控件不能从一个案例标签（'default：'）转到另一个案例标签 [英] control cannot fall through from one case label ('default:') to another
问题描述
private void PlaceRandom（）
{
int r，c;
r = 10; c = 10;
int i = 0;
ar = 0;
ac = 0;
随机rnd = new Random（）;
int val;
while（i< 8）
{
val = rnd.Next（9）;
if（numNotExists（val）== true && val> 0）
{
pos [ar，ac] = val;
开关（val）
{
案例1：
lbl1.Location = new Point（c，r）;
break;
case 2：
lbl2.Location = new Point（c，r）;
休息;
案例3：
lbl3.Location = new Point（c，r）;
休息;
案例4：
lbl4.Location = new Point（c，r）;
休息;
案例5：
lbl5.Location = new Point（c，r）;
休息;
案例6：
lbl6.Location = new Point（c，r）;
休息;
案例7：
lbl7.Location = new Point（c，r）;
休息;
案例8：
lbl8.Location = new Point（c，r）;
休息;
默认：
}
c + = 100;
ac ++;
if（ac> 2）
{
ac = 0;
ar ++;
}
如果（c> 300）
{
c = 10;
r + = 100;
}
i ++;
}
其他
继续;
}
lblBlank.Location = new Point（c，r）;
pos [2,2] = 9;
}
它显示错误控制不能从一个案例标签中掉落（'默认：'）到另一个在开关案例的默认声明中，我无法理解为什么
和什么可能是共振
private void PlaceRandom()
{
int r, c;
r = 10; c = 10;
int i = 0;
ar = 0;
ac = 0;
Random rnd = new Random();
int val;
while (i < 8)
{
val = rnd.Next(9);
if (numNotExists(val) == true && val > 0)
{
pos[ar, ac] = val;
switch (val)
{
case 1:
lbl1.Location = new Point(c, r);
break;
case 2:
lbl2.Location = new Point(c, r);
break;
case 3:
lbl3.Location = new Point(c, r);
break;
case 4:
lbl4.Location = new Point(c, r);
break;
case 5:
lbl5.Location = new Point(c, r);
break;
case 6:
lbl6.Location = new Point(c, r);
break;
case 7:
lbl7.Location = new Point(c, r);
break;
case 8:
lbl8.Location = new Point(c, r);
break;
default:
}
c += 100;
ac++;
if (ac > 2)
{
ac = 0;
ar++;
}
if (c > 300)
{
c = 10;
r += 100;
}
i++;
}
else
continue;
}
lblBlank.Location = new Point(c, r);
pos[2, 2] = 9;
}
it showing an error "control cannot fall through from one case label ('default:') to another" at the default statement of the switch case i cant understand why
and what could be the reson
推荐答案
添加中断;在默认情况下，C＃中不允许直通：
Add break; in default case as fall through is not allowed in C#
default:
break;
}
请通过此链接了解开关声明的详细信息
< a href =http://www.dotnetperls.com/case> http://www.dotnetperls.com/case
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