If one checkbox is checked, set the other to unchecked

Question

I have two checkboxes on my form; chkBuried and chkAboveGround. I want to set it up so if one is checked, the other is unchecked. How can I

Answer 1

I needed to show or not show a table when activating the CheckBox, how they were two, if I activated both, everything was fine, but if I tried to deactivate one later, the other was also deactivated. PD: The default value for the tables that I used was Visible=false. The solution I got was the following:

 protected void YourNameOfMethodForBothCheckBox(object sender, EventArgs e)
    {
        if (CheckBox_1.Checked == true)
        {
            Table_1.Visible = true;

            if (CheckBox_2.Checked == true)
            {
                Table_2.Visible = true;
            }
            else { Table_2.Visible = false; }


        }
        else
        {
            Table_1.Visible = false;

            if (CheckBox_2.Checked == false)
            {
                Table_2.Visible = false;
            }
            else
            {
                Table_2.Visible = true;

            }
        }

    }

Answer 2

Better version, allows the user to uncheck boxes.

        private void chkOne_CheckedChanged(object sender, EventArgs e)
        {
            if (chkTwo.Checked == true)
            {
                chkTwo.Checked = !chkOne.Checked;
            }
        }

        private void chkTwo_CheckedChanged(object sender, EventArgs e)
        {
            if (chkOne.Checked == true)
            {
                chkOne.Checked = !chkTwo.Checked;
            }
        }

Answer 3

modify your code as below.

private void chkBuried_CheckedChanged(object sender, EventArgs e)
{
    chkAboveGround.Checked = !chkBuried.Checked;
}
private void chkAboveGround_CheckedChanged(object sender, EventArgs e)
{
    chkBuried.Checked = !chkAboveGround.Checked;
}

Answer 4

I would prefer radio buttons, but you can do something like this:

public void CheckACheckBox(Checkbox ck)
{
    foreach (Control ckb in this.Controls)
    {
       if ((ckb is CheckBox) && (ckb == ck))
          ck.Checked = true;
       else
          ck.Checked = false;
    }
}

Answer 5

The best option and easiest way for me was to create a Click event instead of a CheckedChanged event. This method works perfectly with two or more checkbox and allows to have them all unchecked.

    private void chkOne_Click(object sender, EventArgs e)
    {
        chkTwo.Checked = false;
    }

    private void chkTwo_Click(object sender, EventArgs e)
    {
        chkOne.Checked = false;
    }

Answer 6

I suggest you use check_click instead of check_changed

        private void checkBox1_Click(object sender, EventArgs e)
        {
            checkBox2.Checked = false;
            checkBox3.Checked = false;
        }

        private void checkBox2_Click(object sender, EventArgs e)
        {
            checkBox1.Checked = false;
            checkBox3.Checked = false;
        }

        private void checkBox3_Click(object sender, EventArgs e)
        {
            checkBox1.Checked = false;
            checkBox2.Checked = false;
        }