDal.DeleteByIds(ids);
        }

        /// <summary>
        /// 根据ID查询
        /// </summary>
        /// <param name="objId"></param>
        /// <returns></returns>
        public async Task<TEntity> QueryByID(object objId)
        {
            return await baseDal.QueryByID(objId);
        }

        /// <summary>
        /// 更新实体
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        public async Task<bool> Update(TEntity model)
        {
            return await baseDal.Update(model);
        }
    }
}

IService 层新建IUserService，继承BaseService

 public interface IUserService : IBaseServices<UserNew>
 {

 }

Service 层新建UserService，继承BaseService和IUserService

public class UserService : BaseServices<UserNew>, IUserService
{

}

控制器里面新增接口：

/// <summary>
/// 根据id获取数据
/// </summary>
/// <param name="id">参数id</param>
/// <returns></returns>
[HttpGet("{id}", Name = "Get")]
public async Task<IActionResult> GetUser(int id)
{
    IUserService userService = new UserService();
    UserNew user = await userService.QueryByID(id);
    return Ok(user);
}


/// <summary>
/// 添加数据
/// </summary>
/// <param name="user">参数user</param>
/// <returns></returns>
[HttpGet("{id}", Name = "Get")]
public async Task<IActionResult> Add(UserNew user)
{
    IUserService userService = new UserService();
    var count = await userService.Add(user);
    return Ok(count);
}

/// <summary>
/// 更新数据
/// </summary>
/// <param name="user">参数user</param>
/// <returns></returns>
[HttpGet("{id}", Name = "Get")]
public async Task<IActionResult> Update(UserNew user)
{
    IUserService userService = new UserService();
    var sucess = await userService.Update(user);
    return Ok(sucess);
}

/// <summary>
/// 删除数据
/// </summary>
/// <param name="ids">参数ids</param>
/// <returns></returns>
[HttpGet("{id}", Name = "Get")]
public async Task<IActionResult> Delete(object[] ids)
{
    IUserService userService = new UserService();
    var sucess = await userService.DeleteByIds(ids);
    return Ok(sucess);
}

仓储模式，一般使用sqlsugar的仓储就够了，http://www.donet5.com/Home/Doc?typeId=1228

接口，可自行调试。