VC下遍历文件夹查找文件

今天看到以前的一些代码，觉得比较常用，放在下面供初学者使用吧。下面的代码都采用VS2002编译测试通过。参数dir是查找的根目录，filename为要查找的文件名（区分大小写）， 第三个参数为找到后返回找到的文件路径，传入TCHAR resultPath[MAX_PATH];类型。

 

 /*** 1. 采用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. 采用MFC CFileFind类*/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;}