Thanks at first.

I want to create a dcm file with compressed pixel data. That is ,when i have native original pixel data,how to compress them into compressed ones and add them into a dcm file?

 

 

 

I tried to use the following code :
byte[] pixelArray = new byte[length];

for (uint i = 0; i < length; i += 2)
pixelArray = (byte)(i % 255);

pixels.Values = pixelArray;

theSet[DicomTags.PixelData] = pixels;

DicomUncompressedPixelData pd = new DicomUncompressedPixelData(theSet);
MessageBox.Show(pd.UncompressedFrameSize.ToString()); //131072

DicomCompressedPixelData cpd = new DicomCompressedPixelData(pd);

DicomJpegParameters parms = new DicomJpegParameters();
parms.Quality = 70;
parms.ConvertColorspaceToRGB = true;

IDicomCodec codec = DicomCodecRegistry.GetCodec(TransferSyntax.JpegBaselineProcess1);
codec.Encode(pd, cpd, parms);

but the program threw an error like this: The type initializer for 'ClearCanvas.Dicom.Codec.DicomCodecRegistry' threw an exception.

What's wrong?

Any help would be appreciated.

Is there any more exception detail in the logs?