选中验证复选框 [英] Validate checkbox is checked

问题描述

我有3个要验证的复选框，当我单击打印按钮时，至少检查了一个复选框。当我点击打印时，它提示我选择至少一个复选框，当我对它打印的消息说好的时候。我怎么能停止它？

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();
            }
        }

我的尝试：



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What I have tried:

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推荐答案

为什么在选中其中一个复选框之前不禁用Button？

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

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

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