如何从List中选择记录并根据条件移动到其他列表，并将记录逐个复制到其他列表中。 [英] How to select records from List and move to other list on basis of condition and copy the record into other List one by one.

问题描述

HI，

我有这个记录的第一个名单：

I ahve Firstlist with this record :

NAWA01|N0475|57|20100401|20151231
NAWA01|N7511|154|20120801|20151231
NAWA03|N7780||19980101|20151231
NAWA03|N9120||20070101|20151231

和其他第二个清单：

And other secondlist with:

NAWA01
NAWA03

这不过是第一个列表的第一个记录。



我想要运行一个foreach循环，其中我必须逐个选择第二个列表中存在ID的所有记录并将其保存到其他新列表。

That is nothing but the first record of the first list.

NOw i want to run a foreach loop, in which i have to selct all the record with ID present in the secondList one by one and save it to other New list.

推荐答案

我想你想做什么是：

I think what you want to do is:

List<string> FirstList = new List<string>();  // contains the 4 records
List<string> Ids = new List<string>();        // contains IDs of interest
List<string> ThirdList = new List<string>();  // list to receive the records of interest

foreach (string id in Ids) {
    foreach (string rec in FirstList) {
        if (rec.StartsWith (id)) {
            ThirdList.Add (rec);
        }
    }
}

/ ravi

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