public static DicomFile Open(string fileName)
{
DicomFile df = new DicomFile();
try {
df.File = new FileReference(fileName);
using (var source = new FileByteSource(df.File)) {
DicomFileReader reader = new DicomFileReader();
reader.Read(source,
new DicomDatasetReaderObserver(df.FileMetaInfo),
new DicomDatasetReaderObserver(df.Dataset));
df.Format = reader.FileFormat;
df.Dataset.InternalTransferSyntax = reader.Syntax;
return(df);
}
} catch (Exception e) {
throw new DicomFileException(df, e.Message, e);
}
}
/// <summary>
/// Asynchronously reads the specified filename and returns a DicomFile object. Note that the values for large
/// DICOM elements (e.g. PixelData) are read in "on demand" to conserve memory. Large DICOM elements
/// are determined by their size in bytes - see the default value for this in the FileByteSource._largeObjectSize
/// </summary>
/// <param name="fileName">The filename of the DICOM file</param>
/// <param name="fallbackEncoding">Encoding to apply when attribute Specific Character Set is not available.</param>
/// <param name="stop">Stop criterion in dataset.</param>
/// <param name="readOption">Option how to deal with large values, if they should be loaded directly into memory or lazy loaded on demand</param>
/// <param name="largeObjectSize">Custom limit of what are large values and what are not. If 0 is passend, then the default of 64k is used.</param>
/// <returns>Awaitable <see cref="DicomFile"/> instance.</returns>
public static async Task <DicomFile> OpenAsync(string fileName, Encoding fallbackEncoding, Func <ParseState, bool> stop = null, FileReadOption readOption = FileReadOption.Default, int largeObjectSize = 0)
{
if (fallbackEncoding == null)
{
throw new ArgumentNullException(nameof(fallbackEncoding));
}
var df = new DicomFile();
try
{
df.File = Setup.ServiceProvider.GetService <IFileReferenceFactory>().Create(fileName);
using var unvalidated = new UnvalidatedScope(df.Dataset);
using var source = new FileByteSource(df.File, readOption, largeObjectSize);
var reader = new DicomFileReader();
var result =
await
reader.ReadAsync(
source,
new DicomDatasetReaderObserver(df.FileMetaInfo),
new DicomDatasetReaderObserver(df.Dataset, fallbackEncoding),
stop).ConfigureAwait(false);
HandleOpenError(df, result);
df.IsPartial = result == DicomReaderResult.Stopped || result == DicomReaderResult.Suspended;
df.Format = reader.FileFormat;
df.Dataset.InternalTransferSyntax = reader.Syntax;
return(df);
}
catch (Exception e)
{
throw new DicomFileException(df, e.Message, e);
}
}
