/// <summary>
/// Writes the element value to the stream.
/// </summary>
/// <param name="stream">The stream to write that positioned at the proper location to write.</param>
/// <param name="syntax">The tranfer syntax to use if the value is binary.</param>
/// <param name="encoding">The specific character set to use if the value is text.</param>
/// <param name="options">The options used to encode tags.</param>
protected override void WriteValueOnStream(Stream stream, string syntax, SpecificCharacterSet encoding, DataSetOptions options)
{
EndianBinaryWriter writer = new EndianBinaryWriter(stream, Syntax.GetEndian(syntax));
if (Syntax.CanEncapsulatePixelData(syntax))
{
WriteEncapsulatedPixelData(writer);
}
else
{
if (vr == "OW")
{
short[] words = Value as short[];
foreach (short word in words)
{
writer.Write(word);
}
}
else if (vr == "OB")
{
byte[] value = Value as byte[];
writer.Write((byte[])value);
if (value.Length % 2 != 0)
{
writer.Write('\0');
}
}
else
{
throw new Exception(String.Format("Unexpected vr={0} in WriteValueOnStream", vr));
}
}
}
/// <summary>
/// This method reads the value from the stream and sets the vm for string types
/// </summary>
/// <param name="stream">The stream to read the data from.</param>
/// <param name="syntax">The transfer syntax used to interpret binary data.</param>
/// <param name="encoding">The encoding to use to decode string data.</param>
/// <param name="length">The length, in bytes, of the data to read.</param>
/// <remarks>The stream is assumed to be positioned at the beginning of the encoded tag value.</remarks>
protected override void ReadValueFromStream(Stream stream, string syntax, SpecificCharacterSet encoding, uint length)
{
this.length = length;
EndianBinaryReader reader = new EndianBinaryReader(stream, Syntax.GetEndian(syntax));
if (length == 0xFFFFFFFF)
{
if (!Syntax.CanEncapsulatePixelData(syntax))
{
throw new Exception(String.Format("Current syntax {0} does not support Encapsulated Pixel Data.", syntax, this.tag.Name));
}
ReadEncapsulatedPixelData(reader);
}
else
{
ReadNativePixelData(reader);
}
}