c#，用户控件，分页浏览，winform，datagridview，BandingNavigator，bandingSource Virus

分页用户控件，使用效果如上图，可以用在查询窗体，代码如下：

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

namespace Kimbanx.SecurityDiskSystem.Controls
{
    public partial class SelectPaging : UserControl
    {/**//// <summary>
        /// 每页显示记录数
        /// </summary>
        private int _pageSize = 20;
        /**//// <summary>
        /// 每页显示记录数
        /// </summary>
        public int PageSize
        {
            get { return _pageSize; }
            set { _pageSize = value; }
        }/**//// <summary>
        /// 总记录数
        /// </summary>
        private int _nMax = 0;
        /**//// <summary>
        /// 总记录数
        /// </summary>
        public int NMax
        {
            get { return _nMax; }
            set { _nMax = value; }
        }/**//// <summary>
        /// 页数=总记录数/每页显示记录数
        /// </summary>
        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; }
        }/**//// <summary>
        /// 当前页号
        /// </summary>
        private int _pageCurrent = 0;
        /**//// <summary>
        /// 当前页号
        /// </summary>
        public int PageCurrent
        {
            get { return _pageCurrent; }
            set { _pageCurrent = value; }
        }/**//// <summary>
        /// 当前记录行
        /// </summary>
        private int _nCurrent = 0;
        /**//// <summary>
        /// 当前记录行
        /// </summary>
        public int NCurrent
        {
            get { return _nCurrent; }
            set { _nCurrent = value; }
        }
        /**//// <summary>
        /// 设置数据源
        /// </summary>
        private DataTable dataSource = null;
        /**//// <summary>
        /// 设置数据源
        /// </summary>
        public DataTable DataSource
        {
            get { return dataSource; }
            set { dataSource = value; }
        }
        //private DataSet ds = null;

        public void InitDataSet(DataTable dt)
        {
            this.dataSource = dt;
            this._nMax = this.dataSource.Rows.Count;
            //计算总页数
            this._pageCount = _nMax / _pageSize;
            //
            if ((_nMax % _pageSize) > 0)
                _pageCount++;
            _pageCurrent = 1;
            _nCurrent = 0;
            FillData();
        }
        /**//// <summary>
        /// 默认构造函数
        /// </summary>
        public SelectPaging()
        {
            InitializeComponent();
            lblMsg.Enabled = false;

        }
        /**//// <summary>
        /// 填充数据
        /// </summary>
        private void FillData()
        {
            //当前页面开始记录行
            int nStartPos = 0;
            //当前页面结束记录行
            int nEndPos = 0;
            DataTable dtTemp = this.dataSource.Clone();
            if (this._pageCurrent == this._pageCount)
                nEndPos = _nMax;
            else
                nEndPos = this._pageCurrent * this._pageSize;

            nStartPos = this._nCurrent;

            lblMaxPage.Text = this._pageCount.ToString();
            txtCurrentPage.Text = this._pageCurrent.ToString();

            for (int i = nStartPos; i < nEndPos; i++)
            {
                dtTemp.ImportRow(this.dataSource.Rows[i]);
                _nCurrent++;
            }
            bdSource.DataSource = dtTemp;
            bdNav.BindingSource = bdSource;
            dataGV.DataSource = bdSource;

        }

        private void bdNav_ItemClicked(object sender, ToolStripItemClickedEventArgs e)
        {
            switch (e.ClickedItem.Text)
            {
                case "移到上一条记录":
                    //FillData();
                    break;
                case "移到下一条记录":
                    //FillData();
                    break;
                case "上一页":
                   
                    if (this._pageCurrent == 1)
                    {
                        lblMsg.Text = "已经是第一页，请点击“下一页”查看！";
                        //btnPrePage.Enabled = false;
                        return;
                    }
                    else
                    { _pageCurrent--;
                        this._nCurrent = this._pageSize * (_pageCurrent - 1);
FillData();
                    }

                    break;
                case "下一页":
                    
                    if (this._pageCurrent == _pageCount)
                    {
                        lblMsg.Text = "已经是最后一页，请点击“上一页”查看！";
                        return;
                    }
                    else
                    {
_pageCurrent++;
                        this._nCurrent = this._pageSize * (_pageCurrent - 1); FillData();
                    }
                   
                    break;
            }
            
        }
    }
}