場景

滑鼠點擊DataGridView的某個單元格時，此單元格添加一個自定義的控制項，這裡以

添加下拉框為例

效果

註：

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https://blog.csdn.net/badao_liumang_qizhi
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實現

在設計器頁面，找到DataGridView的單元格點擊事件CellClick,然後雙擊進入其點擊事件中

private void dataGridView_Task_ViewEdit_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            //獲取當前點擊的列的index
            int currentColumnindex = dataGridView_Task_ViewEdit.CurrentCell.ColumnIndex;
            //獲取當前行的index
            int currentRowindex = dataGridView_Task_ViewEdit.CurrentCell.RowIndex;
            switch (currentColumnindex)
            {
                case 2:
                    //第三列-控制模式
                    Cell2Click(currentColumnindex,currentRowindex);
                    break;
                case 3:
                    //第四列-跳轉條件
                    break;
                case 4:
                    //第五列-記錄條件
                    break;
                case 5:
                    //第六列-電流量程
                    break;
                default:
                    break;
            }
        }

然後在通過當前列的Index判斷是那一列，再執行具體的操作，添加不同的控制項。

這裡操作第三列，然後執行方法Cell2Click，並將當前行與列的index傳遞。

private void Cell2Click(int currentColumnindex, int currentRowindex)
        {
            //下拉框控制項
            DevExpress.XtraEditors.ComboBoxEdit comboBox = new DevExpress.XtraEditors.ComboBoxEdit();  //添加ComboBox
            comboBox.Name = "ControlModel_ComBox";
            ComboBoxItemCollection coll = comboBox.Properties.Items;
            //添加
            this.dataGridView_Task_ViewEdit.Controls.Add(comboBox);
            //獲取當前單元格的內容
            string currentCellValue = this.dataGridView_Task_ViewEdit.Rows[currentRowindex].Cells[currentColumnindex].Value.ToString();
            //清空單元格內容
            this.dataGridView_Task_ViewEdit.Rows[currentRowindex].Cells[currentColumnindex].Value = String.Empty;
            //獲取大小
            Rectangle rect = dataGridView_Task_ViewEdit.GetCellDisplayRectangle(currentColumnindex, currentRowindex, true);
            //大小設置
            comboBox.Size = new Size((rect.Width / 3), rect.Height);
            //位置設置
            comboBox.Location = new Point(rect.Left, rect.Top);
            
            //根據配置文件獲取下拉框items選項
            int i=0;
            List<ControlModelItem> controlModelItems = TaskViewEditHelper.GetComboBoxItems(System.IO.Path.Combine(Global.AppConfig.SysConfigPath, Global.CONTROL_MODEL_ITEMS_FILE_PATH));
            foreach(ControlModelItem controlModelItem in controlModelItems)
            {
                coll.Add(controlModelItem);
                if (controlModelItem.Value == currentCellValue)
                    comboBox.SelectedIndex = i;
                i++;
            }
            //通過下麵可以獲取選中項的內容
            ////if (comboBox.SelectedItem != null) 
            ////{
            ////    string key = (comboBox.SelectedItem as ControlModelItem).Key;
            ////    string value = (comboBox.SelectedItem as ControlModelItem).Value;
            ////}
            
            //綁定事件--控制模式下拉框選項改變
            comboBox.SelectedValueChanged += comboBox_SelectedValueChanged;
        }

這裡是添加了一個DevExpress的下拉框控制項ComboBoxEdit控制項，並添加下拉框選項，然後綁定下拉框內容改變的事件comboBox_SelectedValueChanged。

同理在改變下拉框選項的事件中在分別實現添加控制項

private void comboBox_SelectedValueChanged(object sender, EventArgs e)
        {
            int controlCount = this.dataGridView_Task_ViewEdit.Controls.Count;
            //初始化會有三個控制項
            if (controlCount>3)
            {
                for (int i = 3; i < controlCount; i++)
                {
                    //刪除第三個之後的控制項，刪除後索引減1 所以迴圈刪除第四個控制項
                    this.dataGridView_Task_ViewEdit.Controls.RemoveAt(3);
                }
            }
            DevExpress.XtraEditors.ComboBoxEdit comboBox = sender as ComboBoxEdit;
            ControlModelItem controlModelItem = comboBox.SelectedItem as ControlModelItem;
            string controlModelItemkey = controlModelItem.Key;
            switch (controlModelItemkey)
            {
                //恆壓
                case "ConstantVoltage":
                    int currentColumnindex = dataGridView_Task_ViewEdit.CurrentCell.ColumnIndex;
                    int currentRowindex = dataGridView_Task_ViewEdit.CurrentCell.RowIndex;

                    TextEdit textEdit = new TextEdit();
                    textEdit.Name = "ControlMode_ConstantVoltage_textEdit";
                    this.dataGridView_Task_ViewEdit.Controls.Add(textEdit);
                    
                    //獲取大小
                    Rectangle rect = dataGridView_Task_ViewEdit.GetCellDisplayRectangle(currentColumnindex, currentRowindex, true);
                    //大小設置
                    textEdit.Size = new Size((rect.Width / 6) + Global.CONTROL_DISTANCE, rect.Height);
                    //位置設置
                    textEdit.Location = new Point(rect.Left + (rect.Width / 3), rect.Top);

                    LabelControl label = new LabelControl();
                    label.Name = "ControlMode_ConstantVoltage_label";
                    this.dataGridView_Task_ViewEdit.Controls.Add(label);
                    label.Text = "V";
                    //位置設置
                    label.Location = new Point(rect.Left + (rect.Width / 3) + (rect.Width / 6) + Global.CONTROL_DISTANCE * 2, rect.Top + Global.LABEL_FROM_TOP_DISTANCE);
                    break;
                case "Shelve":
                    break;
                case "ConstantCurrent":
                    break;
                case "ConstantPower":
                    break;
                case "ConstantLoad":
                    break;
                case "Cycle":
                    break;
                case "CurrentSlope":
                    break;
                case "CurrentLadder":
                    break;
                case "ConstantVoltageLimitCurrent":
                    break;
                case "CurrentPulse":
                    break;
                case "WorkingConditionSimulation":
                    break;
                case "PowerRamp":
                    break;
                case "PowerLadder":
                    break;
                default:
                    break;
            }
        }