C#•8mo ago

✅ Help with windows forms check uncheck thing

I want it to be where only 1 checkbox can be checked at a time, I tried this but it is not working, any help?

        private void checkBox2_CheckedChanged(object sender, EventArgs e)
        {
            if(checkBox2.Checked && (checkBox3.Checked || checkBox4.Checked || checkBox5.Checked))
            {
                checkBox2.Checked = false;
            }
        }

        private void checkBox2_CheckedChanged(object sender, EventArgs e)
        {
            if(checkBox2.Checked && (checkBox3.Checked || checkBox4.Checked || checkBox5.Checked))
            {
                checkBox2.Checked = false;
            }
        }

6 Replies

oke•8mo ago

rather than going through each checkbox and checking its state, you can just set any box that isnt the one just clicked, and make them unchecked this solution kind of assumes you mean every box in the form

private void anyCheckBox_CheckedChanged(object sender, EventArgs e)
{
    CheckBox clickedCheckbox = (CheckBox)sender;

    foreach (Control control in this.Controls)
        if (control is CheckBox && control != clickedCheckbox)
            ((CheckBox)control).Checked = false;
}

private void anyCheckBox_CheckedChanged(object sender, EventArgs e)
{
    CheckBox clickedCheckbox = (CheckBox)sender;

    foreach (Control control in this.Controls)
        if (control is CheckBox && control != clickedCheckbox)
            ((CheckBox)control).Checked = false;
}

Ethan•8mo ago

that makes sense, and yeah i do want it for all the checkboxes. Thank you very much if i wanted to exclude 1 checkbox how could i do that? i did forget about 1

oke•8mo ago

if you need this on specific boxes, your best bet would be to assign references to them in an array via the classes constructor

private CheckBox[] boxes;
public Form1()
{
    InitializeComponent();
    boxes = [
        // Possible checkbox
        // checkBox1
        checkBox2,
        checkBox3,
        checkBox4,
        checkBox5
    ]
}

private void checkBox2_CheckedChanged(object sender, EventArgs e)
{
    foreach (var box in boxes)
        box.Checked = false;

    ((CheckBox)sender).Checked = true;
}

private CheckBox[] boxes;
public Form1()
{
    InitializeComponent();
    boxes = [
        // Possible checkbox
        // checkBox1
        checkBox2,
        checkBox3,
        checkBox4,
        checkBox5
    ]
}

private void checkBox2_CheckedChanged(object sender, EventArgs e)
{
    foreach (var box in boxes)
        box.Checked = false;

    ((CheckBox)sender).Checked = true;
}

Ethan•8mo ago

thank you

oke•8mo ago

yw when your ready, you can use /close to $close this thread

MODiX•8mo ago

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✅ Help with windows forms check uncheck thing