Dev Express TreeList 控件常用方法小结

常用方法：

复选框的操作( 复选框选中状态改变时，改变相应的父节点和子节点的选中状态)
获取所有选中状态的数据的主键集合
一些常用的属性

1. 复选框的操作

显示复选框 ShowCheckBoxes属性设为True，有用到BeforeCheckNode和AfterCheckNode 事件

#region 复选框的操作
        private void treeNavigation_AfterCheckNode(object sender, NodeEventArgs e)
        {
            SetCheckedChildNodes(e.Node, e.Node.CheckState);
            SetCheckedParentNodes(e.Node, e.Node.CheckState);
        }
        private void treeNavigation_BeforeCheckNode(object sender, CheckNodeEventArgs e)
        {
            e.State = (e.PrevState == CheckState.Checked ? CheckState.Unchecked : CheckState.Checked);
        }

        /// <summary>
        /// 设置子节点的状态
        /// </summary> 
        private void SetCheckedChildNodes(DevExpress.XtraTreeList.Nodes.TreeListNode node, CheckState check)
        {
            for (int i = 0; i < node.Nodes.Count; i++)
            {
                node.Nodes[i].CheckState = check;
                SetCheckedChildNodes(node.Nodes[i], check);
            }
        }
        /// <summary>
        /// 设置父节点的状态
        /// </summary> 
        private void SetCheckedParentNodes(DevExpress.XtraTreeList.Nodes.TreeListNode node, CheckState check)
        {
            if (node.ParentNode != null)
            {
                bool b = false;
                CheckState state;
                for (int i = 0; i < node.ParentNode.Nodes.Count; i++)
                {
                    state = (CheckState)node.ParentNode.Nodes[i].CheckState;
                    if (!check.Equals(state))
                    {
                        b = !b;
                        break;
                    }
                }
                if (b)
                {
                    node.ParentNode.CheckState = CheckState.Indeterminate;
                }
                else
                {
                    node.ParentNode.CheckState = check;
                }
                SetCheckedParentNodes(node.ParentNode, check);
            }
        }
        #endregion

2 获取所有选中状态的数据的主键集合代码如下

 
private void barBtnSave_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
    if (treeNavigation.Nodes.Count > 0)
    {
        foreach (TreeListNode root in treeNavigation.Nodes)
        {
            GetCheckedAuthorizatioId(root);
        }
    }
    // AuthorizatioIdList 变量就是 选中状态的数据的主键集合 
}

        private List<string> AuthorizatioIdList = new List<string>();//所选择的权限的ID集合
        /// <summary>
        /// 获取选择状态的数据主键ID集合 
        /// </summary>
        /// <param name="parentNode">父级节点</param>
        private void GetCheckedAuthorizatioId(TreeListNode parentNode)
        {
            if (parentNode.Nodes.Count == 0)
            {
                return;//递归终止
            }
            foreach (TreeListNode node in parentNode.Nodes)
            {
                if (node.CheckState == CheckState.Checked)
                {
                    DataRowView drv = treeNavigation.GetDataRecordByNode(node) as DataRowView;
                    if (drv != null)
                    {
                        string nav_id = drv["nav_id"].ToString();
                        AuthorizatioIdList.Add(nav_id);
                    }
                }
                GetCheckedAuthorizatioId(node);
            }
        }

3 一些常用的属性

//treeNavigation.OptionsView.AutoWidth = false; //禁用自动宽度
//treeNavigation.Columns["stateName"].Width = 180; //设置指定列宽
//treeNavigation.BorderStyle = DevExpress.XtraEditors.Controls.BorderStyles.NoBorder;
//默认显示下拉三角形样式，设置TreeList的两个皮肤属性即可变成连接虚线
treeNavigation.LookAndFeel.UseDefaultLookAndFeel = false;
treeNavigation.LookAndFeel.UseWindowsXPTheme = true;

treeNavigation.OptionsView.ShowHorzLines = false; //是否显示水平线。默认为True； 
treeNavigation.OptionsView.ShowVertLines = true; //是否显示垂直线。默认为True； 
treeNavigation.OptionsView.ShowIndicator = false; //是否显示Node的指示符面板，就是最左边有个三角箭头。默认为True；
treeNavigation.OptionsView.ShowButtons = true; //是否显示展开与收缩按钮。默认为True；
treeNavigation.OptionsView.ShowColumns = false; //是否显示列标题。默认为True；
treeNavigation.OptionsView.ShowIndentAsRowStyle = false; //是否用相应Node的Appearance设置来生成Tree的缩进（没看懂）。默认为False
treeNavigation.OptionsView.FocusRectStyle = DevExpress.XtraTreeList.DrawFocusRectStyle.None; //在获得焦点的Cell上，是否显示焦点框架。默认为True；

//treeNavigation.OptionsView.FocusRectStyle = DrawFocusRectStyle.CellFocus;
treeNavigation.OptionsView.ShowRoot = true; //是否在根Node间显示连接线。默认为True；
treeNavigation.OptionsView.ShowCheckBoxes = false; //显示勾选框。默认为False
treeNavigation.OptionsDragAndDrop.DragNodesMode = DragNodesMode.None;//拖拽节点
treeNavigation.OptionsBehavior.ReadOnly = true; //只读
treeNavigation.OptionsBehavior.Editable = false; //不可编辑
treeNavigation.OptionsBehavior.AllowIndeterminateCheckState = true; //设置节点是否有中间状态，即一部分子节点选中，一部分子节点没有选中
treeNavigation.OptionsSelection.InvertSelection = true; //选中风格是只应用于选中的Cell
treeNavigation.OptionsSelection.MultiSelect = false; //允许多选 
treeNavigation.OptionsSelection.EnableAppearanceFocusedCell = true; //选中的Cell的Appearance设置是否可用 
treeNavigation.ExpandAll(); //展开所有层级 
// treeNavigation.ExpandToLevel(0); //展开的层级

////注册这两个事件实现选择父节点自动选子节点，反之亦然 
//treeNavigation.BeforeCheckNode += treeNavigation_BeforeCheckNode; 
//treeNavigation.AfterCheckNode += treeNavigation_AfterCheckNode;
//treeNavigation.AfterFocusNode += treeNavigation_AfterFocusNode;
//treeNavigation.DoubleClick += treeNavigation_DoubleClick; //但要注意的是要在TreeList.OptionsBehavior.Editable = false的情况下，双击Node才能触发该事件

////设置图片 
//// treeNavigation.CustomDrawNodeImages += treeNavigation_CustomDrawNodeImages;

//// 颜色设置 
////  treeNavigation.Appearance.Row.BackColor = Color.Transparent;//节点默认背景色 
////  treeNavigation.Appearance.FocusedRow.BackColor = Color.Orange; // 选中节点的背景色 
////  treeNavigation.Appearance.HideSelectionRow.BackColor = Color.LightYellow;//选中节点失去焦点时的背景色

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Dev Express TreeList 控件 常用方法小结

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