警告CS0168：声明变量'el'但从未使用过？ [英] warning CS0168: The variable 'el' is declared but never used?

问题描述

假设我只想计算一个集合中的元素，所以我这样做

这个：


int i = 0;

foreach（MyClement el in MyCollection）

{

i ++;

}

返回i;


在2003编译器中是否有任何方法可以避免警告：

警告CS0168：变量''el''已声明但从未使用过？


我不想关闭警告（不能在VS 2003中）我想要

修复代码而不做任何浪费...


谢谢！


是的，我知道你可以得到
$ b的长度$ b collection ...我的真实例子比这里提供的要复杂得多

这里。


-Kelly


--------------------------------

来自：Kelly Anderson

Suppose that I just want to count the elements in a collection, so I do
this:

int i = 0;
foreach (MyElement el in MyCollection)
{
i++;
}
return i;

Is there any way in the 2003 compiler to avoid the warning:
warning CS0168: The variable ''el'' is declared but never used?

I don''t want to turn off the warning (can''t anyway in VS 2003) I want
to fix the code without doing something wasteful...

Thanks!

And yes, I do know that you could just get the length of the
collection... my real example is a bit more complex than that presented
here.

-Kelly

--------------------------------
From: Kelly Anderson

推荐答案

使用for循环而不是foreach循环：


int co非= 0;

int i;

for（i = 0; I< MyCollection.Count; i ++）{

count ++;

}


返回计数;


那个应该工作

use a for loop instead of a foreach loop:

int count = 0;
int i;
for (i = 0; i<MyCollection.Count; i++) {
count++;
}

return count;

that should work

你能提供一些关于真实例子的更多细节吗？


试着想一想在这种情况下，你想要迭代一个集合的成员，但实际上并没有对

个别成员做任何事情让我很头疼。如果你能给出更多的b $ b b细节，也许这会让我缺乏想象力。 :)

Could you give more details about the "real example"?

Trying to think of a situation in which you would want to iterate over
the members of a collection but not actually do anything with the
individual members is giving me a headache. If you could give more
details, perhaps it would help my dearth of imagination. :)

大声笑，多数民众赞成有趣。它开始让我头疼:)

lol, thats funny. it was starting to give me a headache as well :)

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