Getting Started With ASP.NET CORE 1.0

In this article, I will explain how to install a .NET Core tools preview for Visual Studio and how to print “Hello World” in the latest ASP.NET Core 1.0.

Introduction
 
In this article, I will explain how to install .NET Core tools preview for Visual Studio and how to print “Hello World” in the latest ASP.NET Core 1.0.
 
Step 1
 
First download Visual Studio 2015 with Update 3 through the link click here.
 
Step 2
 
Go to Install .NET Core tools preview for Visual Studio. This .NET Core tools adds support for .NET Core projects in Visual Studio 2015.

Install DotNet Core
Step 3
 
This is really interesting. Open Visual Studio 2015 and create new Project.

Open Templates – > Visual C# -> Click .NET Core Category and you can see “ASP.NET Core Web Application” template.

DotnetCore Template in VS 2015

Step 4 
 
Select Empty Templates ( based on your requirement ) in ASP.NET Core Templates Category if you are going to host the app in Microsoft Azure Service and check in the “Host in the cloud option”.

DotNet Core Empty Page

Step 5
 
Open “Startup.cs” class in “HelloWorldDotnetCore” project folder. 



Step 6
 
We are creating mini middle ware Application, using lambda expression in “app.Run”. This piece of code is creating “Hello World”. 
 
C# Code
  1. using System;  
  2. using System.Collections.Generic;  
  3. using System.Linq;  
  4. using System.Threading.Tasks;  
  5. using Microsoft.AspNetCore.Builder;  
  6. using Microsoft.AspNetCore.Hosting;  
  7. using Microsoft.AspNetCore.Http;  
  8. using Microsoft.Extensions.DependencyInjection;  
  9. using Microsoft.Extensions.Logging;  
  10.   
  11. namespace HelloWorldDotnetCore  
  12. {  
  13.     public class Startup  
  14.     {  
  15.         // This method gets called by the runtime. Use this method to add services to the container.  
  16.         // For more information on how to configure your application, visit http://go.microsoft.com/fwlink/?LinkID=398940  
  17.         public void ConfigureServices(IServiceCollection services)  
  18.         {  
  19.         }  
  20.   
  21.         // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.  
  22.         public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)  
  23.         {  
  24.             loggerFactory.AddConsole();  
  25.   
  26.             if (env.IsDevelopment())  
  27.             {  
  28.                 app.UseDeveloperExceptionPage();  
  29.             }  
  30.            app.Run(async (context) =>  
  31.             {  
  32.                 await context.Response.WriteAsync(" Hello World! ");  
  33.             });  
  34.              
  35.         }  
  36.     }  
  37. }  
Output 1
 
 
Step 7
 
“app.run” doesn’t work in .NET Core followed by using “app.Use”. It will pass two parameters and add the next middleware content In .NET Core. 
 
C# Code
  1. using System;  
  2. using System.Collections.Generic;  
  3. using System.Linq;  
  4. using System.Threading.Tasks;  
  5. using Microsoft.AspNetCore.Builder;  
  6. using Microsoft.AspNetCore.Hosting;  
  7. using Microsoft.AspNetCore.Http;  
  8. using Microsoft.Extensions.DependencyInjection;  
  9. using Microsoft.Extensions.Logging;  
  10.   
  11. namespace HelloWorldDotnetCore  
  12. {  
  13.     public class Startup  
  14.     {  
  15.         // This method gets called by the runtime. Use this method to add services to the container.  
  16.         // For more information on how to configure your application, visit http://go.microsoft.com/fwlink/?LinkID=398940  
  17.         public void ConfigureServices(IServiceCollection services)  
  18.         {  
  19.         }  
  20.   
  21.         // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.  
  22.         public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)  
  23.         {  
  24.             loggerFactory.AddConsole();  
  25.   
  26.             if (env.IsDevelopment())  
  27.             {  
  28.                 app.UseDeveloperExceptionPage();  
  29.             }  
  30.             app.Use(async (context, next) =>  
  31.             {  
  32.                 await context.Response.WriteAsync("Hello World!!");  
  33.                 await next();  
  34.             });  
  35.   
  36.             app.Run(async (context) =>  
  37.             {  
  38.                 await context.Response.WriteAsync(" Welcome to Dotnet Core ");  
  39.             });  
  40.              
  41.         }  
  42.     }  
  43. }  
Output 2
 
 
Reference
Conclusion
 
We learned how to Install .NET Core tools preview for Visual Studio and how to print “Hello World” in the latest ASP.NET Core 1.0.