├── .gitignore ├── Api ├── Api.csproj ├── Api.csproj.user ├── Controllers │ └── EmployeeController.cs ├── Program.cs ├── Properties │ └── launchSettings.json ├── Repositories │ └── Employees │ │ ├── Employee.cs │ │ ├── EmployeeRepository.cs │ │ └── IEmployeeRepository.cs ├── Startup.cs ├── appsettings.Development.json └── appsettings.json ├── DataAccessLayer ├── DataAccessLayer.csproj ├── DbConnectionFactory.cs ├── DocumentRepository.cs ├── IGenericRepository.cs ├── SqlRepository.cs └── XmlRepository.cs ├── LICENSE └── README.md /.gitignore: -------------------------------------------------------------------------------- 1 | *.sln 2 | */bin 3 | */obj 4 | .vs 5 | .vscode -------------------------------------------------------------------------------- /Api/Api.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | netcoreapp2.2 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | -------------------------------------------------------------------------------- /Api/Api.csproj.user: -------------------------------------------------------------------------------- 1 |  2 | 3 | 4 | ApiControllerEmptyScaffolder 5 | root/Controller 6 | 600 7 | True 8 | False 9 | True 10 | 11 | False 12 | 13 | -------------------------------------------------------------------------------- /Api/Controllers/EmployeeController.cs: -------------------------------------------------------------------------------- 1 | using System.Threading.Tasks; 2 | using Microsoft.AspNetCore.Mvc; 3 | 4 | namespace Api.Controllers 5 | { 6 | [Route("api/[controller]")] 7 | [ApiController] 8 | public class EmployeeController : ControllerBase 9 | { 10 | private IEmployeeRepository _employeeRepo; 11 | 12 | public EmployeeController(IEmployeeRepository employeeRepo) 13 | { 14 | _employeeRepo = employeeRepo; 15 | } 16 | 17 | [HttpGet] 18 | public async Task Get() 19 | { 20 | var employees = await _employeeRepo.GetAllAsync(); 21 | return Newtonsoft.Json.JsonConvert.SerializeObject(employees); 22 | } 23 | 24 | [HttpPost] 25 | public IActionResult Create(Employee employee) 26 | { 27 | _employeeRepo.InsertAsync(employee); 28 | return Ok(); 29 | } 30 | 31 | [HttpPut("{id}")] 32 | public IActionResult Update(int id, Employee employee) 33 | { 34 | _employeeRepo.UpdateAsync(employee); 35 | return Ok(); 36 | } 37 | 38 | [HttpDelete("{id}")] 39 | public IActionResult Delete(int id) 40 | { 41 | _employeeRepo.DeleteAsync(id); 42 | return Ok(); 43 | } 44 | } 45 | } -------------------------------------------------------------------------------- /Api/Program.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.IO; 4 | using System.Linq; 5 | using System.Threading.Tasks; 6 | using Microsoft.AspNetCore; 7 | using Microsoft.AspNetCore.Hosting; 8 | using Microsoft.Extensions.Configuration; 9 | using Microsoft.Extensions.Logging; 10 | 11 | namespace Api 12 | { 13 | public class Program 14 | { 15 | public static void Main(string[] args) 16 | { 17 | CreateWebHostBuilder(args).Build().Run(); 18 | } 19 | 20 | public static IWebHostBuilder CreateWebHostBuilder(string[] args) => 21 | WebHost.CreateDefaultBuilder(args) 22 | .UseStartup(); 23 | } 24 | } 25 | -------------------------------------------------------------------------------- /Api/Properties/launchSettings.json: -------------------------------------------------------------------------------- 1 | { 2 | "iisSettings": { 3 | "windowsAuthentication": false, 4 | "anonymousAuthentication": true, 5 | "iisExpress": { 6 | "applicationUrl": "http://localhost:61554", 7 | "sslPort": 44382 8 | } 9 | }, 10 | "$schema": "http://json.schemastore.org/launchsettings.json", 11 | "profiles": { 12 | "IIS Express": { 13 | "commandName": "IISExpress", 14 | "launchBrowser": true, 15 | "launchUrl": "api/employee", 16 | "environmentVariables": { 17 | "ASPNETCORE_ENVIRONMENT": "Development" 18 | } 19 | }, 20 | "Api": { 21 | "commandName": "Project", 22 | "launchBrowser": true, 23 | "launchUrl": "api/values", 24 | "environmentVariables": { 25 | "ASPNETCORE_ENVIRONMENT": "Development" 26 | }, 27 | "applicationUrl": "https://localhost:5001;http://localhost:5000" 28 | } 29 | } 30 | } -------------------------------------------------------------------------------- /Api/Repositories/Employees/Employee.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | 3 | namespace Api 4 | { 5 | public class Employee 6 | { 7 | public int Id { get; set; } 8 | public string Name { get; set; } 9 | } 10 | } 11 | -------------------------------------------------------------------------------- /Api/Repositories/Employees/EmployeeRepository.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Data; 4 | using System.Linq; 5 | using System.Threading.Tasks; 6 | using Dapper; 7 | using DataAccessLayer; 8 | 9 | namespace Api 10 | { 11 | public class EmployeeRepository : SqlRepository, IEmployeeRepository 12 | { 13 | public EmployeeRepository(string connectionString) : base(connectionString) { } 14 | 15 | public override async void DeleteAsync(int id) 16 | { 17 | using (var conn = GetOpenConnection()) 18 | { 19 | var sql = "DELETE FROM Employee WHERE Id = @Id"; 20 | var parameters = new DynamicParameters(); 21 | parameters.Add("@Id", id, System.Data.DbType.Int32); 22 | await conn.QueryFirstOrDefaultAsync(sql, parameters); 23 | } 24 | } 25 | 26 | public override async Task> GetAllAsync() 27 | { 28 | using (var conn = GetOpenConnection()) 29 | { 30 | var sql = "SELECT * FROM Employee"; 31 | return await conn.QueryAsync(sql); 32 | } 33 | } 34 | 35 | public override async Task FindAsync(int id) 36 | { 37 | using (var conn = GetOpenConnection()) 38 | { 39 | var sql = "SELECT * FROM Employee WHERE Id = @Id"; 40 | var parameters = new DynamicParameters(); 41 | parameters.Add("@Id", id, System.Data.DbType.Int32); 42 | return await conn.QueryFirstOrDefaultAsync(sql, parameters); 43 | } 44 | } 45 | 46 | public override async void InsertAsync(Employee entity) 47 | { 48 | using (var conn = GetOpenConnection()) 49 | { 50 | var sql = "INSERT INTO Employee(Name) " 51 | + "VALUES(@Name)"; 52 | 53 | var parameters = new DynamicParameters(); 54 | parameters.Add("@Name", entity.Name, System.Data.DbType.String); 55 | 56 | await conn.QueryAsync(sql, parameters); 57 | } 58 | } 59 | 60 | public override async void UpdateAsync(Employee entityToUpdate) 61 | { 62 | using (var conn = GetOpenConnection()) 63 | { 64 | var existingEntity = await FindAsync(entityToUpdate.Id); 65 | 66 | var sql = "UPDATE Employee " 67 | + "SET "; 68 | 69 | var parameters = new DynamicParameters(); 70 | if (existingEntity.Name != entityToUpdate.Name) 71 | { 72 | sql += "Name=@Name,"; 73 | parameters.Add("@Name", entityToUpdate.Name, DbType.String); 74 | } 75 | 76 | sql = sql.TrimEnd(','); 77 | 78 | sql += " WHERE Id=@Id"; 79 | parameters.Add("@Id", entityToUpdate.Id, DbType.Int32); 80 | 81 | await conn.QueryAsync(sql, parameters); 82 | } 83 | } 84 | 85 | public Task MyCustomRepositoryMethodExampleAsync() 86 | { 87 | throw new NotImplementedException(); 88 | } 89 | } 90 | } 91 | -------------------------------------------------------------------------------- /Api/Repositories/Employees/IEmployeeRepository.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Text; 4 | using System.Threading.Tasks; 5 | using DataAccessLayer; 6 | 7 | namespace Api 8 | { 9 | public interface IEmployeeRepository : IGenericRepository 10 | { 11 | Task MyCustomRepositoryMethodExampleAsync(); 12 | } 13 | } 14 | -------------------------------------------------------------------------------- /Api/Startup.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Data.SqlClient; 4 | using System.Linq; 5 | using System.Threading.Tasks; 6 | using Microsoft.AspNetCore.Builder; 7 | using Microsoft.AspNetCore.Hosting; 8 | using Microsoft.AspNetCore.HttpsPolicy; 9 | using Microsoft.AspNetCore.Mvc; 10 | using Microsoft.Extensions.Configuration; 11 | using Microsoft.Extensions.DependencyInjection; 12 | using Microsoft.Extensions.Logging; 13 | using Microsoft.Extensions.Options; 14 | 15 | namespace Api 16 | { 17 | public class Startup 18 | { 19 | public Startup(IConfiguration configuration) 20 | { 21 | Configuration = configuration; 22 | } 23 | 24 | public IConfiguration Configuration { get; } 25 | 26 | // This method gets called by the runtime. Use this method to add services to the container. 27 | public void ConfigureServices(IServiceCollection services) 28 | { 29 | // There's more than one way to skin a cat. In an enterprise app, I would configure this via the Options Pattern using IOptions 30 | services.AddTransient(x => new EmployeeRepository(Configuration.GetConnectionString("Default"))); 31 | services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1); 32 | } 33 | 34 | // This method gets called by the runtime. Use this method to configure the HTTP request pipeline. 35 | public void Configure(IApplicationBuilder app, IHostingEnvironment env) 36 | { 37 | if (env.IsDevelopment()) 38 | { 39 | app.UseDeveloperExceptionPage(); 40 | } 41 | else 42 | { 43 | app.UseHsts(); 44 | } 45 | 46 | app.UseHttpsRedirection(); 47 | app.UseMvc(); 48 | } 49 | } 50 | } 51 | -------------------------------------------------------------------------------- /Api/appsettings.Development.json: -------------------------------------------------------------------------------- 1 | { 2 | "Logging": { 3 | "LogLevel": { 4 | "Default": "Debug", 5 | "System": "Information", 6 | "Microsoft": "Information" 7 | } 8 | } 9 | } 10 | -------------------------------------------------------------------------------- /Api/appsettings.json: -------------------------------------------------------------------------------- 1 | { 2 | "Logging": { 3 | "LogLevel": { 4 | "Default": "Warning" 5 | } 6 | }, 7 | "AllowedHosts": "*", 8 | "ConnectionStrings": { 9 | "Default": "Server=localhost;Database=adoTest;Trusted_Connection=True;MultipleActiveResultSets=true" 10 | } 11 | } 12 | -------------------------------------------------------------------------------- /DataAccessLayer/DataAccessLayer.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | netstandard2.0 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | -------------------------------------------------------------------------------- /DataAccessLayer/DbConnectionFactory.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Data; 4 | using System.Data.SqlClient; 5 | using System.Text; 6 | 7 | namespace DataAccessLayer 8 | { 9 | class DbConnectionFactory 10 | { 11 | public static IDbConnection GetDbConnection(EDbConnectionTypes dbType, string connectionString) 12 | { 13 | IDbConnection connection = null; 14 | 15 | switch (dbType) 16 | { 17 | case EDbConnectionTypes.SQL: 18 | connection = new SqlConnection(connectionString); 19 | break; 20 | case EDbConnectionTypes.XML: 21 | // TODO: Implement XML Connection (path name) 22 | break; 23 | case EDbConnectionTypes.DOCUMENT: 24 | // TODO: Implement Document DB connection 25 | break; 26 | default: 27 | connection = null; 28 | break; 29 | } 30 | 31 | connection.Open(); 32 | return connection; 33 | } 34 | } 35 | 36 | public enum EDbConnectionTypes 37 | { 38 | SQL, 39 | DOCUMENT, 40 | XML 41 | } 42 | } 43 | -------------------------------------------------------------------------------- /DataAccessLayer/DocumentRepository.cs: -------------------------------------------------------------------------------- 1 | using Dapper; 2 | using System.Collections.Generic; 3 | using System.Data; 4 | using System.Threading.Tasks; 5 | 6 | namespace DataAccessLayer 7 | { 8 | /// 9 | /// The concrete implementation of a Document repository 10 | /// 11 | /// 12 | public abstract class DocumentRepository : IGenericRepository 13 | where TEntity : class 14 | { 15 | private string _connectionString; 16 | private EDbConnectionTypes _dbType; 17 | 18 | public DocumentRepository(string connectionString) 19 | { 20 | _dbType = EDbConnectionTypes.DOCUMENT; 21 | _connectionString = connectionString; 22 | } 23 | 24 | public IDbConnection GetOpenConnection() 25 | { 26 | return DbConnectionFactory.GetDbConnection(_dbType, _connectionString); 27 | } 28 | 29 | public abstract void DeleteAsync(int id); 30 | public abstract Task> GetAllAsync(); 31 | public abstract Task FindAsync(int id); 32 | public abstract void InsertAsync(TEntity entity); 33 | public abstract void UpdateAsync(TEntity entityToUpdate); 34 | } 35 | } 36 | -------------------------------------------------------------------------------- /DataAccessLayer/IGenericRepository.cs: -------------------------------------------------------------------------------- 1 | using Dapper; 2 | using System.Collections.Generic; 3 | using System.Data; 4 | using System.Threading.Tasks; 5 | 6 | namespace DataAccessLayer 7 | { 8 | public interface IGenericRepository 9 | { 10 | IDbConnection GetOpenConnection(); 11 | Task> GetAllAsync(); 12 | Task FindAsync(int id); 13 | void InsertAsync(TEntity entity); 14 | void DeleteAsync(int id); 15 | void UpdateAsync(TEntity entityToUpdate); 16 | } 17 | } 18 | -------------------------------------------------------------------------------- /DataAccessLayer/SqlRepository.cs: -------------------------------------------------------------------------------- 1 | using Dapper; 2 | using System.Collections.Generic; 3 | using System.Data; 4 | using System.Threading.Tasks; 5 | 6 | namespace DataAccessLayer 7 | { 8 | /// 9 | /// The concrete implementation of a SQL repository 10 | /// 11 | /// 12 | public abstract class SqlRepository : IGenericRepository 13 | where TEntity : class 14 | { 15 | private string _connectionString; 16 | private EDbConnectionTypes _dbType; 17 | 18 | public SqlRepository(string connectionString) 19 | { 20 | _dbType = EDbConnectionTypes.SQL; 21 | _connectionString = connectionString; 22 | } 23 | 24 | public IDbConnection GetOpenConnection() 25 | { 26 | return DbConnectionFactory.GetDbConnection(_dbType, _connectionString); 27 | } 28 | 29 | public abstract void DeleteAsync(int id); 30 | public abstract Task> GetAllAsync(); 31 | public abstract Task FindAsync(int id); 32 | public abstract void InsertAsync(TEntity entity); 33 | public abstract void UpdateAsync(TEntity entityToUpdate); 34 | } 35 | } 36 | -------------------------------------------------------------------------------- /DataAccessLayer/XmlRepository.cs: -------------------------------------------------------------------------------- 1 | using Dapper; 2 | using System.Collections.Generic; 3 | using System.Data; 4 | using System.Threading.Tasks; 5 | 6 | namespace DataAccessLayer 7 | { 8 | /// 9 | /// The concrete implementation of an XML repository 10 | /// 11 | /// 12 | public abstract class XmlRepository : IGenericRepository 13 | where TEntity : class 14 | { 15 | private string _connectionString; 16 | private EDbConnectionTypes _dbType; 17 | 18 | public XmlRepository(string filePath) 19 | { 20 | _dbType = EDbConnectionTypes.XML; 21 | _connectionString = filePath; 22 | } 23 | 24 | public IDbConnection GetOpenConnection() 25 | { 26 | return DbConnectionFactory.GetDbConnection(_dbType, _connectionString); 27 | } 28 | 29 | public abstract void DeleteAsync(int id); 30 | public abstract Task> GetAllAsync(); 31 | public abstract Task FindAsync(int id); 32 | public abstract void InsertAsync(TEntity entity); 33 | public abstract void UpdateAsync(TEntity entityToUpdate); 34 | } 35 | } 36 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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Unfortunately, [EF has a lot of overhead as an ORM](https://github.com/StackExchange/Dapper), whereas Dapper is twice as fast. I created this project to explore what implementing a Dapper Data Access Layer would look like. 5 | 6 | ## Overview 7 | The goal of my architecture was to encapsulate any data access specific logic in the Repository layer of the app. I used the `Employee` object as an example. `EmployeeRepository` implements an abstract class which will dictate which data source it will use. In this case, it is using SQL (`SqlRepository`), but I also stubbed out Document and XML repositories. 8 | 9 | `SqlRepository` (and all other abstract repositories) implements `IGenericRepository`, which is the minimum required contract for accessing the data source. The abstract repos implement the logic necessary to open a connection with the data sources, which they can easily get from the `DbConnectionFactory`. Finally, any extension methods that are unique to a model's repository can be implemented in an additional interface - which I demonstrate with `IEmployeeRepository`. 10 | --------------------------------------------------------------------------------