将连接字符串从Startup传递到任何其他控制器的正确方法

public void ConfigureServices(IServiceCollection services)
{
    // 其他服务的注册代码...

    string connectionString = "your_connection_string";
    services.AddSingleton(connectionString);
}

public class YourController : Controller
{
    private readonly string _connectionString;

    public YourController(string connectionString)
    {
        _connectionString = connectionString;
    }

    // 控制器的其他代码...
}