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29.7k views

C# compiler throws Language Version (LangVersion) reference error "Invalid 'nullable' value: 'Enable' for C# 7.3"

I have solution with couple .NET Standard projects in all I wanted to enable c# 8 and nullable like below: ``` <PropertyGroup> <TargetFramework>netstandard2.1</TargetFramework> <LangVersion>8....

Modified: 31 Mar at 08:58

38 votes

155.3k views

How to Style React-Icons

I am trying to figure out how to style icons that I import using [react-icons](https://react-icons.netlify.com/#/). In particular, I would like to be able to create a look similar to this: [](https:...

Modified: 17 Jun at 17:44

11 votes

17k views

Activate auto-complete for C# in Visual Studio 2019

I have the problem, that I get some suggestions for autocompletion (for example, I type "Cons" and I get the suggestion for "Console"), but these can't be applied with the Return-key. Normally, the s...

Modified: 17 Jun at 09:28

93 votes

308.2k views

Could not find the implementation for builder @angular-devkit/build-angular:dev-server on ng serve command

I tried to update the angular CLI following [this](https://www.npmjs.com/package/@angular/cli#updating-angular-cli), but now I can't run my app. When I try to run the command `ng serve`, it gives me t...

Modified: 13 Dec at 07:22

25 votes

22.5k views

How to resolve .NET Core package version conflicts

I am migrating from a .NET MVC 5 Web Application to a .NET Core 2.2 Web API project along with five .NET Standard 2.0 projects all housed under one solution. I am now receiving 28 warnings (MSB3277)...

Modified: 21 Jun at 18:13

38 votes

43.5k views

Display wait or spinner on API call

In my Blazor app I am making an API call to a back end server that could take some time. I need to display feedback to the user, a wait cursor or a "spinner" image. How is this done in Blazor? I have ...

Modified: 7 Oct at 20:5

16 votes

551 views

What is the behaviour of the '==' operator for a generic type value and the 'default' keyword?

Part 1 of the question: In the following code why does `value == default` compile fine but the other alternatives do not? ``` bool MyEqual<T>(T value) { T value2 = default; if (value == value...

Modified: 14 Jun at 17:25

1 votes

25 views

Where does ServiceStack publish vulnerability information?

If a vulnerability were to be discovered for any versions 3/4/5 and a patch were to be released - where would ServiceStack publish vulnerability information?

Modified: 14 Jun at 12:28

103 votes

141k views

Check that button is disabled in react-testing-library

I have a React component that generates a button whose content contains a `<span>` element like this one: ``` function Click(props) { return ( <button disable={props.disable}> ...

Modified: 25 Jan at 15:49

34 votes

74.4k views

How to validate uploaded file in ASP.Net Core

I'm using ASP.NET Core 2.2 and I'm using model binding for uploading file. This is my ``` public class UserViewModel { [Required(ErrorMessage = "Please select a file.")] [DataType(DataType...

Modified: 13 Jun at 22:29

12 votes

12.6k views

Generate JSON string from dynamic ExpandoObject

I am using C# and trying to generate a JSON string from a object. ``` dynamic reply = new System.Dynamic.ExpandoObject(); reply.name = "John"; reply.wins = 42; string json = System.Web.Helpers.Json....

Modified: 13 Jun at 20:47

108 votes

270.5k views

How to use host network for docker compose?

I want to use docker compose with the host network. I have a docker container that access a local REST api. Usually I run ``` docker run --net=host -p 18080:8080 -t -i containera ``` which can ...

Modified: 13 Jun at 15:22

12 votes

18.8k views

How to allow an empty request body for a reference type parameter?

I'm Building an .Net Core api controller, I would like to allow users to send `GET` requests with or without the `MyRequest` class as a parameter, so the calling the method with `Get(null)` for exampl...

Modified: 13 Jun at 11:25

29 votes

19k views

Blazor the type or namespace name 'App' could not be found (are you missing a using directive or an assembly reference?)

I have setup the basic application in Blazor in Microsoft Visual Studio Community 2019 Version 16.1.3 and I have tried both of the versions of .NET Core SDK 3.0.100-preview5-011568 and SDK 3.0.100-pre...

Modified: 15 Oct at 06:44

31 votes

217k views

How can I "login" to git?

I need to change who git thinks I am so I can push to a different repo ( both are mine. ). Here is a [similar issue](https://stackoverflow.com/questions/13103083/how-do-i-push-to-github-under-a-diffe...

Modified: 13 Jun at 04:47

2 votes

76 views

ServiceStack RequestLogger only logs one service call

Lets say I have a Service that calls a bunch of other services through the Gateway.Send : ``` public class SomeService : Service { public SomeServiceResponse Any (SomeServiceRequest reque...

Modified: 12 Jun at 22:14

266 votes

354.2k views

Typescript: No index signature with a parameter of type 'string' was found on type '{ "A": string; }

I have some vanilla javascript code that takes a string input, splits the string into characters, and then matches those characters to a key on an object. ``` DNATranscriber = { "G":"C", "C":...

Modified: 12 Jun at 19:9

13 votes

19.9k views

Connection refused on API request between containers with docker compose

I'm developing a multi-container Docker application and I want a container to make an HTTP request to API of other container using Docker Compose. I'm getting Connection Refused error. Both container...

Modified: 1 Jul at 10:36

9 votes

155.2k views

How to fix "VirtualBox Interface has active connections" error in Windows?

Windows 10 is displaying a error message when shutting down after using Docker Quickstart Terminal on Virtual Box. I tried to fix this by typing `exit` to close the terminal. How can I smoothly clo...

Modified: 12 Jun at 12:48

14 votes

652 views

Why does the is-operator cause unnecessary boxing?

The [documentation](https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/is#-constant-pattern) of constant pattern matching with the `is`-operator (`expr is constant`) states: >...

Modified: 20 Jun at 09:12

100 votes

141.2k views

How can I export DBeaver connection configurations?

I was hoping there is a way to export DBeaver connection configurations/properties from my old machine rather than having to go through the process of recreating each one. Does anyone know how to do ...

Modified: 20 Sep at 17:16

13 votes

6.6k views

Is injecting service into another service bad practice?

I am creating a web application that is tiered in the following way: Controller > Service > Repository So it's following a service and repository pattern. Let's say I have 2 entities `Product` and...

Modified: 6 Jun at 22:18

153 votes

148.6k views

react-testing-library why is toBeInTheDocument() not a function

Here is my code for a tooltip that toggles the CSS property `display: block` on MouseOver and on Mouse Out `display: none`. ``` it('should show and hide the message using onMouseOver and onMouseOut ev...

Modified: 20 Sep at 21:14

1 votes