如何在.NET Core中读取连接字符串？

您可以使用GetConnectionString扩展方法执行此操作：

string conString = Microsoft   .Extensions   .Configuration   .ConfigurationExtensions   .GetConnectionString(this.Configuration, "DefaultConnection");System.Console.WriteLine(conString);

或具有DI的结构化类：

public class SmtpConfig{    public string Server { get; set; }    public string User { get; set; }    public string Pass { get; set; }    public int Port { get; set; }}

启动：

public IConfigurationRoot Configuration { get; }// This method gets called by the runtime. Use this method to add services to the container.public void ConfigureServices(IServiceCollection services){    // http://developer.telerik.com/featured/new-configuration-model-asp-net-core/    // services.Configure<SmtpConfig>(Configuration.GetSection("Smtp"));    Microsoft.Extensions.DependencyInjection.OptionsConfigurationServiceCollectionExtensions.Configure<SmtpConfig>(services, Configuration.GetSection("Smtp"));

然后在家庭控制器中：

public class HomeController : Controller{    public SmtpConfig SmtpConfig { get; }    public HomeController(Microsoft.Extensions.Options.IOptions<SmtpConfig> smtpConfig)    {        SmtpConfig = smtpConfig.Value;    } //Action Controller    public IActionResult Index()    {        System.Console.WriteLine(SmtpConfig);        return View();    }

在appsettings.json中具有以下内容：

"ConnectionStrings": {"DefaultConnection": "Server=(localdb)\mssqllocaldb;Database=aspnet-WebApplica71d622;Trusted_Connection=True;MultipleActiveResultSets=true"},"Smtp": {    "Server": "0.0.0.1",    "User": "user@company.com",    "Pass": "123456789",    "Port": "25"  }