C#程序中创建、复制、移动、删除文件或文件夹的示例

public class CreateFileOrFolder{  static void Main()  {    string folderName = @"c:/Top-Level Folder";    string pathString = System.IO.Path.Combine(folderName, "SubFolder");    string pathString2 = @"c:/Top-Level Folder/SubFolder2";    System.IO.Directory.CreateDirectory(pathString);     string fileName = System.IO.Path.GetRandomFileName();    pathString = System.IO.Path.Combine(pathString, fileName);    Console.WriteLine("Path to my file: {0}/n", pathString);    if (!System.IO.File.Exists(pathString))    {      using (System.IO.FileStream fs = System.IO.File.Create(pathString))      {        for (byte i = 0; i < 100; i++)        {          fs.WriteByte(i);        }      }    }    else    {      Console.WriteLine("File /"{0}/" already exists.", fileName);      return;    }    try    {      byte[] readBuffer = System.IO.File.ReadAllBytes(pathString);      foreach (byte b in readBuffer)      {        Console.Write(b + " ");      }      Console.WriteLine();    }    catch (System.IO.IOException e)    {      Console.WriteLine(e.Message);    }    System.Console.WriteLine("Press any key to exit.");    System.Console.ReadKey();  }}

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// Comment out the following line.//string fileName = System.IO.Path.GetRandomFileName();// Replace that line with the following assignment.string fileName = "MyNewFile.txt";

using (System.IO.FileStream fs = new System.IO.FileStream(pathString, FileMode.Append)) {  for (byte i = 0; i < 100; i++)  {    fs.WriteByte(i);  }}

public class SimpleFileCopy{  static void Main()  {    string fileName = "test.txt";    string sourcePath = @"C:/Users/Public/TestFolder";    string targetPath = @"C:/Users/Public/TestFolder/SubDir";    // Use Path class to manipulate file and directory paths.    string sourceFile = System.IO.Path.Combine(sourcePath, fileName);    string destFile = System.IO.Path.Combine(targetPath, fileName);    // To copy a folder's contents to a new location:    // Create a new target folder, if necessary.    if (!System.IO.Directory.Exists(targetPath))    {      System.IO.Directory.CreateDirectory(targetPath);    }    // To copy a file to another location and     // overwrite the destination file if it already exists.    System.IO.File.Copy(sourceFile, destFile, true);    // To copy all the files in one directory to another directory.    // Get the files in the source folder. (To recursively iterate through    // all subfolders under the current directory, see    // "How to: Iterate Through a Directory Tree.")    // Note: Check for target path was performed previously    //    in this code example.    if (System.IO.Directory.Exists(sourcePath))    {      string[] files = System.IO.Directory.GetFiles(sourcePath);      // Copy the files and overwrite destination files if they already exist.      foreach (string s in files)      {        // Use static Path methods to extract only the file name from the path.        fileName = System.IO.Path.GetFileName(s);        destFile = System.IO.Path.Combine(targetPath, fileName);        System.IO.File.Copy(s, destFile, true);      }    }    else    {      Console.WriteLine("Source path does not exist!");    }    // Keep console window open in debug mode.    Console.WriteLine("Press any key to exit.");    Console.ReadKey();  }}

public class SimpleFileMove{  static void Main()  {    string sourceFile = @"C:/Users/Public/public/test.txt";    string destinationFile = @"C:/Users/Public/private/test.txt";    // To move a file or folder to a new location:    System.IO.File.Move(sourceFile, destinationFile);    // To move an entire directory. To programmatically modify or combine    // path strings, use the System.IO.Path class.    System.IO.Directory.Move(@"C:/Users/Public/public/test/", @"C:/Users/Public/private");  }}

public class SimpleFileDelete{  static void Main()  {    // Delete a file by using File class static method...    if(System.IO.File.Exists(@"C:/Users/Public/DeleteTest/test.txt"))    {      // Use a try block to catch IOExceptions, to      // handle the case of the file already being      // opened by another process.      try      {        System.IO.File.Delete(@"C:/Users/Public/DeleteTest/test.txt");      }      catch (System.IO.IOException e)      {        Console.WriteLine(e.Message);        return;      }    }    // ...or by using FileInfo instance method.    System.IO.FileInfo fi = new System.IO.FileInfo(@"C:/Users/Public/DeleteTest/test2.txt");    try    {      fi.Delete();    }    catch (System.IO.IOException e)    {      Console.WriteLine(e.Message);    }    // Delete a directory. Must be writable or empty.    try    {      System.IO.Directory.Delete(@"C:/Users/Public/DeleteTest");    }    catch (System.IO.IOException e)    {      Console.WriteLine(e.Message);    }    // Delete a directory and all subdirectories with Directory static method...    if(System.IO.Directory.Exists(@"C:/Users/Public/DeleteTest"))    {      try      {        System.IO.Directory.Delete(@"C:/Users/Public/DeleteTest", true);      }      catch (System.IO.IOException e)      {        Console.WriteLine(e.Message);      }    }    // ...or with DirectoryInfo instance method.    System.IO.DirectoryInfo di = new System.IO.DirectoryInfo(@"C:/Users/Public/public");    // Delete this dir and all subdirs.    try    {      di.Delete(true);    }    catch (System.IO.IOException e)    {      Console.WriteLine(e.Message);    }  }}