How to load multiple config files in .Net Core

Question

I want to load multiple config files from a folder in a loop in .Net core middle ware.

I know we can load one or multiple config files by naming them like appSettings.json as mentioned here

But in my case, if I have multiple config folders, and each folder has multiple config files to be loaded initially. And If I start naming each file in each folder to load, it will be lot of lines and messier. I am looking to load all of the config folders in loop.

Please ask if need more info. Thanks

Answer 1

You can achieve this using something like Directory.EnumerateFiles and ConfigureAppConfiguration. Here's an example of what this might look like:

WebHost.CreateDefaultBuilder(args)
    .UseStartup<Startup>()
    .ConfigureAppConfiguration(configurationBuilder =>
    {
        foreach (var jsonFilename in Directory.EnumerateFiles("/path/to/jsons", "*.json", SearchOption.AllDirectories))
            configurationBuilder.AddJsonFile(jsonFilename);
    })
    .Build();

The call to ConfigureAppConfiguration allows for adding additional providers to the configuration system. Here, we're just adding all *.json files found within the /path/to/jsons directory (and children) as additional configuration sources.

Answer 2

Well, i had to figure out it with an extension method to the ConfigurationBuilder class. Hope it helps to anybody in need.

 public static IConfigurationBuilder AddMultipleJsonFiles(this IConfigurationBuilder configurationBuilder, string path, string prefix)
    {
        string[] files = System.IO.Directory.GetFiles(path, prefix + "-*.json");

        foreach (var item in files)
        {
            configurationBuilder.AddJsonFile(item);
        }
        return configurationBuilder;
    }

And also;

 var builder = new ConfigurationBuilder().AddMultipleJsonFiles(Directory.GetCurrentDirectory()+ "/Configurations/", "service");
            _configuration = builder.Build();