富文本框通过流读取RTF文本文件

最新推荐文章于 2024-06-26 09:32:40 发布

Jerry-se

最新推荐文章于 2024-06-26 09:32:40 发布

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分类专栏： Windows核心编程文章标签：富文本框 StreamIn RTF文件

本文链接：https://blog.youkuaiyun.com/u011115292/article/details/81218481

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平台为win32+duilib，其他环境类似。

static DWORD CALLBACK streamInCallback(DWORD_PTR dwCookie, LPBYTE pbBuff, LONG cb, LONG *pcb)
{
ReadFile((HANDLE)dwCookie, pbBuff, cb, (LPDWORD)pcb, NULL);//读取数据
return 0;
}

BOOL ReadFileByStreamIn(CRichEditUI* hRichEdit, LPCTSTR pszFileName)
{
HRESULT hr;

   HANDLE hFile = CreateFile(pszFileName, GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
   if (hFile == INVALID_HANDLE_VALUE)
       return FALSE;

   EDITSTREAM es;
   es.dwCookie = (DWORD_PTR)hFile;
   es.pfnCallback = streamInCallback;

   hRichEdit->SetSel(0, -1);
   DWORD dwStart, dwEnd;
   hRichEdit->GetSel((long&)dwStart, (long&)dwEnd);
   hRichEdit->SetSel(dwEnd + 1, dwEnd + 1);
   //hRichEdit->ReplaceSel(L"\n", TRUE);

   CDuiString strFileName(pszFileName);
   CDuiString strExt = strFileName.Right(4);
   if (strExt == _T(".txt"))
       hr = hRichEdit->StreamIn(SF_TEXT | SFF_SELECTION, es);
   else if (strExt == _T(".rtf"))
       hr = hRichEdit->StreamIn(SF_RTF | SFF_SELECTION, es);

   CloseHandle(hFile);
   if (FAILED(hr))
   {
       return FALSE;
   }
   return TRUE;
}

写入文本可以此类推。