/// <summary>
/// Write dataset to stream
/// </summary>
/// <param name="dataset">Dataset</param>
/// <param name="options">DICOM write options</param>
/// <returns>Status code</returns>
public DicomWriteStatus Write(DcmDataset dataset, DicomWriteOptions options)
{
TransferSyntax = dataset.InternalTransferSyntax;
dataset.SelectByteOrder(_syntax.Endian);
foreach (DcmItem item in dataset.Elements)
{
if (item.Tag.Element == 0x0000)
{
continue;
}
if (Flags.IsSet(options, DicomWriteOptions.CalculateGroupLengths) &&
item.Tag.Group != _group && item.Tag.Group <= 0x7fe0)
{
_group = item.Tag.Group;
_writer.Write((ushort)_group);
_writer.Write((ushort)0x0000);
if (_syntax.IsExplicitVR)
{
_writer.Write((byte)'U');
_writer.Write((byte)'L');
_writer.Write((ushort)4);
}
else
{
_writer.Write((uint)4);
}
_writer.Write((uint)dataset.CalculateGroupWriteLength(_group, _syntax, options));
}
_writer.Write((ushort)item.Tag.Group);
_writer.Write((ushort)item.Tag.Element);
if (_syntax.IsExplicitVR)
{
_writer.Write((byte)item.VR.VR[0]);
_writer.Write((byte)item.VR.VR[1]);
}
if (item is DcmItemSequence)
{
DcmItemSequence sq = item as DcmItemSequence;
if (_syntax.IsExplicitVR)
{
_writer.Write((ushort)0x0000);
}
if (Flags.IsSet(options, DicomWriteOptions.ExplicitLengthSequence) || (item.Tag.IsPrivate && !_syntax.IsExplicitVR))
{
int hl = _syntax.IsExplicitVR ? 12 : 8;
_writer.Write((uint)sq.CalculateWriteLength(_syntax, options & ~DicomWriteOptions.CalculateGroupLengths) - (uint)hl);
}
else
{
_writer.Write((uint)UndefinedLength);
}
foreach (DcmItemSequenceItem ids in sq.SequenceItems)
{
ids.Dataset.ChangeTransferSyntax(dataset.InternalTransferSyntax, null);
_writer.Write((ushort)DicomTags.Item.Group);
_writer.Write((ushort)DicomTags.Item.Element);
if (Flags.IsSet(options, DicomWriteOptions.ExplicitLengthSequenceItem))
{
_writer.Write((uint)ids.CalculateWriteLength(_syntax, options & ~DicomWriteOptions.CalculateGroupLengths) - (uint)8);
}
else
{
_writer.Write((uint)UndefinedLength);
}
Write(ids.Dataset, options & ~DicomWriteOptions.CalculateGroupLengths);
if (!Flags.IsSet(options, DicomWriteOptions.ExplicitLengthSequenceItem))
{
_writer.Write((ushort)DicomTags.ItemDelimitationItem.Group);
_writer.Write((ushort)DicomTags.ItemDelimitationItem.Element);
_writer.Write((uint)0x00000000);
}
}
if (!Flags.IsSet(options, DicomWriteOptions.ExplicitLengthSequence) && !(item.Tag.IsPrivate && !_syntax.IsExplicitVR))
{
_writer.Write((ushort)DicomTags.SequenceDelimitationItem.Group);
_writer.Write((ushort)DicomTags.SequenceDelimitationItem.Element);
_writer.Write((uint)0x00000000);
}
}
else if (item is DcmFragmentSequence)
{
DcmFragmentSequence fs = item as DcmFragmentSequence;
if (_syntax.IsExplicitVR)
{
_writer.Write((ushort)0x0000);
}
_writer.Write((uint)UndefinedLength);
_writer.Write((ushort)DicomTags.Item.Group);
_writer.Write((ushort)DicomTags.Item.Element);
if (Flags.IsSet(options, DicomWriteOptions.WriteFragmentOffsetTable) && fs.HasOffsetTable)
{
_writer.Write((uint)fs.OffsetTableBuffer.Length);
fs.OffsetTableBuffer.CopyTo(_writer.BaseStream);
}
else
{
_writer.Write((uint)0x00000000);
}
foreach (ByteBuffer bb in fs.Fragments)
{
_writer.Write((ushort)DicomTags.Item.Group);
_writer.Write((ushort)DicomTags.Item.Element);
_writer.Write((uint)bb.Length);
bb.CopyTo(_writer.BaseStream);
}
_writer.Write((ushort)DicomTags.SequenceDelimitationItem.Group);
_writer.Write((ushort)DicomTags.SequenceDelimitationItem.Element);
_writer.Write((uint)0x00000000);
}
else
{
DcmElement de = item as DcmElement;
if (_syntax.IsExplicitVR)
{
if (de.VR.Is16BitLengthField)
{
_writer.Write((ushort)de.Length);
}
else
{
_writer.Write((ushort)0x0000);
_writer.Write((uint)de.Length);
}
}
else
{
_writer.Write((uint)de.Length);
}
de.ByteBuffer.CopyTo(_writer.BaseStream);
}
}
return(DicomWriteStatus.Success);
}