在DataGridView中动态添加combox列

DataGridViewComboBoxColumn dCombo = new DataGridViewComboBoxColumn();
dCombo.Name = "dCombo";
//该列显示的位置
dCombo.DisplayIndex = 4;
dCombo.HeaderText = "class";
想绑定sql数据库中banji表，列为class中的相关数据，不知道接下来该怎么写。。。

dCombo.DataSource = 数据源;
dataGridView1.Columns.Insert(0, dCombo); //把combobox添加到第一列

system.windows.forms.datagridviewcomboboxcolumn list = new datagridviewcomboboxcolumn(); list.displayindex = 0; list.headertext = "类型"; list.datapropertyname = "类型"; list.datasource = this.dataset.tables[0]; list.displaymember = "type"; list.valuemember = "id"; datagridview1.columns.add(list);