DevExpress的TreeList实现节点上添加自定义右键菜单并实现删除节点功能

场景

winform控件-devexpress18下载安装注册以及在vs中使用：

https://blog.csdn.net/badao_liumang_qizhi/article/details/100061243

devexpress的treelist怎样设置数据源，从实例入手：

https://blog.csdn.net/badao_liumang_qizhi/article/details/102548490

实现了树形结构后，我们要实现在树形节点上点击右键时弹窗，弹窗确认之后实现将当前节点删除。

注：

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实现

这里在窗体加载完的事件里绑定treelist的鼠标点击事件。

this.treelist2.mouseclick += treelist2_mouseclick;

在事件方法中

private void treelist2_mouseclick(object sender, mouseeventargs e)
        {
            //获取当前treelist对象
            devexpress.xtratreelist.treelist treelist = sender as devexpress.xtratreelist.treelist;
            if (treelist != null && treelist.selection.count == 1)
            {
                object idvalue = null;
                string stridvalue = string.empty;
                datatreenode nodedata = null;
                //通过treelist的datasource属性获取所有节点的list
                list<datatreenode> datasource = treelist.datasource as list<datatreenode>;
                if (datasource != null)
                {
                    //获取选中节点的集合中第一个的id属性
                    idvalue = treelist.selection[0].getvalue("id");
                    stridvalue = idvalue.tostring();
                    //获取当前选中节点datatreenode对象
                    nodedata = datasource.where<datatreenode>(p => p.id == stridvalue).firstordefault<datatreenode>();
                    if (nodedata != null)
                    {
                        //获取或设置是否启用聚焦节点的外观设置 -启用整行选中
                            treelist.optionsselection.enableappearancefocusedrow = true;                                //启用整行选中

                            #region 右键弹出上下文菜单 - 删除待比较的文件
                            //如果点击的是鼠标右键
                            if (e.button == system.windows.forms.mousebuttons.right)
                            {
                                //构建右键菜单
                                system.windows.forms.contextmenu ctxmenu = new system.windows.forms.contextmenu();
                                //构建右键删除菜单项
                                system.windows.forms.menuitem mnudelete = new system.windows.forms.menuitem();
                                mnudelete.text = "删除当前文件";
                                //删除菜单项点击事件订阅
                                mnudelete.click += delegate(object s, eventargs ea)
                                {
                                    //devexpress的对话框
                                    dialogresult dialogresult = devexpress.xtraeditors.xtramessagebox.show(string.format("确定要删除此实验数据吗[{0}]？\r\n删除后无法恢复!", nodedata.id), "标题", system.windows.forms.messageboxbuttons.yesno, messageboxicon.question);
                                    //如果点击了yes
                                    if (dialogresult == dialogresult.yes)
                                    {
                                        try
                                        {
                                            string filename = string.empty;

                                            #region 删除对应的树节点
                                            //通过设置主键id找到节点node
                                            devexpress.xtratreelist.nodes.treelistnode selectednode = treelist.findnodebykeyid(nodedata.id);
                                            if (selectednode != null)
                                            {
                                                //删除节点
                                                this.treelist2.nodes.remove(selectednode);
                                            }
                                            #endregion
                                            //禁用整行选中
                                            treelist.optionsselection.enableappearancefocusedrow = false;                               
                                        }
                                        catch (exception ex)
                                        {
                                            icsharpcode.core.loggingservice<datatreelisthelper>.error("删除实验数据异常:" + ex.message, ex);
                                            devexpress.xtraeditors.xtramessagebox.show("删除实验数据异常:" + ex.message, "标题",messageboxbuttons.ok, messageboxicon.error);
                                        }
                                    }
                                };
                                ctxmenu.menuitems.add(mnudelete);
                                ctxmenu.show(treelist, new system.drawing.point(e.x, e.y));
                            }
                            #endregion
                            return;
                    }
                }
                treelist.optionsselection.enableappearancefocusedrow = false;                                //禁用整行选中
            }
        }

 

具体注释见代码。