怎么以流的方式将文件写入数据库.

如何以流的方式将文件写入数据库..
想把某些文件写入数据库中..需要的时候再调用出来..

如何以流的方式存取呢?

求指点...

------解决方案--------------------
其实就是blob字段得读写呀.

C/C++ code

void __fastcall TForm1::Button1Click(TObject *Sender)
{
  TADOQuery *Query = new TADOQuery(Application);
  Query->ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + ExtractFilePath(Application->ExeName) + "1.mdb;";
  Query->SQL->Text = "insert into  table1(ee)values('asddasd')";
  Query->ExecSQL();
  TMemoryStream *Inifile = new TMemoryStream();
  Inifile->LoadFromFile("123.ini");
  Query->SQL->Text = "update table1 set asd =:PHOTO where ee ='asddasd'" ;
  Query->Parameters->Items[0]->LoadFromStream(Inifile,ftBlob) ;
  Query->ExecSQL();
  Query->Close();
  delete Query;
  delete Inifile;

}
//---------------------------------------

void __fastcall TForm1::Button2Click(TObject *Sender)
{
  TADOQuery *Query = new TADOQuery(Application);
  Query->ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + ExtractFilePath(Application->ExeName) + "1.mdb;";
  Query->SQL->Text = "select * from table1 where ee ='asddasd'";
  Query->Open();
  TBlobField * pField1=(TBlobField *)Query->FieldByName("asd");
     if(!pField1->IsNull)
     {
   TADOBlobStream* pmem=new TADOBlobStream (pField1,bmRead);
   pmem->Seek(0,soFromBeginning);
   TMemoryStream *Inifile = new TMemoryStream();
   Inifile->LoadFromStream(pmem);
   Inifile->SaveToFile("12345.ini");
   delete Inifile;
   delete pmem;
     }
  Query->Close();
  delete Query;

}

怎么以流的方式将文件写入数据库.

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