Create Sln File With Multiple Projects

Create Sln File With Multiple Projects

In this article we will learn how to create a .net core project with a Solution (sln file) that contains multiple projects. I know most you guys use visual studio for c# related stuff, but it would be benificial for person who likes to switch with vs code ocassionally, like me or who use linux and forced to use .net cli. Although if you are a new developer and have windows operating system, I will recommend visual studio, because it is the best possible IDE for c# development.

Our project structure will be like this.

book_store_multiple_project_structure

Book-Store-Spa-Backend is our root folder, inside it we have a sln file and 3 different projects.

  1. BookStore.Api (UI layer)

  2. BookStore.Data (Data layer)

  3. BookStore.Test (Unit Testing project)

Create a sln file named inside a folder Book-Store-Spa-Backend, it is also our solution name.

dotnet new sln -o Book-Store-Spa-Backend

This command will create a folder name ‘Book-Store-Spa-Backend’, inside that folder it will create a sln file with same name. We need to create more project , in order to achieve that we need to move into ‘Book-Store-Spa-Backend’, so in your terminal write this command.

cd Book-store-spa-backend

Now we are inside “Book-store-spa-backend” directory.

Create new a web api project. It will be our UI layer.

dotnet new webapi -o BookStore.Api

Let’s create another project (class library), it will be our DataAccess layer, where we will write our database logic.

dotnet new classlib -o BookStore.Data

Let’s create another project (xunit project for unit testing).

dotnet new xunit -o BookStore.Test

Now we need to create a add these 3 projects in our solution. Write the following command.

dotnet sln Book-Store-Spa-Backend.sln add .\BookStore.Api\ .\BookStore.Data\ .\BookStore.Test\ add .\BookStore.Api\ .\BookStore.Data\ .\BookStore.Test\

I know you are thinking 😖how to remember these file names .

hand_hurt

Lets make it simple just type dotnet sln Book-Store-Spa-Backend.sln after that press tab button, it will autocomplete the name of project, if it is not the right one then press it again, until you find the right one. and its done.

done

Type " cd.. " in terminal. Because we need to exit from this directory,

cd..

Now following command will open our project in vs code.

code  Book-Store-Spa-Backend

final structure

Let’s make it feel more like visual studio, this step is completely optional. Install the following vs code extension.

Last thing we need to do here, we need to add reference of BookStore.Data to BookStore.Api project.

dotnet add .\BookStore.Api\BookStore.Api.csproj
reference
.\BookStore.Data\BookStore.Data.csprojMvcBlogDemoData\MvcBlogDemoData.csproj

And add reference of BookStore.Data and BookStore.Api to BookStore.Test

dotnet add .\BookStore.Test\BookStore.Test.csproj reference .\BookStore.Data\BookStore.Data.csproj
dotnet add .\BookStore.Test\BookStore.Test.csproj reference .\BookStore.API\BookStore.Api.csproj

Canonical link

dotnet