Accessing checkboxes with variables

Question

I have asked this question previously but for VB.NET here:

Now I want to do the same but in C# and with CheckBoxes so for example, if I have 31 check boxes labeled "CheckBox1...CheckBox31" I could do :

for (int i = 0; i < 10; i++)
{
    (CheckBox + i).Enabled = false;
}

Thanks for any suggestions.

Ok, I tried it and it gave the error 'CheckBox' is a type, which is not valid in the given context" — Jackster, Mar 03 '18 at 12:42

tchelidze · Accepted Answer · 2018-03-03T12:49:23.807

1

Try following

 for (int i = 0; i < 10; i++)
 {
    ((CheckBox)this.Controls[$"CheckBox{i}"]).Enabled = false;
 }

edited Mar 03 '18 at 12:49

answered Mar 03 '18 at 12:43

tchelidze

8,050
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You probably should use `(CheckBox)this.Controls[...]` instead of `this.Controls[...] as CheckBox` because `as` returns `null` if the Element doesn't exist, as described in [this post](https://stackoverflow.com/a/132467/8649828) – kwyntes Mar 03 '18 at 12:48

kwyntes · Answer 2 · 2018-03-22T08:09:24.823

You can try creating a List<CheckBox> or an array of all checkboxes:

for (int i = 0; i < checkbox_array.Length; i++) {
    checkbox_array[i].Enabled = false;
}

EDIT: I might be a bit late, but if you put all CheckBoxes in a GroupBox (wich I really recommend doing if you have soo many checkboxes), you can just loop trough all the controls in that groupbox like this:

foreach (CheckBox cbx in gbxCheckBoxes.Controls) {
    cbx.Enabled = true;
}

or like this: (if you only need to enable them)

gbxCheckBoxes.Enabled = false;

(gbxCheckBoxes is the GroupBox I was talking about)

Accessing checkboxes with variables

2 Answers2