Live SpreadsheetGear API Samples
Workbook Opening Opening from Stream or Byte Array
In addition to opening from disk, SpreadsheetGear can also open from a memory stream or byte array using the IWorkbooks.OpenFromStream(...) and OpenFromMemory(...) methods. You can access IWorkbooks and these methods by first creating an IWorkbookSet, as demonstrated below.
Related Samples
Workbook > Opening