VC下遍歷文件夾查找文件

今天看到以前的一些代碼，覺得比較常用，放在下面供初學者使用吧。下面的代碼都採用VS2002編譯測試通過。參數dir是查找的根目錄，filename爲要查找的文件名（區分大小寫）， 第三個參數爲找到後返回找到的文件路徑，傳入TCHAR resultPath[MAX_PATH];類型。

 

 /** * 1. 採用Win32 API: FindFirstFile() 和 WIN32_FIND_DATA */ HRESULT AcadDocProcessor::FindFile(LPCTSTR dir, LPCTSTR filename, LPTSTR resultPath) { HRESULT hr = E_FAIL; TCHAR tmpDirExpr[MAX_PATH]; memset(tmpDirExpr, 0, MAX_PATH * sizeof(TCHAR)); strcat(tmpDirExpr, dir); strcat(tmpDirExpr,_T("//*")); WIN32_FIND_DATA FindFileData; HANDLE hFind=::FindFirstFile(tmpDirExpr,&FindFileData); if(INVALID_HANDLE_VALUE == hFind) return hr; while(TRUE) { if(FindFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) { if(FindFileData.cFileName[0]!='.') { TCHAR szFile[MAX_PATH]; strcpy(szFile, dir); strcat(szFile, "//"); strcat(szFile, FindFileData.cFileName); hr = FindFile(szFile, filename, resultPath); if(SUCCEEDED(hr)) break; } } else { if(strcmp(FindFileData.cFileName, filename) == 0) { strcpy(resultPath, dir); strcat(resultPath, "//"); strcat(resultPath, FindFileData.cFileName); //DWORD len = strlen(FindFileData.cFileName) * sizeof(TCHAR) + 1; //memcpy(resultPath, FindFileData.cFileName, len); hr = S_OK; break; } } if(!FindNextFile(hFind,&FindFileData)) break; } FindClose(hFind); return hr; } /** * 2. 採用MFC CFileFind類 */ HRESULT AcadDocProcessor::FindFile(LPCTSTR dir, LPCTSTR filename, LPTSTR resultPath) { HRESULT hr = E_FAIL; DWORD len = (strlen(dir) + 5) * sizeof(TCHAR); LPTSTR tmpDirExpr = new TCHAR[strlen(dir) + 5]; memset(tmpDirExpr, 0, len); strcat(tmpDirExpr, dir); strcat(tmpDirExpr,_T("//*")); CFileFind *pfilefind = new CFileFind(); BOOL isResOK = pfilefind->FindFile((LPCTSTR)tmpDirExpr); while(isResOK) { isResOK = pfilefind->FindNextFile(); if(!pfilefind->IsDots()) { CString foundPathStr = pfilefind->GetFilePath(); if(foundPathStr == filename) { DWORD len = (foundPathStr.GetLength() + 1) * sizeof(TCHAR); memcpy(resultPath,foundPathStr.GetBuffer(), len); foundPathStr.ReleaseBuffer(); hr = S_OK; break; } if(pfilefind->IsDirectory()) { CString subDir = pfilefind->GetFilePath(); if(SUCCEEDED(FindFile(subDir, filename, resultPath))) { hr = S_OK; break; } //free(newSubDir); } } } pfilefind->Close(); delete pfilefind; delete tmpDirExpr; return hr; }