视频：https://www.bilibili.com/video/bv15x411x7wn?p=7
chartcontrol图表控件的运用。
选择一种图表类型，先不考虑各种图表的叠加。
绑定数据，设置横坐标和纵坐标。
private void xtraform1_load(object sender, eventargs e)
{
series series = this.chartcontrol1.series[0];
datatable table = new datatable();
table.columns.add("class");
table.columns.add("totalgrade",typeof(double));
var row = table.newrow();
row["class"] = "一班";
row["totalgrade"] = 5190;
table.rows.add(row);
var row1 = table.newrow();
row1["class"] = "二班";
row1["totalgrade"] = 3776;
table.rows.add(row1);
series.datasource = table;
// 设置横坐标
series.argumentdatamember = "class";
// 设置纵坐标
series.valuedatamembers[0] = "totalgrade";
}
