Question

我的文字文件中有雇员电子邮件，如下所示

abc@ewr.com
xyc@df.co.nz
rte@pope.com
ssddsf@fdf.com

我想要改变这样

abc@ewr.com,xyc,df.co.nz,rte@pope.com,ssddsf@fdf.com

如何使用C＃代码？

Answer 1

string yourString = oldString.Replace(' ', ',');

很可能它不是空格而是新线，所以它将是

string yourString = oldString.Replace(Environment.NewLine, ",");

Answer 2

可以做到这一点;

    string linesFromFile = string.Empty;

    // Read into string from file
    using (StreamReader sr = new StreamReader("filename.txt"))
    {
        linesFromFile = sr.ReadToEnd();
        linesFromFile = linesFromFile.Replace(Environment.NewLine, ",");
        Console.WriteLine(linesFromFile);
    }

    // Write back from string to file
    using (StreamWriter sw = new StreamWriter("newFilename.txt"))
    {
        foreach(string s in linesFromFile.Split(','))
        {
            sw.WriteLine(s);
        }
    }

Answer 3

我会直接对文件进行操作，以避免将潜在巨大的员工数据库读入字符串的开销：

private static void MungeFile(string filename)
{
    FileStream fsOut = File.Create(filename+"_out");
    FileStream fsIn = File.OpenRead(filename);
    StreamReader sr = new StreamReader(fsIn);
    StreamWriter sw = new StreamWriter(fsOut);
    while (!sr.EndOfStream)
    {
        string inputLine = sr.ReadLine();
        string terminator = (sr.EndOfStream ? "" : ",");
        sw.Write(inputLine + terminator);
    }
    sw.Flush();
    fsOut.Close();
}

Answer 4

Microsoft的文档很好地介绍了这一点： http://msdn.microsoft.com/en-us/library/ms228599.aspx

Answer 5

将文本文件作为字符串读入，然后执行以下操作以使用逗号替换换行符（如果要替换空格，请将Environment.NewLine替换为''）：

String newFile = oldFile.Replace(Environment.NewLine,',');

Answer 6

这将用'，'

替换CR \ LF和空格

string newContent = string.Join(",", 
                                File.ReadAllLines("sourceFile.txt")
                                ).Replace(' ', ',')

File.WriteAllText("newFile.txt", newContent);

检测空间并添加逗号

6 个答案: