1.关于打印目录树
前几天写文档,要解释一个目录里大部分的子目录和文件的用途,于是顺手写了一个打印文件目录树的C#工具类,可以将生成的目录树打印到Console或是文本文件中。
2.工具类源码
打印目录树工具类:DocTreeHelper
需要手动加载命名空间:System.IO
class DocTreeHelper { /// <summary> /// 输出目录结构树 /// </summary> /// <param name="dirpath">被检查目录</param> public static void PrintTree(string dirpath) { if (!Directory.Exists(dirpath)) { throw new Exception("文件夹不存在"); } PrintDirectory(dirpath, 0, ""); } /// <summary> /// 将目录结构树输出到指定文件 /// </summary> /// <param name="dirpath">被检查目录</param> /// <param name="outputpath">输出到的文件</param> public static void PrintTree(string dirpath, string outputpath) { if (!Directory.Exists(dirpath)) { throw new Exception("文件夹不存在"); } //将输出流定向到文件 outputpath StringWriter swOutput = new StringWriter(); Console.SetOut(swOutput); PrintDirectory(dirpath, 0, ""); //将输出流输出到文件 outputpath File.WriteAllText(outputpath, swOutput.ToString()); //将输出流重新定位回文件 outputpath StreamWriter swConsole = new StreamWriter( Console.OpenStandardOutput(), Console.OutputEncoding); swConsole.AutoFlush = true; Console.SetOut(swConsole); } /// <summary> /// 打印目录结构 /// </summary> /// <param name="dirpath">目录</param> /// <param name="depth">深度</param> /// <param name="prefix">前缀</param> private static void PrintDirectory(string dirpath, int depth, string prefix) { DirectoryInfo dif = new DirectoryInfo(dirpath); //打印当前目录 if (depth == 0) { Console.WriteLine(prefix + dif.Name); } else { Console.WriteLine(prefix.Substring(0, prefix.Length - 2) + "| "); Console.WriteLine(prefix.Substring(0, prefix.Length - 2) + "|-" + dif.Name); } //打印目录下的目录信息 for (int counter = 0; counter < dif.GetDirectories().Length; counter++) { DirectoryInfo di = dif.GetDirectories()[counter]; if (counter != dif.GetDirectories().Length - 1 || dif.GetFiles().Length != 0) { PrintDirectory(di.FullName, depth + 1, prefix + "| "); } else { PrintDirectory(di.FullName, depth + 1, prefix + " "); } } //打印目录下的文件信息 for (int counter = 0; counter < dif.GetFiles().Length; counter++) { FileInfo f = dif.GetFiles()[counter]; if (counter == 0) { Console.WriteLine(prefix + "|"); } Console.WriteLine(prefix + "|-" + f.Name); } } }
3.调用实例
在Main函数中输入下面的代码进行调用
class Program { static void Main(string[] args) { string dirpath = @"D:\MyPrograms\Program4Use\DocumentTree"; string outputpath = @"output.txt"; DocTreeHelper.PrintTree(dirpath); DocTreeHelper.PrintTree(dirpath, outputpath); Console.WriteLine("Output Finished"); Console.WriteLine("输出完毕"); Console.ReadLine(); } }
4.运行效果
1)调用DocTreeHelper.PrintTree(dirpath)将目录dirpath的信息输出到控制台
2)调用DocTreeHelper.PrintTree(dirpath, outputpath)将目录dirpath的信息输出到文本文件outputpath
5.其他注意事项
1)在输出到文件的函数中,本文中的代码是先将Console的输出定位到一个流中,再在完成功能后将Console的输出定位回控制台来实现的。输出到控制台的流,编码方式应该采用Console.OutputEncoding,如果使用Encoding.ASCII,可以正确输出英文,但之后输出汉字会出现乱码。
2)不要在输出到文本文件的内容中使用字符‘\b‘,BackSpace在文本文件中也是一个字符,它并不会将光标向前移动。
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