Question

我有几个复选框和一个文本框。当我选中某个复选框时，它将禁用文本框和其他指定的复选框。

该代码适用于文本框。当我添加else语句时，它仍适用于文本框，但不适用于复选框。如果我省略else并仅使用if禁用它们，则可以正常工作。如果取消选中该复选框，我需要它重新启用它们。

我在面板中找到了所有相关的复选框。

    private void noModemChkbox_CheckedChanged(object sender, EventArgs e)
    {
        if (noModemChkbox.Checked == true)
        {
            custModemText.Enabled = false;
            pwrCbx.Enabled = false;
            e1Cbx.Enabled = false;
            e2Cbx.Enabled = false;
            e3Cbx.Enabled = false;
            e4Cbx.Enabled = false;
            dslblinkCbx.Enabled = false;
            enetCbx.Enabled = false;
            dslCbx.Enabled = false;
            inetCbx.Enabled = false;
            inetredCbx.Enabled = false;
            wlanCbx.Enabled = false;
            activityChkbox.Enabled = false;
        }
        else
            custModemText.Enabled = true;
        pwrCbx.Enabled = true;
        e1Cbx.Enabled = true;
        e2Cbx.Enabled = true;
        e3Cbx.Enabled = true;
        e4Cbx.Enabled = true;
        dslblinkCbx.Enabled = true;
        enetCbx.Enabled = true;
        dslCbx.Enabled = true;
        inetCbx.Enabled = true;
        inetredCbx.Enabled = true;
        wlanCbx.Enabled = true;
        activityChkbox.Enabled = true;
    }

Answer 1

你忘了在else语句周围加上括号：

private void noModemChkbox_CheckedChanged(object sender, EventArgs e)
{
    if (noModemChkbox.Checked == true)
    {
        custModemText.Enabled = false;
        pwrCbx.Enabled = false;
        e1Cbx.Enabled = false;
        e2Cbx.Enabled = false;
        e3Cbx.Enabled = false;
        e4Cbx.Enabled = false;
        dslblinkCbx.Enabled = false;
        enetCbx.Enabled = false;
        dslCbx.Enabled = false;
        inetCbx.Enabled = false;
        inetredCbx.Enabled = false;
        wlanCbx.Enabled = false;
        activityChkbox.Enabled = false;
    }
    else
    {
        custModemText.Enabled = true;
        pwrCbx.Enabled = true;
        e1Cbx.Enabled = true;
        e2Cbx.Enabled = true;
        e3Cbx.Enabled = true;
        e4Cbx.Enabled = true;
        dslblinkCbx.Enabled = true;
        enetCbx.Enabled = true;
        dslCbx.Enabled = true;
        inetCbx.Enabled = true;
        inetredCbx.Enabled = true;
        wlanCbx.Enabled = true;
        activityChkbox.Enabled = true;
    }
}

这不是更简单吗？：

private void noModemChkbox_CheckedChanged(object sender, EventArgs e)
{
    bool bEnabled = !noModemChkbox.Checked;

    custModemText.Enabled = bEnabled;
    pwrCbx.Enabled = bEnabled;
    e1Cbx.Enabled = bEnabled;
    e2Cbx.Enabled = bEnabled;
    e3Cbx.Enabled = bEnabled;
    e4Cbx.Enabled = bEnabled;
    dslblinkCbx.Enabled = bEnabled;
    enetCbx.Enabled = bEnabled;
    dslCbx.Enabled = bEnabled;
    inetCbx.Enabled = bEnabled;
    inetredCbx.Enabled = bEnabled;
    wlanCbx.Enabled = bEnabled;
    activityChkbox.Enabled = bEnabled;
}

Answer 2

您需要围绕其他人使用括号，如下所示：

else
{
    custModemText.Enabled = true;
    pwrCbx.Enabled = true;
    e1Cbx.Enabled = true;
    e2Cbx.Enabled = true;
    e3Cbx.Enabled = true;
    e4Cbx.Enabled = true;
    dslblinkCbx.Enabled = true;
    enetCbx.Enabled = true;
    dslCbx.Enabled = true;
    inetCbx.Enabled = true;
    inetredCbx.Enabled = true;
    wlanCbx.Enabled = true;
    activityChkbox.Enabled = true;
}

您的原始代码实际上被解释为：

else
{
    custModemText.Enabled = true;
}

pwrCbx.Enabled = true;
e1Cbx.Enabled = true;
e2Cbx.Enabled = true;
e3Cbx.Enabled = true;
e4Cbx.Enabled = true;
dslblinkCbx.Enabled = true;
enetCbx.Enabled = true;
dslCbx.Enabled = true;
inetCbx.Enabled = true;
inetredCbx.Enabled = true;
wlanCbx.Enabled = true;
activityChkbox.Enabled = true;

Answer 3

在else子句中你需要括号{}（如果你有多个语句）：

private void noModemChkbox_CheckedChanged(object sender, EventArgs e)
{
    if (noModemChkbox.Checked == true)
    {
        custModemText.Enabled = false;
        pwrCbx.Enabled = false;
        e1Cbx.Enabled = false;
        e2Cbx.Enabled = false;
        e3Cbx.Enabled = false;
        e4Cbx.Enabled = false;
        dslblinkCbx.Enabled = false;
        enetCbx.Enabled = false;
        dslCbx.Enabled = false;
        inetCbx.Enabled = false;
        inetredCbx.Enabled = false;
        wlanCbx.Enabled = false;
        activityChkbox.Enabled = false;
    }
    else
    {
        custModemText.Enabled = true;
        pwrCbx.Enabled = true;
        e1Cbx.Enabled = true;
        e2Cbx.Enabled = true;
        e3Cbx.Enabled = true;
        e4Cbx.Enabled = true;
        dslblinkCbx.Enabled = true;
        enetCbx.Enabled = true;
        dslCbx.Enabled = true;
        inetCbx.Enabled = true;
        inetredCbx.Enabled = true;
        wlanCbx.Enabled = true;
        activityChkbox.Enabled = true;
    }
}

在CheckedChange事件上禁用/启用多个项目

3 个答案: