创建目录+子目录

Question

I've got a directory location, how can I create all the directories? eg C:\\Match\\Upload will create both Match and the sub-directory Upload if it doesn't exist.

Using C# 3.0

Thanks

Answer 1

Directory.CreateDirectory (@"C:\\Match\\Upload") will sort this all out for you. You don't need to create all the subdirectories! The create directory method creates all directories and sub directories for you.

Answer 2

if (!System.IO.Directory.Exists(@"C:\Match\Upload"))
{
  System.IO.Directory.CreateDirectory(@"C:\Match\Upload");
}

Answer 3

for googlers: in pure win32/C++, use SHCreateDirectoryEx

inline void EnsureDirExists(const std::wstring& fullDirPath)
{
    HWND hwnd = NULL;
    const SECURITY_ATTRIBUTES *psa = NULL;
    int retval = SHCreateDirectoryEx(hwnd, fullDirPath.c_str(), psa);
    if (retval == ERROR_SUCCESS || retval == ERROR_FILE_EXISTS || retval == ERROR_ALREADY_EXISTS)
        return; //success

    throw boost::str(boost::wformat(L"Error accessing directory path: %1%; win32 error code: %2%") 
        % fullDirPath
        % boost::lexical_cast<std::wstring>(retval));

    //TODO *djg* must do error handling here, this can fail for permissions and that sort of thing
}

Answer 4

Here is an example with a DirectoryInfo object that will create the directory and all subdirectories:

var path = @"C:\Foo\Bar";
new System.IO.DirectoryInfo(path).Create();

Calling Create() will not error if the path already exists.

If it is a file path you can do:

var path = @"C:\Foo\Bar\jazzhands.txt";
new System.IO.FileInfo(path).Directory.Create();