table of Contents
EDITORIAL
You can create C # language RESTfulservice, it is called WebApi. Summarized here support the use of learning to create, read, update, delete (CRUD) operations to create ASP.NET Core RESTfulServices.
First, the operating environment
[1] Operating environment: win10 Home Edition
[2] development tools: Visual Studio 2019 16.3.10
[3] development database: MySql 8.0.0
Second, the project to build
[1], select "New"> "item" from the "File", "menu as shown:
[2] to select "ASP.NET Core Web" application template, and then click "Next." as the picture shows:
[3] Name the project .NetCoreWebApi001, and then click "Create." as the picture shows:
[4] confirm the selection in ASP.NET CORE WEB Applications dialog box .Net Coreand ASP.NET Core 3.0. Select APIa template, and then click 创建. as the picture shows:
[5] Since then, created a .NET Core WebApi.
Third, the test API
Ctrl+F5Run the application. If a message appears asking to be trusted IIS Expressdialog certificate, then select "Yes." In the "Security Warning" dialog box that appears next, select "Yes."
If shown, appear below: prove webApicreated.
Fourth, the basics
【1】appsettings.json
It is the application's configuration file, the equivalent of web.configthe configuration file.
{
"Logging": {
"LogLevel": {
"Default": "Information",
"Microsoft": "Warning",
"Microsoft.Hosting.Lifetime": "Information"
}
},
"AllowedHosts": "*",
"ConnectionStrings": { //例如：连接字符串
"Mysql": "Data Source=.;Initial Catalog=NetCoreWebApi;User Id=sa;Password=123;"
}
}
[2] Program.csClass
It is managed entry point of the application.
//文件是应用的入口， 启动后通过UseStartup<Startup>()指定下文的Startup启动文件进行启动。
public class Program
{
public static void Main(string[] args)
{
CreateHostBuilder(args).Build().Run();
}
public static IHostBuilder CreateHostBuilder(string[] args) =>
Host.CreateDefaultBuilder(args).ConfigureWebHostDefaults(webBuilder =>
{ //创建WebHostBuilder。
webBuilder.UseStartup<Startup>();
//指定启动类，用于依赖注入和中间件注册。
});
}
}[3] Startup.csClass
It is the configuration of services and applications HTTP request pipeline.
//此文件中可以以包含服务配置、定义请求处理管道的重要操作
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public IConfiguration Configuration { get; }
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseHttpsRedirection();
app.UseRouting();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
}