c++针对数据库,文件的操作总结(原始)

1.将文件保存到sqlserver数据库的相关操作:
  Update t1 set filedata = ‘.txt’ , filedata = ( select * from openrowset( bulk ‘E:\1.txt’, SINGLE_BLOB ) as data ) where resultId = 5
  Select convert( varchar(8000), data ) from t1 where resultId = 2
  注:fileType: varchar(20), filedata: varbinary(MAX)
2.将sqlserver里的文件数据读出来到文件:
  CFile outfile(...); // 参考MSDN
  LPSTR buffer = (LPSTR)GlobalLock( cdbvariant.m_pbinary->m_hData );
  Outfile.Write(buffer,cdbvariant.m_pbinary->m_dwDataLength);
  GlobalLock(cdbvariant.m_pbinary->m_hData);
  Outfile.close();
  
  执行某个文件:
  shellExecute( NULL,NULL,_T(“12.doc”), NULL,_T(“E:\\12.doc”),NULL);
3.文件查找:
  CFileFind findfile;
  CString path = “D:\\”;
  If( path.Right(1) != “\\”) path = path + “\\*.bmp”;
  bool res = findfile.FindFile(path);
  While(res)
  {
    res = findfile.FindNextFile();
    if(!findfile.IsDots())
    {
      findfile.GetFileTitle();
      ....
    }
  }
4.MFC显示图片
  HBITMAP hp;
  hp = (HBITMAP)LoadImage(NULL,_T(findfile.GetFilePath()),IMAGE_BITMAP,0,0,LR_LOADFROMFILE|LRCREATEDIBSECTION);
  m_pictureshow.setBitmap(hp);
5.得到当前的时间
  CTime ct = CTime::GetCurrentTime();
  CString nowTime = ct.Format(“%Y-%m-%d  %H:%M:%S”);
6.连接数据库
  #include<afxdb.h>
  CDatabase cdb;
  if(!cdb.OpenEx( Getconnect(),CDatabase::noodbcDialog)){ return;}
  CRecordSet crs(&cdb);
  try
  {
    if( !crs.open( CRecordSet::dynamic, _T(“select * from t”)))
  { return ; }
  }catch( CDBException ee ){}
  short count = crs.GetODBCFiledCount();
  int row = 0;
  crs.MoveFirst();
  CDBVariant cdbvariant;
  while( !crs.IsEOF() )
  {
    int col =0;
    for( short index = 0; index < count; ++index)
    {
      crs.GetFileValue(index,cdbvariant);
      m_list.AddItem(row, ++col, ....);
    }
    ++row ;
    crs.MoveNext();
  }
  crs.close();
  cdb.close();
7.打开word保存数据
  Colevariant, CApplication, CDocuments, CDocument0, CSelection

 

posted on 2013-09-14 19:12  霏霏暮雨  阅读(1358)  评论(0编辑  收藏  举报

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