有关判断的问题

[lxfei73]

if (direc.Equals(input1))
{
s = direc.Substring(1, 2); q = direc.Substring(0, 1); m = direc.Substring(0, 2);
if ((judge(q,1) == "1") || (judge(q,1) == "2") || (judge(q,1) == "3") || (judge(q,1) == "4"))
{
switch (judge(s, 2))
{
case "BK":
database1(directoryName, dt);
break;
case "JL":
database1(directoryName, dt);
break;
case "KF":
database1(directoryName, dt);
break;
case "YB":
database1(directoryName, dt);
break;
}
switch (judge(s, 1))
{
case "S":
database1(directoryName, dt);
break;
case "T":
database1(directoryName, dt);
break;
case "F":
database1(directoryName, dt);
break;
case "J":
database1(directoryName, dt);
break;
case "L":
database1(directoryName, dt);
break;
case "B":
database1(directoryName, dt);
break;
case "Y":
database1(directoryName, dt);
break;
case "P":
database1(directoryName, dt);
break;
case "U":
database1(directoryName, dt);
break;
case "H":
database1(directoryName, dt);
break;
case "Q":
database1(directoryName, dt);
break;
case "C":
database1(directoryName, dt);
break;

}
}
这里direc=1JL-cfs-231-hgf,input1=1JL-cfs-231-hgf,为什么s,m,q为空值阿

[宝_爸]

s = direc.Substring(1, 2); q = direc.Substring(0, 1); m = direc.Substring(0, 2);
你确信在这行后，s,q,m都是空，应该不会吧。

[宝_爸]

设置个断点跟踪一下。

[benjaminwu198818]

怎么可能为空？ s为JL ; q为1 ; m为1J ;

[moonshineidolon]

断点调试吧，这种问题，不调试，谁也不知道。

[benjaminwu198818]

judge 是什么呀？

[youyouke]

你的s,m,q为空值应该不是出现在第三行，你可能指的是judge(),你看看这个函数吧，它具体是什么我不知道。

[liu4545533]

应当不能为空值的VS功能超级强大 建议您在截取字符的那里设一个断点 这样就ok啦