All Questions
76
questions
1
vote
3
answers
510
views
Trying to add a node to a graph
I am implementing a Graph via adjacency list, and I am trying to add a node to a Graph class but I keep getting an error
System.NullReferenceException has been thrown
this is the bit of my code:
...
- 29
0
votes
1
answer
196
views
when trying to iterate a list of objects which contains a list of object and if i add a value to inner list all objects get same value
my code is like this:
for(updatedDetails ud in meUD)
{
Details s = 8;
ud.Details.add(s);
}
meUD is List of object updatedDetails
which has a list of object Details
If I run that loop, instead of ...
-2
votes
2
answers
221
views
Object as a parameter without declaring a variable
Why is it possible to create a new object and use it as a parameter WITHOUT declaring "pathVariable"?
ExcelPkg.SaveAs(new FileInfo(@"D:\New.xlsx"))
Otherwise, code below causes an ...
- 101
-4
votes
2
answers
142
views
What is the cleanest way to abort a construction of a new object in c#, and instead return a reference to an object that already exists?
I would like for a constructor to somehow abort the construction of a new object, and instead return a reference to an object that already exists. What is the cleanest way to do this?
- 292
0
votes
0
answers
80
views
Are instances and objects the same thing? [duplicate]
I keep hearing the words instances and objects, don't they have the same meaning or not?
For example, if I want to initialize an object of a class, I use the new operator to initialize an object with ...
0
votes
1
answer
498
views
Accessing value of object/instance of a class, made by using method from another class
I've been trying to do this multiple times in my recent project, since I'm currently experimenting on how can I keep my main function in the main class as clean and tidy as possible, while making use ...
- 5
0
votes
1
answer
76
views
Unable to call method's objects into the Form
As you can see I instantiated the classes I need into the form_load, in order to use methods and classes features. The problem is that I need to Call the item NuovoCliente from CreateClientemethod, ...
0
votes
1
answer
60
views
Is there a difference between an Instance and an Object in C#? [closed]
I'm studying the OOP aspect of C# and I would like to know if there is a difference between and Instance and an Object?
0
votes
2
answers
45
views
C# Object Intantiation format question declaring a variable vs not declaring a variable [closed]
I am new to C# and I think I am seeing 2 diferent ways to do the same thing or maybe I just am not understanding. My "Murach's C# 2015" book has on page 369 an example of creating 2 object instances ...
- 179
1
vote
2
answers
511
views
Object instance from one class being changed from another class
I have a class called FrameSelector, which just stores a "path" to iframes on a web page. This class contains an instance of FramePath which is the actual path to the current frame.
I instantiate an ...
- 37
0
votes
1
answer
561
views
C#: Multiple class instances all doing the same thing
I have 3 different classes: Entity, Control and Environment
Inside the Entity class, I have a Control variable:
readonly Control m_Control
Inside the constructor of my Entity class, I'm ...
- 43
0
votes
0
answers
35
views
Is there any way to search from list of instances and display a specific one with user input
I have created a class (C#) "class Car" and created 3 instances of that class.
Car mycar,Car my2car,Car my3car.I have also given them the properties.Make,model,Year and Color.
Like this (it is one of ...
0
votes
4
answers
105
views
Add one object to multiple arrays and keep differences between each copy?
Basically, I want to create one object, and then add that object to a bunch of different arrays, and be sure that if one array changes the object's values, the other objects in other arrays don't ...
- 123
0
votes
1
answer
55
views
C# (wpf) after creating object instance i can not reuse it
I am working on small project, and I am trying to use object to store data. Its only: name, year and price to be stored (max 10 items).
//On click I get user input and I create new object instance
//...
- 61
-1
votes
1
answer
132
views
Object’s Parent Current Instance
Having the following object(s):
public class Employee
{
public string LastName { get; set; } = "";
internal class SubordinateList<T> : List<T>, IPublicList<T> where T : ...
