Re: [Gdcm2] convert attribute value

[Niels D. - a. u. 2. <nie...@xs...>]

cldl at gmx... wrote:
> i have a question about converting attribute values to an string.
>
> I know two ways to get the string from the attribute value.
>
>        1) std::cout << dataElement.GetValue() << std::endl;
>
>        2) using StringFilter class
>
> If i use the  first way i have to convert some Binary VR by hand.
> This works so far, but if the attribute contains  umlauts (...)
> the string gets "Loaded:XX".
>
> If i use the StringFilter class to get the string everything looks
> fine.
> But if  i'm not go wrong it is not possible to use  the StringFilter
> in SQ's datasets. ?!


I encountered a similar problem in the past, but I managed to get the raw 
bytes out of the GDCM Value, at least if it is a ByteValue. As follows:

  const gdcm::Value& value = dataElement.GetValue();
  const gdcm::ByteValue* const byteValue = dynamic_cast<const 
gdcm::ByteValue*>(&value);

  if ( byteValue == NULL )
  {
    std::ostringstream outputStringStream;
    value.Print(outputStringStream);
    std::string str = outputStringStream.str();
  }
  else
  {
    // It's a Byte Value, so get the bytes!
    const std::vector<char>& bytes = *byteValue;
    std::string str(bytes.begin(), bytes.end());
  }

The resulting std::string may not always be a proper ASCII string, depending 
on the Value Representation (VR). However, any umlaut or trema is likely to 
be preserved. Is that of any help to you?


> (sorry Mathieu for the two invalid posts, i had
> problems with the mail client...)

LOL I was just about to send Mathieu a spam report about you  :-D


Kind regards, Niels
--
Niels Dekker
http://www.xs4all.nl/~nd/dekkerware
Scientific programmer at LKEB, Leiden University Medical Center