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//DataGridViewComboBoxColumn cmbox = dataGridView1.Columns["TYPE"] as DataGridViewComboBoxColumn;
DataGridViewComboBoxColumn cmbox = new DataGridViewComboBoxColumn();
cmbox.DataSource = dtList;
cmbox.DataPropertyName = "TYPE";
cmbox.DisplayMember = "NAME";
cmbox.ValueMember = "ID";
dataGridView1.Columns.Add(cmbox);
dataGridView1.DataSource = dtSource;
comboBox1.DataSource = "绑定数据";
comboBox1.DisplayMember = "name";//comboBox1中要添加的数据,对应数据库的字段
comboBox1.ValueMember = "id"; //数据对应的数据库的id号
int i = comboBox1.SelectedValue; //这是你要删除,修改是数据的id