Questions tagged [.net-core]

.NET Core is a lean, composable and cross-platform framework for building web and cloud applications. It is fully open source and available on GitHub (https://github.com/dotnet/core). Applications in .NET Core can be run and/or hosted on Linux and MacOS under .NET Core.

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52 views

How can I write integration tests if I need dynamically generated values from a javscript file?

We have a react website that, as part of it's process, loads a dynamically generated javascript file from a third party. It uses some of the scripts in this javascript file to generate values, which ...
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93 views

How can I improve this API solution

Intro I'm creating an app and I'm not sure if the structure of the solution is correct. I have a BaseController that uses generics. This controller is inherited by others that do not have to ...
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2answers
133 views

Why it is possible to specify a value comparer for ImmutableDictionary<TKey, TValue>?

What is the intended usage of the ImmutableDictionary<TKey,TValue>.ValueComparer property? Why is it useful being able to compare dictionary values by using a specified equality semantic? I ...
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1answer
36 views

Custom File System Index/Cache - How to save index

I've got an extremely oniony(deep) folder structure which contains Appx 1,000,000 text-based files on a network share. Using windows search is extremely slow and unreliable. I've created some text ...
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4answers
243 views

How to create a modular system of multiple .NET Core applications extending a single application?

So first of all let me explain what I want to achieve: I want to create a basic .NET Core console application which is responsible for loading external extensions (more on this later on), listening ...
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1answer
111 views

Is it bad practice to mutate your HttpClient objects?

Im in the process of creating a base class for typed HttpClient services (yes, I'm utilizing IHttpClientFactory). I wrote the process in such a way that for each CRUD method invoked from the service, ...
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2answers
175 views

Why is it allowed to refer .net framework libraries in a .net standard library?

.Net Standard is specification. There are two popular implementation of the .net standard specification. ie .Net Core & .Net Framework When I create .Net Standard library, I am allowed to refer ...
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2answers
84 views

How to Mock NamedPipeClientStream

I created a class called MpvController to handle communication protocols over a .NET NamedPipeClientStream. Now, I need to test this controller. I have a second class named MpvControllerFactory that ...
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5answers
274 views

How to force consumption of an object once it is created?

Use case: I need to create serial numbers that are accountable for, so serial number objects, once created must have a destination: either they are used (they get a code) or they are discarded. For ...
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2answers
258 views

C#: Use Double Await Cause Issues?

We have Application service Method, which extracts data from SQL database using Entity Framework Core . Its Async method along with the Async Controller. Service: public async Task<IEnumerable<...
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3answers
78 views

When to set constants during DI setup and when expect them on the fly as parameters?

Let's assume you have a project (e.g. .NET Core) using dependency injection. A database repository relies on a database connection string. public abstract class BaseRepository { // use this when ...
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4answers
136 views

Should you validate route parameters or let them fail with a 404?

So this is an example endpoint to fetch one user by its username [HttpGet("{username}")] public async Task<ActionResult<object>> GetUser([FromRoute] string username) { // ... ...
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0answers
86 views

Net Core: Solutions to Update History Tables in Application Design

Our company did not properly design Address Record Code Module. Developers are updating Address SQL table with Multiple Service Methods, and are not updating AddressHistory Sql table. They're asking ...
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1answer
37 views

keep Controllers at one place or organize by domain

When creating a new .NET Core Web API the controllers will be put in the Controllers directory. I want to create request models for incoming requests (for validation purposes) and response models ...
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Can a common ActiveMQ service be shared in a dev environment without messages being consumed between developers?

Our dev environment is currently sharing an ActiveMQ service hosted on AWS. This however resulted in problems where dev A's service produce a message that will trigger dev B's localhost consumer. Is ...
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3answers
174 views

How to clone an object graph and keep relationships of objects intact?

In my ASP.net core application with Angular 2+ client, I work with a complicated object graph. In the object graph I have some objects with references to each other. I have a simplification included ...
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1answer
182 views

What's a good liveness probe for a Hangfire background job server?

We're in the process of moving everything to K8s and one of our applications is a small .NET Core 2.2 console app that runs a Hangfire background job server. At the moment the app runs as a Windows ...
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0answers
100 views

Technical architecture of platform on .Net Core

I'm designing a platform that will run robots developed by others. Basically anyone could implement a IAutonomousAgent and register the implementation on the platform. At runtime, the platform will ...
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2answers
130 views

Call API endpoint from API itself

I'm creating an .NET Core 3 API with Entity Framework. The data is from an existing database. Now I've the following situation: /persons -- get all the persons /companies -- get all the companies /...
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2answers
207 views

Is there still a place for non-async methods in Data Repository?

If we start a .NET Core 3.0 project today, which will use database connection (for example ASP.NET Core Web API), is there still a place for non-async operations while talking to the database? Or in ...
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0answers
39 views

Registering dependency implemented in separate assembly with shared interfaces

Situation: I have a project with a Business Layer (WizBang.BL) that contains nearly all of my application logic. It communicates with a Data Layer (WizBang.Data) that contains by entity classes and ...
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3answers
7k views

How to justify using await instead of .Result() or .Wait() in .NET Core?

Since the inception of .NET Core, console apps, function apps, ASP.NET etc. are not using synchronization context in async methods (so they're synchronizing straight to Thread Pool). This means that ...
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1answer
72 views

Dependency Injection and Factory resolution

In the below example, assume FooA and FooB each have constructors that have a large amount of dependencies being injected into them. If I have a class that needs to determine which IFoo ...
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2answers
95 views

Unit Testing Complicated Service Call with Many Methods

I am trying to understand principle of Unit testing, Purpose, and Moq. We have complicated Service Call. The Service Call encompasses numerous Repositories and Services, with dependencies and ...
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1answer
403 views

Should Specification Patterns return IEnumerable, IQueryable, or Expression?

We are implementing Specification Patterns with Domain Driven Design. Company architect also wants us to utilize Generic repository (not my choice). Currently require specification Pattern for Filter ...
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1answer
811 views

Domain Driven Design: Should Specification Pattern exist in Repository or Application level for Paging?

In Domain Driven Design, should the specification pattern for paging/pagination exist on the Repository level or Application level, or another layer? Trying to see what Eric Evans author of DDD stated....
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1answer
82 views

How to properly handle deployment configuration for Xamarin Forms app

We are currently working on a Xamarin Forms (.NET Core) application. We use Microsofts DevOps for the code repo, building and deployment. Since we want to test newly developed features in a safe ...
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3answers
1k views

Why is it necessary for every new api to be async?

I'm expressing my frustration here somewhat, but why do many new libraries only have asynchronous APIs? For example I'm creating a small utility to fetch a web page and parse some data from it. ...
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0answers
62 views

How to send messages in the order they were queued, while ensuring that client B does not have to wait until client A has received his message?

I have a simplified producer/consumer pattern implemented below. The code outputs: "A" 1 second delay "B" 1 second delay "A" 1 second delay "B" ... What ...
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2answers
397 views

Hosting a standalone .Net Core Web Application

We've created a .Net Core Web Application and are deploying it as a stand-alone exe. The main reason for deploying it stand-alone was to not be dependent upon the version of .Net Core installed on the ...
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1answer
73 views

A RESTful API for internal company system accessing peripheral devices

I am currently working on an internal storehouse management system for a certain company. They wanted it to be a web app so that they can use it without installation on any devices. We decided to ...
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1answer
303 views

Throttling the factory function of a Lazy<T> instantiated with LazyThreadSafetyMode.PublicationOnly

When you use the constructor of Lazy<T> requesting the valueFactory and mode parameters (I mean this one) you can specify LazyThreadSafetyMode.PublicationOnly. This way you can prevent the Lazy ...
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2answers
1k views

C# extension methods design patterns and usage guidelines?

C# extension methods have seen a rise in usage over recent years. The offical microsoft guidelines on usage state: "In general, we recommend that you implement extension methods sparingly and only ...
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1answer
148 views

Architecture to lock account to mobile device

I'm currently creating a mobile app and have the following issue. I am required to only allow the user to login from a device that is registered to the users account. A user can have up to X number of ...
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4answers
1k views

Service Oriented Architecture (SOA): One Database or Multiple Databases?

In Service Oriented Architecture (SOA), should there be One Single Database "with the share as much as possible philosophy" or Multiple Databases by Service/functional area? I know in Microservices, ...
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0answers
144 views

Real-time application and RDBMS bottleneck

I'm currently developing a real-time application using .NET Core 2.2. Many IOT devices (could be up to 100) are concurrently sending messages via MQTT. These messages are parsed, elaborated to extract ...
1
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1answer
388 views

Data entities in Onion Architecture

I'm trying to build a project using onion architecture (just a "Northwind"ish type app to get more up to speed with .NET Core). I also want to get a better grasp on Onion Architecture principals. I ...
3
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1answer
280 views

Internationalization in .net core

I am currently in the process of developing an ASP.NET Core application which requires internationalization to Russian. I have been reading over the documentation that Microsoft provide for .NET Core ...
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2answers
175 views

Can I build a fully open source app with .Net Core [closed]

I am thinking about starting an open source project and right now I am deciding what technology stack to use. At the moment, my main coding experience is using C# and I am wondering if I can build a ...
1
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1answer
187 views

Why do some eShopOnContainers Service API Unit Tests not reference API classes only WebMVC? [closed]

I have been trying to learn more about MicroServices architecture and I am using Microsoft's eShopOnContainers as a reference because I am familiar with .NET. I am getting into the part about testing, ...
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2answers
3k views

Should AutoMapper be used to Map from ViewModel back into Model?

Should AutoMapper be used to take data from ViewModel and save back into a database model? I know the opposite practice is good software practice: to have Automapper to extract database models, and ...
1
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1answer
757 views

Will (await method).ToList() block the thread? [closed]

I'm using a lot of async Task<IEnumerable<T>> methods and I want to stop doing this everytime to get the items as a list: var items = await AsyncMethodThatReturnsEnumerable(); var ...
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1answer
84 views

Am I making API creation difficult when it comes to authentication?

I know the sites are not geared for recommendations so I am hoping to pose this question in a way that doesn't ask for recommendations. Questions comments are welcome. I am just getting involved in ...
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3answers
740 views

Where to apply multi-tenant logic (ASP.Net Core)?

I'm developing a multi-teant SaaS application in ASP.NET core mvc and I was wondering what the general approach is to applying tenant logic in a shared database scenario (TenantId for each entity). ...
0
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1answer
69 views

Load files depending on browser or write workarounds within the file?

I'm writing up this website running under IIS with .NET Core. I developed most of the site with minimal use of JS so that the server will be doing most of the work (and thankfully so because of the ...
8
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1answer
4k views

Should .NET Core class libraries register their own implementations?

Our team had recently a big struggle of deciding whether it is a good practice or not for the .NET Core class libraries to register their own implementations by the fact of providing a ...
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1answer
56 views

Defer insert data into a database

I need to insert some records into a database at a time when it normally it's not being used, what are some approaches I can take? I have considered using the SQL Server Agent to run some stored ...
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2answers
169 views

If I use .Net Core 2.0 my software must by open software? [closed]

If I use .Net Core 2.0 my software must by 'open software' or what? Sorry for my English.
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3answers
762 views

Multithreading ( thread per area ) for an MMO server, good idea?

As a personal project, I'm setting up a MMO, and writing the server in C#/.NET Core. As of now my architecture is as follows: The world exists of different areas ( you can go from area to area trough ...
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1answer
367 views

Time-based Task scheduler engine

I am working on an enterprise level application. I have an event table in the database. I need to update my events' states in the database on a precise date and time. There may be 200 milliseconds ...