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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3answers
68 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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0answers
40 views

Handling business rule validation in .net core without service class?

I have a .net core-application that needs to perform business rule validation and Im trying to avoid a bloated service-class. What Im looking for is some way to structure business rules and run them ...
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4answers
121 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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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
35 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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19 views

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
163 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
94 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
97 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
117 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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33 views

Is there any Composite build for multi repo .net core applications like Gradle - Java world?

Overview: We have a WebApplicationRepo, that has a WebApplication. (asp.net core application) We have a LibraryRepo, that has a library (.net core library) The library is packaged as a nuget package ...
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2answers
147 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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36 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
3k 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
68 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
86 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
286 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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188 views

API Class Input and Paging Specification Pattern in Net Core

I was reading following website, and created a PageModel and Specification pattern. Question is should I merge these two for good practice or keep separate? The PageModel will accept following ...
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1answer
581 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
56 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
854 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
271 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
238 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
919 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
147 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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3answers
748 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
134 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
271 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
250 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
167 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 ...
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1answer
183 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
2k 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 ...
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1answer
615 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
629 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). ...
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1answer
68 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 ...
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1answer
3k 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
50 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
168 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
665 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
341 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 ...
7
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4answers
4k views

Should it be a claim, a role or a policy?

The distinction between roles and claims is that roles describe a set of users and claims describe a property of a user. So there can be a role "Administrator", but there can also be a claim "...
5
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1answer
7k views

Unit Of Work with multiple database context

I have created an application (net core 2 & ef core) with Unit Of Work and Generic repository pattern. I used to have one database context but due to some business logic I had to create a second ...
2
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1answer
81 views

How best to organise a multitargeted VS solution being ported from .net Framework to both .net Framework+Core?

I'm not a native English speaker, and i'm new to .net Core. I have a task to port the logic of a WPF app to .Net Core while leaving this app working like previously. The app has approximately 70 ...
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0answers
79 views

Should I use CQRS in this case?

I'm building web API. I have a problem where input differs from the output, for example, input expects just the id and output returns entire object. Also, there are few things specific to the output ...
5
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1answer
712 views

How does a pure P2P node connect to other nodes

I'm working on my first P2P app using C# core and gRPC and I'm finding it difficult to understand the concepts of how nodes find each other and build a routing table. For my design I'd like to only ...
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3answers
504 views

Platform independant ways of passing messages between executibles

I am working on an a data collector which could be called an API of some sorts, which is based on .Net Core 2.1 . It's job is to receive and pull (ask for) data from data collectors(executable, DLL,...
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2answers
160 views

.NET Core: Does sending the same request multiple times as part of a stress test/load test make the test unreliable?

I've got a .NET Core application that takes HTTP requests. I'm a little bored, so I decided to stress-test it using West Wind Web Surge, and putting an example request as the body. My question is, ...