cannot read values for few keys from local.settings.json file-CodePudding

I am unable to read the few of the keys from local.settings.json file. Below is the file content.

{
  "IsEncrypted": false,
  "Values": {
    "KeyVaultUrl": "https://mykeyvault.azure.net/",
    "SecretKey": "myconnectionstring",
    "AzureWebJobsStorage": "UseDevelopmentStorage=true",
    "FUNCTIONS_WORKER_RUNTIME": "dotnet"
  }
}

I used the below code to read these values

var keyVaultUrl = Environment.GetEnvironmentVariable("KeyVaultUrl"); // returns null
var secretKey = Environment.GetEnvironmentVariable("SecretKey"); // returns null
var sample = Environment.GetEnvironmentVariable("AzureWebJobsStorage"); // returns "UseDevelopmentStorage=true"

I am not sure why it returns null for the key I have added. I have set Copy Always in Copy to Output Directory and Build Action to None.

Please assist.

CodePudding user response：

An environment variable is a variable whose value is set outside the program, typically through functionality built into the operating system!

Your data in appsettings is just key-value pairs of configuration settings for your application (from name - appsettings).

To access data in your appsettings you need to inject IConfiguration to your service (or controller or whatever)

private readonly IConfiguration _configuration;

public ServiceConstructor(public IConfiguration)
    => _configuration = configuration;

and then you can read values from there like this:

_configuration["IsEncrypted"]

and

_configuration["Values:KeyVaultUrl"]

CodePudding user response：

Values you are trying to read, are not written in environment variables. To use config files, use IConfiguration. It can contain environment variables, multiple config files and much more.

It depends on type of your application, if you are using simple console application without hosts and builders, use this, but if you are using some kind of framework use this approach.