Demo的界面

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我利用事件委托事件，仿http://www.cnblogs.com/huyong/写的公共分页用户控件

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#region  版权信息
/*---------------------------------*
// 项目  名称：《Winform分页控件》
// 文  件  名： Pager.cs
// 描      述： 分页控件
// 作      者：kwon yan
*----------------------------------*/
#endregion

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace HuishengFS.Controls
{
    /**/
    /// <summary>
    /// 申明委托
    /// </summary>
    /// <param name="e"></param>
    /// <returns></returns>
    public delegate int EventPagingHandler(EventPagingArg e);
    /**/
    /// <summary>
    /// 分页控件呈现
    /// </summary>
    public partial class Pager : UserControl
    {
        public Pager()
        {
            InitializeComponent();
        }
        public event EventPagingHandler EventPaging;
        /**/
        /// <summary>
        /// 每页显示记录数
        /// </summary>
        private int _pageSize = 50;
        /**/
        /// <summary>
        /// 每页显示记录数
        /// </summary>
        public int PageSize
        {
            get { return _pageSize; }
            set
            {
                _pageSize = value;
                GetPageCount();
            }
        }

        private int _nMax = 0;
        /**/
        /// <summary>
        /// 总记录数
        /// </summary>
        public int NMax
        {
            get { return _nMax; }
            set
            {
                _nMax = value;
                GetPageCount();
            }
        }

        private int _pageCount = 0;
        /**/
        /// <summary>
        /// 页数=总记录数/每页显示记录数
        /// </summary>
        public int PageCount
        {
            get { return _pageCount; }
            set { _pageCount = value; }
        }

        private int _pageCurrent = 0;
        /**/
        /// <summary>
        /// 当前页号
        /// </summary>
        public int PageCurrent
        {
            get { return _pageCurrent; }
            set { _pageCurrent = value; }
        }

        /// <summary>
        /// 设置页面大小
        /// </summary>
        private void GetPageCount()
        {
            if (this.NMax > 0)
            {
                this.PageCount = Convert.ToInt32(Math.Ceiling(Convert.ToDouble(this.NMax) / Convert.ToDouble(this.PageSize)));
                lblPageCount.Text = " / " + PageCount.ToString();
                //lblPageCount1.Text = "每页 "+PageSize .ToString ()+" 条，共 "+PageCount.ToString()+" 页";
                lblPageCount1.Text = "Page no: " + PageSize.ToString() + ",Total:" + PageCount.ToString() + " pages";
            }
            else
            {
                this.PageCount = 0;
            }
        }

        /**/
        /// <summary>
        /// 翻页控件数据绑定的方法 关键是这步，都是调用这里
        /// </summary>
        public void Bind()
        {
            if (this.EventPaging != null)
            {
                this.NMax = this.EventPaging(new EventPagingArg(this.PageCurrent));
            }

            if (this.PageCurrent > this.PageCount)
            {
                this.PageCurrent = this.PageCount;
            }
            if (this.PageCount == 1)
            {
                this.PageCurrent = 1;
            }
            lblcurentpage.Text = PageCurrent.ToString();
            //lblRecordCount.Text = "共有 " + NMax.ToString() + " 条记录";
            lblRecordCount.Text = "Total: " + NMax.ToString() + " records";
          

            btnPrev.Enabled = true;
            btnFirst.Enabled = true;
            btnLast.Enabled = true;
            btnNext.Enabled = true;

            if (this.PageCu