DevExpress的TreeList怎样设置数据源使其显示成单列树形结构

绝地灬酷狼 2023-10-11 00:46 34阅读 0赞

## 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][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][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。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70][]

注：

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[https://blog.csdn.net/badao\_liumang\_qizhi][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

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 1][]

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();
            }

[https_blog.csdn.net_BADAO_LIUMANG_QIZHI_article_details_100061243]: https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/100061243
[https_blog.csdn.net_BADAO_LIUMANG_QIZHI_article_details_102548490]: https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/102548490
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20191025142733142.jpg?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk=,size_16,color_FFFFFF,t_70
[https_blog.csdn.net_badao_liumang_qizhi]: https://blog.csdn.net/badao_liumang_qizhi
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20191025142738321.jpg?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk=,size_16,color_FFFFFF,t_70