private void btnMonth_Click(object sender, EventArgs e) { string Date = monthprofit.SelectionRange.Start.ToString("yyyy-MM"); dataIncome.ClearSelection(); dataExpense.ClearSelection(); dataProfitability.ClearSelection(); dataIncome.DataSource = incoming.GetIncomeListMonth(Date); dataExpense.DataSource = incoming.GetExpenseListMonth(Date); dataProfitability.DataSource = incoming.GetProfitListMonth(Date); }