使用扩展函数方式,在Winform界面中快捷的绑定树形列表TreeList控件和TreeListLookUpEdit控件

        /// <summary>
        /// 绑定树的数据源
        /// </summary>
        private async void BindTree(
        {
            var list = await BLLFactory<IDictTypeService>.Instance.GetAllAsync(;
            this.tree.DataSource = list?.Items;
            this.tree.ExpandAll(;
        }

//使用原生代码处理 //添加显示列 this.tree.Columns.Add(new TreeListColumn{ FieldName= "Id", Caption= "ID"};//增加一个隐藏的字段，存储需要的ID this.tree.Columns.Add(new TreeListColumn{ FieldName= "Name", Caption= "字典类型名称", Width=160, VisibleIndex =0}; //设置树控件的层次关系及属性 tree.KeyFieldName = "Id"; tree.ParentFieldName = "PID"; this.tree.OptionsBehavior.Editable = false; this.tree.OptionsView.ShowColumns = false; this.tree.OptionsView.ShowCheckBoxes = false; this.tree.OptionsView.EnableAppearanceOddRow = true; this.tree.OptionsView.EnableAppearanceEvenRow = true;

/// <summary> /// 实现树节点的过滤查询 /// </summary> private void InitSearchControl( { this.searchControl1.Client = this.tree; this.tree.FilterNode += (object sender, FilterNodeEventArgs e => { if (tree.DataSource == null return; string nodeText = e.Node.GetDisplayText("Name";//参数填写FieldName if (string.IsNullOrWhiteSpace(nodeText return; bool isExist = nodeText.IndexOf(searchControl1.Text, StringComparison.OrdinalIgnoreCase >= 0; if (isExist { var node = e.Node.ParentNode; while (node != null { if (!node.Visible { node.Visible = true; node = node.ParentNode; } else break; } } e.Node.Visible = isExist; e.Handled = true; }; }

  //控件扩展函数封装处理
  this.tree.CreateColumn("Name", "字典类型名称", 160, true;
  this.tree.InitTree("Id", "PID", "-1", false, false;
  this.tree.InitSearchControl(this.searchControl1, "Name";

/// <summary> /// TreeList控件的扩展函数 /// </summary> public static class TreeList_Extension

/// <summary>
/// 初始化TreeList控件,展现嵌套的列表。
/// </summary>
private void InitControl(
{
    this.tree.Columns.Clear(;//控件扩展函数封装处理
    this.tree.CreateColumn("Name", "机构名称", 160, true;
    this.tree.CreateColumn("HandNo", "机构编码", 80, true;
    this.tree.CreateColumn("Category", "机构分类", 80, true;
    this.tree.CreateColumn("Address", "机构地址", 160, true;
    this.tree.CreateColumn("InnerPhone", "内线电话", 80, true;
    this.tree.CreateColumn("OuterPhone", "外线电话", 80, true;
    this.tree.CreateColumn("SortCode", "排序码", 80, true;
    this.tree.InitTree("Id", "PID", null, true, true;

    this.tree.OptionsView.RowImagesShowMode = RowImagesShowMode.InCell;//紧凑型图标
    this.tree.ExpandAll(;

    // 列过滤处理            
    this.tree.OptionsView.ShowAutoFilterRow = true;//显示过滤行            
    this.tree.OptionsBehavior.EnableFiltering = true;//开启过滤功能

    //初始化树节点选择事件
    this.tree.FocusedNodeChanged += delegate (object sender, FocusedNodeChangedEventArgs e
    {
        this.FocusedNodeChanged(;
    };
    //树节点双击处理事件
    this.tree.DoubleClick += (s, e =>
    {
        if (this.tree.FocusedNode != null
        {
            string ID = string.Concat(this.tree.FocusedNode.GetValue("Id";
            MessageDxUtil.ShowTips("Id=" + ID;
        }
    };
    //编辑记录失去焦点后校验处理
    this.tree.ValidateNode += (s, e =>
    {
        Console.WriteLine(this.tree.FocusedNode.GetValue("Name";
    };
}

//TreeListLookupEdit数据绑定 //this.txtProjectList3.Properties.TreeList.OptionsView.ShowCheckBoxes = true; this.txtProjectList3.Properties.DataSource = list; this.txtProjectList3.Properties.ValueMember = "Value"; this.txtProjectList3.Properties.DisplayMember = "Text"; this.txtProjectList3.Properties.TreeList.Columns.Clear(; for (int i = 0; i < columns.Count; i++ { this.txtProjectList3.Properties.TreeList.CreateColumn(columns[i].FieldName, columns[i].Caption, columns[i].Width, true; } this.txtProjectList3.Properties.TreeList.InitTree(null, null, null, true, true; this.txtProjectList3.Properties.ImmediatePopup = true; this.txtProjectList3.Properties.TextEditStyle = TextEditStyles.Standard; this.txtProjectList3.Properties.PopupWidthMode = DevExpress.XtraEditors.PopupWidthMode.ContentWidth; this.txtProjectList3.Properties.PopupFormSize = new System.Drawing.Size(this.txtProjectList3.Width, 300; this.txtProjectList3.Properties.TreeList.IndicatorWidth = 40; this.txtProjectList3.Properties.TreeList.CustomDrawNodeIndicator += (s, ee => { if (ee.IsNodeIndicator { var index = ee.Node.TreeList.GetVisibleIndexByNode(ee.Node; ee.Info.DisplayText = (index + 1.ToString(; } };

//常规类别绑定 this.txtProjectList4.BindDictItems(list, "Text", "Value", true, columns.ToArray(;

var dictTypeColumns = new List<LookUpColumnInfo>(
{
    new LookUpColumnInfo("Id", "Id",
    new LookUpColumnInfo("Name", "字典类别名称"
};
treeListLookUp.BindDictItems(result.Items, "Name", "Id", true, false, "Id", "PID", null, true, true, true, false, dictTypeColumns.ToArray(;

       /// <summary>
        /// 绑定TreeListLookUpEdit控件的数据源(完整版）
        /// </summary>
        /// <param name="lookup">控件对象</param>
        /// <param name="dataSource">数据源</param>
        /// <param name="displayMember">显示字段</param>
        /// <param name="valueMember">值字段</param>
        /// <param name="showRowIndicator">是否显示序号</param>
        /// <param name="showCheckbox">是否显示复选框</param>
        /// <param name="keyFieldName">设置父子递归关系字段-子字段，不指定则使用valueMember</param>
        /// <param name="parentFieldName">设置父子递归关系字段-父字段，不指定则不嵌套展示</param>
        /// <param name="rootValue">根节点的值</param>
        /// <param name="editable">树节点是否可以编辑</param>
        /// <param name="showColumnHeader">是否显示列头</param>
        /// <param name="oddEvenRowColor">是否奇偶行不同颜色</param>
        /// <param name="allowDrop">是否运行拖动列</param>
        /// <param name="lookUpColumnInfos">显示的列</param>
        /// <returns></returns>
        public static object BindDictItems(this TreeListLookUpEdit lookup, object dataSource, string displayMember, string valueMember, bool showRowIndicator = true,
            bool showCheckbox = false, string keyFieldName = null, string parentFieldName = null, string rootValue = null, bool editable = true,
            bool showColumnHeader = false, bool oddEvenRowColor = true, bool allowDrop = false,
            params LookUpColumnInfo[] lookUpColumnInfos
        {
            lookup.Properties.DataSource = dataSource;
            lookup.Properties.DisplayMember = displayMember;
            lookup.Properties.ValueMember = valueMember;
            lookup.Properties.TreeList.OptionsView.ShowCheckBoxes = showCheckbox;

            lookup.Properties.TreeList.Columns.Clear(;
            for (int i = 0; i < lookUpColumnInfos.Length; i++
            {
                lookup.Properties.TreeList.CreateColumn(lookUpColumnInfos[i].FieldName, lookUpColumnInfos[i].Caption,
                    lookUpColumnInfos[i].Width, true;
            }

            //初始化树的样式和特性
            //keyFieldName = !string.IsNullOrWhiteSpace(keyFieldName ? keyFieldName : valueMember;//如果不指定，采用valueMember
            lookup.Properties.TreeList.InitTree(keyFieldName, parentFieldName, rootValue, editable, showColumnHeader, oddEvenRowColor, allowDrop;
            lookup.Properties.PopupFormSize = new System.Drawing.Size(lookup.Width, 300;

            lookup.Properties.ImmediatePopup = true;
            lookup.Properties.TextEditStyle = TextEditStyles.Standard;

            if (showRowIndicator
            {
                lookup.Properties.TreeList.IndicatorWidth = 40;
                //重写序号显示，默认不显示数值
                lookup.Properties.TreeList.CustomDrawNodeIndicator += (s, ee =>
                {
                    if (ee.IsNodeIndicator
                    {
                        var index = ee.Node.TreeList.GetVisibleIndexByNode(ee.Node;
                        ee.Info.DisplayText = (index + 1.ToString(;
                    }
                };
            }

            return dataSource;
        }