Solved

How to read Unicode data in Oracle?

Posted on 2004-04-09
9
508 Views
Last Modified: 2013-11-20
Hi,

Does anyone know how to read Unicode data in Oracle database and write onto a text file? Because when I read it, some Unicode charaters change to "¿".

My code is:

void CMyDlg::ReadUnicode()
{
   _RecordsetPtr recordset = NULL;
   _CommandPtr command = NULL;
    _variant_t vRowsAffected;
    _variant_t vNull;
    vNull.vt = VT_ERROR;
    vNull.scode = DISP_E_PARAMNOTFOUND;
    HRESULT hr;
    hr = recordset.CreateInstance(__uuidof(Recordset));
    hr = command.CreateInstance(__uuidof(Command));

    command->ActiveConnection = GetConnection();
    command->CommandType      = adCmdText;
    command->CommandText      = "SELECT TEXT FROM UNICODE WHERE ID=1";

    recordset = command->Execute(&vRowsAffected, &vNull, adCmdText);

    if (recordset!=NULL)
    {
      recordset->MoveFirst();
      while (!recordset->adoEOF)
      {
             _variant_t vcode = recordset->Fields->GetItem(L"TEXT")->GetValue();
          recordset->MoveNext();
      }
    }
    recordset->Close();
    command->Release();
}

I have a string "đăng" stored in Oracle database and it displays in memory when I view it: "00142BBC  BF 00 BF 00 6E 00 67  ¿.¿.n.g".

Please help,
Thanks
0
Comment
Question by:regzero
9 Comments
 
LVL 12

Expert Comment

by:migel
ID: 10790406
Hi!
It seems like you put no UNICODE string into the database - Your data looks like you make it by
WCHAR* wch = L"uung";
where 'u' char is the locale specific char (not ASCII 127).
Can you fisrtly put proper unicode string into the base and test?
To make unicode string use MultiByteToWideChar API
0
 

Author Comment

by:regzero
ID: 10803356
I insert value from web using JSP. I set request.setCharacterEncoding("UTF-8").

For unicode characters with 0x00XX, e.g: "ê"->0x00EA, value is OK.
Ex, I have a string like this "lê lá là" in DB, and on the memory it shows:
001422E4  6C 00 EA 00 20 00 6C  l.ê. .l
001422EB  00 E1 00 20 00 6C 00  .á. .l.
001422F2  E0 00 00 00 00 00 02  à......

but with unicode value like 0xXXXX, e.g: "ạ"->0x1EA1, it's wrong. It converts value to "¿" ->0x00BF.
0
 

Author Comment

by:regzero
ID: 10856257
:) It's OK now, I solved it
0
Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

 
LVL 12

Expert Comment

by:migel
ID: 10857088
Hi!
Can you place here your solution ???? just for learning?
0
 

Author Comment

by:regzero
ID: 10926444
Hi Migel,
I didn't know you posted.

I found the document in Oracle page, it's all here:

http://otn.oracle.com/products/oracle8i/htdocs/OTN_ODBC_Unicode_cabaird.htm

Dang
0
 
LVL 1

Accepted Solution

by:
Computer101 earned 0 total points
ID: 12049849
PAQed, with points refunded (300)

Computer101
E-E Admin
0
 
LVL 7

Expert Comment

by:Nievergelt
ID: 12749483
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Introduction: Ownerdraw of the grid button.  A singleton class implentation and usage. Continuing from the fifth article about sudoku.   Open the project in visual studio. Go to the class view – CGridButton should be visible as a class.  R…
If you use Adobe Reader X it is possible you can't open OLE PDF documents in the standard. The reason is the 'save box mode' in adobe reader X. Many people think the protected Mode of adobe reader x is only to stop the write access. But this fe…
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
Along with being a a promotional video for my three-day Annielytics Dashboard Seminor, this Micro Tutorial is an intro to Google Analytics API data.

867 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

13 Experts available now in Live!

Get 1:1 Help Now