Developing an ASP. NET Core Webapi with visual Studio Code learning Notes (i)--start

This document documents the entire process of installing the visual Studio Code development tools, the. Net Core 1.0 SDK, and the development of a simple Web-demo Web site in a Windows environment.

First, install visual Studio Code

Installation file: VS Code, the current version is 1.3.

It is recommended to install the latest version, because the debug plugin is included to support breakpoint debugging on vs code.

Second, install the. Net Core 1.0 SDK

installation files:. Net Core SDK

Third, create a. Net Core application

1. Open the cmd window and create a directory as the project directory

2. Enter the directory and use the following three commands to initialize a. Net core application and run

dotnet NewDotNet Restoredotnet Run

The results of the operation are as follows. When Hello world! is present, the application has been initialized successfully.

Iv. writing a simple Web-demo program using visual Studio code

1. Use vs code to open the folder created in the previous two steps

2. Open the Project.json file and modify the contents to the following code snippet

 
 
 1 {
 2   "version": "1.0.0-*",
 3   "buildOptions": {
 4     "debugType": "portable",
 5     "emitEntryPoint": true
 6   },
 7   "dependencies": {
 8     "Microsoft.NETCore.App": {
 9       "type": "platform",
10       "version": "1.0.0"
11     },
12     "Microsoft.AspNetCore.Server.Kestrel": "1.0.0"
13   },
14   "frameworks": {
15     "netcoreapp1.0": {
16       "imports": "dnxcore50"
17     }
18   }
19 }

3. Execute the dotnet Restore command in the cmd window to update the NuGet package

4. Create the Startup.cs file and write the following:

 
 1 using Microsoft.AspNetCore.Builder;
 2 using Microsoft.AspNetCore.Hosting;
 3 using Microsoft.AspNetCore.Http;
 4 
 5 namespace WebApiFrame
 6 {
 7     public class Startup
 8     {
 9         public void Configure(IApplicationBuilder app)
10         {
11             app.Run(context =>
12             {
13                 return context.Response.WriteAsync("Hello World!");
14             });
15         }
16     }
17 }

5. Open the Program.cs file and modify the contents to the following code snippet

 
using Microsoft.AspNetCore.Hosting;

namespace WebApiFrame
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var host = new WebHostBuilder()
                .UseKestrel()
                .UseStartup<Startup>()
                .Build();

            host.Run();
        }
    }
}

Five, run the debug Web-demo application

1. Switch to the Debug window and initialize the Debug configuration file

Initializing the Launch.json configuration file

Modify the contents of a Launch.json file

Initializing the Tasks.json configuration file

Initial start debugging, need to configure task run program, generate Tasks.json configuration file

Six, start debugging

Start debugging again, the program will run normally, you can see the log output in the Debug console

Access the default path: http://localhost:5000, you can see the page display Hello world!

To this, a simple Web-demo application is completed.

Explain:

1. The Microsoft.AspNetCore.Server.Kestrel package encapsulates a lightweight HTTP Server called Kestrel, which enables the Web application to run out of IIS for deployment.

Developing an ASP. NET Core Webapi with visual Studio Code learning Notes (i)--start