Questions tagged [c#]
C# is a multiparadigm, managed, garbage-collected object-oriented programming language created by Microsoft in parallel with the .NET platform
0
votes
1answer
14 views
Container in Windows Forms - registration and forms use
I am working at a Windows Forms project where I want to use an IOC container. There are forms where each form has dependencies to some specific services. Each service also has dependencies to some ...
0
votes
0answers
19 views
Extending IdentityUser with nullable foreign key to another IdentityUser
I'm working on a framework which builds on .net core Identity. Let's say I wanted to extend the IdentityUser<TKey> class with a ParentUserId property while the developer should still be able to ...
1
vote
1answer
57 views
Two-level concepts
I find myself lately implementing the same concept twice, once at a low level and once at a higher level. Let me see if I can explain it...
For example, given the notion of a database, I have one ...
4
votes
2answers
135 views
Repository pattern usage
I need some advice regarding repository pattern. Let's assume i have UserBal which stands for business logic which uses UserRepositoryDal where all database logic for that entity stands (queries to ...
0
votes
1answer
104 views
Do I need to unit test a generic method with all accepted types?
For a method whose signature looks like this:
public T Add<T>(T first, T second) where T : struct, IEquatable<T>, IComparable<T>
which can work with all of the integral types, do I ...
0
votes
1answer
36 views
Passing runtime-read configuration when working with an IoC container
I've recently "discovered" the IoC realm, and decided to refactor a project I'm working on to use such a container.
To be specific - I'm using autofac in C#, in a .NET Core console application.
The ...
0
votes
2answers
108 views
Building Client Specific Application on Top of Standard Application
I have a standard application and in this case, it is an Accounting ASP Net MVC application. Now, I have a new client that has their own specific requirements like other fields and some custom ...
1
vote
1answer
57 views
Simple Audit Logging Design
I have a C# MVC application. One of the requirements of the application is to maintain an audit log of everything that happens to a particular 'entity' page. To make the example concrete, lets say ...
-2
votes
0answers
33 views
Is wrapping Selenium WebDriver Methods makes it asynchronous? [closed]
As I know async/await keywords are converted in simple words in task.ContinueWith("All code after await operator") with AsyncStateMachine and so on. But I don't know details in what level calling ...
0
votes
1answer
88 views
Reset state or create new objects
I am developing a desktop application that will be run at each station at a call center. It listens for an incoming call, and whenever a call arrives, there are about 30 different classes that need ...
0
votes
1answer
81 views
Setters in ViewModels
So I have started reading some books and articles on architecture. They all state (put a little simply) that you should never let your view access the model directly, when using a Model-View-ViewModel ...
2
votes
2answers
237 views
Why does C# type pattern matching use a different variable scoping behavior than traditional switch blocks?
Traditional switch blocks have one scope, so the following throws a compiler error "A local variable or function named 'message' is already defined in this scope":
switch(value)
{
case 1:
...
0
votes
1answer
81 views
What's the better way to organize retrieval of difference in props
I have a system, which stores different objects in DB. Each such object has properties. Some of them are relevant for all objects (like Name, Description), but some are specific to each object and ...
3
votes
1answer
126 views
Way to hide logic behind class for better readability of method and refactor class to follow SRP
I have an algorithm to create a version for an entity and then I save that version against below 2 entity:
1) Variant
2) Category
interface IEntityVersion
{
string GetVersion();
}
public class ...
1
vote
0answers
61 views
How to make view models more DRY? [closed]
When looking at the WPF view model code samples on the web/books almost all of them show same approach for the bind-able properties that are used for the binding and input in the UI and that often ...
0
votes
1answer
87 views
Network Communication - queue processing thread/task or?
I have an application that is sending messages over a socket from different threads. I create my own wrapper for the socket that enables me to extend functionality.
Example
- on new ...
-2
votes
4answers
151 views
Handling an exception thrown in a catch block [closed]
If I'm writing a method, in C# for example, I will use a try catch block.
Let's say the method adds some numbers but I log exceptions in the catch block. What's the best way to handle an exception ...
0
votes
0answers
58 views
Inherit a class that inherits a generic class to make it easier to read
I'm creating a simple Dependency Injection library for Unity (no constructors available) and I want to use a generic class that implements a generic call for each class that would inherit it allowing ...
1
vote
1answer
57 views
Should all my asp.net MVC controllers use Web APIs?
The thing that I don't understand is the prioritization between MVC Controllers and Web APIs.
Consider I want to make a website. I can either program to APIs and for the presentational layer, force ...
0
votes
0answers
49 views
What's the best way to control distribution/usage of proprietary, internal software?
I was tasked with writing software for my company. As I am now writing a third program (with many more coming), what's the best way to control the distribution/usage of our software?
The software I'...
1
vote
1answer
98 views
Must we define methods and async when we don't know whether the implementation is synchronous or asynchronous?
I think I know the answer to this, but it's particular enough that I don't want to go telling other people stuff until I'm 100% certain.
Suppose I have a class with some dependency:
public interface ...
0
votes
2answers
87 views
Would you use the mediator pattern for this scenario?
I'm wondering if you would use the mediator pattern on the following scenario.
First of at all, the program must call an API, and persist this response on somewhere (it could be a database, a file, ...
0
votes
0answers
52 views
.NET C# – how create stream of object field with ease? [migrated]
I would like to create a stream of object fields. Let say to transfer data over the network in expected binary format.
Serialization is not an option since it carries class information. I need only ...
0
votes
3answers
111 views
How to handle views and logic in a Winform C# app? [closed]
I come from a webdev background so I'm used to MVC to handle the separation between the views and the logic (and the data/models).
I'm starting to develop using Winforms in C# and I want to know what'...
0
votes
1answer
69 views
Appropriate pattern for injector that sets a property and client that ONLY gets a property
Suppose I have a method in client code that expects an interface...
void DoWork(IDataManager data) {
//use IDataManager interface in the DoWork method
}
And the IDataManager interface looks like ...
0
votes
1answer
46 views
Where do I save a Canvas “center position” coordinate in an MVVM architecture?
Assume I have a canvas that has rendered shapes. I can drag-move around that canvas as if I was in a zoomed in image to move all shapes around. Between the Model and ViewModel I have a ServiceLayer (...
1
vote
1answer
80 views
Are separate controllers used when adopting full scale CQRS?
I understand there are three flavours of CQRS:
1) Separate models only i.e. a domain model and a read model.
2) separate models and repositories.
3) Separate models; repositories and physical ...
0
votes
0answers
42 views
How to setup up a background thread/task which triggers UI updates?
Background
I'm designing a round-based game where one of the core design goals is to have a highly exchangable UI. For this, I've defined an interface which allows implementers to only focus on ...
2
votes
2answers
107 views
How to avoid duplication of types in MVVM
I'm learning the MVVM pattern and something that comes up often is a duplication of data-types.
Say I have a Person datatype. Intuitively I want it to look like this:
public class Person
{
...
2
votes
3answers
169 views
How to use a child class property in a function written for base class
in C#, suppose I have written this function
public void TryToTurnOn( Device d )
{
// some common logic
// some more common logic
}
I then have a class that inherit Device that is ...
0
votes
1answer
28 views
Removing unused directives from a file which is not related to the pull request [duplicate]
I'm actually working on the web application which was made using technologies such as asp.net core, c#, angular, ef core. For the version control and CD we use Azure DevOps. As a team we try to follow ...
1
vote
3answers
152 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
2answers
65 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
78 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
164 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
241 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
99 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
50 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 ...
3
votes
3answers
490 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> : ...
3
votes
4answers
167 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
91 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
154 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
418 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
48 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
136 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
55 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
98 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
216 views
Mocking dbContext vs Repository [closed]
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 ...
6
votes
1answer
287 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, ...
