如何用条件替换特定行中的特定单词 [英] How to replace specific word in specific line with condition

问题描述

我有这样的文本文件：

I have a text file like this :

CHECK_CONFIG = 0$
LANGUAGE = en$
SERVER = localhost$
SERVERM = localhost$

我需要更换任何值的 SERVER = localhost $ 中的localhost...



我尝试了什么：



我试着写这个代码

I need to replace "localhost" in SERVER = localhost$ with any value...

What I have tried:

I tried to write this code

public static string readConfTextStartWith(string path, string startsWith)
        {
            string Value = "";
            foreach (var line in File.ReadLines(path))
            {
                if (line.StartsWith(startsWith))
                {
                    string str = line.Split('=')[1].Trim();
                    Value = Convert.ToString(str.Substring(0, str.Length - (str.Length - str.LastIndexOf('$'))));
                }
            }
            return Value;
        }
        public static void replaceText(string path, string startsWith, string replacement)
        {
            string word =  readConfTextStartWith(path, startsWith);
            using (StreamReader reader = new StreamReader(path))
            {
                string line;
                while ((line = reader.ReadLine()) != null)
                {
                    if (line.StartsWith(startsWith))
                    {
                        line = line.Replace(word, replacement);
                        // here what i can't to do 
                        // i went to write one line but this code clear all text and add this line only 
                        File.WriteAllText(path, line);

                    }
                }
                reader.Close();
            }
        }

Functions.replaceText("configA.txt", "SERVER","localhost");

推荐答案

LANGUAGE = zh

LANGUAGE = en

SERVER = localhost

SERVER = localhost

SERVERM = localhost

SERVERM = localhost

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