'No database provider has been configured for this DbContext' on SignInManager.PasswordSignInAsync
> .Net Core 1.0.0 - SDK Preview 2 (x64).Net Core 1.0.0 - VS "15" Preview 2 (x64).Net Core 1.0.0 - Runtime (x64) So, we updated an RC1 app to the latest versions above. After many hours of switching re...
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- 20 Jun at 09:12
Where can I find a list of all available ChromeOption arguments?
I am a big advocate for reading the manual. But in this case, despite searching online for some time I cannot find a manual explaining all of the available `ChromeOptions` arguments. Somewhere there m...
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- 23 Jan at 10:8
Why specify route parameter type in web api?
I have a web api end point with a route parameter. It works with or without the route parameter type. I just would like to know why specify this in the following code? ``` [HttpGet] [Route("{myId:int...
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- 12 Jul at 16:29
Converting object to datetime format in python
Below is the first row of my csv DateTime column: ``` Mon Nov 02 20:37:10 GMT+00:00 2015 ``` The DateTime column is currently an object and I want to convert it to datetime format so that I can get t...
How to use Rijndael encryption with a .Net Core class library? (Not .Net Framework)
How do we use Rijndael encryption in a .Net Core class library? (Not a .Net Framework Class Library) We need to create a shared .Net Core library for use in multiple projects and need to implement En...
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- 6 Mar at 16:55
How do I access store state in React Redux?
I am just making a simple app to learn async with redux. I have gotten everything working, now I just want to display the actual state onto the web-page. Now, how do I actually access the store's stat...
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- 5 Mar at 10:32
What would the Big O be of a nested for loop with an Any() inside it?
This questions is basically a follow-on from my [answer here](https://stackoverflow.com/a/38332524/542251). I really wanted to say what the Big-O of this algorithm would be, but I wasn't sure my claim...
ASP.NET Core - Create custom model validation
In previous versions of ASP.NET MVC the way to add custom validation to your model was by implementing the `IValidatableObject` and implementing your own `Validate()` method. Here's what I have implem...
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- 14 Mar at 21:20
How to use Data Annotations to validate a nullable int
In an MVC 5 project, I have a model with a nullable int. For reasons that might not be productive to explain, it needs to be an nullable int and cannot be a string. ``` // Value can be null or an int...
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- 12 Jul at 14:44
Type.IsEnum Property in Portable Class Library
I'm trying to code in a `Portable Class Library` using `ASP.NET Core 1.0`, the following instruction: ``` public static void WriteMessage<T>(T value) { if (typeof(T).IsEnum) { Debug....
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- 12 Jul at 11:52
C# emulate HID clicker bluetooth
I need some guidance on how or whether this is possible to achieve without a "server" application running on the pc. I have gotten as far as establishing a bluetooth connection to the PC, I would like...
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- 7 Jan at 02:16
Why click tree throws 'System.Windows.Documents.Run' is not a Visual or Visual3D' InvalidOperationException?
Sometimes right-clicking treeviewitem results unhandled InvalidOperationException. In code behind I select the right clicked row: ``` static TreeViewItem VisualUpwardSearch(DependencyObject source) ...
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- 12 Jul at 09:39
error TS2339: Property 'x' does not exist on type 'Y'
I don't understand why this code generates a TypeScript error. (It's not the original code and is a bit derived, so please ignore the non-sense in the example): ``` interface Images { [key:string]: ...
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- 9 Feb at 19:59
How to add claims in a mock ClaimsPrincipal
I am trying to unit test my controller code which gets the information from the ClaimsPrincipal.Current. In the controller code I ``` public class HomeController { public ActionResult GetName() ...
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- 12 Jul at 08:41
Error: EACCES: permission denied
I run but it throws error. I know it is permission issue but as far as I know, sudo permission is not required for installing node module locally. If I run it with sudo, it gets installed inside ~/n...
Which members of .NET's ConcurrentDictionary are thread-safe?
The MSDN documentation of [System.Collections.Concurrent.ConcurrentDictionary](https://msdn.microsoft.com/en-us/library/dd287191(v=vs.110).aspx) says: > # Thread Safety All public and protected mem...
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- 12 Jul at 07:54
Why can't I put [assembly:Dependency()] above a class?
I'm trying to implement some platform-specific code in Xamarin, using [this answer](https://stackoverflow.com/questions/28688133/how-to-call-platform-specific-page-from-xamarin-forms), but I ran into ...
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- 23 May at 11:46
How to I set the Connection : Keep-Alive header to Close in the JsonServiceClient?
On occasion (not consistently), I'm receiving a "" exception thrown by an instance of the JsonServiceClient. I want to set the Http Connection Header to Close. When I attempt "" exception.
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- 12 Jul at 01:28
Mock IMemoryCache in unit test
I am using asp net core 1.0 and xunit. I am trying to write a unit test for some code that uses `IMemoryCache`. However whenever I try to set a value in the `IMemoryCache` I get an Null reference err...
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- 2 Feb at 12:54
Compiler Bug when using ?. resulting in a Bad Image that fails PEVerify
I stumbled across something odd: I got a `BadImageFormatException` without knowing what image (assembly) it could possibly refer to. I reduced the solution so that it consists only of a single projec...
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- 11 Jul at 22:30
Replace parameter type in lambda expression
I am trying to replace the parameter type in a lambda expression from one type to another. I have found other answers on stackoverflow i.e. [this one](https://stackoverflow.com/questions/11159697/rep...
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- 23 May at 12:32
Use a Identity 2.0 Database to Authenticate a ASP.NET Core 1.0 application
I am trying to a create a new ASP.NET Core 1.0 web application and I want it to use the Authentication tables that I already have set up. These tables were originally created by a ASP.NET 4.6 web app...
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- 12 Jul at 15:5
"OverflowError: Python int too large to convert to C long" on windows but not mac
I am running the exact same code on both windows and mac, with python 3.5 64 bit. On windows, it looks like this: ``` >>> import numpy as np >>> preds = np.zeros((1, 3), dtype=int) >>> p = [6802256...
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- 11 Jul at 18:51
Can a string-based Include alternative be created in Entity Framework Core?
On an API I need dynamic include, but EF Core does not support string-based include. Because of this, I created a mapper which maps strings to lambda expressions added to a list as: ``` List<List<Expr...
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- 4 Jun at 15:57