从For循环中删除一条记录。 [英] delete one record from For loop.

问题描述

你好团队，



我有一个for循环

Hi team,

I have a for loop

for (int numberOfCount = 0; numberOfCount < singleCellRecords.Count; numberOfCount--)
                        {}

我在singleCellRecords.Count中获取值。现在我想从singleCellRecords.Count中删除一条记录。



怎么可能在for循环中。

我错了。请给我建议。



谢谢

Harshal

I am getting the value in singleCellRecords.Count.Now i want to delete one record from singleCellRecords.Count .

how could it possible in for loop.
I am getting somewhere wrong.please Advice.

Thanks
Harshal

推荐答案

尝试如下

try like below

for (int i = singleCellRecords.Count - 1; i >= 0; i--)
{
    if(put your condtion to find the record you need)
    {
        singleCellRecords.RemoveAt(i);
        break; // call the break method 
    }
}

从List<>等内容中删除时你不能使用 foreach 循环或者你会得到一个异常

When deleting from things like a List<> you cannot use the foreach loop or you will get an exception

Quote：

集合被修改;枚举操作可能无法执行。

Collection was modified; enumeration operation may not execute.

但是你可以使用普通的来获取 -loop

例如，如果我设置了一个字符串列表，用于测试

You can however use an ordinary for-loop
For example if I set up a list of string for testing

List<string> SL = new List<string>();
for (int i = 0; i < 10; i++)

    SL.Add(i.ToString());

我可以这样做

I can do this

for(int j = SL.Count - 1; j >=0; j--)
{
    if (j == 5)
        SL.Remove(SL[j]);
}

请注意，我已经从列表的结尾开始并向后移动到开头 - 这样你总能知道它的位置你尚未查看的项目 - 列表后面的项目会在项目被删除时移动索引

Note that I've started at the "end" of the list and moved backwards to the beginning - that way you always know the position of the items you haven't looked at yet - it's the one's later in the list that will "move" index when an item is deleted

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