C#读写文本

最新推荐文章于 2025-08-18 17:23:14 发布

dollybol

最新推荐文章于 2025-08-18 17:23:14 发布

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CC 4.0 BY-SA版权

文章标签： c# exception file system string class

本文链接：https://blog.youkuaiyun.com/dollybol/article/details/1764313

本文介绍了一个使用C#进行文件读写的简单示例，包括如何读取文本文件的内容并将其显示在控制台，以及如何向现有文本文件追加内容。

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using System;
using System.IO;

//读文件
class Test
{
    public static void Main()
    {
        try
        {
            // Create an instance of StreamReader to read from a file.
            // The using statement also closes the StreamReader.
            using (StreamReader sr = new StreamReader("TestFile.txt"))
            {
                String line;
                // Read and display lines from the file until the end of
                // the file is reached.
                while ((line = sr.ReadLine()) != null)
                {
                    Console.WriteLine(line);
                }
            }
        }
        catch (Exception e)
        {
            // Let the user know what went wrong.
            Console.WriteLine("The file could not be read:");
            Console.WriteLine(e.Message);
        }
    }
}

//写文件
System.IO.FileStream   fs   =   new   System.IO.FileStream(@"D:/a.txt",   System.IO.FileMode.Append);
System.IO.StreamWriter   sw   =   new   System.IO.StreamWriter(fs);
sw.WriteLine("Hello");
sw.Close();
fs.Close();