public void X006_Xlsx_DeleteAdd_CoreExtendedProperties()
{
var docName = "Spreadsheet.xlsx";
var ba = File.ReadAllBytes(s_TestFileLocation + docName);
using (MemoryStream ms = new MemoryStream())
{
ms.Write(ba, 0, ba.Length);
using (SpreadsheetDocument doc = SpreadsheetDocument.Open(ms, true))
{
var corePart = doc.CoreFilePropertiesPart;
var appPart = doc.ExtendedFilePropertiesPart;
doc.DeletePart(corePart);
doc.DeletePart(appPart);
doc.AddCoreFilePropertiesPart();
doc.AddExtendedFilePropertiesPart();
doc.AddCustomFilePropertiesPart();
doc.AddDigitalSignatureOriginPart();
doc.AddExtendedPart("relType", "contentType/xml", ".xml");
var tnPart = doc.AddThumbnailPart(ThumbnailPartType.Jpeg);
doc.DeletePart(tnPart);
tnPart = doc.AddThumbnailPart("image/jpg");
OpenXmlValidator v = new OpenXmlValidator(FileFormatVersions.Office2013);
var errs = v.Validate(doc);
Assert.Equal(1, errs.Count());
}
}
}