Question

please consider that this is my first very post and that I´m a newcomer in C#

I’m creating a UserControl with several pictureBoxes. These objects are automatically named pictureBox1, pictureBox2, pictureBox3 and so on.

Now i want to change the associated image by clicking:

pictureBox1.Image = Properties.Resources.i51; 

so far, so good. But how to assigne the number without writing a single line for each event?

pictureBox(1).Image = Properties.Resources.i51;

doesn´t work, and lots of others don´t too.

any hint? Many thanks in advance!

Answer 1

Fill all your picture boxes into a list like msmolka already provided and also add a ReadyOnlyCollection to it:

private List<PictureBox> _PictureBoxes;
private ReadOnlyCollection<PictureBox> _PictureBoxesReadOnly;

Instantiate it within the constructor:

public MyUserControl()
{
     InitializeComponent();
     _PictureBoxes = new List<PictureBox>();
     _PictureBoxesReadOnly = _PictureBoxes.AsReadOnly();
}

And make the ReadOnlyCollection only available as IList:

public IList<PictureBox> PictureBoxes
{
    get { return _PictureBoxesReadOnly; }
}

This is (in my eyes) better than the approach from msmolka. For making it perfect i would also not give the whole PictureBoxes to the outer world, but instead only the Images as a BindingList. But i think for a beginner you can start with the above and maybe improve this stuff later.