DevExpress控件 DataGrid 单元格编辑 回车

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using CYSoft.UI.Common;
using CYSoft.Common;
using CYSoft.TS.EntityLib;
using CYSoft.IC.Common.A0;
//Dev 引用
using DevExpress.XtraEditors;
using DevExpress.XtraEditors.Repository;

namespace CYSoft.TS.UI.BookInfo
{
    public partial class FrmCellEdit : TS.UI.Common.FrmEditBase
    {
        //接口
        public IC.BookInfo bb = null;
        public FrmCellEdit()
        {
            InitializeComponent();

            bb = new IC.BookInfo();

            InitCtl();

        }

        /// <summary>
        /// 初始化
        /// </summary>
        public void InitCtl() {
            //克隆表结构 绑定到grid
            DataTable dt = b.BookGetByCode("").Tables[0].Clone();
            grid.DataSource = dt;

            //自定义方法 初始化 gv
            CYSoft.UI.Common.Function.InitGrid(this.gv,
                new string[] {"编码","名称" },
                new string[] {"BookNo","BookName" },
                new int[] {100,100 });

            //编辑列  设置
            RepositoryItemTextEdit rite = new RepositoryItemTextEdit();
            //keydown事件
            rite.KeyDown+=new KeyEventHandler(rite_KeyDown);
            gv.Columns["BookNo"].ColumnEdit = rite;

            gv.CellValueChanged += new DevExpress.XtraGrid.Views.Base.CellValueChangedEventHandler(gv_CellValueChanged);
            gv.InitNewRow += new DevExpress.XtraGrid.Views.Grid.InitNewRowEventHandler(gv_InitNewRow);
        }

        /// <summary>
        /// 单元格回车
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        void rite_KeyDown(object sender, KeyEventArgs e) {
            //用户点击 回车
            if (e.KeyCode == Keys.Enter) {
                TextEdit te = sender as TextEdit;
                //值为空时返回
                if (te == null || string.IsNullOrEmpty(te.Text.Trim())) {
                    return;
                }              

                //自定义方法，根据用户输入内容从数据库获取数据
                DataSet ds = bb.BookGetByCode(te.Text.Trim());
                //有数据记录
                if (ds.Tables[0].Rows.Count > 0) {
                    //初始化DataRow  值为 第一行数据
                    DataRow dtBook = ds.Tables[0].Rows[0];
                    //初始化DataRow  值为
                    DataRow dr = gv.GetDataRow(gv.FocusedRowHandle);
                    foreach (DataColumn dc in dr.Table.Columns) {
                        dr[dc.ColumnName] = dtBook[dc.ColumnName].ToString();
                    }
                    //终止行编辑
                    dr.EndEdit();
                    //调用方法
                    SetCellEdit(gv.FocusedRowHandle);
                    //自定义类 对gv的一些设置
                    CYSoft.TS.UI.Common.TSFunc.SetBestFitColumns(gv);
                }

            }

        }

        /// <summary>
        /// 单元格处理
        /// </summary>
        /// <param name="row"></param>
        private void SetCellEdit(int row)
        {
            Application.DoEvents();
            try
            {
                gv.BeginInit();
                grid.Focus();
                gv.Focus();
                gv.SelectCell(row, gv.Columns["BookNo"]);
                gv.FocusedColumn = gv.Columns["BookNo"];
                gv.ShowEditor();
            }
            finally
            {
                gv.EndInit();
            }
        }

        /// <summary>
        /// 单元格 焦点离开 触发该事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        void gv_CellValueChanged(object sender, DevExpress.XtraGrid.Views.Base.CellValueChangedEventArgs e)
        {
            if (e.Column.FieldName == "BookNo")
            {
                if (e.Value == null)
                    return;
            }
        }

        void gv_InitNewRow(object sender, DevExpress.XtraGrid.Views.Grid.InitNewRowEventArgs e)
        {
            SetCellEdit(e.RowHandle);
        }

        /// <summary>
        /// 增加新行
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnNewLine_Click(object sender, EventArgs e)
        {
            DataTable dt = grid.DataSource as DataTable;
            if (dt == null)
                return;

            gv.AddNewRow();
        }
    }
}