public void TestDetectAsPOIFS()
{
Stream in1;
// ooxml file is
in1 = new PushbackStream(
HSSFTestDataSamples.OpenSampleFileStream("SampleSS.xlsx")
);
Assert.IsTrue(POIXMLDocument.HasOOXMLHeader(in1));
in1.Dispose();
// xls file isn't
in1 = new PushbackStream(
HSSFTestDataSamples.OpenSampleFileStream("SampleSS.xls")
);
Assert.IsFalse(POIXMLDocument.HasOOXMLHeader(in1));
in1.Dispose();
// text file isn't
in1 = new PushbackStream(
HSSFTestDataSamples.OpenSampleFileStream("SampleSS.txt")
);
Assert.IsFalse(POIXMLDocument.HasOOXMLHeader(in1));
in1.Dispose();
}
public static IWorkbook Create(Stream inputStream)
{
inputStream = (Stream) new PushbackStream(inputStream);
if (POIFSFileSystem.HasPOIFSHeader(inputStream))
{
return((IWorkbook) new HSSFWorkbook(inputStream));
}
inputStream.Position = 0L;
if (POIXMLDocument.HasOOXMLHeader(inputStream))
{
return((IWorkbook) new XSSFWorkbook(OPCPackage.Open(inputStream)));
}
throw new ArgumentException("Your InputStream was neither an OLE2 stream, nor an OOXML stream.");
}
/// <summary>
/// Creates the appropriate HSSFWorkbook / XSSFWorkbook from
/// the given InputStream. The Stream is wraped inside a PushbackInputStream.
/// </summary>
/// <param name="inputStream">Input Stream of .xls or .xlsx file</param>
/// <returns>IWorkbook depending on the input HSSFWorkbook or XSSFWorkbook is returned.</returns>
// Your input stream MUST either support mark/reset, or
// be wrapped as a {@link PushbackInputStream}!
public static IWorkbook Create(Stream inputStream)
{
// If Clearly doesn't do mark/reset, wrap up
//if (!inp.MarkSupported())
//{
// inp = new PushbackInputStream(inp, 8);
//}
inputStream = new PushbackStream(inputStream);
if (POIFSFileSystem.HasPOIFSHeader(inputStream))
{
return(new HSSFWorkbook(inputStream));
}
inputStream.Position = 0;
if (POIXMLDocument.HasOOXMLHeader(inputStream))
{
return(new XSSFWorkbook(OPCPackage.Open(inputStream)));
}
throw new ArgumentException("Your stream was neither an OLE2 stream, nor an OOXML stream.");
}
public void TestFileCorruption()
{
// create test InputStream
byte[] testData = { (byte)1, (byte)2, (byte)3 };
ByteArrayInputStream testInput = new ByteArrayInputStream(testData);
// detect header
InputStream in1 = new PushbackInputStream(testInput, 10);
Assert.IsFalse(DocumentFactoryHelper.HasOOXMLHeader(in1));
//noinspection deprecation
Assert.IsFalse(POIXMLDocument.HasOOXMLHeader(in1));
// check if InputStream is still intact
byte[] test = new byte[3];
Assert.AreEqual(3, in1.Read(test));
Assert.IsTrue(Arrays.Equals(testData, test));
Assert.AreEqual(-1, in1.Read());
}
public IWorkbook NPOIOpenExcel(string filename)
{
Stream excelStream = OpenResource(filename);
if (POIFSFileSystem.HasPOIFSHeader(excelStream))
{
return(new HSSFWorkbook(excelStream));
}
if (POIXMLDocument.HasOOXMLHeader(excelStream))
{
return(new XSSFWorkbook(OPCPackage.Open(excelStream)));
}
if (filename.EndsWith(".xlsx"))
{
return(new XSSFWorkbook(excelStream));
}
if (filename.EndsWith(".xls"))
{
new HSSFWorkbook(excelStream);
}
throw new Exception("Your InputStream was neither an OLE2 stream, nor an OOXML stream");
}