用如下方法获取UserId报空引用异常
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());
}
}
}