场景

鼠标点击datagridview的某个单元格时，此单元格添加一个自定义的控件，这里以

添加下拉框为例

效果

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实现

在设计器页面，找到datagridview的单元格点击事件cellclick,然后双击进入其点击事件中

private void datagridview_task_viewedit_cellclick(object sender, datagridviewcelleventargs e)
        {
            //获取当前点击的列的index
            int currentcolumnindex = datagridview_task_viewedit.currentcell.columnindex;
            //获取当前行的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-跳转条件
                    break;
                case 4:
                    //第五列-记录条件
                    break;
                case 5:
                    //第六列-电流量程
                    break;
                default:
                    break;
            }
        }

然后在通过当前列的index判断是那一列，再执行具体的操作，添加不同的控件。

这里操作第三列，然后执行方法cell2click，并将当前行与列的index传递。

private void cell2click(int currentcolumnindex, int currentrowindex)
        {
            //下拉框控件
            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);
            //获取当前单元格的内容
            string currentcellvalue = this.datagridview_task_viewedit.rows[currentrowindex].cells[currentcolumnindex].value.tostring();
            //清空单元格内容
            this.datagridview_task_viewedit.rows[currentrowindex].cells[currentcolumnindex].value = string.empty;
            //获取大小
            rectangle rect = datagridview_task_viewedit.getcelldisplayrectangle(currentcolumnindex, currentrowindex, true);
            //大小设置
            combobox.size = new size((rect.width / 3), rect.height);
            //位置设置
            combobox.location = new point(rect.left, rect.top);
            
            //根据配置文件获取下拉框items选项
            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++;
            }
            //通过下面可以获取选中项的内容
            ////if (combobox.selecteditem != null) 
            ////{
            ////    string key = (combobox.selecteditem as controlmodelitem).key;
            ////    string value = (combobox.selecteditem as controlmodelitem).value;
            ////}
            
            //绑定事件--控制模式下拉框选项改变
            combobox.selectedvaluechanged += combobox_selectedvaluechanged;
        }

这里是添加了一个devexpress的下拉框控件comboboxedit控件，并添加下拉框选项，然后绑定下拉框内容改变的事件combobox_selectedvaluechanged。

同理在改变下拉框选项的事件中在分别实现添加控件

private void combobox_selectedvaluechanged(object sender, eventargs e)
        {
            int controlcount = this.datagridview_task_viewedit.controls.count;
            //初始化会有三个控件
            if (controlcount>3)
            {
                for (int i = 3; i < controlcount; i++)
                {
                    //删除第三个之后的控件，删除后索引减1 所以循环删除第四个控件
                    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)
            {
                //恒压
                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);
                    
                    //获取大小
                    rectangle rect = datagridview_task_viewedit.getcelldisplayrectangle(currentcolumnindex, currentrowindex, true);
                    //大小设置
                    textedit.size = new size((rect.width / 6) + global.control_distance, rect.height);
                    //位置设置
                    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";
                    //位置设置
                    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;
            }
        }