Calling Node.js from ASP.NET Core

First published on MSDN on Oct 23, 2017

Here are the steps to invoke Node.js from ASP.NET Core Website

1. 
   Add below line in the ConfiguraServices() in Startup.cs
   
   
   
   
   

   
   public
   
   
   void
   
   
   ConfigureServices(IServiceCollection services)
   

   
   
   
   

   
   {
   

   
   
   
   

   
   services.AddMvc();
   

   
   
   
   

   
   services.AddNodeServices();
   

   
   
   
   

   
   }
   

   
   

   
   
   
   

   
   






2. 
   Add constructor in the Controller
   

   
   public
   
   
   class
   
   
   HomeController : Controller
   

   
   
   
   

   
   {
   

   
   
   
   

   
   INodeServices
   
   
   nodeServices;
   

   
   
   
   

   
   public
   
   
   HomeController(INodeServices nodeServices)
   

   
   
   
   

   
   {
   

   
   
   
   

   
   this.nodeServices =
   
   
   nodeServices;
   

   
   
   
   

   
   }
   

   
   






3. 
   Call NodeServices as shown below
   

   
   public
   
   
   async  Task<IActionResult>
   
   
   About()
   

   
   
   
   

   
   {
   

   
   
   
   

   
   var
   
   
   msg = await
   
   
   nodeServices.InvokeAsync<string>(“./hello.js”,
   
   
   1);
   

   
   
   
   

   
   

   
   
   
   

   
   ViewData[“Message”] = msg;
   

   
   
   
   

   
   return View();
   

   
   
   
   

   
   }
   

   
   






4. 
   Add following code to js file
   

   
   module.exports = function (callback)
   

   
   
   
   

   
   {
   

   
   
   
   

   
   var
   
   
   message = ‘Hello
   
   
   world’;
   

   
   
   
   

   
   callback(null, message);
   

   
   
   
   

   
   };