How to reference another value within the same appsettings.json file?

Question

I need database connection string in two places in appsettings.json.

Is it possible to introduce common variable or json-path related references into json file to avoid

Answer 1

I've created a nuget package exactly for this! Check it out here: https://www.nuget.org/packages/TemplateFormattedConfiguration/

In your example you should do this:

{
...
    "ConnectionStrings": {
"Default": "Host=localhost;Database=db;Port=5432;Username=postgres;Password=postgres"
  },
  "Nlog": {
    "targets": {
      "database": {
        "type": "Database",
        "dbProvider": "Npgsql.NpgsqlConnection, Npgsql",
        "connectionString": "{ConnectionStrings:Default}",
...
      }
    }
...
}

And in your Startup.cs (or Program.cs) you'll add this:

        configuration.EnableTemplatedConfiguration();