using DevExpress.XtraEditors.Repository;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 Form1 : Form    {        public Form1()        {            InitializeComponent();        }        private void Form1_Load(object sender, EventArgs e)        {            InitData();            gridControl1.DataSource = Products;            gridView1.Columns["UnitPrice"].DisplayFormat.FormatType = DevExpress.Utils.FormatType.Numeric;            gridView1.Columns["UnitPrice"].DisplayFormat.FormatString = "c2";            // Create an in-place LookupEdit control.            RepositoryItemLookUpEdit riLookup = new RepositoryItemLookUpEdit();            riLookup.DataSource = Categories;            riLookup.ValueMember = "ID";            riLookup.DisplayMember = "CategoryName";            // Enable the "best-fit" functionality mode in which columns have proportional widths and the popup window is resized to fit all the columns.            //最佳弹出  模式            riLookup.BestFitMode = DevExpress.XtraEditors.Controls.BestFitMode.BestFitResizePopup;            // Specify the dropdown height.  设置高度            riLookup.DropDownRows = Categories.Count;            // Enable the automatic completion feature. In this mode, when the dropdown is closed,             // the text in the edit box is automatically completed if it matches a DisplayMember field value of one of dropdown rows.             // 自动搜索            riLookup.SearchMode = DevExpress.XtraEditors.Controls.SearchMode.AutoFilter;            // Specify the column against which an incremental search is performed in SearchMode.AutoComplete and SearchMode.OnlyInPopup modes            riLookup.AutoSearchColumnIndex = 1;            // Optionally hide the Description column in the dropdown.            // riLookup.PopulateColumns();            // riLookup.Columns["Description"].Visible = false;            // Assign the in-place LookupEdit control to the grid‘s CategoryID column.            // Note that the data types of the "ID" and "CategoryID" fields match.            //绑定到某列中            gridView1.Columns["CategoryID"].ColumnEdit = riLookup;            gridView1.BestFitColumns();        }        List<Product> Products = new List<Product>();        List<Category> Categories = new List<Category>();        private void InitData()        {            Products.Add(new Product() { ProductName = "Sir Rodney‘s Scones", CategoryID = 3, UnitPrice = 10 });            Products.Add(new Product() { ProductName = "Gustaf‘s Knäckebröd", CategoryID = 5, UnitPrice = 21 });            Products.Add(new Product() { ProductName = "Tunnbröd", CategoryID = 5, UnitPrice = 9 });            Products.Add(new Product() { ProductName = "Guaraná Fantástica", CategoryID = 1, UnitPrice = 4.5m });            Products.Add(new Product() { ProductName = "NuNuCa Nuß-Nougat-Creme", CategoryID = 3, UnitPrice = 14 });            Products.Add(new Product() { ProductName = "Gumbär Gummibärchen", CategoryID = 3, UnitPrice = 31.23m });            Products.Add(new Product() { ProductName = "Rössle Sauerkraut", CategoryID = 7, UnitPrice = 45.6m });            Products.Add(new Product() { ProductName = "Thüringer Rostbratwurst", CategoryID = 6, UnitPrice = 123.79m });            Products.Add(new Product() { ProductName = "Nord-Ost Matjeshering", CategoryID = 8, UnitPrice = 25.89m });            Products.Add(new Product() { ProductName = "Gorgonzola Telino", CategoryID = 4, UnitPrice = 12.5m });            Categories.Add(new Category() { ID = 1, CategoryName = "Beverages", Description = "Soft drinks, coffees, teas, beers, and ales" });            Categories.Add(new Category() { ID = 2, CategoryName = "Condiments", Description = "Sweet and savory sauces, relishes, spreads, and seasonings" });            Categories.Add(new Category() { ID = 3, CategoryName = "Confections", Description = "Desserts, candies, and sweet breads" });            Categories.Add(new Category() { ID = 4, CategoryName = "Dairy Products", Description = "Cheeses" });            Categories.Add(new Category() { ID = 5, CategoryName = "Grains/Cereals", Description = "Breads, crackers, pasta, and cereal" });            Categories.Add(new Category() { ID = 6, CategoryName = "Meat/Poultry", Description = "Prepared meats" });            Categories.Add(new Category() { ID = 7, CategoryName = "Produce", Description = "Dried fruit and bean curd" });            Categories.Add(new Category() { ID = 8, CategoryName = "Seafood", Description = "Seaweed and fish" });        }    }    public class Product    {        public string ProductName { get; set; }        public decimal UnitPrice { get; set; }        public int CategoryID { get; set; }    }    public class Category    {        public int ID { get; set; }        public string CategoryName { get; set; }        public string Description { get; set; }    }}