public void AddOrUpdate(string date, ExcelRow newRowData)
{
if (content.ContainsKey(date))
{
ExcelRow oldRowData = content[date] as ExcelRow;
newRowData.AddOther(oldRowData);
content[date] = newRowData;
}
else
{
newRowData.appStart = DateTime.Now.GetTime();
content.Add(date, newRowData);
}
WriteContentToFile();
Save();
}