/// <summary>
        /// 初始化GridLookUpEdit组件
        /// </summary>
        /// <param name="rep"></param>
        private void InitGridLookUpEdit(RepositoryItemGridLookUpEdit rep)
        {
            GridView view = rep.View;

            view.Columns.Add(new GridColumn { Caption = "货号", FieldName = "GoodsNo", Width = 100, VisibleIndex = 0 });
            view.Columns.Add(new GridColumn { Caption = "品名", FieldName = "ProductName", Width = 200, VisibleIndex = 1 });
            view.Columns.Add(new GridColumn { Caption = "客户", FieldName = "CustomerName", Width = 100, VisibleIndex = 2 });

            rep_Grid.PopupFormSize = new Size(450, 300);//下拉窗体尺寸
            rep_Grid.AcceptEditorTextAsNewValue = DevExpress.Utils.DefaultBoolean.True; //重要！！！接受文本框的值作为新值显示
            rep_Grid.View.RowHeight = 22; //行高
            rep_Grid.ImmediatePopup = true;//输入值立即弹出下拉窗体
            rep_Grid.SearchMode = GridLookUpSearchMode.AutoSearch;//设置为自动搜索模式，重要！！！
            rep_Grid.PopupFilterMode = DevExpress.XtraEditors.PopupFilterMode.Contains;//表格筛选列过滤模式
            rep_Grid.TextEditStyle = DevExpress.XtraEditors.Controls.TextEditStyles.Standard;//允许录入资料
            rep_Grid.View.OptionsView.ShowAutoFilterRow = true;//下拉表格显示过滤行

            //绑定下拉窗体数据源
            rep_Grid.DataSource = DemoData.GetGoodsList();
            rep_Grid.ProcessNewValue += OnGrid_ProcessNewValue; //在输入框录入新值处理事件
        }

        /// <summary>
        /// 输入新值，若下拉窗体没有匹配数据，自动添加到下拉表格的数据源
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void OnGrid_ProcessNewValue(object sender, DevExpress.XtraEditors.Controls.ProcessNewValueEventArgs e)
        {
            var editor = sender as GridLookUpEdit;

            //处理空值
            if (e.DisplayValue == null || String.IsNullOrWhiteSpace(e.DisplayValue.ToString()) || e.DisplayValue.ToString() == editor.Properties.NullText)
            {
                return;
            }

            //数据源添加一条记录
            var list = editor.Properties.DataSource as List<GoodsItem>;
            list.Add(new GoodsItem { GoodsNo = e.DisplayValue.ToString() });//这里必须是对应DisplayMember字段

            e.Handled = true;
        }

 public Form1()
        {
            InitializeComponent();
            InitGridLookUpEdit(rep_Grid);
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            //设置显示字段与取值字段名称
            //DisplayMember：显示数据的字段，显示数据源中该字段的数据。
            //ValueMember：取值字段，用户在下拉窗体中选择一条记录，获取该字段的值并赋值给数据源。
            rep_Grid.DisplayMember = "GoodsNo";
            rep_Grid.ValueMember = "GoodsNo";

            gridControl1.DataSource = DemoData.GetGridData();
        }

    internal class DemoData
    {
        /// <summary>
        /// 表格数据源
        /// </summary>
        /// <returns></returns>
        public static List<GoodsItem> GetGridData()
        {
            var result = new List<GoodsItem>()
            {
                new GoodsItem{ GoodsNo="G001", ProductName="鼠标01", Qty=200 },
                new GoodsItem{ GoodsNo="G=A01", ProductName="键盘102", Qty=105 },
                new GoodsItem{ GoodsNo="Xa-99", ProductName="机箱GameBox", Qty=100 },
            };
            return result;
        }

        /// <summary>
        /// 表格下拉窗体数据源
        /// </summary>
        /// <returns></returns>
        public static List<GoodsItem> GetGoodsList()
        {
            var result = new List<GoodsItem>()
            {
                new GoodsItem{ CustomerName="联想", GoodsNo="G001", ProductName="鼠标01", Qty=200 },
                new GoodsItem{ CustomerName="ASUS",GoodsNo="A=AC01", ProductName="键盘102", Qty=105 },
                new GoodsItem{ CustomerName="DELL",GoodsNo="D9B9", ProductName="键盘102", Qty=100 },
                new GoodsItem{ CustomerName="ACER",GoodsNo="AXa001", ProductName="机箱GameBox", Qty=100 },
                new GoodsItem{ CustomerName="ACER",GoodsNo="AX8B70", ProductName="键盘A102", Qty=100 },
                new GoodsItem{ CustomerName="联想",GoodsNo="GXzC", ProductName="鼠标A01", Qty=100 },
                new GoodsItem{ CustomerName="ASUS",GoodsNo="AXa99B", ProductName="机箱GameBox", Qty=100 },
                new GoodsItem{ CustomerName="联想",GoodsNo="GXa2", ProductName="鼠标B01", Qty=100 },
            };
            return result;
        }

    }

    public class GoodsItem
    {
        public string CustomerName { get; set; }
        public string ProductName { get; set; }
        public string GoodsNo { get; set; }
        public int Qty { get; set; }

    }