winform 外键绑定 对象

Question

this.dataGridView1.DataSource = DAL.PlanService.getAllplan(); 主表
//外表 下面
List wk = DAL.WeekService.GetListWeek();
List ws = DAL.WeekService.GetWeekById(id);

this.dataGridView1.Rows[0].Cells["外表"].Value = wk[0].weekname.ToString();
这是 第一行 显示所有行 怎么办

Answer 1

foreach (var w in ws)
this.dataGridView1.Rows[0].Cells["外表"].Value += w.weekname.ToString();