C# 文件操作,遍历文件夹、读文件、写入、修改、复制

待我称王封你为后i 2022-08-13 16:00 253阅读 0赞

1.遍历文件夹下的所有文件

/// <summary>
    /// 获得文件夹下的所有文件名
    /// </summary>
    /// <param name="StuListPath">文件夹路径</param>
    public static List<string> GetAllFileName(string StuListPath)
    {
    	List<string> ListFileName = new List<string> { };
    	DirectoryInfo dir = new DirectoryInfo(StuListPath);
    
    	 获得所有文件
    	FileInfo[] files = dir.GetFiles();
    
    	foreach(FileInfo file in files)
    	{
    		 ListFileName.Add(file.Name);
    	}
    	return ListFileName;
    }

2.创建文件夹

sPath="E:\\StudentMIS\\list";
    Directory.CreateDirectory(sPath);

3.创建一个文本文档（txt）,并写入内容

sPath="E:\\StudentMIS\\list\\1班学生名单.log";
    StreamWriter streamWrite = null;
    streamWrite = new StreamWriter(sPath, true);
    
    streamWrite.WriteLine(“我就就是城环第一帅怎么了？”);
    
    streamWrite.Close();

4.读取文本文档（txt）的所有行，并进行修改后保存

sFilePath="E:\\StudentMIS\\list\\1班学生名单.log";
    string[] sAllLines = File.ReadAllLines(sFilePath);
    
    int i = 0;
    while (sAllLines[i] != null)
    {
    	sStuName = sAllLines[i].Substring(0, sAllLines[i].LastIndexOf(","));
    	sStuCounts = sAllLines[i].Substring(sAllLines[i].LastIndexOf(",") + 1);
    	
    	 点名名单存在时，点到某个学生时，其点名次数+1
    	if (sStuName.Trim().Equals(“奚学长”))
    	{
    		iStuCounts = Convert.ToInt32(sStuCounts) + 1;
    		sAllLines[i] = sAllLines[i].Replace(sStuCounts, iStuCounts.ToString());
    		 保存
    		System.IO.File.WriteAllLines(sFilePath, sAllLines);
    		break;
    	}
    	i++;
    }

5.复制文件

sFilePath="E:\\StudentMIS\\list\\1班学生名单.log";
    sNewFilePath="D:\\1班学生名单.log";
    FileInfo file = new FileInfo(sFilePath);
    file.CopyTo(sNewFilePath, true);