Global Variables in ASP.Net Core 2

Question

I am developing a web application in ASP.NET Core and currently have a large set of keys, such as stripe account keys. Instead of having them spread throughout the project i

Answer 1

I often do this kind of thing with connection strings and other global constants. First create a class for those variables that you need. In my project it is MDUOptions but whatever you want.

public class MDUOptions
{
    public string mduConnectionString { get; set; }
    public string secondaryConnectionString { get; set; }
}

Now in your Startup.cs ConfigureServices method:

Action mduOptions = (opt =>
{
    opt.mduConnectionString = Configuration["ConnectionStrings:mduConnection"];
});
services.Configure(mduOptions);
services.AddSingleton(resolver => resolver.GetRequiredService>().Value);

Now you use DI to access it in code:

public class PropertySalesRepository : IPropertySalesRepository
{
    private static string _mduDb;

    public PropertySalesRepository(MDUOptions options)
    {
        _mduDb = options.mduConnectionString;
    }
    ....
}

In my case the only property I wanted was the string but I could have used the entire options class.