private void rbMonth_Click(object sender, EventArgs e)
{
dtpFrom.Enabled = false;
dtpTo.Enabled = false;
btnFillter.Enabled = false;
chartRevenue.Series["Doanh Thu"].ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.Spline;
chartRevenue.DataSource = Revenue.GetTotalPriceByMonth();
chartRevenue.Series["Doanh Thu"].YValueMembers = "price";
chartRevenue.Series["Doanh Thu"].YValueType = System.Windows.Forms.DataVisualization.Charting.ChartValueType.String;
chartRevenue.Series["Doanh Thu"].XValueMember = "time";
chartRevenue.Series["Doanh Thu"].XValueType = System.Windows.Forms.DataVisualization.Charting.ChartValueType.String;
}
