c# - C# UserControl Not 和 Yes 带文本

Question

默认为无复选框

当我运行程序并单击是复选框时，程序溢出

private void checkEdit1_Click(object sender, EventArgs e)
        {
            checkEdit2.Checked = false;
            textEdit1.Enabled = true;
            answered = true;
            optional = textEdit1.Text;

            if (!checkEdit1.Checked)
            {
                checkEdit1.Checked = true;
                checkEdit2.Checked = false;
                textEdit1.Enabled = true;
                optional = textEdit1.Text;
            }

        }

        private void checkEdit2_Click(object sender, EventArgs e)
        {
            checkEdit1.Checked = false;
            textEdit1.Enabled = false;
            answered = false;

            if (!checkEdit2.Checked)
            {
                checkEdit2.Checked = true;
                checkEdit1.Checked = false;
                textEdit1.Enabled = false;
                answered = false;
            }

        }

你认为是什么错误？

Answer 1

而不是Click事件，您应该CheckedChanged以这种方式使用事件：

checkEdit1.CheckedChenged += new EventHandler(checkEdit1_CheckedChanged);
checkEdit2.CheckedChenged += new EventHandler(checkEdit2_CheckedChanged);

---

private void checkEdit1_CheckedChanged(object sender, EventArgs e)
{
    if(checkEdit1.Checked == checkEdit2.Checked)
      checkEdit2.Checked = !checkEdit.Checked;
}

private void checkEdit2_CheckedChanged(object sender, EventArgs e)
{
    if(checkEdit1.Checked == checkEdit2.Checked)
      checkEdit2.Checked = !checkEdit.Checked;
}

但在这种情况下，最好的方法是使用一组单选按钮。

Answer 2

假设这些方法已连接到checkEdit1并且checkEdit2我建议您不要更改checkEdit1incheckEdit1_Click因为它已经更改 - 仅修改备用的状态。

然而，当你修改对方的状态时，除非你小心，否则你会被回调。最终计算机放弃了——溢出！

正如@Cyborgx37 的评论中提到的，单选按钮是这里更好的用户体验选择！

一种可能的解决方案，将单个方法绑定到 OnClick to BOTH 复选框：

private bool internallyUpdating = false;

private void CheckboxClick(object sender, EventArgs e)
{
    if ( !internallyUpdating )
    {
        // Prevent subsequent changes
        internallyUpdating = true;

        // Exchange 'checked' state
        if ( sender == checkEdit1 )
        {
            checkEdit2.Checked = !checkEdit2.Checked;
        } 
        else // if (sender == checkEdit2)
        {
            checkEdit1.Checked = !checkEdit1.Checked;
        }

        // other logic here..

        // restore 'on change' functionality.
        internallyUpdating = false;
    }