DevExpress的TreeList怎样设置数据源使其显示成单列树形结构

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

在上面已经实现DevExpress的安装之后，拖拽一个TreeList，然后怎样给其设置数据源。

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

参照上面进行设置数据源的过程。

如果要实现这样单列的树形结构应该怎样设置参数以及数据源。

注：

博客主页：
https://blog.csdn.net/badao_liumang_qizhi
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实现

首先新建一个Winform程序，然后拖拽一个TreeList控件

然后双击进入窗体的加载事件中，如果在别的地方设置数据源同理。

首先进行TreeList样式等的设置

#region 设置列头、节点指示器面板、表格线样式

            treeList1.OptionsView.ShowColumns = false;             //隐藏列标头
            treeList1.OptionsView.ShowIndicator = false;           //隐藏节点指示器面板
            treeList1.OptionsView.ShowHorzLines = false;           //隐藏水平表格线
            treeList1.OptionsView.ShowVertLines = false;           //隐藏垂直表格线
            treeList1.OptionsView.ShowIndentAsRowStyle = false;

            #endregion

            #region 初始禁用单元格选中，禁用整行选中

            treeList1.OptionsView.ShowFocusedFrame = true;                               //设置显示焦点框
            treeList1.OptionsSelection.EnableAppearanceFocusedCell = false;              //禁用单元格选中
            treeList1.OptionsSelection.EnableAppearanceFocusedRow = false;               //禁用正行选中

            #endregion

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

            treeList1.OptionsView.ShowButtons = true;                  //显示展开折叠按钮
            treeList1.LookAndFeel.UseDefaultLookAndFeel = false;       //禁用默认外观与感觉
            treeList1.LookAndFeel.UseWindowsXPTheme = true;            //使用WindowsXP主题
            treeList1.TreeLineStyle = DevExpress.XtraTreeList.LineStyle.Percent50;     //设置树线的样式

            #endregion

然后设置其单列显示

#region 添加单列

            DevExpress.XtraTreeList.Columns.TreeListColumn colNode = new DevExpress.XtraTreeList.Columns.TreeListColumn();
            colNode.Name = String.Format("col{0}", "NodeText");
            colNode.Caption = "NodeText";
            colNode.FieldName = "NodeText";
            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

            treeList1.Columns.Clear();
            treeList1.Columns.AddRange(new DevExpress.XtraTreeList.Columns.TreeListColumn[] { colNode });
            #endregion

注：

这里的FieldName 要与数据源中要显示的属性名相对应。

然后设置作为识别节点的主键字段，这里使用Id来区分标记每个节点；设置其父节点的标记属性。

treeList1.KeyFieldName = "Id";
treeList1.ParentFieldName = "ParentId";

为了构建数据源，我们需要新建一个DataTreeNode类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace TreeListTest
{
    public class DataTreeNode
    {
        private string id;
        private string parentId;
        private string nodeText;


        public string Id
        {
            get { return id; }
            set { id = value; }
        }

        public string ParentId
        {
            get { return parentId; }
            set { parentId = value; }
        }

        public string NodeText
        {
            get { return nodeText; }
            set { nodeText = value; }
        }


    }

}

然后再回到上面构建数据源

   DataTreeNode node1 = new DataTreeNode();
            node1.Id = "1";
            node1.ParentId = null;
            node1.NodeText = "1公众号";

            DataTreeNode node11 = new DataTreeNode();
            node11.Id = "2";
            node11.ParentId = "1";
            node11.NodeText = "1-1霸道的程序猿";

            DataTreeNode node111 = new DataTreeNode();
            node111.Id = "3";
            node111.ParentId = "2";
            node111.NodeText = "1-1-1大量编程资源";


            List<DataTreeNode> data = new List<DataTreeNode>();

            data.Add(node1);
            data.Add(node11);
            data.Add(node111);

然后给TreeList设置数据源

treeList1.DataSource = data;
treeList1.RefreshDataSource();

最终完整的窗体加载方法代码

private void Form1_Load(object sender, EventArgs e)
        {
            #region 设置列头、节点指示器面板、表格线样式

            treeList1.OptionsView.ShowColumns = false;             //隐藏列标头
            treeList1.OptionsView.ShowIndicator = false;           //隐藏节点指示器面板
            treeList1.OptionsView.ShowHorzLines = false;           //隐藏水平表格线
            treeList1.OptionsView.ShowVertLines = false;           //隐藏垂直表格线
            treeList1.OptionsView.ShowIndentAsRowStyle = false;

            #endregion

            #region 初始禁用单元格选中，禁用整行选中

            treeList1.OptionsView.ShowFocusedFrame = true;                               //设置显示焦点框
            treeList1.OptionsSelection.EnableAppearanceFocusedCell = false;              //禁用单元格选中
            treeList1.OptionsSelection.EnableAppearanceFocusedRow = false;               //禁用正行选中

            #endregion

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

            treeList1.OptionsView.ShowButtons = true;                  //显示展开折叠按钮
            treeList1.LookAndFeel.UseDefaultLookAndFeel = false;       //禁用默认外观与感觉
            treeList1.LookAndFeel.UseWindowsXPTheme = true;            //使用WindowsXP主题
            treeList1.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}", "NodeText");
            colNode.Caption = "NodeText";
            colNode.FieldName = "NodeText";
            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

            treeList1.Columns.Clear();
            treeList1.Columns.AddRange(new DevExpress.XtraTreeList.Columns.TreeListColumn[] { colNode });

            #endregion

            treeList1.KeyFieldName = "Id";
            treeList1.ParentFieldName = "ParentId";

            DataTreeNode node1 = new DataTreeNode();
            node1.Id = "1";
            node1.ParentId = null;
            node1.NodeText = "1公众号";

            DataTreeNode node11 = new DataTreeNode();
            node11.Id = "2";
            node11.ParentId = "1";
            node11.NodeText = "1-1霸道的程序猿";

            DataTreeNode node111 = new DataTreeNode();
            node111.Id = "3";
            node111.ParentId = "2";
            node111.NodeText = "1-1-1大量编程资源";


            List<DataTreeNode> data = new List<DataTreeNode>();

            data.Add(node1);
            data.Add(node11);
            data.Add(node111);
            
            treeList1.DataSource = data;
            treeList1.RefreshDataSource();
        }