Question

For a school project, I have to make a table reservation system,
I made the following (just a small part).

PictureBox[] pb = new PictureBox[70] { pictureBox1, pictureBox2, pictureBox3,etc..  };
foreach (PictureBox p in pb)
{
    p.BorderStyle = BorderStyle.Fixed3D;
    p.BackColor = Color.White;
    p.MouseEnter += new EventHandler(mouseOn);
    p.MouseClick += new MouseEventHandler(mouseClick);
}

private void mouseOn(object sender, EventArgs e)
{
    ((PictureBox)sender).BackColor = Color.Green;
}

private void mouseClick(object sender, EventArgs e)
{
    reservationForm rf = new reservationForm();
    rf.ShowDialog();
}

I chose for pictureboxes to represent the tables, the default BackColor is white, and when the mouse enters the BackColor turns green.

When you click on 1 of those PictureBoxes my reservationForm will open, this is where you can further fill in the details to book the table.

but the part where I get stuck now is that I don’t know on my reservation form which PictureBox I clicked, so I need to get something like the index of the PictureBox array.

How do I fix this?

Answer 1

You know how to do it! 🙂

You’re already doing it correctly on the mouseOn event handler. Just do the same cast of the sender parameter.

private void mouseClick(object sender, EventArgs e)
{
    PictureBox clickedBox = (PictureBox)sender;

    reservationForm rf = new reservationForm();
    rf.ShowDialog();
}

If you need the index, you can use Array.IndexOf, assuming your pb array is a class level variable and not a method local.

int index = Array.IndexOf(pb, clickedBox);