All Questions
Tagged with constructors c#
32 questions
3
votes
4
answers
348
views
Primary constructors for depedency injection
Microsoft identifies dependency injection as one of the uses for primary constructors.
public class ExampleController(IService service) : ControllerBase
{
[HttpGet]
public ActionResult<...
- 259
-1
votes
1
answer
2k
views
How are parameters values passed into a MVC controller constructor?
For this MS sample code, I have checked Program.cs, Startup.cs, and other config files, don't see how the two parameters sqlQueryService and sqlCommandService are populated. Appreciate if someone can ...
- 101
-2
votes
1
answer
300
views
Why aren't constructors atomic? [closed]
If thrown exceptions in constructors can lead to memory leaks or partially-constructed objects, then why we don't make them atomic? so neither an object nor it's local variables will get created/...
- 99
-1
votes
1
answer
113
views
Doing work when passing constructor arguments
This is very closely linked to the question Legitimate "real work" in a constructor? but not quite the same.
I am interested in having feedback on whether this is acceptable or has any risks....
- 109
22
votes
4
answers
5k
views
Constructing an object: should I expose or hide parameters passed to the constructor?
I've a habit I just mechanically do without even thinking too much about it.
Whenever a constructor is waiting for some parameters, I consider this a public information that should be available by ...
- 331
-2
votes
2
answers
529
views
C# Static & Constructor Logic [closed]
I learn C# and try to understand the logic between static and Constructor right now. One thing I need ask you about an example which I will give at below. (please ignore the quality of code or how ...
1
vote
2
answers
333
views
Performing serial communication in constructor to initialize an object
I have a class UnitInfo which represents a collection of unit information with methods to get the unit information in a structured way, such as a specific encoding, etc. This unit info consists of ...
- 281
2
votes
3
answers
5k
views
Should a class constructor ever create objects of other classes? [duplicate]
Is it ever good or bad to have a constructor create new instances of classes that it needs versus passing in a reference that you want the new class to have ?
So basically it's the difference between:...
- 2,092
8
votes
4
answers
706
views
Checking the result of a constructor in C#
I'm working on a code base with a coworker who has a habit of checking the results of a constructor for a null in a fashion similar to this
Person p = new Person();
if (p != null)
{
p.Name = "...
- 653
2
votes
4
answers
872
views
What do OOP languages gain from having constructors that always return an object?
In what seems like a deliberate design decision, C++ does not have a null value for objects and references. This makes using objects and references very elegant since we don't have to perform null ...
- 181
1
vote
1
answer
185
views
Am I waiting for the new C# 8 'record' feature?
I'd like an immutable class, or rather a class whose properties are initialised (whether they have public/private setters or not), in the constructor:
public class MyClass
{
public string ...
- 2,351
1
vote
0
answers
514
views
Are constructors with complex initialization logic always bad? [duplicate]
I've recently read this blog post regarding what a constructor should do and I am also reading Eric Evans' book on Domain Driven Design.
Both the blog post and the book state that a constructor ...
- 124
3
votes
4
answers
5k
views
Public static method calls private constructor
I'm working in a C# codebase that was largely written by a former developer and this pattern is used extensively...
public class AuditInserter
{
public static void Insert(
DataContext ...
- 176
33
votes
3
answers
19k
views
Optional parameters or overloaded constructors
I am implementing a DelegateCommand, and when I was about to implement the constructor(s), I came up with the following two design choices:
1: Having multiple overloaded constructors
public ...
user277671
12
votes
2
answers
8k
views
Unit Test to test the creation of a Domain Object
I have a Unit Test, which looks like this:
[Test]
public void Should_create_person()
{
Assert.DoesNotThrow(() => new Person(Guid.NewGuid(), new DateTime(1972, 01, 01));
}
I am asserting that ...
- 7,139