Delete folders, subfolders and files easily[转载]

c++ file and directory

Delete folders, subfolders and files easily

<PRE>void RecursiveDelete(CString szPath)
{
    CFileFind ff;
    CString path = szPath;
    
    if(path.Right(1) != "\\")
        path += "\\";

    path += "*.*";

    BOOL res = ff.FindFile(path);

    while(res)
    {
        res = ff.FindNextFile();
        if (!ff.IsDots() && !ff.IsDirectory())
            DeleteFile(ff.GetFilePath());
        else if (ff.IsDirectory())
        {
            path = ff.GetFilePath();
            RecursiveDelete(path);
            RemoveDirectory(path);
        }
    }
}</PRE>

The CreateDir function creates folders and subfolders thereby completing the whole path passed to it. If the folder already exists, it is left unaffected, but if it doesn't exist, it is created. The CreateDirectory WIN32 API lets us create a directory, but it works only if the parent directory already exists. This function overcomes this limitation.

<PRE>void CreateDir(char* Path)
{
 char DirName[256];
 char* p = Path;
 char* q = DirName; 
 while(*p)
 {
   if (('\\' == *p) || ('/' == *p))
   {
     if (':' != *(p-1))
     {
        CreateDirectory(DirName, NULL);
     }
   }
   *q++ = *p++;
   *q = '\0';
 }
 CreateDirectory(DirName, NULL);
}</PRE>

The DeleteAllFiles function deletes all the files (not folders) present in the specified path:

<PRE>void DeleteAllFiles(char* folderPath)
{
 char fileFound[256];
 WIN32_FIND_DATA info;
 HANDLE hp; 
 sprintf(fileFound, "%s\\*.*", folderPath);
 hp = FindFirstFile(fileFound, &info);
 do
    {
       sprintf(fileFound,"%s\\%s", folderPath, info.cFileName);
       DeleteFile(fileFound);
 
    }while(FindNextFile(hp, &info)); 
 FindClose(hp);
}</PRE>

The EmptyDirectory function deletes all the contents from a specified directory. The RemoveDirectory WIN32 API deletes an existing empty directory, but it doesn't work if the directory isn't empty. This function overcomes this limitation:

<PRE>void EmptyDirectory(char* folderPath)
{
 char fileFound[256];
 WIN32_FIND_DATA info;
 HANDLE hp; 
 sprintf(fileFound, "%s\\*.*", folderPath);
 hp = FindFirstFile(fileFound, &info);
 do
    {
        if (!((strcmp(info.cFileName, ".")==0)||
              (strcmp(info.cFileName, "..")==0)))
        {
          if((info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)==
                                     FILE_ATTRIBUTE_DIRECTORY)
          {
              string subFolder = folderPath;
              subFolder.append("\\");
              subFolder.append(info.cFileName);
              EmptyDirectory((char*)subFolder.c_str());
              RemoveDirectory(subFolder.c_str());
          }
          else
          {
              sprintf(fileFound,"%s\\%s", folderPath, info.cFileName);
              BOOL retVal = DeleteFile(fileFound);
          }
        }
 
    }while(FindNextFile(hp, &info)); 
 FindClose(hp);
}</PRE>

浏览目录dialog：

void CTestBrowseDlg::OnBrowse() 
{
    CString str;
    BROWSEINFO bi;
    char name[MAX_PATH];
    ZeroMemory(&bi,sizeof(BROWSEINFO));
    bi.hwndOwner=GetSafeHwnd();
    bi.pszDisplayName=name;
    bi.lpszTitle="Select folder";
    bi.ulFlags=BIF_USENEWUI;
    LPITEMIDLIST idl=SHBrowseForFolder(&bi);
    if(idl==NULL)
        return;
    SHGetPathFromIDList(idl,str.GetBuffer(MAX_PATH));
    str.ReleaseBuffer();
    m_Path=str;
    if(str.GetAt(str.GetLength()-1)!='\\')
        m_Path+="\\";
    UpdateData(FALSE);
}

posted on 2006-01-12 14:52 梦在天涯 阅读(25) 评论(2)  编辑 收藏 收藏至365Key 所属分类: C++ 、MFC

FeedBack:

# re: c++ file and directory

2006-01-12 15:12 | 小明

一点小问题：

因为DeleteFile不能Delete掉只读文件，所以最好在DeleteFile之前，使用SetFileAttributes(file,FILE_ATTRIBUTE_NORMAL);
  

# re: c++ file and directory

2006-01-12 16:39 | 梦在天涯

也可以用searchpath（）来找，是吗？可惜就是没有找到例子！
那位有的话，贡献一下啊，谢谢！