this.chartControl1.Series.Clear();//清空

//获得数据
sqldb sqldb = new sqldb();
string sql = "select T_Cd,T_Hg,T_As,T_Pb,T_Cr,T_Cu,T_Ni,T_Zn from jcd where OBJECTID_12 = 20";
DataTable dt = sqldb.GetTable(sql);

//设置标题和图表类型
Series series= new Series("重金属元素",ViewType.Bar);

//数据导入到series
for (int i = 0; i < dt.Columns.Count; i++)
{
SeriesPoint point = new SeriesPoint(dt.Columns[i].ToString(), Convert.ToDouble( Convert.ToDouble(dt.Rows[0][i].ToString()).ToString("0.00")));
series.Points.Add(point);
}
this.chartControl1.Series.Add(series);

this.chartControl1.Refresh();//刷新
//this.chartControl1.Show();