Reading HDf5 compund files using c#

Hdf-forum archives
1

I have written a many HDF5 files that are compound data. They can be
viewed by the HDF viewer and other applications. The issue I am having is
I cannot seem to get the “H5D.read” command in C# coded correctly.

ForecastRec[] data = new ForecastRec[100000];
int recount = 0;
string FileName = Convert.ToString(myReaderInv["InventoryId"]);

Int32 maxcount = Convert.ToInt32(myReaderInv["MaxCount"]);
string File = @"" + HDF5Path + FileName + ".H5";
//--- HDF5 File Handling -----------------------------------//--
H5.Open();
H5FileId FileId = H5F.open(File, H5F.OpenMode.ACC_RDONLY); //-- open the
file
H5DataSetId DataSetId = H5D.open(FileId, FileName); //-- open the
dataset
H5DataSpaceId DataSpaceId = H5D.getSpace(DataSetId); //--
var DataSetSize = H5S.getSimpleExtentDims(DataSpaceId); //-- gets the
actual # of rows
var dataType = H5D.getType(DataSetId);
(These are two different attempts but neither will compile.)

H5D.read(DataSetId, dataType, H5Array<byte>(data));
H5D.read(DataSetId, H5T.CreateClass.COMPOUND, H5Array<compound>(data));

Anyone out there that can help?

2

I'm using C# and read compound data. I use my own wrapper for the H5PT instead of H5D, so it differs a bit.

But, make sure you allocate space including new-ing the H5Array. Also I know my data type going in, I'm not sure it will work by just putting out a byte array. So perhaps...

compound_type[] cpd = new compound_type[size];

H5Array<compound_type> cpdData = new H5Array<compound_type>(cpd);

H5D.read(DataSetId, dataType, cpdData);

Scott

···

________________________________
From: Hdf-forum [hdf-forum-bounces@lists.hdfgroup.org] on behalf of Charles Henderson [charlesshenderson@gmail.com]
Sent: Tuesday, June 25, 2013 9:54 AM
To: hdf-forum@lists.hdfgroup.org
Subject: [Hdf-forum] Reading HDf5 compund files using c#

I have written a many HDF5 files that are compound data. They can be viewed by the HDF viewer and other applications. The issue I am having is I cannot seem to get the “H5D.read” command in C# coded correctly.

ForecastRec[] data = new ForecastRec[100000];
int recount = 0;
string FileName = Convert.ToString(myReaderInv["InventoryId"]);
Int32 maxcount = Convert.ToInt32(myReaderInv["MaxCount"]); string File = @"" + HDF5Path + FileName + ".H5";
//--- HDF5 File Handling -----------------------------------//--
H5.Open();
H5FileId FileId = H5F.open(File, H5F.OpenMode.ACC_RDONLY); //-- open the file
H5DataSetId DataSetId = H5D.open(FileId, FileName); //-- open the dataset
H5DataSpaceId DataSpaceId = H5D.getSpace(DataSetId); //--
var DataSetSize = H5S.getSimpleExtentDims(DataSpaceId); //-- gets the actual # of rows
var dataType = H5D.getType(DataSetId);
(These are two different attempts but neither will compile.)

H5D.read(DataSetId, dataType, H5Array<byte>(data));
H5D.read(DataSetId, H5T.CreateClass.COMPOUND, H5Array<compound>(data));

Anyone out there that can help?

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