如何將 AddDbContext 移動到服務擴展 static class

Question

我在 .NET 6 中的Program.cs中有這段代碼。

var idConnectionString = builder.Configuration.GetConnectionString("IdentityConnection");

builder.Services.AddDbContext<ApplicationDbContext>(options => options.UseSqlServer(idConnectionString));

var abcConnectionString = builder.Configuration.GetConnectionString("abcConnection");
builder.Services.RegisterSqlServer<AbcDbContext>(abcConnectionString);

var xyzConnectionString = builder.Configuration.GetConnectionString("xyzConnection");
builder.Services.AddDbContext<XzyDbContext>(x => x.UseSqlServer(xyzConnectionString));

如何將這些代碼移動到我的服務擴展 class 中？

public static class ServiceExtensions
{     
    public static IServiceCollection AddDbContextServices(this IServiceCollection services)
    {
        ??

        return services;
    }
}

Answer 1

創建一個 static class DbContext 如下：

 public static class DbContext
 {
    public static IServiceCollection AddCustomizedDbContext(this IServiceCollection services, IConfiguration configuration)
    {
        var connectionString = configuration.GetSection("ConnectionStrings:Connectionstring").Value;
        var migrationsAssembly = "NameSpace";

        services.AddDbContext<DBContext>(options =>
            options.UseSqlServer(connectionString, sql => sql.MigrationsAssembly(migrationsAssembly))
        );

        return services;
    }
}

然后在啟動時注冊它：

services.AddCustomizedDbContext(configuration);