AddTransient with a dependancy

Question

Please see the code below:

var services = new ServiceCollection() .AddTransient<OtherService, OtherService>() .AddTransient<ProductService, ProductService>(sp => { Guid Id = Guid.Parse(configuration["Id"]); return new Product(Id, new OtherService()); }

This works as expected. Is it possible to do something like this:

var services = new ServiceCollection() .AddTransient<OtherService, OtherService>() .AddTransient<ProductService, ProductService>(sp => { var otherService = GetService<OtherService>(); Guid Id = Guid.Parse(configuration["Id"]); return new Product(Id, otherService); }

What is the proper way of doing this? It is a .NET Core console app.

DavidG · Accepted Answer · 2019-03-18 12:36:20Z

You are an overload of the AddTransient method which gives you the sp parameter which is an instance of IServiceProvider:

var services = new ServiceCollection() .AddTransient<OtherService, OtherService>() .AddTransient<ProductService, ProductService>(sp => { var otherService = sp.GetService<OtherService>(); //^^ <---this Guid Id = Guid.Parse(configuration["Id"]); return new Product(Id, otherService); }

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