如何在没有实体框架的情况下连接到ASP.NET Core中的数据库? [英] How can I connect to a database in ASP.NET Core without Entity Framework?
问题描述
如何在没有实体框架的情况下从ASP.NET Core和Angular连接到数据库?
How can I connect to a database from ASP.NET Core and Angular without Entity Framework?
"ConnectionStrings": {
"DefaultParkingConnection": "Server=DESKTOP-CD0M0C3\\SQLEXPRESS;Database=ParkingSystem2;Trusted_Connection=True;MultipleActiveResultSets=true;User ID=sa;Password=P@ssw0rd"
},
如何在Web API控制器中获取连接字符串?
How can I get connection string in Web API controller?
string constr = ConfigurationManager.ConnectionStrings["DefaultParkingConnection"].ConnectionString;
推荐答案
ASP.Net Core与ASP.Net的工作原理不同,因此您需要将appsettings.json
中定义的连接字符串映射到要在整个过程中访问的类或变量.应用程序.请尝试以下方法.创建appSettings.json
:
ASP.Net Core works different than ASP.Net, so you need to map the connection strings defined in appsettings.json
to a class or variable to be accessed throughout the application. Try the following approach. Create appSettings.json
:
{
"ConnectionStrings": {
"DefaultParkingConnection": "Server=DESKTOP-CD0M0C3\\SQLEXPRESS;Database=ParkingSystem2;Trusted_Connection=True;MultipleActiveResultSets=true;User ID=sa;Password=P@ssw0rd"
}
}
创建一个新类ConnectionStrings.cs
以将appSettings.json
中定义的连接字符串映射到它:
Create a new class ConnectionStrings.cs
to map the connection strings defined in appSettings.json
to it:
using System;
namespace Test
{
public class ConnectionStrings
{
public string DefaultParkingConnection{ get; set; }
}
}
在Startup.cs
中,编写以下代码:
public class Startup
{
public IConfiguration Configuration { get; }
public Startup(IConfiguration configuration)
{
this.Configuration = configuration;
}
public void ConfigureServices(IServiceCollection services)
{
//Map the configuration
var connectionSection = Configuration.GetSection("ConnectionStrings");
services.Configure<ConnectionStrings>(connectionSection );
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
// Configure
}
}
现在在控制器中,您可以轻松使用它而无需创建类的实例:
Now in controllers, you can easily use it without creating the instance of the class:
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Options;
namespace Test.Controllers
{
[ApiController]
[Route("api/account")]
public class AccountController : ControllerBase
{
private readonly ConnectionStrings connectionStrings;
public AccountController(IOptions<ConnectionStrings> connectionStrings)
{
this.connectionStrings = connectionStrings.Value;
}
[HttpGet, Route("test")]
public IActionResult Test()
{
return Ok("test");
}
}
}
这篇关于如何在没有实体框架的情况下连接到ASP.NET Core中的数据库?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!