DevExpress的TreeList的常用属性设置以及常用事件

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

在上面实现简单的treelist并设置数据源，显示效果仍然不是想要的树形结构的效果。

如果想实现如下这样效果，还需要进行进一步的属性设置。

 

 

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实现

   /// 为树控件设置数据源
        /// </summary>
        /// <param name="treelist">树控件</param>
        /// <param name="data">数据对象</param>
        /// <param name="fieldname">显示的字段</param>
        /// <param name="keyfieldname">键字段</param>
        /// <param name="parentfieldname">父级键字段</param>
        public static void settreelistdatasource(devexpress.xtratreelist.treelist treelist, list<datatreenode> data, string fieldname, string keyfieldname, string parentfieldname)
        {
            #region 设置节点图标

            system.windows.forms.imagelist imglist = new system.windows.forms.imagelist();
            imglist.images.addrange(imgs);

            treelist.selectimagelist = imglist;

            //目录展开
            treelist.afterexpand -= treelist_afterexpand;
            treelist.afterexpand += treelist_afterexpand;

            //目录折叠
            treelist.aftercollapse -= treelist_aftercollapse;
            treelist.aftercollapse += treelist_aftercollapse;

            //数据节点单击，开启整行选中
            treelist.mouseclick -= treelist_mouseclick;
            treelist.mouseclick += treelist_mouseclick;

            //数据节点双击选中
            treelist.mousedoubleclick -= treelist_mousedoubleclick;
            treelist.mousedoubleclick += treelist_mousedoubleclick;

            //焦点离开事件
            treelist.lostfocus -= treelist_lostfocus;
            treelist.lostfocus += treelist_lostfocus;


            #endregion

            #region 设置列头、节点指示器面板、表格线样式

            treelist.optionsview.showcolumns = false;             //隐藏列标头
            treelist.optionsview.showindicator = false;           //隐藏节点指示器面板

            treelist.optionsview.showhorzlines = false;           //隐藏水平表格线
            treelist.optionsview.showvertlines = false;           //隐藏垂直表格线
            treelist.optionsview.showindentasrowstyle = false;

            #endregion

            #region 初始禁用单元格选中，禁用整行选中

            treelist.optionsview.showfocusedframe = true;                               //设置显示焦点框
            treelist.optionsselection.enableappearancefocusedcell = false;              //禁用单元格选中
            treelist.optionsselection.enableappearancefocusedrow = false;               //禁用正行选中
            //treelist.appearance.focusedrow.backcolor = system.drawing.color.red;      //设置焦点行背景色

            #endregion

            #region 设置treelist的展开折叠按钮样式和树线样式

            treelist.optionsview.showbuttons = true;                  //显示展开折叠按钮
            treelist.lookandfeel.usedefaultlookandfeel = false;       //禁用默认外观与感觉
            treelist.lookandfeel.usewindowsxptheme = true;            //使用windowsxp主题
            treelist.treelinestyle = devexpress.xtratreelist.linestyle.percent50;     //设置树线的样式

            #endregion

            #region 添加单列

            devexpress.xtratreelist.columns.treelistcolumn colnode = new devexpress.xtratreelist.columns.treelistcolumn();
            colnode.name = string.format("col{0}", fieldname);
            colnode.caption = fieldname;
            colnode.fieldname = fieldname;
            colnode.visibleindex = 0;
            colnode.visible = true;

            colnode.optionscolumn.allowedit = false;                        //是否允许编辑
            colnode.optionscolumn.allowmove = false;                        //是否允许移动
            colnode.optionscolumn.allowmovetocustomizationform = false;     //是否允许移动至自定义窗体
            colnode.optionscolumn.allowsort = false;                        //是否允许排序
            colnode.optionscolumn.fixedwidth = false;                       //是否固定列宽
            colnode.optionscolumn.readonly = true;                          //是否只读
            colnode.optionscolumn.showincustomizationform = true;           //移除列后是否允许在自定义窗体中显示

            treelist.columns.clear();
            treelist.columns.addrange(new devexpress.xtratreelist.columns.treelistcolumn[] { colnode });

            #endregion

            #region 绑定数据源

            treelist.keyfieldname = keyfieldname;
            treelist.parentfieldname = parentfieldname;
            treelist.datasource = data;
            treelist.refreshdatasource();

            #endregion

            #region 初始化图标

            setnodeimageindex(treelist.nodes.firstordefault());

            #endregion
        }