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How to: Copy a Directory to Another Directory in Visual Basic 

Use the My.Computer.FileSystem.CopyDirectory Method method to copy a directory to another directory. This method copies the contents of the directory as well as the directory itself. If the target directory does not exist, it will be created. If a directory with the same name exists in the target location and overwrite is set to False, the contents of the two directories will be merged. You can specify a new name for the directory during the operation.

When copying files within a directory, exceptions may be thrown that are caused by specific file, such as a file existing during a merge while overwrite is set to False. When such exceptions are thrown, they are consolidated into a single exception, whose Data property holds entries in which the file or directory path is the key and the specific exception message is contained in the corresponding value.

To copy a directory to another directory

  • Use the CopyDirectory method, specifying source and destination directory names. The following example copies the directory named TestDirectory1 into TestDirectory2, overwriting existing files.

    My.Computer.FileSystem.CopyDirectory("C:\TestDirectory1", "C:\TestDirectory2", True)
    
    

    This code example is also available as an IntelliSense code snippet. In the code snippet picker, it is located in File system - Processing Drives, Folders, and Files. For more information, see How to: Insert Snippets Into Your Code (Visual Basic).

Robust Programming

The following conditions may cause an exception:

  • The new name specified for the directory contains a colon (:) or slash (\ or /) (ArgumentException).

  • The path is not valid for one of the following reasons: it is a zero-length string, it contains only white space, it contains invalid characters, or it is a device path (starts with \\.\) (ArgumentException).

  • The path is not valid because it is Nothing (ArgumentNullException).

  • destinationDirectoryName is Nothing or an empty string (ArgumentNullException)

  • The source directory does not exist (DirectoryNotFoundException).

  • The source directory is a root directory (IOException).

  • The combined path points to an existing file (IOException).

  • The source path and target path are the same (IOException).

  • ShowUI is set to UIOption.AllDialogs and the user cancels the operation, or one or more files in the directory cannot be copied (OperationCanceledException).

  • The operation is cyclic (InvalidOperationException).

  • The path contains a colon (:) (NotSupportedException).

  • The path exceeds the system-defined maximum length (PathTooLongException).

  • A file or folder name in the path contains a colon (:) or is in an invalid format (NotSupportedException).

  • The user lacks necessary permissions to view the path (SecurityException).

  • A destination file exists but cannot be accessed (UnauthorizedAccessException).

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