小编Mat*_*att的帖子

检测reCaptcha v2是否未加载的最佳方法是什么？我想提醒用户何时需要使用验证码继续,但无法加载.

我正在尝试运行本地节点服务器,但无论出于何种原因localhost:3000都不起作用.错误页面状态This webpage is not available ERR_CONNECTION_CLOSED 然而,127.0.0.1:3000确实有效.我试过更改我的主机文件,但无济于事.有谁知道是什么导致了这个问题？

Chrome版本为46.0.2490.80米

我目前正在Visual Studio Express 2013 for Web中构建一个网站,我正在使用默认的成员资格功能供用户注册.但是,当我在localhost上打开网站并尝试注册用户时,我收到以下错误:

An exception of type 'System.MissingMethodException' occurred in mscorlib.dll 
but was not handled in user code

Additional information: Method not found: 'System.Threading.Tasks.Task`1<!!0>
System.Data.Entity.QueryableExtensions.FirstOrDefaultAsync(System.Linq.IQueryable`1<!!0>,
System.Linq.Expressions.Expression`1<System.Func`2<!!0,Boolean>>)'.

这是我浏览器的堆栈跟踪:

[MissingMethodException: Method not found: 'System.Threading.Tasks.Task`1<!!0> System.Data.Entity.QueryableExtensions.FirstOrDefaultAsync(System.Linq.IQueryable`1<!!0>, System.Linq.Expressions.Expression`1<System.Func`2<!!0,Boolean>>)'.]
   Microsoft.AspNet.Identity.EntityFramework.UserStore`6.GetUserAggregateAsync(Expression`1 filter) +0
   Microsoft.AspNet.Identity.EntityFramework.UserStore`6.FindByNameAsync(String userName) +1071
   Microsoft.AspNet.Identity.UserManager`2.FindByNameAsync(String userName) +177
   Microsoft.AspNet.Identity.<ValidateUserName>d__4.MoveNext() +803
   System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +93
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +52
   System.Runtime.CompilerServices.TaskAwaiter.GetResult() +21
   Microsoft.AspNet.Identity.<ValidateAsync>d__0.MoveNext() +468
   System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +93
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +52
   System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() +24
   Microsoft.AspNet.Identity.CultureAwaiter`1.GetResult() +123
   Microsoft.AspNet.Identity.<CreateAsync>d__0.MoveNext() +795
   System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) +93
   System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) +52
   System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() +24
   Microsoft.AspNet.Identity.CultureAwaiter`1.GetResult() +123 …