Validate checkbox is checked

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I have 3 check boxes that i want to validate at least one is checked when i click the print button. when I click print it prompts me to select at least one check box when I say ok to the message it prints anyway.How can i stop that?

<pre>private void btnPrint_Click(object sender, EventArgs e)
        {

            try
            {

                if (checkBox1.Checked)
                    if (checkBox2.Checked)
                if (checkBox3.Checked)
                    {

                    }
                if (!checkBox1.Checked && !checkBox2.Checked && !checkBox3.Checked)
                {
                    MessageBox.Show("Please select at least one!");
                }
            }


            catch (Exception ex)
            {

                printDocument1.PrintPage += printDocument1_PrintPage;
                printDocument1.Print();
            }
        }

What I have tried:

Related entries and internet search

Posted 9-Aug-17 5:32am

Member 12349103

Updated 9-Aug-17 5:38am

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Graeme_Grant · Accepted Answer · 2017-08-09T05:38:00

Solution 1

Why don't you disable the Button until one of the checkboxes are checked?

C#

private void CheckChanged(object sender, EventArgs e)
{
    button1.Enabled = checkBox1.Checked || checkBox2.Checked || checkBox3.Checked;
}

Posted 9-Aug-17 5:38am

Graeme_Grant

Comments

Member 12349103 9-Aug-17 12:35pm

How would i use that in the above code?

Graeme_Grant 9-Aug-17 12:50pm

point all 3 checkbox CheckChanged events to the above method and set the Button.IsEnabled state to false. When one of the checks are ticked, the button is enabled, if all are then unticked, the button is disabled.

Member 12349103 9-Aug-17 16:19pm

Thanks that did the trick

Graeme_Grant 9-Aug-17 17:07pm

Glad to hear! :)