应用场景：

　　dataGridView需要某一个cell变成下拉框样式。

思路详解：

　　dataGridVie添加固定格式的row。

代码：

DataGridViewRow row = new DataGridViewRow();                    row.Cells.Add(new DataGridViewTextBoxCell());                    DataGridViewComboBoxCell comboxcell = new DataGridViewComboBoxCell();                                        comboxcell.Items.Add("九");                    comboxcell.Items.Add("平");                    comboxcell.Items.Add("气");                    comboxcell.Items.Add("阴");                    comboxcell.Items.Add("阳");                    comboxcell.Items.Add("痰");                    comboxcell.Items.Add("气");                    comboxcell.Items.Add("血");                    comboxcell.Items.Add("特");                    comboxcell.Items.Add("湿");                    row.Cells.Add(comboxcell);                    row.Cells.Add(new DataGridViewTextBoxCell());                    row.Cells.Add(new DataGridViewTextBoxCell());                    row.Cells.Add(new DataGridViewTextBoxCell());                    dataGridView_pinggu.Rows.Add(row);

下拉框事件代码：

private void dataGridView_pinggu_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)        {            DataGridView dgv = sender as DataGridView;            //判断相应的列            if (dgv.CurrentCell.GetType().Name == "DataGridViewComboBoxCell" && dgv.CurrentCell.RowIndex != -1)            {                //给这个DataGridViewComboBoxCell加上下拉事件                (e.Control as ComboBox).SelectedIndexChanged += new EventHandler(ComboBox_SelectedIndexChanged);            }        }        public void ComboBox_SelectedIndexChanged(object sender, EventArgs e)        {            ComboBox combox = sender as ComboBox;            //这里比较重要            combox.Leave += new EventHandler(combox_Leave);            try            {                //在这里就可以做值是否改变判断                if (combox.SelectedItem != null)                {                    Console.WriteLine(combox.SelectedItem.ToString());                    int manNum = ShuJuFenXiService.getNumBySexAndProjectID("0", tizhiDic[combox.SelectedItem.ToString()]);                    int famNum = ShuJuFenXiService.getNumBySexAndProjectID("1", tizhiDic[combox.SelectedItem.ToString()]);                    dataGridView_pinggu.Rows[1].Cells[1].Value = combox.SelectedItem.ToString();                    dataGridView_pinggu.Rows[1].Cells[2].Value = manNum + famNum;                    dataGridView_pinggu.Rows[1].Cells[3].Value = manNum;                    dataGridView_pinggu.Rows[1].Cells[4].Value = famNum;                    dataGridView_pinggu.Rows[1].Cells[5].Value = tizhiDic[combox.SelectedItem.ToString()];                }                Thread.Sleep(100);            }            catch (Exception ex)            {                MessageBox.Show(ex.Message);            }        }        public void combox_Leave(object sender, EventArgs e)        {            ComboBox combox = sender as ComboBox;            //做完处理，须撤销动态事件            combox.SelectedIndexChanged -= new EventHandler(ComboBox_SelectedIndexChanged);        }

 

难点：

　　1.注意dataGridView属性readOnly，设成false(界面模板设置))。要不然下拉框不显示。如果需要不可编辑，可以设定单元格的readOnly属性： dataGridView_pinggu.Rows[1].Cells[1].ReadOnly = true;

　　2.下拉框事件仅需给datagridview添加EditingControlShowing事件。