Questions tagged [c#]
C# is a multiparadigm, managed, garbage-collected object-oriented programming language created by Microsoft in parallel with the .NET platform
1
vote
3answers
134 views
Is it possible to throw compiler error when attempting to use an unimplemented method?
The backstory is long but the general idea is that I'm beginning an iterative refactoring process to replace a poorly designed data access layer with a new one under constraints from above. We can't ...
0
votes
1answer
43 views
Can a query handler (not repository) access a web service?
Say I have the following class, which maps to a database table:
public class Person
{
public Guid Id {get; set; }
public string Name {get; set; }
public DateTime DateOfBirth {get; set; }
public ...
0
votes
2answers
73 views
What is the appropriate architecture to access variable in parent from element of child list?
I have a Parent object which looks like this (pseudocode):
class Parent {
String token;
Child[] children;
}
It contains a token string and an array of Child objects. My problem is that each of ...
0
votes
4answers
155 views
How do you manage objects that are shared between back-end services and front-end services/apps?
I have multiple REST-ful APIs that I'm using as my "back-end". I also have multiple web apps (.NET MVC). These web apps make calls to the APIs for data. So, an object being returned by an API will be ...
1
vote
3answers
215 views
Determining response codes from void functions OOP
I am trying to create a Put endpoint using rest. Let's say that under the link
/addresses/12345
I am trying to add a new address (if that id doesn't exist) or I'm trying to update it if it does ...
1
vote
2answers
1k views
Is there a canonical way to handle JSON data format changes?
Problem
Say we have a C# class with is serialized to JSON (currently via Newtonsoft's JSON.Net) and stored in a database:
public class User
{
public string authInfo;
}
If the class definition ...
1
vote
1answer
83 views
What is the proper way to change the View from a ViewModel when using the MVVM pattern?
I'm trying to follow the Model–View–ViewModel pattern in a Xamarin application and am wondering how the View should be able to change when a given ViewModel is finished. Below I have listed the ideas ...
0
votes
0answers
42 views
.NET WPF Best way to store a connection credential
I have an application that connects to SQL Server using windows credentials, which works very well for the domain paradigm. The client is now transitioning away from having a domain server, and is ...
0
votes
0answers
23 views
Designing the API of a VMF (Variable Message Format) Parser [closed]
Variable Message Format (VMF) is covered by the MIL-STD-2045-47001 and MIL-STD-6017. The tl;dr for these standards and the format is, that it represents a message format, which contains variable ...
3
votes
3answers
427 views
Is it bad practice to create an interface only to combine two other interfaces?
I'm working on an infrastructure for inter process communication.
I have created two interfaces, one to send data and another one to listen to data being sent:
public interface ISender<T> : ...
2
votes
4answers
151 views
Are there advantages to testing accessors separately?
If I were to have a class with a property on it should I be testing the get and set functionalities separately or together?
class MyObject
{
public string Name { get; set; }
}
[TestClass]
class ...
0
votes
2answers
59 views
Approach to handling multiple instances of an application that make large database operations simultaneously
So, essentially the flow of my application works like this:
A user selects some options to start a process on the server.
Once they hit submit, on the server it opens up a console application that ...
0
votes
2answers
137 views
How to implement a combination of behaviours for my objects
I need to create a program to manage an association.
Members of this association have different roles and each role has specific characteristics.
My problem is that I'm not able to abstract this ...
6
votes
5answers
355 views
Is there a reason to define an interface for a pure data class?
I am reviewing a colleague's code and as part of the changes, this person introduced a few new pure data classes like so (C#):
public class Result : IResult
{
public bool Succeeded { get; set; }
...
0
votes
1answer
45 views
Updating sub-properties via Entity Framework
I was wondering how to updated nested objects/sub-properties when using Entity Framework. But to make things clear, let's start with an example.
I have an object, which can own a number of other ...
2
votes
2answers
108 views
Dependency inversion vs repository pattern (app layer dependency on ORM)
Let's say we have an application layer with some command handler and we use an Entity Framework database context/ORM context in that handler.
I would invert dependencies from the Entity Framework/...
1
vote
2answers
50 views
Branching SQL relationship to C# object model
I'm developing a C# WPF desktop application where I need to read/write to an SQL database regularly. Now I want to map the data from the database to objects in C#. I can't use Entity Framework so I'm ...
2
votes
1answer
91 views
Changing static method that now requires a runtime dependency
I had a simple static method which would take a value and a unit type (pounds, gallons, dollars) and would just format a string. A simplified example:
public static string Format(decimal value, ...
-2
votes
4answers
101 views
Mocking dbContext vs Repository
I use entity framework with Repository Pattern. while searching for means of writing unit test cases that run isolated from the database I found some people mocking the database context and others ...
5
votes
1answer
244 views
Is it better to use lambda functions or boolean variables to record state
I have heard some people claiming that boolean state variables are generally bad and should be avoided when possible. Apparently in many cases it is possible to put state into lambda functions, ...
0
votes
2answers
126 views
Is using HTTPS for web service calls secure enough?
I'm developing software that calls a SOAP web service I've created.
My questions are about security:
Is it "enough" (about securing web service) to have my web site secured with HTTPS, and to call ...
0
votes
2answers
125 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
vote
1answer
73 views
Knowledge-based authentication using Domain-driven Design in C#
I previously asked this question on Code Review but was told this was 'off-topic' so I am trying it here. I hope someone can help guide me.
As part of an insurance claims system we have created, the ...
5
votes
3answers
322 views
Should I use the Factory Pattern when instantiating objects with very different constructors?
Let's say (just for the sake of example) I have three classes that implement IShape. One is a Square with a constructor of Square(int length). Second is a Triangle with a constructor of Triangle(int ...
0
votes
4answers
337 views
Is it possible to infer the the generic type from a generic method?
I'm making an HTTP API client class.
I want a Perform() method which takes a request object and returns an obejct that is expected from the API.
So a PostRequest object will describe how to get a ...
3
votes
1answer
113 views
Transforming a long-running operation into a step by step operation?
I am working on a video game in Unity and at some point I'm facing a tough problem to solve:
The game freezes while loading level data.
Let me lay down what's happening in that process that takes a ...
0
votes
1answer
98 views
Does a 'leaky' repository implementation defeat the point of a repository?
I've seen some tutorials and examples of implementing a repository pattern, and I don't quite understand something. My impression was that the whole point of a repository pattern was to hide the ...
0
votes
2answers
116 views
How to avoid ad hoc constructor for unit testing
According to the answer in this post Should my classes have separate constructors just for unit testing?
ad hoc constructor is not good and should be avoided.
Unfortunately, I have the same problem ...
0
votes
0answers
29 views
How many exchanges when using scatter gather and CQRS?
I am trying to learn more about CQRS and enterprise integration in my spare time. I have created an application, which uses CQRS and the Scatter Gather Pattern.
There are two web APIs for the CQRS ...
-1
votes
0answers
14 views
How do you cater for AND and OR searches in a WebApi query string using Get in C# [migrated]
How do you cater for AND and OR searches in a WebApi query string using Get in C#
For example, for searches such as firstName=John OR firstName=Simon AND Country=UK OR Country=Canada OR LastName=...
0
votes
4answers
201 views
Do we need Models if we are using ViewModels?
Why do we need Models when we could:
Only get the data (which is to be displayed)
Populate the ViewModel with this data
Pass this ViewModel into the View
1
vote
1answer
274 views
How to avoid Super User account from business?
I have developed a package program 3 tiers architecture. Persistence layer is developed by using Repository Pattern and Entity Framework 6 Code First Approach.
This package program has many features ...
1
vote
1answer
51 views
Mock a PART of EF DbContext with Moq and/or InMemoryDbSet
This question is NOT about what's here: https://stackoverflow.com/questions/25960192/mocking-ef-dbcontext-with-moq and/or similar questions. I am well aware of that. Please, read the question before ...
-2
votes
0answers
72 views
Best Practice on How to Log on the Client (WPF) With a Secret Key
I understand that secrets in the client are not considered secret. But now, I come across a dilemma, how do other client application use logging on the client or how do they communicate with another ...
1
vote
3answers
191 views
Does access modifier of types matter in projects other than class libraries?
I know it matters for class libraries, but does it matter in projects that are not class libraries, e.g. console applications or GUI applications?
What's the difference if I use public or internal or ...
1
vote
1answer
149 views
How to design a reassignable global instance that can be referenced by many other classes
I have a DeviceManager class which can handle different physical devices, and to say there are Classes A,B,C, which require a DeviceManager instance as dependency. They should always use the same ...
1
vote
1answer
128 views
How to manage context: set as property on class, or pass as parameter with each method?
I am writing a service, which is to be consumed by API and Web controllers. The result of each call depends on a UserContext state. Should I pass this UserContext with each method, which includes a ...
1
vote
0answers
31 views
is it better to have tracking fields that are maintained separately for arrays? [duplicate]
I wasn't sure exactly how to word this question, but basically, I have a struct stNeuralLayers (for a neural network I'm playing around with) with fields that are matrices (such as a double[,] ...
1
vote
3answers
94 views
Using extraneous enum members for bounds/validity checking
A coworker of mine insists that this is the right way to write enums in C#
public enum ExampleEnum
{
InvalidItem,
Item1,
Item2,
Item3,
MaxItem
}
We have enums defined like this ...
2
votes
3answers
154 views
C# Pattern for Creating/Hiding Object Graph Creation
I'd like to get some advice on what would be a good approach at hiding the creation of an object graph. In the code below I would like SomeClass to not be directly responsible for the creation of the ...
2
votes
0answers
57 views
How should domain model entities expose information about the current state of their properties?
I'm new to DDD, so please bear with me.
I am trying to design a domain model around an extremely large and complex existing system, where most of the current "domain" logic is either in the UI or in ...
2
votes
0answers
31 views
Can the read api receive events that the write api does not receive or raise?
Say I have a read API and a write API:
MyApp.Write.api
MyApp.Read.api
Both API's handle integration events from other apis/microservices. Say I had certain integration events that only need to be ...
2
votes
1answer
82 views
Trying to figure out how to make the syntaxes of 2 different API's the same
I'm doing research to a problem occurred in our company. We have a front-end web portal which communicates by API with a back-end in a same syntax, for example: "www.123.com/api/v1/getCustomers".
...
1
vote
0answers
91 views
Migrating desktop application to backend/frontend [closed]
I work on a large old (15+ years) Windows desktop application.
The applcation is a Frankenstein of legacy technologies: (ATL and ADO for db, .NET and COM with some legacy VB6 for business logic, ...
0
votes
0answers
25 views
Ranking / Generating score card based on scoresheet details
I am busy with a score keeping app. And would appreciate suggestions/ help. I will try to be brief and hopefully have explained the main gist of the app below
The app basically maintains some scores. ...
0
votes
1answer
117 views
Factories to create same objects with different data sources
I have several handlers classes that implements same interface and factories to create handlers.
Handlers:
public class Handler1 : IHandler
{
private readonly IService1 _service1;
private ...
1
vote
4answers
447 views
Declaring unnecessary variables for readability
I know some languages (C comes to mind) its best to declare as few variables as possible. In a language with memory management like C# is it better practice to continue with this philosophy or should ...
0
votes
1answer
54 views
Objectreference vs Equality [closed]
While coding I stumbled upon something like this (extremely simplified example):
public bool Func()
{
Object[] array = new Object[] {false, false};
return array[0] != array[1];
}
I was ...
0
votes
3answers
159 views
Designing a class whose dependancies require “starting”/initializing step
I have Facade class which requires an Endpoint instance to function (it uses it in most of the functions). Endpoint is attached to Platform that is passed in Endpoint's constructor and has to be ...
3
votes
1answer
154 views
Alternative to a utility class for extension methods in C#?
I understand that in OOP languages like C#, it is generally viewed as bad practice to create utility classes, and it's preferable to put methods in the classes in which they will be used.
To that ...
