关键代码：

        public static void Filter(this TreeList tree, FilterCondition fc)        {            if (tree != null && fc != null)            {                if (!tree.OptionsBehavior.EnableFiltering)                    tree.OptionsBehavior.EnableFiltering = true;                tree.FilterConditions.Clear();                tree.FilterConditions.Add(fc);            }        }

测试代码：

        private void Form1_Load(object sender, EventArgs e)        {            this.InitData();            this.treeList1.DataSource = PersonList;            this.lookUpEdit1.BindWithAutoCompletion(PersonList, "Name", "Name", "输入需要搜索的....");            this.lookUpEdit1.AddDeleteButton("删除选中数据....");            this.lookUpEdit1.KeyDown += new KeyEventHandler(lookUpEdit1_KeyDown);        }        void lookUpEdit1_KeyDown(object sender, KeyEventArgs e)        {            if (e.KeyCode == Keys.Enter)            {                Person _curPerson = lookUpEdit1.GetSelectedDataRow() as Person;                FilterCondition _curFc = new FilterCondition(FilterConditionEnum.NotContains, treeList1.Columns["Name"], _curPerson.Name);                treeList1.Filter(_curFc);            }        }

实现效果：

树所有数据：

筛选后的数据：

希望有所帮助！

[DevExpress]TreeList数据筛选