替换文本文件中的某个单词 [英] Replacing a certain word in a text file

问题描述

我知道这已经被问了几次了，但是我看到了很多正则表达式等等，而且我确信还有另外一种方法可以用流读/写器来做到这一点。以下是我的代码。我试图用白菜来代替茶。有人可以帮忙吗？

  namespace Week_9_Exer_4 
 {
 class TextImportEdit 
 { 
 public void EditorialControl（）
 {
 string fileName; 
 string lineReadFromFile; 
 
 
 Console.WriteLine（）; 
 //询问要读取的文件的名称
 Console.Write（你想读哪个文件？）; 
 fileName = Console.ReadLine（）; 
 Console.WriteLine（）; 
 
 //打开文件以读取
 StreamReader fileReader = new StreamReader（C：\\ Users \\Greg\\Desktop\\Programming Files\\ \\\story.txt）; 
 
 //读取文件中的行并显示它们
 //直到返回null（表示文件的结尾）
 lineReadFromFile = fileReader.ReadLine（）; 
 
 Console.WriteLine（请输入您要编辑的字词：）; 
 string editWord = Console.ReadLine（）; 
 
 while（lineReadFromFile！= null）
 {
 Console.WriteLine（lineReadFromFile）; 
 lineReadFromFile = fileReader.ReadLine（）; 
} 
 
 String text = File.ReadAllText（C：\\ Users \\Greg\\Desktop\\Programming Files\\\\\\\\\文本）; 
 fileReader.Close（）; 
 
 StreamWriter fileWriter = new StreamWriter（C：\\ Users \\Greg\\\\Desktop\\ Program Files \\\\\\\\\\\\\\\\' 
 string newText = text.Replace（tea，cabbage）; 
 fileWriter.WriteLine（newText）; 
 fileWriter.Close（）; 
 
 
 
 
 $ b 
解决方案
 
如果你不关心内存使用情况：
 
 
  string fileName = @C：\\ \\用户\ Greg \Desktop\Programming Files\story.txt; 
 File.WriteAllText（fileName，File.ReadAllText（fileName）.Replace（tea，cabbage））; 
  
如果您有一个多行文件，它不会在行尾随机地分割单词，你可以用更友好的方式一次修改一行： 
 
 
  //为源文件打开一个流
 using（var sourceFile = File.OpenText（fileName））
 {
 //创建一个临时文件路径，我们可以在这里写修改行
 string tempFile = Path.Combine（Path .GetDirectoryName（fileName），story-temp.txt）; 
 //使用（var tempFileStream = new StreamWriter（tempFile））为临时文件
打开一个流
 {
 string line; 
 //读取文件中的行
 while（（line = sourceFile.ReadLine（））！= null）
 {
 //替换单词
线= line.Replace（茶，cabbage）; 
 //将修改过的行写入新文件
 tempFileStream.WriteLine（line）; 
 
 
 $ b //将原始文件替换为临时文件
 File.Replace（story-temp.txt，story.txt ， 空值）; 
  
 
I know this has been asked a few times, but I have seen a lot of regex etc., and I'm sure there is another way to do this with just a stream reader/writer. Below is my code. I'm trying to replace "tea" with the word "cabbage". Can somebody help? I believe I have the wrong syntax.
namespace Week_9_Exer_4
{
    class TextImportEdit
    {
        public void EditorialControl()
        {
            string fileName;
            string lineReadFromFile;


            Console.WriteLine("");
            // Ask for the name of the file to be read
            Console.Write("Which file do you wish to read? ");
            fileName = Console.ReadLine();
            Console.WriteLine("");

            // Open the file for reading
            StreamReader fileReader = new StreamReader("C:\\Users\\Greg\\Desktop\\Programming Files\\story.txt");

            // Read the lines from the file and display them
            // until a null is returned (indicating end of file)
            lineReadFromFile = fileReader.ReadLine();

            Console.WriteLine("Please enter the word you wish to edit out: ");
            string editWord = Console.ReadLine();            

            while (lineReadFromFile != null)
            {
                Console.WriteLine(lineReadFromFile);
                lineReadFromFile = fileReader.ReadLine();
            }

            String text = File.ReadAllText("C:\\Users\\Greg\\Desktop\\Programming Files\\story.txt");
            fileReader.Close();

            StreamWriter fileWriter = new StreamWriter("C:\\Users\\Greg\\Desktop\\Programming Files\\story.txt", false);
            string newText = text.Replace("tea", "cabbage");
            fileWriter.WriteLine(newText);
            fileWriter.Close();

        }
    }
}

解决方案
If you don't care about memory usage:
string fileName = @"C:\Users\Greg\Desktop\Programming Files\story.txt";
File.WriteAllText(fileName, File.ReadAllText(fileName).Replace("tea", "cabbage"));
If you have a multi-line file that doesn't randomly split words at the end of the line, you could modify one line at a time in a more memory-friendly way:
// Open a stream for the source file
using (var sourceFile = File.OpenText(fileName))
{
    // Create a temporary file path where we can write modify lines
    string tempFile = Path.Combine(Path.GetDirectoryName(fileName), "story-temp.txt");
    // Open a stream for the temporary file
    using (var tempFileStream = new StreamWriter(tempFile)) 
    {
        string line;
        // read lines while the file has them
        while ((line = sourceFile.ReadLine()) != null) 
        {
            // Do the word replacement
            line = line.Replace("tea", "cabbage");
            // Write the modified line to the new file
            tempFileStream.WriteLine(line);
        }
    }
}
// Replace the original file with the temporary one
File.Replace("story-temp.txt", "story.txt", null);


                        
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