Dev RepositoryItemTreeListLookUpEdit Demo

.desiner.cs

namespace WindowsFormsApplication1
{
    partial class Form2
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.components = new System.ComponentModel.Container();
            this.filterControl1 = new DevExpress.XtraEditors.FilterControl();
            this.gridControl1 = new DevExpress.XtraGrid.GridControl();
            this.gridView1 = new DevExpress.XtraGrid.Views.Grid.GridView();
            this.gridColumn1 = new DevExpress.XtraGrid.Columns.GridColumn();
            this.gridColumn2 = new DevExpress.XtraGrid.Columns.GridColumn();
            this.repositoryItemTreeListLookUpEditGroup = new DevExpress.XtraEditors.Repository.RepositoryItemTreeListLookUpEdit();
            this.repositoryItemTreeListLookUpEdit1TreeList = new DevExpress.XtraTreeList.TreeList();
            ((System.ComponentModel.ISupportInitialize)(this.gridControl1)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this.gridView1)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this.repositoryItemTreeListLookUpEditGroup)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this.repositoryItemTreeListLookUpEdit1TreeList)).BeginInit();
            this.SuspendLayout();
            // 
            // filterControl1
            // 
            this.filterControl1.Cursor = System.Windows.Forms.Cursors.Arrow;
            this.filterControl1.Dock = System.Windows.Forms.DockStyle.Left;
            this.filterControl1.Location = new System.Drawing.Point(0, 0);
            this.filterControl1.Name = "filterControl1";
            this.filterControl1.Size = new System.Drawing.Size(215, 451);
            this.filterControl1.SourceControl = this.gridControl1;
            this.filterControl1.TabIndex = 0;
            this.filterControl1.Text = "filterControl1";
            // 
            // gridControl1
            // 
            this.gridControl1.Dock = System.Windows.Forms.DockStyle.Fill;
            this.gridControl1.Location = new System.Drawing.Point(215, 0);
            this.gridControl1.MainView = this.gridView1;
            this.gridControl1.Name = "gridControl1";
            this.gridControl1.RepositoryItems.AddRange(new DevExpress.XtraEditors.Repository.RepositoryItem[] {
            this.repositoryItemTreeListLookUpEditGroup});
            this.gridControl1.Size = new System.Drawing.Size(516, 451);
            this.gridControl1.TabIndex = 1;
            this.gridControl1.ViewCollection.AddRange(new DevExpress.XtraGrid.Views.Base.BaseView[] {
            this.gridView1});
            // 
            // gridView1
            // 
            this.gridView1.Columns.AddRange(new DevExpress.XtraGrid.Columns.GridColumn[] {
            this.gridColumn1,
            this.gridColumn2});
            this.gridView1.GridControl = this.gridControl1;
            this.gridView1.Name = "gridView1";
            this.gridView1.OptionsBehavior.AllowAddRows = DevExpress.Utils.DefaultBoolean.True;
            this.gridView1.OptionsView.NewItemRowPosition = DevExpress.XtraGrid.Views.Grid.NewItemRowPosition.Top;
            // 
            // gridColumn1
            // 
            this.gridColumn1.Caption = "Group Name";
            this.gridColumn1.FieldName = "groupName";
            this.gridColumn1.Name = "gridColumn1";
            this.gridColumn1.Visible = true;
            this.gridColumn1.VisibleIndex = 0;
            // 
            // gridColumn2
            // 
            this.gridColumn2.Caption = "Group";
            this.gridColumn2.ColumnEdit = this.repositoryItemTreeListLookUpEditGroup;
            this.gridColumn2.FieldName = "groupCode";
            this.gridColumn2.FieldNameSortGroup = "By Code";
            this.gridColumn2.FilterMode = DevExpress.XtraGrid.ColumnFilterMode.DisplayText;
            this.gridColumn2.Name = "gridColumn2";
            this.gridColumn2.Visible = true;
            this.gridColumn2.VisibleIndex = 1;
            // 
            // repositoryItemTreeListLookUpEditGroup
            // 
            this.repositoryItemTreeListLookUpEditGroup.AutoHeight = false;
            this.repositoryItemTreeListLookUpEditGroup.Buttons.AddRange(new DevExpress.XtraEditors.Controls.EditorButton[] {
            new DevExpress.XtraEditors.Controls.EditorButton(DevExpress.XtraEditors.Controls.ButtonPredefines.Combo)});
            this.repositoryItemTreeListLookUpEditGroup.DisplayMember = "name";
            this.repositoryItemTreeListLookUpEditGroup.Name = "repositoryItemTreeListLookUpEditGroup";
            this.repositoryItemTreeListLookUpEditGroup.TreeList = this.repositoryItemTreeListLookUpEdit1TreeList;
            this.repositoryItemTreeListLookUpEditGroup.ValueMember = "id";
            // 
            // dataTableBindingSource
            // 
            // 
            // repositoryItemTreeListLookUpEdit1TreeList
            // 
            this.repositoryItemTreeListLookUpEdit1TreeList.KeyFieldName = "id";
            this.repositoryItemTreeListLookUpEdit1TreeList.Location = new System.Drawing.Point(0, 0);
            this.repositoryItemTreeListLookUpEdit1TreeList.Name = "repositoryItemTreeListLookUpEdit1TreeList";
            this.repositoryItemTreeListLookUpEdit1TreeList.OptionsBehavior.EnableFiltering = true;
            this.repositoryItemTreeListLookUpEdit1TreeList.OptionsView.ShowIndentAsRowStyle = true;
            this.repositoryItemTreeListLookUpEdit1TreeList.ParentFieldName = "pId";
            this.repositoryItemTreeListLookUpEdit1TreeList.Size = new System.Drawing.Size(400, 200);
            this.repositoryItemTreeListLookUpEdit1TreeList.TabIndex = 0;
            // 
            // Form2
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(731, 451);
            this.Controls.Add(this.gridControl1);
            this.Controls.Add(this.filterControl1);
            this.Name = "Form2";
            this.Text = "Form2";
            ((System.ComponentModel.ISupportInitialize)(this.gridControl1)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this.gridView1)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this.repositoryItemTreeListLookUpEditGroup)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this.repositoryItemTreeListLookUpEdit1TreeList)).EndInit();
            this.ResumeLayout(false);

        }

        #endregion

        private DevExpress.XtraEditors.FilterControl filterControl1;
        private DevExpress.XtraGrid.GridControl gridControl1;
        private DevExpress.XtraGrid.Views.Grid.GridView gridView1;
        private DevExpress.XtraGrid.Columns.GridColumn gridColumn1;
        private DevExpress.XtraGrid.Columns.GridColumn gridColumn2;
        private DevExpress.XtraEditors.Repository.RepositoryItemTreeListLookUpEdit repositoryItemTreeListLookUpEditGroup;
        private DevExpress.XtraTreeList.TreeList repositoryItemTreeListLookUpEdit1TreeList;
    }
}

.cs

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 WindowsFormsApplication1
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
            this.repositoryItemTreeListLookUpEditGroup.DataSource = getDataTable();
            this.repositoryItemTreeListLookUpEdit1TreeList.DataSource = getDataTable();
            gridControl1.DataSource = GetItemList();
        }

        private DataTable getDataTable()
        {
            var dataTable = new DataTable();

            dataTable.Columns.Add("id", typeof(int));
            dataTable.Columns.Add("pId", typeof(int));
            dataTable.Columns.Add("name", typeof(string));

            dataTable.Rows.Add(1, null, "Name1");
            dataTable.Rows.Add(2, null, "Name2");
            dataTable.Rows.Add(3, null, "Name3");
            dataTable.Rows.Add(4, 1, "Name1.1");
            dataTable.Rows.Add(5, 1, "Name1.2");
            dataTable.Rows.Add(6, 3, "Name3.1");
            dataTable.Rows.Add(7, 3, "Name3.2");
            dataTable.Rows.Add(8, 5, "Name1.2.1");
            return dataTable;
            //var treeListLookUpEdit = new TreeListLookUpEdit();
            //var properties = treeListLookUpEdit.Properties;

            //properties.DataSource = dataTable;
            //properties.DisplayMember = "Name";
            //properties.ValueMember = "ID";

            //var treeList = properties.TreeList;

            //treeList.KeyFieldName = "ID";
            //treeList.ParentFieldName = "Parent_ID";
            //treeList.RootValue = DBNull.Value;

            //Controls.Add(treeListLookUpEdit);

            //treeListLookUpEdit.Size = treeListLookUpEdit.CalcBestSize();
        }

        private List<ItemModel> GetItemList()
        {
            return new List<ItemModel>()
            {
                new ItemModel(){ groupName="Group Name 1", groupCode= "Name3"},
                new ItemModel(){ groupName="Group Name 2", groupCode= "Name2"},
                new ItemModel(){ groupName="Group Name 3", groupCode= "Name3"},
            };
        }
    }
}