取前3位数字并将其保存到另一个文本文件 [英] take the first 3 digits and save it to another text file

问题描述

我想将文本文件的前3位数字转换为另一个文本文件。我的文件是test.txt

I want to take the first 3 digits of the text file into another text file. My file is test.txt

195^20140212^0^H^000000^A
312^20140211^0^H^010000^A
312^20140211^0^H^020000^A

我只需要在另一个文本文件中取195,312,312。怎么可能？我已经尝试了以下但我无法将其保存到另一个文本文件。

Where I only need to take the 195,312,312 in another text file. How can It be possible? I have tried the below but I am not able to save it to another text file.

string test = @"\\Fdrtse\POI\Debopam\test.txt";
var text = File.ReadAllLines(test);

while (text != null) {
    foreach(var line in text) {
        string[] dataArray = line.Split('^');
    }
}

推荐答案

while（text！= null）条件没有意义， File.ReadAllLines（）总是返回一个字符串数组（可能除非它抛出异常。



在你分裂（）之后进入 dataArray ，您应该将 dataArray [0] 值收集到另一个列表< string> 然后在读完所有输入文件后，将该列表的内容写入输出文件，格式化为您的目的。

The while (text != null) condition is pointless, File.ReadAllLines() always returns an array of strings (possibly empty) unless it throws an exception.

After you Split() the line into dataArray, you should collect the dataArray[0] values into another List<string> and then at the completion of reading all of the input file, write the contents of that list to your output file, formatting appropriately for your purpose.

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