.net core和angular2之前端篇—1

　　2016-10-20更新

　　今天的这篇文章还是一篇“Hello World”，只不过开发环境有所改变——Visual Studio Code+Angular2+Webapck，也算是正式的开篇了。

　　一、新建一个文件夹作为此次Demo的根目录，这里为：“F:Visual Studio Codeapp1”，并在“命令提示符中打开”，键入：dotnet new -t web  如下图：

　　说明：这不是一个空项目，作为一个demo，太罗嗦了！但是还不清楚如何如何创建空项目，如果有知道的，请不吝赐教！，这里对“Startup.cs”中的带代码做如下调整：

// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
        {
            loggerFactory.AddConsole(Configuration.GetSection("Logging"));
            loggerFactory.AddDebug();

            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
                app.UseDatabaseErrorPage();
                app.UseBrowserLink();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
            }
            
            app.Use(async (context, next) =>
            {
                await next();

                if (context.Response.StatusCode == 404
                    && !System.IO.Path.HasExtension(context.Request.Path.Value))
                {
                    context.Request.Path = "/index.html";
                    await next();
                }
            });

            app.UseStaticFiles();

            app.UseIdentity();

            // Add external authentication middleware below. To configure them please see https://go.microsoft.com/fwlink/?LinkID=532715

            app.UseMvc();
        }

　　然后在命令行键入：dotnet restore  如下图

　　二、修改package.json，代码如下：

{
  "name": "webapplication",
  "version": "0.0.0",
  "private": true,
   "scripts": {
    "postinstall": "typings install",
    "build": "webpack",
    "start": "webpack-dev-server"
  },
  "license": "ISC",
  "dependencies": {
    "@angular/common": "2.1.0",
    "@angular/compiler": "2.1.0",
    "@angular/core": "2.1.0",
  
    "@angular/platform-browser": "2.1.0",
    "@angular/platform-browser-dynamic": "2.1.0",
  
    "reflect-metadata": "^0.1.3",
    "rxjs": "5.0.0-beta.12",
    "zone.js": "^0.6.23"
  },
  "devDependencies": {
    "angular2-template-loader": "^0.4.0",
    "awesome-typescript-loader": "^2.2.4",
    "typescript": "^2.0.3",
    "typings": "^1.3.2",
    "webpack": "^1.13.0",
    "webpack-dev-server": "^1.14.1"
  }
}

 　　三、在根目录下依次新建tsconfig.json、typings.json、webpack.config.js三个文件，代码如下：

{
  "compilerOptions": {
    "target": "es5",
    "module": "commonjs",
    "moduleResolution": "node",
    "sourceMap": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "removeComments": false,
    "noImplicitAny": false
  }
}

{
  "globalDependencies": {
    "es6-shim": "github:DefinitelyTyped/DefinitelyTyped/es6-shim/es6-shim.d.ts#7de6c3dd94feaeb21f20054b9f30d5dabc5efabd"
  }
}

var webpack = require("webpack");

module.exports = {
  entry: {
    "vendor": "./typescript/vendor.ts",
    "app": "./typescript/main.ts"
  },
  output: {
    path: __dirname,
    filename: "./wwwroot/js/[name].bundle.js"
  },
  resolve: {
    extensions: ['', '.ts', '.js']
  },
  devtool: 'source-map',
  module: {
    loaders: [
      {
        test: /.ts/,
        loaders: ['awesome-typescript-loader', 'angular2-template-loader'],
        exclude: /node_modules/
      }
    ]
  },
  plugins: [
    new webpack.optimize.CommonsChunkPlugin({
      name: ['app', 'vendor']
    })
  ]
}

　　四、在根目录下新建目录“typescript”（用户存放ts文件），并依次新建app.component.ts、app.module.ts、main.ts和vendor.ts四个个文件，代码如下：

import {Component} from '@angular/core';

@Component({
    selector: 'my-app',
    template: `<h1>My First Angular 2 App</h1>`
})

export class AppComponent {}

import {NgModule}      from '@angular/core';
import {BrowserModule} from '@angular/platform-browser';

import {AppComponent}  from './app.component';

@NgModule({
    imports:        [BrowserModule],
    declarations:   [AppComponent],
    bootstrap:      [AppComponent]
})

export class AppModule {}

import {platformBrowserDynamic} from '@angular/platform-browser-dynamic';
import {AppModule} from './app.module'

platformBrowserDynamic().bootstrapModule(AppModule);

// Angular
import '@angular/platform-browser';
import '@angular/platform-browser-dynamic';
import '@angular/core';
import '@angular/common';

// RxJS
import 'reflect-metadata';
import 'rxjs';
import 'zone.js/dist/zone';

// Other vendors for example jQuery, Lodash or Bootstrap
// You can import js, ts, css, sass, ...

　　五、在命令行中键入“npm install”,安装文件包（安装了好多），如下图：

　　六、在命令行键入webpack 执行webpack任务，如下图：

　　七、在wwwroot目录下新建index.html，代码如下：

<!DOCTYPE html>
<html>
  <head>
    <base href="/">
    <title>Angular With Webpack</title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
  </head>
  <body>
    <my-app>Loading...</my-app>
  <script type="text/javascript" src="js/vendor.bundle.js"></script>
  <script type="text/javascript" src="js/app.bundle.js"></script></body>
</html>

　　八、在命令行键入dotnet run,如下图：

 

　　九、最后在浏览器键入：http://localhost:5000/  如下图：

　　至此又一个Hello World结束了，哈哈！

　　更新：2016-10-17

　　今天在公司测试的时候，发现了一个问题，Hello World出不来，再次说明一下，回去再看看是什么问题！惭愧啊！