default asp.net core web app template fails to run [Answered]RSS

• • Reply
  phillips1021

  Member

  1 Points

  7 Posts

  default asp.net core web app template fails to run

  Oct 22, 2017 12:33 PM|phillips1021|LINK

  Using asp.net core 2.0 with Visual Studio Community 2017 for Mac

  Created a brand new asp.net core web app project using the provided template

  Click run project 

  Project builds successfully 

  Browser opens and shows message:  Safari Cannot Open The Page - Safari cannot open the page localhost:5001 because the server unexpectedly dropped the connection

  In Visual Studio Community IDE the Program.cs file loads with   BuildWebHost(args).Run(); highlighted

  Click continue button in IDE brings up a Program Report for dot net - dot net quit unexpectedly 

  Note that the asp.net core empty template runs without an issue

• • Reply
  phillips1021

  Member

  1 Points

  7 Posts

  Re: default asp.net core web app template fails to run

  Oct 22, 2017 12:54 PM|phillips1021|LINK

  Think I found the problem

  If I run dotnet build and then dotnet run from the command line I get a lot more detail - the error I see then is that http://localhost:5001 is already in use.

  So I added  UseUrls("http://localhost:5002/") to Program.cs

  Now I can execute dotnet build and dotnet run from the command line and then in my web browser go to http://localhost:5002 to see the web app

  NOTE that Visual Studio Community still tries to open the web app at http://localhost:5001 when I run the web app from within Visual Studio

• • Reply
  phillips1021

  Member

  1 Points

  7 Posts

  Re: default asp.net core web app template fails to run

  Oct 22, 2017 01:06 PM|phillips1021|LINK

  Here is how you can set the port for running locally

  Under the properties folder is a file launchSettings.json

  In that file is the applicationUrl value for the Development environment - http://localhost:5001

  You can change that to what you need for your environment

  Close the project and reopen it - Now Visual Studio should have your web browser use the port you specified when loading the page when you run the project

• • Reply
  AngelinaJoli...

  Contributor

  5200 Points

  2307 Posts

  Re: default asp.net core web app template fails to run

  Oct 23, 2017 09:53 AM|AngelinaJolie|LINK

  Hi phillips,

  Good Day!

  Yes, and I tested a working example on local :

  first step:

  Open launchSettings.json and change http://localhost:5000 port to http://localhost:5002 port

  {
    "iisSettings": {
      "windowsAuthentication": false,
      "anonymousAuthentication": true,
      "iisExpress": {
        "applicationUrl": "http://localhost:36133/",
        "sslPort": 0
      }
    },
    "profiles": {
      "IIS Express": {
        "commandName": "IISExpress",
        "launchBrowser": true,
        "environmentVariables": {
          "ASPNETCORE_ENVIRONMENT": "Development"
        }
      },
      "ContosoUniversity": {
        "commandName": "Project",
        "launchBrowser": true,
        "launchUrl": "http://localhost:5002",
        "environmentVariables": {
          "ASPNETCORE_ENVIRONMENT": "Development"
        }
      }
    }
  }

  Second step:

  Open Program file and add   .UseUrls("http://localhost:5002")
  

   public class Program
      {
          public static void Main(string[] args)
          {
  
              var host = new WebHostBuilder()
                  .UseKestrel()
                  .UseUrls("http://localhost:5002")
                      .UseContentRoot(Directory.GetCurrentDirectory())
                      .UseIISIntegration()
                      .UseStartup<Startup>()
                      .Build();
  
                  host.Run();
             
          }

  With regards, Angelina Jolie

  MSDN Community Support
  Please remember to click "Mark as Answer" the responses that resolved your issue.
  If you have any compliments or complaints to MSDN Support, feel free to contact MSDNFSF@microsoft.com.
  
• • Reply
  TonyHelp

  Member

  198 Points

  158 Posts

  Re: default asp.net core web app template fails to run

  Oct 30, 2017 07:01 AM|TonyHelp|LINK

  Hi phillips,

  Thanks for sharing the solution for the issues while developing on Mac. I would suggest you mark your reply as answer, and then others who run into the same issue would find the solution easily.

  Regards,

  Tony

  Mark The Reply As Answer If It Resolves Your Issue.