c# datagridview列形式為Combobox，每行下拉選項不一樣

c# datagridview列形式為Combobox，每行下拉選項不一樣

方法1

        /// <summary>
        /// 首先給這個DataGridView加上EditingControlShowing事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void dgvSelectFun_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
        {
            DataGridView dgv = sender as DataGridView;

            ////判斷相應的列
            if (dgv.CurrentCell.GetType().Name == "DataGridViewComboBoxCell" && dgv.CurrentCell.RowIndex != -1)
            {
                DataGridViewComboBoxCell combox = dgv.CurrentCell as DataGridViewComboBoxCell;
                combox.DataSource = FunsLib[dgv.CurrentCell.RowIndex].FuncSnALL; 
                //給這個DataGridViewComboBoxCell加上下拉事件
                (e.Control as ComboBox).SelectedIndexChanged += new EventHandler(ComboBox_SelectedIndexChanged);
            }
        }

        /// <summary>
        /// 組合框事件處理
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        public void ComboBox_SelectedIndexChanged(object sender, EventArgs e)
        {
            ComboBox combox = sender as ComboBox;

            //這里比較重要
            combox.Leave += new EventHandler(combox_Leave);
            try
            {
                //在這里就可以做值是否改變判斷
                if (combox.SelectedItem != null)
                {
                    
                }
                Thread.Sleep(100);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        /// <summary>
        /// 離開combox時，把事件刪除
        /// 這一步比較重要，如果不加，會導致selectedchanged事件一直觸發
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        public void combox_Leave(object sender, EventArgs e)
        {
            ComboBox combox = sender as ComboBox;
            //做完處理，須撤銷動態事件
            combox.SelectedIndexChanged -= new EventHandler(ComboBox_SelectedIndexChanged);
        }

 

方法2

        private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            DataGridView dgv = sender as DataGridView;

            //判斷相應的列
            if (dgv.CurrentCell.GetType().Name == "DataGridViewComboBoxCell" && dgv.CurrentCell.RowIndex != -1)
            {
                 //此處綁定數據源，或者直接清除下拉列表，重新添加
                DataGridViewComboBoxCell combox = dgv.CurrentCell as DataGridViewComboBoxCell;
                combox.DataSource = FunsLib[i].FuncSnALL;//FunsLib：List<List<string>>

                //combox.Items.Clear();
                //combox.Items.AddRange(new string[] { "A1.", "A2." });//此處需要判斷，根據對應行號，添加對應下拉列表，在此不再贅述
            }
        }