How to access current HttpContext in ASP.NET Core 2 Custom Policy-Based Authorization with AuthorizationHandlerContext

How can I access current HttpContext to check for route and parameters inside AuthorizationHandlerContext of Custom Policy-Based Authorization inside ASP.NET Core 2? Ref example: [Custom Policy-Based...

EF Core connection string in Azure Functions .NET Core

I'm using EF core 2.0 in Azure Functions using .net core. I'm trying to read db ConnectionString from local.settings.json, which is defined: `Environment.GetEnvironmentVariable()` doesn't return any c...

BitBlt screen capture not working on Windows 10

I'm using this code to capture a process window in the background: ``` IntPtr = Process.GetProcessByName("memu")[0].MainWindowHandle; RECT rc; GetClientRect(hwnd, out rc); IntPtr hdcFrom = GetDC(hwn...

4 Feb at 02:36

Pause/prevent animation for a checkbox control

I have a checkbox substituting a switch-like control. [](https://i.stack.imgur.com/hsErO.png) [](https://i.stack.imgur.com/aiUfc.gif) It works great. The only problem is that this checkbox initial ...

17 Dec at 19:37

Is AsList() better than ToList() with IDbConnection.Query() which returns IEnumerable?

I read this answer from Marc Gravell (@MarcGravell): [https://stackoverflow.com/a/47790712/5779732](https://stackoverflow.com/a/47790712/5779732) The last line says: > As a minor optimization to you...

Generate Excel with merged header using NPOI?

I tried to export excel sheet using NPOI like bellow but I am unable to change the background color and set second cell value. Bellow are my code. Desired Format: [![Desired Format][1]][1] [1]: https...

6 May at 00:55

Font Awesome 5 font-family issue

I integrated Font Awesome 5 in a project with bootstrap 4. When I recall a font via CSS it does not work. with Font Awesome 4 the code was as follows: ``` #mainNav .navbar-collapse .navbar-sidenav .n...

23 Feb at 14:12

Dapper vs ADO.Net with reflection which is faster?

I have studied about Dapper and ADO.NET and performed select tests on both and found that sometimes ADO.NET is faster than Dapper and sometimes is reversed. I understand this could be database issues ...

13 Dec at 08:13

LINQ select property by name

I'm attempting to use a variable inside of a LINQ select statement. Here is an example of what I'm doing now. ``` using System; using System.Collections.Generic; using System.Linq; using Faker; n...

31 Oct at 22:43

Why WindowsIdentity class is not visible in .NET Core

Having the code below in VisualStudio 2017 .NET Core 2.0 Console App ``` using System; using System.Security.Principal; namespace smallTests { class Program { static void Main(string...

12 Dec at 23:57

How can I bind a collection of C# 7.0 tuple type values to a System.Windows.Forms.Listbox and set the display member to one of the elements?

I have a `System.Windows.Forms.Listbox` and a collection of tuple type values I've created. That is, [the new tuple type introduced in C# 7.0](https://blogs.msdn.microsoft.com/dotnet/2016/08/24/whats...

12 Dec at 15:22

Are readonly structs supposed to be immutable when in an array?

(Note: This sample code requires C# 7.2 or later, and the [Nuget System.Memory](https://www.nuget.org/packages/System.Memory/) package.) Let's suppose we have a `readonly struct` as follows: ``` pub...

7 Feb at 02:55

ASP.NET Core EventLog provider

I have a project using ASP.NET Core and want to implement logging to windows event log: Code to add log providers: Controller: And it works for console, I see my log messages. But i can't find that me...

How to change the default browser used by jupyter notebook in windows

I'm on a windows machine without admin right and I would like to run jupyter on chrome, while the default browser is another. I have a local installation of the Anaconda distribution and my first opt...

ASP.NET Core 2.0 using Serilog to log stacktrace when exception is thrown

So I've recently started to build a asp.net core application and for the logging i'm using SeriLog. This was working fine until recently I found out that most of the time the stacktrace of an exceptio...

Xamarin Android Build Failed "Invalid value for outputAssembly"

A few days ago my solution seemed to work fine, but today all of the sudden the Android project doesn't build. I get no Error, but I do get the following output: ``` 1>Build started. 1>Project "MyApp...

html pattern to only accept numbers

I have this simple html: ``` <input type="text" placeholder="onlynumbers" name="onlynumbers" pattern="\d{1,5}" maxlength="5"> ``` I need to restrict the number of c...

12 Dec at 09:38

Cannot create instance of type 'System.String'

I try to get my section from appsettings.json, and then bind it to the intance of MongoSettings class, but I have an exception which is: > "Cannot create instance of type 'System.String' because it ...

12 Dec at 07:4

React Native version mismatch

Getting the following message when I init a new project and then launch the Xcode emulator: > React-Native Version MismatchJavascript Version 0.50.1 Native version: 0.50.0 Make sure you have rebuil...

17 Jan at 18:56

Create ServiceBus topic if it doesn't already exist

Microsoft has updated their .NET ServiceBus client library, and their documentation is currently split between the old [WindowsAzure.ServiceBus](https://www.nuget.org/packages/WindowsAzure.ServiceBus/...

8 Dec at 04:40

Load X509 certificate from disk .Net Core

I've created an X509 certificate using OpenSSL. I am trying to load it using the Import method on the X509Certificate2 class, in .NET Core 2.0. ``` var cert = new X509Certificate2(); cert.Import(_pat...

Typescript Array Map Return Object

I have the following code. ``` array.map(val => { return { key1: val.key1, key2: val.key2 }}); ``` Is there any way to reduce the code to something like this? ``` array.map(val => { key1: va...

11 Dec at 14:37

How can I test for object keys and values equality using Jest?

I have a `mapModule` where I import components and export them: ``` import ComponentName from '../components/ComponentName'; export default { name: ComponentName, }; ``` How can I test that `mapMo...

5 Oct at 07:43

does the user login restriction based on IP address support ipv6 for web application?

Does any one know how to restrict the user to login based on an IPV6 address for a web application in c# dot net? I have already done the functionality using IPV4 and it's working fine, but I wanted ...

app.config not beeing loaded in .Net Core MSTests project

I'm working on a project were I'm trying to port several libraries from .NET Framework 4.5.2 to .NET Core 2, and I'm facing some problems trying to read legacy app.config appsettings in unit tests. To...

11 Dec at 12:15