1. 文件夹、文件的相关操作方法
/// <summary> /// 文件夹 文件管理 /// /// 会有一些在开发环境/测试环境/生产环境 不同， /// 数据库连接--路径--开关 /// 配置文件：不用改代码编译 /// /// 配置路径：绝对路径 /// 相对路径 / 然后拼装 /// 相当于应用程序所在路径 /// /// 配置文件最好有个集中管理的类 /// /// /// </summary> public class MyIO { /// <summary> /// 配置绝对路径 /// </summary> private static string LogPath = ConfigurationManager.AppSettings["LogPath"]; private static string LogMovePath = ConfigurationManager.AppSettings["LogMovePath"]; /// <summary> /// 获取当前程序路径 /// </summary> private static string LogPath2 = AppDomain.CurrentDomain.BaseDirectory; /// <summary> /// 读取文件夹 文件信息 /// </summary> public static void Show() { {//check if (!Directory.Exists(LogPath))//检测文件夹是否存在 { } DirectoryInfo directory = new DirectoryInfo(LogPath);//不存在不报错 注意exists属性 Console.WriteLine(string.Format("{0} {1} {2}", directory.FullName, directory.CreationTime, directory.LastWriteTime)); if (!File.Exists(Path.Combine(LogPath, "info.txt"))) { } FileInfo fileInfo = new FileInfo(Path.Combine(LogPath, "info.txt")); Console.WriteLine(string.Format("{0} {1} {2}", fileInfo.FullName, fileInfo.CreationTime, fileInfo.LastWriteTime)); } {//Directory if (!Directory.Exists(LogPath)) { DirectoryInfo directoryInfo = Directory.CreateDirectory(LogPath);//一次性创建全部的子路径 Directory.Move(LogPath, LogMovePath);//移动 原文件夹就不在了 Directory.Delete(LogMovePath);//删除 } } {//File string fileName = Path.Combine(LogPath, "log.txt"); string fileNameCopy = Path.Combine(LogPath, "logCopy.txt"); string fileNameMove = Path.Combine(LogPath, "logMove.txt"); bool isExists = File.Exists(fileName); if (!isExists) { 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 = "今天是Course6IOSerialize，今天上课的人有55个人"; 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(); } foreach (string result in File.ReadAllLines(fileName)) { Console.WriteLine(result); } string sResult = File.ReadAllText(fileName); Byte[] byteContent = File.ReadAllBytes(fileName); string sResultByte = System.Text.Encoding.UTF8.GetString(byteContent); 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, 5); for (int i = 0; i < result; i++) { Console.WriteLine(bytes[i].ToString()); } } while (length == result); } File.Copy(fileName, fileNameCopy); File.Move(fileName, fileNameMove); File.Delete(fileNameCopy); File.Delete(fileNameMove);//尽量不要delete } } {//DriveInfo DriveInfo[] drives = DriveInfo.GetDrives(); foreach (DriveInfo drive in drives) { if (drive.IsReady) Console.WriteLine("类型：{0} 卷标：{1} 名称：{2} 总空间：{3} 剩余空间：{4}", drive.DriveType, drive.VolumeLabel, drive.Name, drive.TotalSize, drive.TotalFreeSpace); else Console.WriteLine("类型：{0} is not ready", drive.DriveType); } } { Console.WriteLine(Path.GetDirectoryName(LogPath)); //返回目录名，需要注意路径末尾是否有反斜杠对结果是有影响的 Console.WriteLine(Path.GetDirectoryName(@"d:\abc")); //将返回 d: Console.WriteLine(Path.GetDirectoryName(@"d:\abc"));// 将返回 d:abc Console.WriteLine(Path.GetRandomFileName());//将返回随机的文件名 Console.WriteLine(Path.GetFileNameWithoutExtension("d:\abc.txt"));// 将返回abc Console.WriteLine(Path.GetInvalidPathChars());// 将返回禁止在路径中使用的字符 Console.WriteLine(Path.GetInvalidFileNameChars());//将返回禁止在文件名中使用的字符 Console.WriteLine(Path.Combine(LogPath, "log.txt"));//合并两个路径 } }
2. 常见应用：找出一个文件夹中的所有子文件夹（找出所有文件方法与此类似）
/// <summary> /// 找出全部的子文件夹 /// </summary> /// <param name="rootPath">根目录</param> /// <returns></returns> public static List<DirectoryInfo> GetAllDirectory(string rootPath) { if (!Directory.Exists(rootPath)) return new List<DirectoryInfo>(); List<DirectoryInfo> directoryList = new List<DirectoryInfo>();//容器 DirectoryInfo directory = new DirectoryInfo(rootPath);//root文件夹 directoryList.Add(directory); return GetChild(directoryList, directory); } /// <summary> /// 完成 文件夹--子目录--放入集合 /// </summary> /// <param name="directoryList"></param> /// <param name="directoryCurrent"></param> /// <returns></returns> private static List<DirectoryInfo> GetChild(List<DirectoryInfo> directoryList, DirectoryInfo directoryCurrent) { var childArray = directoryCurrent.GetDirectories(); if (childArray != null && childArray.Length > 0) { directoryList.AddRange(childArray); foreach (var child in childArray) { GetChild(directoryList, child); } } return directoryList; }