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  • 几种文件的读写方式

    1.文件写入

    string fileName = Path.Combine(LogPath, "log.txt");
    Directory.CreateDirectory(LogPath);//创建了文件夹之后,才能创建里面的文件
    using (FileStream fileStream = File.Create(fileName))//打开文件流 (创建文件并写入)
    {
        string name = "12345567778890";
        byte[] bytes = Encoding.Default.GetBytes(name);
        fileStream.Write(bytes, 0, bytes.Length);
        fileStream.Flush();
    }
    using (FileStream fileStream = File.Create(fileName))//打开文件流 (创建文件并写入)
    {
        StreamWriter sw = new StreamWriter(fileStream);
        sw.WriteLine("1234567890");
        sw.Flush();
    }
    
    using (StreamWriter sw = File.AppendText(fileName))//流写入器(创建/打开文件并写入)
    {
        string msg = "15663353135";
        sw.WriteLine(msg);
        sw.Flush();
    }
    using (StreamWriter sw = File.AppendText(fileName))//流写入器(创建/打开文件并写入)
    {
        string name = "0987654321";
        byte[] bytes = Encoding.Default.GetBytes(name);
        sw.BaseStream.Write(bytes, 0, bytes.Length);
        sw.Flush();
    }

    2.文件读取

    foreach (string result in File.ReadAllLines(fileName))//逐行读取
    {
        Console.WriteLine(result);
    }

    string sResult = File.ReadAllText(fileName);//一次性读取所有内容,返回字符串

    Byte[] byteContent
    = File.ReadAllBytes(fileName);//一次性读取所有内容,返回字节数组 string sResultByte = System.Text.Encoding.UTF8.GetString(byteContent);//将字节数组转为字符串


    //如果一个文本文件太大,可以选择分批读取
    using (FileStream stream = File.OpenRead(fileName))//分批读取 { int length = 5; int result = 0; do { byte[] bytes = new byte[length]; result = stream.Read(bytes, 0, length); for (int i = 0; i < result; i++) { Console.WriteLine(bytes[i].ToString()); } } while (length == result); }
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  • 原文地址:https://www.cnblogs.com/LJP-JumpAndFly/p/12017747.html
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