DotNetBar中Supergrid显示树形数据

1.向窗体中拖一个Supergrid控件

2.添加列ID，NAME，MATH，CN，SEX

3.在任务窗格中勾选“Show Tree Lines”和“Show Tree Buttons”

4.添加数据，通过点击窗体按钮来实现：

        private Random _Rand = new Random();

        private void btnxAddRows_Click(object sender, EventArgs e)
        {
            GridPanel panel = superGridControl1.PrimaryGrid;
            for(int i=0;i<100;i++)
            {
                GridRow row = GetNewRow(i);
                int subrows = _Rand.Next(9);
                for (int j = 0; j < subrows; j++)
                    row.Rows.Add(GetNewRow(i * 10 + j));
                panel.Rows.Add(row);
            }
        }

        private GridRow GetNewRow(int id)
        {
            return new GridRow(
                id,
                $"STU{id}",
                _Rand.NextDouble() * 100,
                _Rand.NextDouble() * 100, 
                _Rand.Next() % 2 == 0);
        }

5.效果：