Azure Functions Database Connection String

Question

How do I add or access an app.config file in Azure functions to add a database connection string?

If you\'re not supposed to add an app.config

Answer 1

Addition to the answer from @ToddDeLand.

With a local.settings.json like this:

{
  "IsEncrypted": false,
  "Values": {
    "AzureWebJobsStorage": "UseDevelopmentStorage=true;",
    "AzureWebJobsDashboard": ""
  },
  "ConnectionStrings": {
    "MyConnectionString": "[YourConnectionStringHere]"
  }
}

You can then access your connection string like this, no NuGets needed.

var connectionString = Environment.GetEnvironmentVariable("ConnectionStrings:MyConnectionString");

Microsoft recommends this approach here:

https://docs.microsoft.com/en-us/azure/azure-functions/functions-dotnet-class-library#environment-variables

If you add the connection string to values:

{
  "IsEncrypted": false,
  "Values": {
    "AzureWebJobsStorage": "UseDevelopmentStorage=true;",
    "AzureWebJobsDashboard": "",
    "MyConnectionString": "[YourConnectionStringHere]"
  }
}

You can access your connection string like this:

var connectionString = Environment.GetEnvironmentVariable("MyConnectionString");

Sources:

https://stackoverflow.com/a/52219491/3850405

https://github.com/Azure/Azure-Functions/issues/717#issuecomment-400098791