Книга: C# 2008 Programmer

Creating a FileExplorer

Creating a FileExplorer

Now that you have seen how to use the various classes to manipulate files and directories, let's put them to good use by building a simple file explorer that displays all the subdirectories and files within a specified directory.

The following program contains the PrintFoldersinCurrentDirectory() function, which recursively traverses a directory's subdirectories and prints out its contents:

class Program {
 static string path = @"C:Program FilesMicrosoft Visual Studio 9.0VC#";
 static void Main(string[] args) {
  DirectoryInfo di = new DirectoryInfo(path);
  Console.WriteLine(di.FullName);
  PrintFoldersinCurrentDirectory(di, -1);
  Console.ReadLine();
 }
 private static void PrintFoldersinCurrentDirectory(
  DirectoryInfo directory, int level) {
  level++;
  //---print all the subdirectories in the current directory---
  foreach (DirectoryInfo subDir in directory.GetDirectories()) {
   for (int i = 0; i <= level * 3; i++)
   Console.Write(" ");
   Console.Write("| ");
   //---display subdirectory name---
   Console.WriteLine(subDir.Name);
   //---display all the files in the subdirectory---
   FileInfo[] files = subDir.GetFiles();
   foreach (FileInfo file in files) {
    //---display the spaces---
    for (int i = 0; i <= (level+1) * 3; i++) Console.Write(" ");
    //---display filename---
    Console.WriteLine("* " + file.Name);
   }
   //---explore its subdirectories recursively---
   PrintFoldersinCurrentDirectory(subDir, level);
  }
 }
}

Figure 11-2 shows the output of the program.

Figure 11-2

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