Winforn中DevExpress的TreeList中显示某路径下的所有目录和文件（附源码下载）

素颜马尾好姑娘i 2024-04-17 06:22 56阅读 0赞

## 场景 ##

Winform中DevExpress的TreeList的入门使用教程（附源码下载）：

[https://blog.csdn.net/BADAO\_LIUMANG\_QIZHI/article/details/100075677][https_blog.csdn.net_BADAO_LIUMANG_QIZHI_article_details_100075677]

[https://www.cnblogs.com/badaoliumangqizhi/p/11412053.html][https_www.cnblogs.com_badaoliumangqizhi_p_11412053.html]

在上面实现给TreeList赋值的基础上，将其数据源更改为本地某路径下的所有文件和目录。

### 效果 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70][]

###  ###

## 实现 ##

在原来的节点类中添加节点类型属性，该属性是枚举类型。

using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    
    namespace DevExpressSimple
    {
        class TreeNode
        {
            //标识Id
            private string id;
            //父级节点ID
            private string parentId;
            //节点显示文本
            private string nodeText;
            private TreeNodeTypes nodeType = TreeNodeTypes.Folder;
    
            public TreeNodeTypes NodeType
            {
                get { return nodeType; }
                set { nodeType = value; }
            }
    
            public string NodeText
            {
                get { return nodeText; }
                set { nodeText = value; }
            }
            public string ParentId
            {
                get { return parentId; }
                set { parentId = value; }
            }
          
            public string Id
            {
                get { return id; }
                set { id = value; }
            }
        }
    }

然后新建枚举类TreeNodeType

using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    
    namespace DevExpressSimple
    {
        public enum TreeNodeTypes
        {
            /// <summary>
            /// 文件夹
            /// </summary>
            Folder = 0,
            /// <summary>
            /// 文件
            /// </summary>
            File = 1
        }
    }

然后新建工具类TreeListHelper，用来将目录转换成节点对象并添加到数据源。

using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    
    namespace DevExpressSimple
    {
        class TreeListHelper
        {
            public static List<TreeNode> ParseDir(string dataRootDir, List<TreeNode> data)
            {
                //如果传递的list为空，则新建一个
                if (data == null)
                {
                    data = new List<TreeNode>();
                }
                //如果目录不存在则直接原样将data返回
                if (!System.IO.Directory.Exists(dataRootDir))
                {
                    return data;
                }
               
                TreeNode node = null;
                //创建目录对象
                System.IO.DirectoryInfo dir = new System.IO.DirectoryInfo(dataRootDir);
                //使用数组接收目录下的所有目录
                System.IO.DirectoryInfo[] subDirs = dir.GetDirectories();
                //循环每个目录
                foreach (System.IO.DirectoryInfo subDir in subDirs)
                {
                    //新建节点对象
                    node = new TreeNode();
                    //节点的Id取当前目录的名字
                    node.Id = subDir.Name;
                    //节点的父级ID 取上层目录的名字
                    node.ParentId = dir.Name;
                    //节点要显示的文本也取当前目录的名字
                    node.NodeText = subDir.Name;
                    //节点类型为文件夹
                    node.NodeType = TreeNodeTypes.Folder;
                    //将当前节点添加到list数据源
                    data.Add(node);
                    //因为是文件夹，所以需要迭代当前方法 并将当前目录作为参数重新传递 直到迭代完所有文件夹
                    //这里使用FullName方法  获取全路径
                    ParseDir(subDir.FullName, data);
                }
                //遍历完文件夹之后 遍历 文件
                //使用FileInfo的GetGiles方法 获取所有文件
                System.IO.FileInfo[] subFiles = dir.GetFiles();
                //遍历所有文件
                foreach (System.IO.FileInfo subFile in subFiles)
                {
                    node = new TreeNode();
                    node.Id = subFile.Name;
                    node.ParentId = dir.Name;
                    node.NodeText = subFile.Name;
                    node.NodeType = TreeNodeTypes.File;
                    data.Add(node);
                }
                //返回数据源
                return data;
            }
        }
    }

再回到原来窗体加载的代码中设置数据源list的地方。

//新建list数据源
                List<TreeNode> data = new List<TreeNode>();
                //data.Add(new TreeNode() { Id = "root", ParentId = String.Empty, NodeText = "测试1" });
                // data.Add(new TreeNode() { Id = "first", ParentId = "root", NodeText = "测试2" });
                //将指定目录下的所有文件以及文件夹封装成节点对象并添加到list
                data = TreeListHelper.ParseDir(@"E:\test", data);
                //添加根节点 Id属性对应根目录的名字， 父级Id为空  节点显示的文本 为 “所有文本”  节点类型为 文件夹
                data.Add(new TreeNode() { Id = "test", ParentId = String.Empty, NodeText = "所有文件", NodeType = TreeNodeTypes.Folder });

完整示例代码

using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Linq;
    using System.Text;
    using System.Threading.Tasks;
    using System.Windows.Forms;
    
    namespace DevExpressSimple
    {
        public partial class Form1 : Form
        {
            public Form1()
            {
                InitializeComponent();
            }
    
            private void Form1_Load(object sender, EventArgs e)
            {
             
                string keyFieldName = "Id";
                string parentFieldName = "ParentId";
                //新建list数据源
                List<TreeNode> data = new List<TreeNode>();
                //data.Add(new TreeNode() { Id = "root", ParentId = String.Empty, NodeText = "测试1" });
                // data.Add(new TreeNode() { Id = "first", ParentId = "root", NodeText = "测试2" });
                //将指定目录下的所有文件以及文件夹封装成节点对象并添加到list
                data = TreeListHelper.ParseDir(@"E:\test", data);
                //添加根节点 Id属性对应根目录的名字， 父级Id为空  节点显示的文本 为 “所有文本”  节点类型为 文件夹
                data.Add(new TreeNode() { Id = "test", ParentId = String.Empty, NodeText = "所有文件", NodeType = TreeNodeTypes.Folder });
                //添加单列
                DevExpress.XtraTreeList.Columns.TreeListColumn colNode = new DevExpress.XtraTreeList.Columns.TreeListColumn();
                //设置名字
                colNode.Name = "名字";
                //设置标题
                colNode.Caption = "标题";
                //设置从数据源分配给当前列的字段名。
                colNode.FieldName = "NodeText";
                //设置树列表中显示当前列的位置。
                colNode.VisibleIndex = 0;
                //是否可见
                colNode.Visible = true;
                //是否允许编辑
                colNode.OptionsColumn.AllowEdit = false;
                //是否允许移动   
                colNode.OptionsColumn.AllowMove = false;
                //是否允许移动至自定义窗体    
                colNode.OptionsColumn.AllowMoveToCustomizationForm = false;
                //是否允许排序
                colNode.OptionsColumn.AllowSort = false;
                //是否固定列宽        
                colNode.OptionsColumn.FixedWidth = false;
                //是否只读        
                colNode.OptionsColumn.ReadOnly = true;
                //移除列后是否允许在自定义窗体中显示
                colNode.OptionsColumn.ShowInCustomizationForm = true;          
                //先清除列
                this.treeList1.Columns.Clear();
                //将列数组添加到集合的结尾。
                this.treeList1.Columns.AddRange(new DevExpress.XtraTreeList.Columns.TreeListColumn[] { colNode });
                this.treeList1.OptionsView.ShowColumns = false;             //隐藏列标头
                this.treeList1.OptionsView.ShowIndicator = false;           //隐藏节点指示器面板
    
                this.treeList1.OptionsView.ShowHorzLines = false;           //隐藏水平表格线
                this.treeList1.OptionsView.ShowVertLines = false;           //隐藏垂直表格线
                this.treeList1.OptionsView.ShowIndentAsRowStyle = false;
                #region 绑定数据源
                //设置属性KeyFieldName  ParentFieldName
                //设置一个值，该值指定绑定到XtratreeList控件的数据源的键字段
                this.treeList1.KeyFieldName = keyFieldName;
                //设置一个值，该值表示标识此数据源中父记录的数据源字段。
                this.treeList1.ParentFieldName = parentFieldName;
                this.treeList1.DataSource = data;
                //刷新数据
                this.treeList1.RefreshDataSource();
    
                #endregion
             
            }
        }
    }

这里指定的目录是E盘下的test目录，在test下新建一些目录和文件。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 1][]

## 示例源码下载 ##

[https://download.csdn.net/download/badao\_liumang\_qizhi/11614756][https_download.csdn.net_download_badao_liumang_qizhi_11614756]

[https_blog.csdn.net_BADAO_LIUMANG_QIZHI_article_details_100075677]: https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/100075677
[https_www.cnblogs.com_badaoliumangqizhi_p_11412053.html]: https://www.cnblogs.com/badaoliumangqizhi/p/11412053.html
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/16/d3fe25479f8a4ed183b76d9b24297504.jpg
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70 1]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/16/8e67937da9f54bfa8715d5e013a1526a.jpg
[https_download.csdn.net_download_badao_liumang_qizhi_11614756]: https://download.csdn.net/download/badao_liumang_qizhi/11614756