public void ClearCellFormat(bool clearAll)
{
if (clearAll)
{
Excel.Worksheet ws = app.ActiveWorkbook.ActiveSheet;
ws.UsedRange.ClearFormats();
ws.UsedRange.ClearNotes();
}
else
{
Excel.Range range = app.Selection as Excel.Range;
if (range != null)
{
range.ClearFormats();
range.ClearNotes();
}
}
}
