private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
        {
            if (sender != null)
            {
                if(((DataGridView)sender).SelectedCells[0].ColumnIndex==0) //编辑的是第0列
                {
                 //设置第一列的数据源
                 //((ComboBox)e.Control).DataSource = ds.Tables[0];
                    //((ComboBox)e.Control).DisplayMember = "Display";
                    //((ComboBox)e.Control).ValueMember = "Value";
                    ////当DataGridView中的ComboBox值变化时，生成如下事件
                   ((ComboBox)e.Control).SelectedIndexChanged += new EventHandler(DataGridViewCombox_SelectedIndexChanged);
                }
                    
             }
        }
/// <summary>
        /// ////当DataGridView中的ComboBox值变化时触发如下事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void DataGridViewCombox_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (sender != null&&dataGridView1.SelectedCells[0].ColumnIndex==0)//确定发生值变化的是第0列。可根据实际情况调整。
            {
                
                
                int rowIndex =dataGridView1.SelectedCells[0].RowIndex;
                //获取第rowIndex行，第1列的Cell
                DataGridViewComboBoxCell dgvcbc=(DataGridViewComboBoxCell) dataGridView1.Rows[rowIndex].Cells[1];
                
                dgvcbc.Items.Clear();//清空DataGridViewComboxCell
                ///////////////////往里填充新的数值。
                for (int i = 0; i < 10; i++)
                {
                    dgvcbc.Items.Add(((ComboBox)sender).SelectedItem.ToString() + i.ToString());
                }
                
            }
        }