I have been creating arrays for different controls as follows, e.g:
private TextBox[] Array_TextBoxes;
private CheckBox[] Array_CheckBoxes;
private RadioButtonList[] Array_radioButton;
Array_TextBoxes= new TextBox[4];
Array_CheckBoxes= new CheckBox[5];
Array_radioButton= new RadioButtonList[10];
Is there any ways of creating them so that I do not need to specify the size/length? I.e. is it possible to make these control arrays variable sized?
Thanks!
Arrays must be assigned a length, if you want to allow for any number of elements use the List class, like this
List<TextBox> textBoxList=new List<TextBox>();
and add controls into this collection
textBoxList.Add(new TextBox());
You could start them as lists then convert to array:
Add stuff to these using .Add:
List<TextBox> _TextBoxes = new List<TextBox>();
List<CheckBox> _CheckBoxes = new List<CheckBox>();
List<RadioButtonList> _RadioButton = new List<RadioButtonList>();
Then convert to arrays:
TextBox[] Array_TextBoxes = List<TextBox> _TextBoxes.ToArray();
CheckBox[] Array_CheckBoxes = List<CheckBox> _CheckBoxes.ToArray();
RadioButtonList[] Array_radioButton = List<RadioButtonList> _radioButton.ToArray();
Or just use lists...
List<>, as others have suggested, is a good idea, but it does have some overhead. You can also do this, if you "use" System.Linq, and assume that the controls variable points to a collection of the controls:
Array_TextBoxes = controls.OfType<TextBox>().ToArray();
Furthermore, if you prefer to have lists instead of arrays, you can do that too:
List<TextBox> textBoxes = controls.OfType<TextBox>().ToList();
Finally, it's often considered poor style to use prefixes like "Array_" in your field and variable names.
System.Collections.Generic.List<T>- msdn.microsoft.com/en-us/library/…