How to solve Flutter CERTIFICATE_VERIFY_FAILED error while performing a POST request?

I am sending a post request in Dart. It is giving a response when I test it on API testing tools such as Postman. But when I run the app. It gives me the following error:- ``` E/flutter ( 6264): Hands...

23 Jun at 15:56

F# type providers vs C# interfaces + Entity Framework

The question is very technical, and it sits deeply between F# / C# differences. It is quite likely that I might’ve missed something. If you find a conceptual error, please, comment and I will update t...

21 Jan at 00:49

Connecting to an Azure Devops private NuGet in vs code

We have a private `NuGet` feed. It has been working well with `Visual Studio`. Our developers connect through their `Azure` account with the private feed. I'd like to keep this same functionality when...

How does EF Core Modified Entity State behave?

Does it matter we put the entity state = modified after changes or before making changes? ``` using (var db = new LakshyaContext()) { foreach (var category in db.Categories) { db.Entr...

23 Apr at 12:48

"Failed to install the following Android SDK packages as some licences have not been accepted" error

I am getting this error in jitpack, I've tried everything on the internet. Below is my error ``` Failed to install the following Android SDK packages as some licences have not been accepted. pl...

Why is client-side Blazor using .NET Standard 2.0 and how to use .NET Core 3.0 with Blazor?

Is it possible to use .NET Core 2.2 or 3.0 with Blazor? Because at this moment, the `blazorhosted` template creates a client-side project as .NET Standard which prevents using .NET Core 3.0. > Proje...

Actions require unique method/path combination for Swagger

I have 2 `HTTP GET` method in same controller and give me this error > HTTP method "GET" & path "api/DataStore" overloaded by actions - DPK.HostApi.Controllers.DataStoreController.GetByIdAsync (DPK.H...

Unit testing with EF Core and in memory database

I am using ASP.NET Core 2.2, EF Core and MOQ. As you can see in the following code, I have two tests, and running both together, with both database name "MovieListDatabase" I got an error in one of t...

Can I get a pointer to a Span?

I have a `(ReadOnly)Span<byte>` from which I want to decode a string. Only in .NET Core 2.1 I have the new overload to decode a string from it without needing to copy the bytes: ``` Encoding.GetStri...

Absolute path in dotnet watch run command doesn't work

To run dotnet core application with specified absolute path we need to run following command: ``` dotnet run -p C:\foo\bar\Project\Project.csproj ``` But it seems it doesn't work the same with `dot...

9 Mar at 15:32

Virtualbox enable nested vtx/amd-v greyed out

On my , I've installed in order to have . Virtualization is in my bios. However, when I open the settings of my (powered off) virtual machine and go to -> , the option "" is greyed out and I canno...

18 Jan at 10:16

OpenCV TypeError: Expected cv::UMat for argument 'src' - What is this?

Disclaimer: huge openCV noob > Traceback (most recent call last):File "lanes2.py", line 22, in ``` canny = canny(lane_image) ``` File "lanes2.py", line 5, in canny``` gray = cv2.cvtColor(imgUMat, cv2...

18 Jan at 08:46

Tuple Must Contain at least two elements

Going through the Microsoft Documentation and Working through the tutorials, I'm currently working on the Classes and Objects Module. is what we start with, and I'm to call upon this class as a test i...

7 May at 05:44

ServiceStack.Text version 5.4.0 default char value serialization and deserialization

This happends JsonSerializer but not with TypeSerializer. Default char serialization is "\u0000" but deserialization of that string into char is '\'. Is this a bug? or I am missing something? Any w...

21 Jan at 08:1

ValueGeneratedOnAdd has no effect

For example, I have the next table: There is a part of entity mapping: I have the MS SQL server with that table on the client side and the same table on the server side. My program retrieves data from...

6 May at 20:36

ASP.NET Core 2.2: Unable to resolve service for type 'AutoMapper.IMapper'

I am building an API to return Portos and Especies, but anytime that I access /api/portos (as defined in the controller), I get this error: > InvalidOperationException: Unable to resolve service fo...

Model bound complex types must not be abstract or value types and must have a parameterless constructor

I have the following problem, I created an application to add game categories and the games themselves to the database. I created a relationship and unfortunately when I add to the database I get an e...

6 Dec at 09:8

float/double Math.Round in C#

``` float ff = (float)31.15; double dd = 31.15; var frst = Math.Round(ff, 1, MidpointRounding.AwayFromZero); var drst = Math.Round(dd, 1, MidpointRounding.AwayFromZero); ``` Can someone expla...

12 Jun at 17:23

Get by HTML element with React Testing Library?

I'm using the `getByTestId` function in React Testing Library: ``` const button = wrapper.getByTestId("button"); expect(heading.textContent).toBe("something"); ``` Is it possible / advisable to searc...

14 Dec at 17:19

How to implement Async Command

Although I have understood async programming with c# somehow, still don't get why async with void is not the better solution, then when I want to improve my Xamarin Forms code I found many MVVM framew...

21 Aug at 05:18

How to mock the new HttpClientFactory in .NET Core 2.1 using Moq

.NET Core 2.1 comes with this new factory called `HttpClientFactory`, but I can't figure out how to mock it to unit test some methods that include REST service calls. The factory is being injected us...

How to use bearer authentication in openapi-codegen generated python code

I am using the OpenApi 3.0 specification to document my API. It is basically a REST API which requires a valid Bearer token for each request except for the login request. The OpenAPI spec looks like t...

Mocking EF core dbcontext and dbset

I am using ASP.NET Core 2.2, EF Core and MOQ. When I run the test I am getting this error: > Message: System.NotSupportedException : Invalid setup on a non-virtual (overridable in VB) member: x => x....

The non-generic method 'IServiceProvider.GetService(Type)' cannot be used with type arguments

I am using .NET Core dependency injection, but when I am trying to get the service in another class, I am getting the 'IServiceProvider.GetService(Type)' cannot be used with type arguments' error. W...

AspNet Core Logging working but not inside ServiceStack services when hosted in Azure

I have a simple ServiceStack service with some logging added. ``` log.Info("In Vehicle service request"); if (log.IsDebugEnabled) log.Debug("Debugging Vehicle service request"); ``` log is defi...