如何在文本文件中找到一个单词，然后将前一个单词添加到该单词中？ [英] How do I find a word in a text file and then get the previous word to that one?

问题描述

我有一个文本文件，我正在寻找一个单词，但我需要在我正在搜索的单词之前的单词。例如Patrick Called。我要搜索的常用词是Called，但我想要回归Patrick。我目前正在使用Streamreader，但卡住

I have a text file where I am looking for a word however I need the word prior to one I am searching for. For example "Patrick Called". The common word that I would search for is Called, but I want to return Patrick. I am currently using Streamreader but am stuck

推荐答案

试试这个：

Try this:

string fileText = File.ReadAllText("yourFile.txt");
string[] words = fileText.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries); // this splits the string and makes sure that there are no empty strings in the array
int wordIndex = Array.IndexOf(words, "Called");
if (wordIndex > 0)
{
    string str = words[wordIndex - 1];
    Console.WriteLine(str); // this will print 'Patrick' if the file contains 'Patrick Called'
}
else
{
    // the searched word is the first word; you can't get the word before it
    // OR: the searched word doesn't exist
}

希望这会有所帮助。

Hope this helps.

HI
在< i style =color：red> ProgramFox 解决方案。

使用 StreamReader 试试这个，这将读取与定义的单词匹配的所有名称 ..

HI On top of ProgramFox solution.
try this using StreamReader , this will read all the names matching the defined word..

class Program
   {
       static void Main(string[] args)
       { //ƒ
           string file = @"D:\Projects\console_poc\console_poc\text.txt";
           // input as below
           //Patrik Called something.. john Called
           //some test test test karthik Called .....

           using (StreamReader sr = new StreamReader(file))
           {
               String line = sr.ReadToEnd();
               string[] array = line.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
               string key = "Called";
               for (int i = 1; i < array.Length; i++)
               {
                   if (array[i] == key)
                       Console.WriteLine(array[i - 1]);
                   // output as below:
                   // Patrik
                   // john
                   // karthik
               }
           }

           Console.ReadLine();


       }
   }

这是解决方案之一。



fileText.Split（new char [] {''，'\ n'，'。'}



这个词在行的末尾，用空格分割不行。所以也加上'\ n'。

This is an add on for solution one.

fileText.Split(new char[] { ' ', '\n', '.' }

When the word is on the end of the line the split with a space wont work. So also add '\n'.

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