ASP.Net Core 3.1 Razor Pages和使用Dapper进行CRUD操作
创始人
2024-09-14 21:30:50
0

要使用ASP.Net Core 3.1 Razor Pages和Dapper进行CRUD操作,您需要按照以下步骤进行设置:

  1. 创建一个ASP.Net Core 3.1 Razor Pages项目。

  2. 在项目中安装Dapper和Dapper.Contrib包。可以通过NuGet包管理器或通过命令行运行以下命令来安装它们:

    Install-Package Dapper
    Install-Package Dapper.Contrib
    
  3. 创建一个名为Models的文件夹,并在其中创建一个名为Employee.cs的类,表示员工模型。示例代码如下:

    public class Employee
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public string Email { get; set; }
        public string Department { get; set; }
    }
    
  4. appsettings.json文件中配置数据库连接字符串。示例代码如下:

    {
      "ConnectionStrings": {
        "DefaultConnection": "your_connection_string_here"
      },
      // other configurations...
    }
    
  5. Startup.cs文件的ConfigureServices方法中配置Dapper并注册数据库连接。示例代码如下:

    using Microsoft.Extensions.Configuration;
    using Dapper;
    using System.Data.SqlClient;
    
    public void ConfigureServices(IServiceCollection services)
    {
        // other service configurations...
    
        services.AddTransient(c =>
            new SqlConnection(Configuration.GetConnectionString("DefaultConnection")));
    }
    
  6. 创建一个名为EmployeeRepository.cs的类,用于执行与数据库相关的操作。示例代码如下:

    using Dapper;
    using System.Collections.Generic;
    using System.Data;
    using System.Threading.Tasks;
    
    public class EmployeeRepository
    {
        private readonly IDbConnection _db;
    
        public EmployeeRepository(IDbConnection db)
        {
            _db = db;
        }
    
        public async Task> GetAllEmployees()
        {
            return await _db.QueryAsync("SELECT * FROM Employees");
        }
    
        public async Task GetEmployeeById(int id)
        {
            return await _db.QueryFirstOrDefaultAsync("SELECT * FROM Employees WHERE Id = @Id", new { Id = id });
        }
    
        public async Task CreateEmployee(Employee employee)
        {
            return await _db.ExecuteAsync("INSERT INTO Employees (Name, Email, Department) VALUES (@Name, @Email, @Department)", employee);
        }
    
        public async Task UpdateEmployee(Employee employee)
        {
            return await _db.ExecuteAsync("UPDATE Employees SET Name = @Name, Email = @Email, Department = @Department WHERE Id = @Id", employee);
        }
    
        public async Task DeleteEmployee(int id)
        {
            return await _db.ExecuteAsync("DELETE FROM Employees WHERE Id = @Id", new { Id = id });
        }
    }
    
  7. 创建一个名为Index.cshtml的Razor页面,用于显示所有员工信息。示例代码如下:

    @page
    @model IndexModel
    @{
        ViewData["Title"] = "Employee List";
    }
    
    

    @ViewData["Title"]

    @foreach (var employee in Model.Employees) { }
    Id Name Email Department
    @employee.Id @employee.Name @employee.Email @employee.Department
  8. Index.cshtml.cs文件中创建一个名为IndexModel的Razor页面模型,并在OnGet方法中获取所有员工信息。示例代码如下:

    using Microsoft.AspNetCore.Mvc.RazorPages;
    using System.Collections.Generic;
    using System.Threading.Tasks;
    
    public class IndexModel : PageModel
    {
        private readonly EmployeeRepository _employeeRepository;
    
        public IndexModel(EmployeeRepository employeeRepository)
        {
            _employeeRepository = employeeRepository;
        }
    
        public IEnumerable Employees { get; set; }
    
        public async Task OnGet()
        {
            Employees = await _employeeRepository.GetAllEmployees();
        }
    }
    

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