public class BaseController : Controller
{
protected SiteContext db = new SiteContext();
protected Guid userId;
public BaseController()
{
userId = Guid.Parse(User.Identity.GetUserId());
}
}
由于Controller未初始化完成，User为空，重写初始化方法，在初始化(base.Initialize(requestContext);)完成的时候再去获取User即可
解决方法：
public class BaseController : Controller { protected SiteContext db = new SiteContext(); protected Guid userId; protected override void Initialize(System.Web.Routing.RequestContext requestContext) { base.Initialize(requestContext); if (User.Identity.IsAuthenticated) { userId =Guid.Parse(User.Identity.GetUserId()); } } }
MVC5 Controller构造方法获取User为空解决方法
原文：http://www.cnblogs.com/hgmyz/p/7753449.html