CODEWITHSUNDEEP
c#asp.net-web-api.net-6.0appsettings
user584018
user584018

Reputation: 11304

Value is returned as null while reading appsetting key as environment variable

I have an ASP.NET Core 6 Web API and I am adding a key in appsettings.json file and trying to read this as environment variable:

var x = Environment.GetEnvironmentVariable("FILE_STORAGE")?.ToUpper();

The value is returned as null.

I have added below code in the program.cs file:

var builder = WebApplication.CreateBuilder(args);

var configuration = builder.Configuration;
configuration
     .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
     .AddEnvironmentVariables();

appsettings.json:

{
    "FILE_STORAGE": "Azure"
}

I know I can read through IConfiguration (_configuration["FILE_STORAGE"]), but can I read like Environment.GetEnvironmentVariable("FILE_STORAGE")?

Upvotes: 2

Views: 1082

Answers (1)

Roman Marusyk
Roman Marusyk

Reputation: 24569

Environment.GetEnvironmentVariable reads the Environment Variable, not the value from settings files, such as appsettings.json!

enter image description here

You should use _configuration["FILE_STORAGE"], then it will first try to read your environment variable FILE_STORAGE, if there is no value - read from appsettings.json

I'd recommend var value = _configuration.GetValue<string>("FILE_STORAGE");

See Configuration in ASP.NET Core

Upvotes: 3

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