Method that assigns a value to a variable in all classes in a list

Question

I have a list of classes.

For Example:

public class Object()
{
    public string a;
    public string b;
}

public List<Object> Objects = new list<Object>();

What I want is a Method that can set the string a in each Object in the List to Object[0].a;

And I want to do this to b and a lot of other vars too with a single Method. (Other var types to, with only one Method) is this possible?

If you want, you can make a default constructor for your class Object but to have something inside you list you neew to add one. — thelittlewozniak, Feb 04 '19 at 20:41
Look into some tutorials about assignments (of variables/fields/properties) and loops. Also, don't name your class "Object" unless you thoroughly enjoy confusing yourself. (There already exists another class named "Object" in the .NET environment.) — , Feb 04 '19 at 20:41
Sounds like a job for `foreach`. You can iterate over all objects in the list, and set the properties on each of them. — GolezTrol, Feb 04 '19 at 20:42
You will regret naming your class `Object`. Many source code files start with `using System;`, and `System.Object` is the base class of (nearly) all types in the .NET Framework. I strongly suggest picking another name. — Flydog57, Feb 04 '19 at 20:51

score -1 · Answer 1 · answered Feb 04 '19 at 21:33

Let's say you want a list of ten of those Object (unfortunately named) class instances in a list, and you want them all to have the a property set to "Foo". You can use Enumerable.Range to create an enumeration with ten elements, then Select to create the objects. When creating the object, you can initialize the a property using initializer syntax. Once they are created you can create the list with ToList.

Technically this is one line of code although for readability it may be a good idea to span it across a few visual lines.

List<Object> myList = Enumerable
    .Range(0,10)
    .Select
    (
        i => new Object { a = "Foo" }
    )
    .ToList();

Method that assigns a value to a variable in all classes in a list

1 Answers1