在c＃中从foreach到for for for for dataGridView combobox列

Question

以下是我的代码，

 dataGridView1.DataSource = dt;
                    dataGridView1.AllowUserToAddRows = false;

                    foreach (DataGridViewRow row in dataGridView1.Rows)
                    {
                        DataGridViewComboBoxCell comboBoxCell = (row.Cells[1] as DataGridViewComboBoxCell);
                        foreach (DataRow drow in dt.Rows)
                        {
                            string customerId = drow[0].ToString();
                            comboBoxCell.Items.Add(drow[1]);

                            if (row.Cells[0].Value.ToString() == customerId)
                            {
                                comboBoxCell.Value = drow[1];
                            }
                        }
                    }

我想更改foreach循环以进行循环

，

  (dataGridView1.Columns[1] as DataGridViewComboBoxColumn).DataSource = dt;

            for (int i = 0; i <dataGridView1.Rows.Count; i++)
            {
               dataGridView1.Rows[i].Cells[1].Value = dt; 
            }

但并未显示我所需的结果 请提出任何建议 问候