C # traverse all files in a folder, including subfolders

Using System; using System. IO; class ListAllFilesDemo {public static void Main () {Console. write ("Enter the directory to be queried:"); string dir = Console. readLine (); try {ListFiles (new DirectoryInfo (dir);} catch (IOException e) {Console. writeLine (e. message) ;}} public static void ListFiles (FileSystemInfo info) {if (! Info. exists) return; DirectoryInfo dir = info as DirectoryInfo; // if (dir = null) return; FileSystemInfo [] files = dir. getFileSystemInfos (); for (int I = 0; I <files. length; I ++) {FileInfo file = files [I] as FileInfo; // if (file! = Null) Console. writeLine (file. fullName + "\ t" + file. length); // For subdirectories, recursively call else ListFiles (files [I]) ;}} C # to traverse the files in the directory (2) 1. to traverse all directories under a directory, use System. IO. the GetDirectories method of the DirectoryInfo class: DirectoryInfo dir = new DirectoryInfo (@ "c: \"); foreach (DirectoryInfo dChild in dir. getDirectories ("*") {// If GetDirectories ("AB *") is used, all directories starting with AB will be displayed as Response. write (dChild. name + "<BR>"); // print the directory Name Response. write (d Child. fullName + "<BR>"); // print the path and directory name} 2. traverse all files in a directory and use System. IO. the GetFiles method of the DirectoryInfo class: DirectoryInfo dir = new DirectoryInfo (@ "c: \"); foreach (DirectoryInfo dChild in dir. getFiles ("*") {// If GetFiles ("*. txt "), then all txt files will be displayed Response. write (dChild. name + "<BR>"); // print the file Name Response. write (dChild. fullName + "<BR>"); // print the path and file name} How to obtain the files and subdirectories contained in the specified directory 1. directoryInfo. getFiles (): Get the files in the directory (excluding subdirectories). The return type is Fil. EInfo [], supports wildcard search; 2. directoryInfo. getDirectories (): Obtain the subdirectory of the directory (excluding the subdirectory). The return type is DirectoryInfo []. wildcard search is supported. 3. directoryInfo. getFileSystemInfos (): Get the files and subdirectories under the specified directory (excluding subdirectories). The return type is FileSystemInfo []. wildcard search is supported. How to obtain the basic information of the specified file? FileInfo. exists: Get whether the specified file Exists; FileInfo. name, FileInfo. extensioin: get the file name and extension; FileInfo. fullName: Get the fully qualified name of the file (full path); FileInfo. directory: Directory where the file is located. The returned type is DirectoryInfo and FileInfo. directoryName: Get the path of the directory where the file is located (after Full path); FileInfo. length: get the file size (number of bytes); FileInfo. isReadOnly: Get whether the file is read-only; www.2cto.com FileInfo. attributes: gets or sets the Attributes of a specified file. The returned type is FileAttributes enumeration. It can be a combination of multiple values, FileInfo. creationTime, FileInfo. lastAccessTime, FileInfo. lastWriteTime: used to obtain the file creation time, access time, and modification time. It uses recursive traversal to traverse all files in folders and subfiles. Public void FindFile (string dirPath) // The dirPath parameter is the specified directory {// search for files under the specified directory and subdirectory, list subdirectories and file DirectoryInfo Dir = new DirectoryInfo (dirPath) in listBox1; try {foreach (DirectoryInfo d in Dir. getDirectories () // find the subdirectory {FindFile (Dir + d. toString () + "\"); listBox1.Items. add (Dir + d. toString () + "\"); // Add the directory name in listBox1} foreach (FileInfo f in Dir. getFiles ("*. --- ") // find the file {listBox1.Items. add (Dir + f. toString (); // Add the file name in listBox1} catch (Exception e) {MessageBox. show (e. message) ;}} use the following code to limit the file type: foreach (FileInfo f in Dir. getFiles ("*. --- ") // find the file" *. --- "indicates the extension of the file type to be accessed.