CODEWITHSUNDEEP
c#reference
maxp
maxp

Reputation: 25141

Construct object without reference?

Im almost certain this defies the basic laws of C#, but is it possible to construct an 'array' or 'collection' of items by reference?

Failing that, is there any other way to construct the checkboxes in a parametered static method?

Hopefully my psuedocode makes sense (everything concerning Construct2)

CheckBox cb = null, cb2 = null;

Main()
{
    Construct(ref cb);//works
    Construct2(new []{ref cb, ref cb2});//isnt going to work!
}

static void Construct(ref CheckBox cb){
    cb = new CheckBox();//works
}

static void Construct2(CheckBox[] cbs) { //
    cbs[0] = new CheckBox();
    cbs[1] = new CheckBox();
    //for (int i = 0; i < cbs.Length;i++){
    //    cbs[i] = new CheckBox();
    //}
}

Upvotes: 1

Views: 82

Answers (3)

mclark1129
mclark1129

Reputation: 7592

I do not believe this is possible in C#. In order to use pointers you have to declare your code within an unsafe context, and compile the application with /unsafe. However, this would only work for a value type such as a struct and would not work for managed objects (which is Checkbox and most everything you would probably use).

Upvotes: 1

D Stanley
D Stanley

Reputation: 152521

Failing that, is there any other way to construct the checkboxes in a parametered static method?

Yes, have the method return an array of checkboxes instead of trying to pass in a reference.

static CheckBox[] Construct2()
{
    //....
}

Upvotes: 1

Rawling
Rawling

Reputation: 50114

You can't pass an array of ref variables like that. If you want to be able to construct "into" multiple variables like that I think you'll need to pass in setters of some kind:

void Construct2 (params Action<Checkbox>[] cbas)
{
    foreach (var cba in cbas) cba(new Checkbox());
}

Construct2(
    (c) => cb = c,
    (c) => cb2 = c);

Upvotes: 3

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