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Post requests do not work after deploying web application (ASP.NET Core 2.1 MVC)

Hi, I have a classified ads web application developed in ASP.NET Core 2.1, and it works well from localhost. No issue with get and post requests. But after deploying the application into server, though website is published successfully, I cannot create or edit any posts. When I do the same in localhost, the post is created, and all relevant data is stored in the database of the server for appropriate table. But when I create my ad post in my deployed website, it returns the error familiar to all of you: An error occurred while processing your request. ***Request ID: *0HN1NPJI6V70V:0000000C Development Mode Swapping to Development environment will display more detailed information about the error that occurred. But actually, no issue is seen in development mode as I explained above, I even debugged from local though there was no need to do as it worked perfectly. I contacted my hosting server, but they still cannot find solution to it. I'd like to add that I previously hosted this website in the same hosting and it was working fine, so there was no issue with version compatibility. Any good idea what may be the reason? Do I need to change configuration in web.config to something else in files folder?


1 Reply
UD UdhayaKumar Duraisamy Syncfusion Team April 10, 2024 11:46 AM UTC

When deploying an ASP.NET Core 2.1 MVC application, issues with POST requests may occur due to configuration mismatch. Therefore, be sure to check the following configuration.


  1. Routing Configuration: 

o   Verify that your routing configuration is correctly set up for handling POST requests. Ensure that the routes defined in your Startup.cs or WebApiConfig.cs align with the URLs used for posting data. 

  1. Controller Method Accessibility: 

o   Check the accessibility of your controller methods. The method responsible for handling POST requests should be public, not private. 

  1. CORS (Cross-Origin Resource Sharing): 

o   Confirm that CORS settings allow requests from your deployed website. If your API resides on a different domain than your web application, configure CORS policies accordingly. 

  1. Environment Configuration: 

o   Differences between development and production environments can lead to unexpected behavior. Ensure your application runs in the correct environment. 

o   Check the ASPNETCORE_ENVIRONMENT environment variable; it should be set to Production on your server. 

  1. Server Configuration: 

o   Configure your production web server (e.g., IIS) to handle POST requests for your application's URLs. 

o   For IIS, consider installing the .NET Core Windows Server Hosting bundle to ensure proper request handling. 

  1. Logs and Error Details: 

o   Enable detailed error information in the production environment. Sometimes generic error messages obscure the actual issue. 

o   Check the logs (stdout logs) for insights. Adjust the stdoutLogEnabled setting in your web.config to true. 

  1. Database Connection and Permissions: 

o   Ensure your deployed application has the necessary database permissions. Correctly configure connection strings and credentials for the production environment. 

  1. Middleware Order: 

o   Middleware order matters. Verify that the order of middleware components remains consistent during deployment. 

  1. .NET Core Version Compatibility: 

o   Although you mentioned no version compatibility issues, double-check that the server environment matches the .NET Core version used during development. 

  1. Review Deployment Steps: 

o   Revisit the deployment process. Small mistakes can lead to unexpected behavior. 

o   Verify that all files, including web.config, are correctly deployed. 


Remember that debugging production issues requires patience. By systematically examining these points, you'll be better equipped to identify the root cause. If you've already explored these steps, consider seeking additional assistance from the ASP.NET Core community or forums.


Source Links for Reference:

1. https://stackoverflow.com/questions/46178241/post-method-is-not-working-in-asp-net-core

2. https://devcodef1.com/news/1157177/deploying-asp-net-core-2-1-mvc-app-post-requests-issue

3. https://stackoverflow.com/questions/39785773/asp-net-core-app-deployed-on-iis-meets-500-internal-server-error?rq=1

4. https://stackoverflow.com/questions/60054515/get-500-error-when-deploy-a-net-core-web-app-to-iis-server-by-azure-pipelines

5. https://stackoverflow.com/questions/45110222/net-core-not-routing-to-post-method

6. https://stackoverflow.com/questions/67550721/unable-to-make-http-post-request-to-net-core-mvc

7. https://github.com/dotnet/aspnetcore/issues/24462


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