private void btnAll_Click(object sender, EventArgs e)
{
dataIncome.ClearSelection();
dataExpense.ClearSelection();
dataProfitability.ClearSelection();
dataIncome.DataSource = incoming.GetIncomeListYear();
dataExpense.DataSource = incoming.GetExpenseListYear();
dataProfitability.DataSource = incoming.GetProfitListYear();
}
