根據給定檔案路徑，判斷該路徑為目錄還是檔案
最近寫了一個小程式，需要根據檔案路徑，來判斷該路徑為檔案還是資料夾，因為在MFC中複製檔案和資料夾的需要做不同處理，資料夾需要遞迴遍歷才能將其目錄下的東西複製完。而檔案則直接呼叫API函式CopyFile就能完成複製。
bool IsDirectory(CString filename)
{
DWORD dwAttr = GetFileAttributes(filename); //得到檔案屬性
if (dwAttr == 0xFFFFFFFF) // 檔案或目錄不存在
return false;
else if (dwAttr&FILE_ATTRIBUTE_DIRECTORY) // 如果是目錄
return true;
else
return false;
}
該函式主要利用API函式GetFileAttributes(CString strFileName)
以下是GetFileAttribute定義，摘自msdn：Retrieves a set of FAT file system attributes for a specified file or directory.得到FAT檔案系統的檔案屬性
Parameters
lpFileName
The name of the file or directory.In the ANSI version of this function, the name is limited to MAX_PATH characters. To extend this limit to 32,767 wide characters, call the Unicode version of the function and prepend "//?/"
to the path. For more information, see Naming a File.檔名或目錄名。最大長度為系統的檔名最大長度。如果是unicode環境，需要呼叫這個函式的unicode版本。
Return Value
If the function succeeds, the return value contains the attributes of the specified file or directory.
如果函式成功了，返回值會包含以下檔案屬性：
If the function fails, the return value is INVALID_FILE_ATTRIBUTES. To get extended error information, callGetLastError.
如果函式失敗，返回值是INVALID_FILE_ATTRIBUTES. 可以通過GetLastError獲取更詳細的出錯資訊
The attributes can be one or more of the following values.
檔案屬性可以是下列值的一個或多個的組合。
| Return code/value | Description |
|---|---|
|
FILE_ATTRIBUTE_ARCHIVE |
A file or directory that is an archive file or directory. Applications use this attribute to mark files for backup or removal. 存檔檔案 |
|
FILE_ATTRIBUTE_COMPRESSED |
A file or directory that is compressed. For a file, all of the data in the file is compressed. For a directory, compression is the default for newly created files and subdirectories. 壓縮檔案 |
|
FILE_ATTRIBUTE_DEVICE |
Reserved; do not use. |
|
FILE_ATTRIBUTE_DIRECTORY |
The handle that identifies a directory. 目錄檔案 |
|
FILE_ATTRIBUTE_ENCRYPTED |
A file or directory that is encrypted. For a file, all data streams in the file are encrypted. For a directory, encryption is the default for newly created files and subdirectories. 加密檔案 |
|
FILE_ATTRIBUTE_HIDDEN |
The file or directory is hidden. It is not included in an ordinary directory listing. 隱藏檔案 |
|
FILE_ATTRIBUTE_NORMAL |
A file or directory that does not have other attributes set. This attribute is valid only when used alone. |
|
FILE_ATTRIBUTE_NOT_CONTENT_INDEXED |
The file is not to be indexed by the content indexing service. |
|
FILE_ATTRIBUTE_OFFLINE |
The data of a file is not available immediately. This attribute indicates that the file data is physically moved to offline storage. This attribute is used by Remote Storage, which is the hierarchical storage management software. Applications should not arbitrarily change this attribute. |
|
FILE_ATTRIBUTE_READONLY |
A file or directory that is read-only. For a file, applications can read the file, but cannot write to it or delete it. For a directory, applications cannot delete it. |
|
FILE_ATTRIBUTE_REPARSE_POINT |
A file or directory that has an associated reparse point, or a file that is a symbolic link. |
|
FILE_ATTRIBUTE_SPARSE_FILE |
A file that is a sparse file. |
|
FILE_ATTRIBUTE_SYSTEM |
A file or directory that the operating system uses a part of, or uses exclusively. |
|
FILE_ATTRIBUTE_TEMPORARY |
A file that is being used for temporary storage. File systems avoid writing data back to mass storage if sufficient cache memory is available, because typically, an application deletes a temporary file after the handle is closed. In that scenario, the system can entirely avoid writing the data. Otherwise, the data is written after the handle is closed. |
|
FILE_ATTRIBUTE_VIRTUAL |
A file is a virtual file. |