我正在尝试创建具有各种单选按钮作为不同选项的体育馆会员资格。我希望用户能够选择计算按钮以及在文本框中显示的费用,但是由于某种原因,如果我声明将所有单选按钮费用加在一起而不是仅由用户选择的话,那么我就可以了。 >
private void calculatebutton_click(object sender, eventargs e)
{
int membershipcost = 0;
if (basicradiobutton.checked);
membershipcost += 10;
if (regularradiobutton.checked);
membershipcost += 15;
if (premiumradiobutton.checked);
membershipcost += 20;
membershipcosttxtbx.text = membershipcost.tostring();
答案 0 :(得分:1)
您需要从if语句中删除分号,或像这样设置代码格式:
private void calculatebutton_click(object sender, eventargs e)
{
int membershipcost = 0;
if (basicradiobutton.checked)
{
membershipcost += 10;
}
if (regularradiobutton.checked)
{
membershipcost += 15;
}
if (premiumradiobutton.checked)
{
membershipcost += 20;
}
membershipcosttxtbx.text = membershipcost.tostring();
}
答案 1 :(得分:0)
您的C#编写不正确。我建议使用{
和}
来定义与if
条件相关的代码块。您可以创建一行if
语句,该语句已包含在第二个if
中。将;
放在if(...)
之后将导致该语句不执行任何操作。
private void calculatebutton_click(object sender, eventargs e)
{
int membershipcost = 0;
if (basicradiobutton.checked)
{
membershipcost += 10;
}
if (regularradiobutton.checked) membershipcost += 15;
if (premiumradiobutton.checked)
{
membershipcost += 20;
}
membershipcosttxtbx.text = membershipcost.tostring();
}