Asp.Net Core 2 Web API shows HTTP 404 error on Visual Studio 2017, Windows 10

Question

I have just pulled one Asp.Net Core 2 Web API project from GitHub, and when I try to run the application via IISExpress it always throws HTTP 404 error. The build is always successful. I am running it from Visual Studio 2017 on my Windows machine.

Things I have tried:

Tried different browsers
Checked my proxy settings

Used .UseIISIntegration() in my Program.cs file

public static IWebHost BuildWebHost(string[] args) =>
    WebHost.CreateDefaultBuilder(args)
    .UseStartup<Startup>()
    .UseIISIntegration()
    .Build();

Deleted the .vs folder from the app directory and tried again

Nothing seems to be working. Has anyone else faced this issue?

Sibeesh Venu · Accepted Answer · 2018-04-01 14:26:54Z

1

Finally, I found that this was the issue with Asp.Net code 2. When I run the application, it is actually loading the URL as localhost:49515 as a default launching URL and it was returning HTTP 404. This post helped me find the actual issue. When I try with any default API link localhost:49515/api/values, it is working fine.

You can always set the custom launch URL by following these steps.

Right-click on the project, and click on properties
Got to Debug
Check the Launch browser checkbox and set the URL there (http://localhost:49515/api/values)

Now run your application, it will open the new URL always.

edited Apr 1, 2018 at 14:26

answered Apr 1, 2018 at 14:17

Sibeesh Venu

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