C#柱状图

private void lookUpEdit1_EditValueChanged(object sender, EventArgs e)//lookUpEdit1值改变事件
{
string ro = lookUpEdit2.EditValue.ToString();//ro获取值
if (ro == "")
{
MessageBox.Show("请先选择！");
return;

}
else if (dataGridView1.Rows.Count > 0)
{
chart1.Titles.Clear();
string title = comboBox2.SelectedItem.ToString() + " " + "通道统计";//标题显示
chart1.Titles.Add(title);
chart1.Series.Clear();
Series series = new Series(lookUpEdit2.Text.ToString());
this.chart1.DataSource = dataGridView1.DataSource;
series.XValueMember = "datetimes";//x轴
series.YValueMembers = ro;//y轴
series.Color = Color.Red;
series.IsValueShownAsLabel = true;
series.ChartType = SeriesChartType.Column;//类型为柱形图
chart1.Series.Add(series);
this.chart1.DataBind();//绑定数据
}
}