How to choose the Nth picturebox-CodePudding

I am trying to make a memory game. I have 16 different pictureboxes(pbx1, pbx2...).

And now I am trying to make them revert to questionmarks after a wrong guess. This is what I've so far done:

        void questionMarker(int lastBoxCLicked)
    {
        if(lastBoxClicked == 1)
        {
            pbx1.Image = Image.FromFile("../Bilder/Frågetecken.png");
        }
        else if(lastBoxClicked == 2)
        {
            pbx2.Image = Image.FromFile("../Bilder/Frågetecken.png");
        }
        else if (lastBoxClicked == 3)
        {
            pbx3.Image = Image.FromFile("../Bilder/Frågetecken.png");
        }
        else if (lastBoxClicked == 5)
        {
            pbx4.Image = Image.FromFile("../Bilder/Frågetecken.png");
        }
    }

But this becomes quite tedious and horrendous to look at as I have 16 pbx'es. Is there any way to write it like this?:

        void questionMarker(int lastBoxClicked)
    {
        pbx[lastBoxClicked].Image = Image.FromFile("../Bilder/Frågetecken.png");
    }

If I put this code in it just says that there is nothing named pbx.

CodePudding user response：

Try this:

PictureBox[] PictureBoxArray = new PictureBox[3];

This creates an array of 3 picture boxes called PictureBoxArray.

You can loop through like an ordinary array or access certain picture boxes using PictureBoxArray[i]

CodePudding user response：

After your update, i think you have a click handler of the PictureBox. If that's true you just need

void PictureBox_Click(object sender, EventArgs e)
{
    ((PictureBox)sender).Image = Image.FromFile("../Bilder/Frågetecken.png");
}

If that's not possible and you insist in using your approach:

void QuestionMarker(int lastBoxCLicked)
{
    PictureBox[] allPb = parentControl.Controls.OfType<PictureBox>().ToArray();
    PictureBox clicked = allPb.ElementAtOrDefault(lastBoxCLicked-1); // index is zero based
    if(clicked != null)
    {
        clicked.Image = Image.FromFile("../Bilder/Frågetecken.png");
    }
}

You need to add using System.Linq.

CodePudding user response：

Just use the "recurse" option of Controls.Find(). This will find the control "by name" no matter where or how deeply nested it is on the form:

Image questionMark = Image.FromFile("../Bilder/Frågetecken.png");

void questionMarker(int lastBoxCLicked)
{
    PictureBox pb = this.Controls.Find("pbx"   lastBoxCLicked, true).FirstOrDefault() as PictureBox;
    if (pb != null)
    {
        pb.Image = questionMark;
    }
}