一、创建项目
1.1.创建新项目:打开开发工具>创建新项目>搜索API>选择C#语言的ASP.NET Core Web API
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1.2.配置新项目:**自定义项目信息以及存储路径
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1.3.其他信息:这里框架必须选择.NET 6.0,其他配置默认勾选即可,也可以根据自己的需求进行更改
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1.4.创建完成之后就得到了一个最基础的Core6项目框架代码
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Program.cs就是该项目程序的配置,在Core6中Program.cs 集成了 Startup.cs 的配置
项目结构分析,.net6中删除了startup.cs,整合到了Program.cs
创建Controller
可以先将系统默认创建的WeatherForecastController.cs和WeatherForecast.cs进行删除,然后在controller文件夹新建一个控制器,命名:UserController.cs
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在UserController中增加一个Hello的get方式的接口方法,返回"你好世界",通过请求api/user/hello来获取该接口的结果
cs
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
namespace WebApplication1.Controllers
{
[Route("api/[controller]")]
[ApiController]
public class UserController : ControllerBase
{
[HttpGet("[action]")]
public IActionResult SayHello()
{
return new JsonResult("Hello World");
}
}
}
点击运行后,开发工具会自动编译后启动。
会生成一个exe文件并自动运行,运行成功后会打开浏览器进行查看
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总结
其实项目的创建以及控制器的创建和 core3是一致,只是.Net Core 6 给我的感觉就是比以往的版本更精简。可以将Swagger在创建项目时直接生成,而不需要手动的去配置
建立数据库连接(SQLServer)
二、读取appsettings.json
使用Nuget安装
Microsoft.Extensions.Configuration
Microsoft.Extensions.Configuration.Json
Microsoft.Extensions.Configuration.Binder
根据自己的开发环境选择合适的版本进行安装
2.1、修改Program.cs
①在 var builder = WebApplication.CreateBuilder(args); 前增加
cs
using WebApplication1.Helper;
//获取当前环境:提供两种方法
//方法一
//① var env = Environment.GetEnvironmentVariables();
//从env中获取环境
//② var envName = env["ASPNETCORE_ENVIRONMENT"];
//方法二
//var env2 = WebApplication.CreateBuilder().Environment.EnvironmentName;
//读取配置文件
//IConfiguration configuration = new ConfigurationBuilder().AddJsonFile($"appsettings.{env2}.json").Build();
//读取配置文件
IConfiguration configuration = new ConfigurationBuilder()
.AddJsonFile("appsettings.json")
.Build();
var builder = WebApplication.CreateBuilder(args);
// Add services to the container.
builder.Services.AddControllers();
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
var app = builder.Build();
// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
app.UseSwagger();
app.UseSwaggerUI();
}
app.UseHttpsRedirection();
app.UseAuthorization();
app.MapControllers();
app.Run();
②在 var builder = WebApplication.CreateBuilder(args); 后增加
cs
using WebApplication1.Helper;
//获取当前环境:提供两种方法
//方法一
//① var env = Environment.GetEnvironmentVariables();
//从env中获取环境
//② var envName = env["ASPNETCORE_ENVIRONMENT"];
//方法二
//var env2 = WebApplication.CreateBuilder().Environment.EnvironmentName;
//读取配置文件
//IConfiguration configuration = new ConfigurationBuilder().AddJsonFile($"appsettings.{env2}.json").Build();
//读取配置文件
IConfiguration configuration = new ConfigurationBuilder()
.AddJsonFile("appsettings.json")
.Build();
var builder = WebApplication.CreateBuilder(args);
builder.Services.AddSingleton(new Appsettings(configuration));
// Add services to the container.
builder.Services.AddControllers();
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
var app = builder.Build();
// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
app.UseSwagger();
app.UseSwaggerUI();
}
app.UseHttpsRedirection();
app.UseAuthorization();
app.MapControllers();
app.Run();
③读取
appsettings.json 代码
cs
{
"Logging": {
"LogLevel": {
"Default": "Information",
"Microsoft.AspNetCore": "Warning"
}
},
"AllowedHosts": "*",
"AppSettings": {
//数据库连接字符串
"ConnectionString": "Server=127.0.0.1;User Id=用户id;Password=密码;Database=数据库名称;"
}
}
1、新建控制器,配置api路由
3 编写代码
配置数据库连接
在项目根目录下的 appsettings.json 文件中配置数据库连接信息。
2、打开配置文件appsettings.json,配置连接SQLserver的账号和密码。
cs
{
/*
"ConnectionStrings": {
"DefaultConnection": "Server=localhost;Database=MyInventorySystem;User ID=sa;Password=123456;Trusted_Connection=True;"
},
*/
// "Constr": "Data Source=127.0.0.1;Database=TestBase;Uid=sa;Pwd=123", //添加数据库的连接地址
"Constr": "Data Source=aliworks.cn,57468;Database=DBAliTemp;Uid=test_db;Pwd=alibaba123456", //添加数据库的连接地址
"Logging": {
"LogLevel": {
"Default": "Information",
"Microsoft.AspNetCore": "Warning"
}
},
"AllowedHosts": "*"
}