C#中,将字符串一行行写入文本文件中

最新推荐文章于 2025-06-19 14:58:12 发布

转载最新推荐文章于 2025-06-19 14:58:12 发布 · 1.7w 阅读

文章标签：

#c# #string #file #header #date #class

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本文介绍使用C#进行文本文件写入的基本方法，包括创建文件、向文件中写入文本及日期时间等信息。

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下面的代码示例显示向文本文件写入文本的简单方法。
using System;
using System.IO;

class Test
{
    public static void Main()
    {
        // Create an instance of StreamWriter to write text to a file.
        // The using statement also closes the StreamWriter.
        using (StreamWriter sw = new StreamWriter("TestFile.txt"))
        {
            // Add some text to the file.
            sw.Write("This is the ");
            sw.WriteLine("header for the file.");
            sw.WriteLine("-------------------");
            // Arbitrary objects can also be written to the file.
            sw.Write("The date is: ");
            sw.WriteLine(DateTime.Now);
        }
    }
}

下面的代码示例创建一个新文本文件并向其写入一个字符串。
using System;
using System.IO;
public class TextToFile
{
    private const string FILE_NAME = "MyFile.txt";
    public static void Main(String[] args)
    {
        if (File.Exists(FILE_NAME))
        {
            Console.WriteLine("{0} already exists.", FILE_NAME);
            return;
        }
        StreamWriter sr = File.CreateText(FILE_NAME);
        sr.WriteLine ("This is my file.");
        sr.WriteLine ("I can write ints {0} or floats {1}, and so on.",
            1, 4.2);
        sr.Close();
    }
}

public static WriteTextFile(string logMessage)
{
if (logMessage!=null && logMessage.Length>0)
{
  System.IO.StreamWriter w = System.IO.File.AppendText("logServer.txt");

  w.WriteLine("记录时间:{0}", DateTime.Now.ToString());
  w.WriteLine("信息文本:{0}", logMessage);
  w.WriteLine("---------------------------------------------------------------------------------------------");
  w.Flush();
  w.Close();
}
}