exists()

bool xtd::io::directory_info::exists ( ) const

overridevirtual

Gets a value indicating whether the directory exists.

Returns

true if the directory exists; otherwise, false.

Examples

The following example demonstrates a use of the Exists property in the context of copying a source directory to a target directory.

#include <xtd/xtd>
 
using namespace xtd;
using namespace xtd::collections::generic;
using namespace xtd::io;
 
class program {
public:
  // Copy a source directory to a target directory.
  static void copy_directory(const string& source_directory, const string& target_directory) {
    directory_info  source(source_directory);
    directory_info  target(target_directory);
 
    //Determine whether the source directory exists.
    if(!source.exists())
      return;
    if(!target.exists())
      target.create();
 
    //Copy files.
    list<file_info> source_files = source.get_files();
    for(size_t i = 0; i < source_files.size(); ++i)
      file::copy(source_files[i].full_name(), target.full_name() +"\\" + source_files[i].name(), true);
 
    //Copy directories.
    list<directory_info> source_directories = source.get_directories();
    for(size_t j = 0; j < source_directories.size(); ++j)
      copy_directory(source_directories[j].full_name(), target.full_name() + "\\" + source_directories[j].name());
  }
 
  static auto main() {
    // Specify the directories you want to manipulate.
    copy_directory("D:\\Tools","D:\\NewTools");
  }
};
 
startup_(program::main);

Remarks

The xtd::io::directory_info::exists property returns false if any error occurs while trying to determine if the specified file exists. This can occur in situations that raise exceptions such as passing a file name with invalid characters or too many characters, a failing or missing disk, or if the caller does not have permission to read the file.

Implements xtd::io::file_system_info.