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From what I understand .NetCore no longer uses/needs web.config -- opting instead for appsettings.json.

I have a .NetCore WebAPI that I am trying to host in an Azure WebApp. I've published the API to the WebApp but I keep getting a 500 error. Looking in the Application logs, I can see that the error is:

IIS was not able to access the web.config file for the web site or application.

I'm confused. If .NetCore uses appsettings.json instead of web.config and Azure won't work without web.config, how is one supposed to host a .NetCore app in Azure?

UPDATE

I now realize that this has nothing to do with web.config thanks to @joey-cai pointing me in the right direction.

It appears that Azure did not like my attempt to use Azure Active Directory Authentication in my Connection String. I changed my connection string to simply use SQL Authentication and everything worked. So I guess my question now is, how do I use AAD Authentication for my connection string rather than SQL Authentication.

This SO thread seems to indicate that my connection string was indeed set up correctly for AAD authentication, but I was getting the error:

Keyword not supported: 'authentication'

whenever I used the connection string like so:

Server=tcp:dbname.database.windows.net,1433;Initial Catalog=dbnamesqldb;Persist Security Info=False;User ID={your_username};Password={your_password};MultipleActiveResultSets=False;Encrypt=True;TrustServerCertificate=False;Authentication="Active Directory Password";

Since the question has now changed, I'm going to create a new post with the new question.

RHarris
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1 Answers1

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does this mean I must have we.config? If so, can it just be an empty file?

When you deploy the .net core project to Azure, you could go to https://xxxxx.scm.azurewebsites.net and click Debug console> CMD > site > wwwroot > web.config. The web.config will be there.

Try to delete the site in azure and recreat the site in azure. Also, try to run the application that you are deploying by running dotnet MyApp.dll and making sure that works. You need more details as to why it’s having an application issue. This might help. Also consider testing using a self contained application. Also try installing the asp.net core extension on the azure app service.

For more details, you could refer to Deploy ASP.NET Core apps to Azure App Service.

Joey Cai
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  • Running the app like you said `dotnet app.dll` shows me that it is launching but is using my development setting of `localhost:5000`. I'm not sure where it is pulling that value from -- how do I fix that? – RHarris Feb 04 '19 at 13:12
  • So looking in my logs, I'm getting the following error: `Keyword not supported: 'authentication'.` I found [this SO post](https://stackoverflow.com/questions/34943369/azure-active-directory-connection-string) that seems to indicate that .Net Framework 4.6 or later must be installed -- but I don't think I have any control over what is installed with a Web App. I'm trying to use `Authentication="Active Directory Password"` in my connection string – RHarris Feb 04 '19 at 14:13
  • Thanks, you were correct that web.config is actually there (even though it is not part of my project). Don't know why I was seeing that error, but you got me digging in the right places to find the actual error and a partial resolution -- Thanks. – RHarris Feb 04 '19 at 14:50