OswaldTechnologies.Multitenancy 2.0.1

ASP.NET Core Multitenancy

This library lets you add multitenancy to an ASP.Core application. You add its services to the DI container. It adds a ITenantService that provides two methods. GetCurrentTenant fetches the current tenant configuration based on the current hostname. GetTenantList returns a list of all tenants in configuration. You are able to use this service in other classes to change your database connection string.

How to use

Install the library.

Add the tenant configuration to appsettings.json.

{
    "Tenants": [
        {
            "Name": "Localhost Tenant",
            "Hostname": "localhost:44331",
            "ConnectionString": "conn1"
        },
        {
            "Name": "Test Tenant",
            "Hostname": "test.example.com",
            "ConnectionString": "conn2"
        }
    ]
}

Add the Multitenancy services to the dependency injection container.

using Multitenancy;

public void ConfigureServices(IServiceCollection services)
{
    services.AddMultitenancy();
}

Inject into DbContext to specify the database connection string for the current tenant.

public class ExampleContext : DbContext
{
    private readonly ITenantService _tenantService;

    public ExampleContext(DbContextOptions<ExampleContext> options, ITenantService tenantService)
        : base(options)
    {
        _tenantService = tenantService;
    }

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        base.OnConfiguring(optionsBuilder);

        if (!optionsBuilder.IsConfigured)
        {
            optionsBuilder.UseSqlServer(_tenantService.GetCurrentTenant().ConnectionString);
        }
    }
}