Hello forum,
I have excel file with this pattern:
Qt Code: 
  1. ID              #1  #2  #3
  2.        NAME     A     B    C
  3. #1      A       x
  4. #2      B             x
  5. #3      C       x
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"X" means that the row belongs to the column.
Qt Code: 
  1. QString path = fileName;
  2.     sheet = nullptr;
  3.     sheets = nullptr;
  4.     workbook = nullptr;
  5.     workbooks = nullptr;
  6.     excelApplication = nullptr;
  7.  
  8.     if(path == "")
  9.     {
  10.         qDebug() << "'fileName' is empty!";
  11.         return;
  12.     }
  13.     path.replace("/", "\\");
  14.  
  15.     excelApplication = new QAxObject( "Excel.Application", 0 );
  16.  
  17.     if (excelApplication == nullptr)
  18.         throw invalid_argument("Failed to initialize interop with Excel (probably Excel is not installed)");
  19.  
  20.     excelApplication->dynamicCall( "SetVisible(bool)", false ); // hide excel
  21.     excelApplication->setProperty( "DisplayAlerts", 0); // disable alerts
  22.  
  23.     workbooks = excelApplication->querySubObject( "Workbooks" );
  24.     workbook = workbooks->querySubObject( "Open(const QString&)", path );
  25.     sheets = workbook->querySubObject( "Worksheets" );
  26.  
  27. ...
  28. ...
  29.  
  30. for(int i=0; i<rowsCnt; ;++i)
  31.    for(int j=0; j<colsCnt; ;++j)
  32.       {
  33.          QAxObject* cell = sheet->querySubObject( "Cells( int, int )", i, j);
  34.          QVariant value = cell->dynamicCall( "Value()" );
  35.          dataRow.append(value);
  36.       }
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It works fine, but the execution time is slow, especially at a larger table (200x200 or more).

My question is if exist faster way to read excel file.

Thanks for any advice!