Check box validation

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I've got three checkboxes and I need validation so that you can only text one of them. I've got the code so you can only select one of the text boxes (that code looks like this)

C#

private void toc_Blockleave_CheckedChanged(object sender, EventArgs e)
       {
           if (toc_Blockleave.Checked == true)
           {
               toc_Swap.Checked = false; toc_Unavailability.Checked = false;
           }

however I need it so that when btn_Submit is clicked you must have one of the tickboxes selected (you can only select one due to the above code) and it returns a Messagebox.

This is what I tried

C#

if (!(rdo_ApplySelectedCodeToRD.Checked & rdo_LeaveRDAlone.Checked & rdo_SetRDToZR.Checked))
            {
                MessageBox.Show("You must choose a Rest Day Option");
                return;
            }

as well as various other methods but I just can't get it work

C#

if (toc_Blockleave.Checked & toc_Swap.Checked & toc_Unavailability.Checked == false )
            {
                MessageBox.Show("You must choose a Type of Change");
                return;
            }

I tried this and it only worked for one of the boxes and not the toher two.

Thanks :3

Posted 3-Mar-14 0:00am

Member 10603307

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phil.o · Accepted Answer · 2014-03-03T00:16:00

I would use just one event handler for all three checkboxes (btw, you know radio buttons would fit better here, don't you?) and validate using XOR function.

This way:

C#

private void CheckBox_CheckedChanged(object sender, EventArgs e) {
   CheckBox box = (CheckBox)sender;
   if (box != null) {
      if (box.Checked) {
         if (box == toc_Blockleave) {
            toc_Swap.Checked = false;
            toc_Unavailability.Checked = false;
         }
         else if (box == toc_Swap) {
            toc_Blockleave.Checked = false;
            toc_Unavailability.Checked = false;
         }
         else if (box == toc_Unavailability) {
            toc_Blockleave.Checked = false;
            toc_Swap.Checked = false;
         }
      }
   }
   btn_Submit.Enabled = toc_Blockleave.Checked ^ toc_Swap.Checked ^ toc_Unavailability.Checked;
}

Hope this helps.

Paddy84 · Accepted Answer · 2014-03-03T00:09:00

Solution 1

Use == false for each CheckBox

C#

if (rdo_ApplySelectedCodeToRD.Checked == false && rdo_LeaveRDAlone.Checked == false && rdo_SetRDToZR.Checked == false)
            {
                MessageBox.Show("You must choose a Rest Day Option");
                return;
            }

Posted 3-Mar-14 0:09am

Paddy84

King Fisher · Accepted Answer · 2014-03-03T00:10:00

Solution 2

C#

if (toc_Blockleave.Checked ==false && toc_Swap.Checked==false && toc_Unavailability.Checked == false )
{

}

use '&&' operator not'&'

Posted 3-Mar-14 0:10am

King Fisher

Updated 3-Mar-14 0:11am

v2