新版asp.net mvc 分页控件:HtmlHelper扩展

１，不再通过URL来取页面索引，而是通过action的参数，如{pageindex}来设置．

２，增加了传递url参数

３，提供了显示设置属性(如只显示＂上一页＂，＂下一页＂或者只显示＂数字＂)

下面是两个属性设置类：

    [System.Flags]
    public enum PageBarType : int
    {
        /// <summary>
        /// 数字
        /// </summary>
        Number = 00000001,
        /// <summary>
        /// 第一页
        /// </summary>
        First = 00000010,
        /// <summary>
        /// 最后一页
        /// </summary>
        Last = 00000100,
        /// <summary>
        /// 上一页
        /// </summary>
        Previous = 00001000,
        /// <summary>
        /// 下一页
        /// </summary>
        Next = 00010000,
        /// <summary>
        /// 总计
        /// </summary>
        Total = 00100000,
        /// <summary>
        ///  数字,第一页,最后一页
        /// </summary>
        Number_First_Last = Number | First | Last,
        /// <summary>
        /// 数字,上一页,下一页
        /// </summary>
        Number_Previous_Next = Number | Previous | Next,
        /// <summary>
        /// 上一页,下一页
        /// </summary>
        Previous_Next = Previous | Next,
        /// <summary>
        /// 上一页,下一页,第一页,最后一页
        /// </summary>
        Previous_Next_First_Last = Previous | Next | First | Last,
        /// <summary>
        /// 全部显示
        /// </summary>
        Default = Number | Previous | Next | First | Last | Total
    }
    public struct PageBarSetting
    {
        public PageBarSetting(string first, string previousArea, string previous, string next, string nextarea, string last, int totalcount,int pagesize, int pages, int displaysize)
        {
            _first = first;
            _previousarea = previousArea;
            _previous = previous;
            _next = next;
            _nextarea = nextarea;
            _last = last;
            _totalcount = totalcount;
            _pages = pages;
            _pagesize = pagesize;
            _displaysize = displaysize;
        }
        public PageBarSetting(int totalcount,int pagesize, int pages, int displaysize)
        {
            _first = string.Empty;
            _previousarea = string.Empty;
            _previous = string.Empty;
            _next = string.Empty;
            _nextarea = string.Empty;
            _last = string.Empty;
            _totalcount = totalcount;
            _pagesize = pagesize;
            _pages = pages;
            if (_pagesize > 0)
            {
                //计算页数
                _pages = _totalcount % _pagesize == 0 ? _totalcount / _pagesize : _totalcount / _pagesize + 1;
            }
            _displaysize = displaysize;
            Init();
        }
        public PageBarSetting(bool isInit)
        {
            _first = string.Empty;
            _previousarea = string.Empty;
            _previous = string.Empty;
            _next = string.Empty;
            _nextarea = string.Empty;
            _last = string.Empty;
            _totalcount = 0;
            _pages = 0;
            _pagesize = 0;
            _displaysize = 0;
            if (isInit)
            {
                Init();
            }
        }
        public void Init()
        {
            _first = "【第一页】";
            _previousarea = "<<";
            _previous = "【上一页】";
            _next = "【下一页】";
            _nextarea = ">>";
            _last = "【最后一页】";
        }
        #region = First =
        private string _first;
        public string First
        {
            get { return _first; }
            set { _first = value; }
        }
        #endregion
        #region = PreviousArea =
        private string _previousarea;
        public string PreviousArea
        {
            get { return _previousarea; }
            set { _previousarea = value; }
        }
        #endregion
        #region = Previous =
        private string _previous;
        public string Previous
        {
            get { return _previous; }
            set { _previous = value; }
        }
        #endregion
        #region = Next =
        private string _next;
        public string Next
        {
            get { return _next; }
            set { _next = value; }
        }
        #endregion
        #region = NextArea =
        private string _nextarea;
        public string NextArea
        {
            get { return _nextarea; }
            set { _nextarea = value; }
        }
        #endregion
        #region = Last =
        private string _last;
        public string Last
        {
            get { return _last; }
            set { _last = value; }
        }
        #endregion
        #region = TotalCount =
        private int _totalcount;
        public int TotalCount
        {
            get { return _totalcount; }
            set { _totalcount = value; }
        }
        #endregion
        #region = Pages =
        private int _pages;
        public int Pages
        {
            get { return _pages; }
            set { _pages = value; }
        }
        #endregion
        #region = PageSize =
        private int _pagesize;
        public int PageSize
        {
            get { return _pagesize; }
            set { _pagesize = value; }
        }
        #endregion
        #region = DisplaySize =
        private int _displaysize;
        public int DisplaySize
        {
            get { return _displaysize; }
            set { _displaysize = value; }
        }
        #endregion
    }

分页代码：

public static class PagerBarHelper
    {
        /// <summary>
        /// 分页HTML生成器
        /// </summary>
        /// <param name="helper">待扩展的HtmlHelper</param>
        /// <param name="totalCount">数据总数</param>
        /// <param name="pageSize">页数</param>
        /// <param name="displaySize">分页控件允许显示的页数</param>
        /// <param name="htmlAttributes">html属性</param>
        /// <returns></returns>
        public static string PagerBar(this HtmlHelper helper, int totalCount,int pageSize, int displaySize, object htmlAttributes)
        {
            if (totalCount <= pageSize) return string.Empty;
            //计算页数
            int pages = totalCount % pageSize == 0 ? totalCount / pageSize : totalCount / pageSize + 1;
            return PagerBar(helper, htmlAttributes, totalCount, pages, displaySize);
        }
        
        /// <summary>
        /// 分页HTML生成器
        /// </summary>
        /// <param name="helper">待扩展的HtmlHelper</param>
        /// <param name="htmlAttributes">html属性</param>
        /// <param name="totalCount">数据总数</param>
        /// <param name="pages">总页数</param>
        /// <param name="displaySize">分页控件允许显示的页数</param>
        /// <returns></returns>
        public static string PagerBar(this HtmlHelper helper, object htmlAttributes, int totalCount, int pages, int displaySize)
        {
            PageBarSetting pbSetting = new PageBarSetting(true);
            pbSetting.TotalCount = totalCount;
            pbSetting.Pages = pages;
            pbSetting.DisplaySize = displaySize;
            return PagerBar(helper, htmlAttributes, pbSetting, PageBarType.Previous_Next | PageBarType.First);
        }
        public static string PagerBar(this HtmlHelper helper, object htmlAttributes, PageBarSetting pbSetting, PageBarType pbType)
        {
            //只有一页数据,不显示分页
            if (pbSetting.Pages < 2) return string.Empty;
            //string path = HttpContext.Current.Request.Url.AbsolutePath;
            //url参数
            string query = HttpContext.Current.Request.Url.Query;
            //Regex reg = new Regex(@"^(.+?)/(/d*?)/?$", RegexOptions.IgnoreCase);
            //Match match = reg.Match(path);
            int currentIndex = Convert.ToInt32(helper.ViewContext.RouteData.Values["pageindex"]);
            System.Web.Routing.Route route = (System.Web.Routing.Route)helper.ViewContext.RouteData.Route;
            string urlPattern = route.Url.ToLower();
            //将路由形式转化字符串格式化形式,{pageindex}转成{0}
            string urlmodel = "/" + urlPattern.Replace("pageindex", "0");
            foreach (KeyValuePair<string, object> v in helper.ViewContext.RouteData.Values)
            {
                urlmodel = urlmodel.Replace(string.Format("{{{0}}}", v.Key.ToLower()), v.Value.ToString());
            }
            //url模板
            //string urlmodel = path.EndsWith("/") || path.EndsWith("//") ? path : path + "/";
            //while (!match.Success)
            //{
            //    urlmodel += "1/";
            //    match = reg.Match(urlmodel);
            //}
            //if (match.Success)
            //{
            //    urlmodel = match.Groups[1].Value;
            //    try
            //    {
            //        currentIndex = Convert.ToInt32(match.Groups[2].Value);
            //    }
            //    catch
            //    {
            //        //防止胡乱输入URL
            //    }
            //}
            StringBuilder sBuilder = new StringBuilder();
            sBuilder.Append("<span");
            //HTML属性设置
            if (htmlAttributes != null)
            {
                string t = htmlAttributes.GetType().ToString();
                foreach (PropertyInfo pi in htmlAttributes.GetType().GetProperties())
                {
                    sBuilder.AppendFormat(" {0}=/"{1}/"", pi.Name, pi.GetValue(htmlAttributes, null));
                }
            }
            sBuilder.Append(">");
            if ((pbType | PageBarType.Total) == pbType)
            {
                if (pbSetting.TotalCount > 0)
                {
                    sBuilder.AppendFormat("总共<label>{0}</label>条, ", pbSetting.TotalCount);
                }
                sBuilder.AppendFormat("当前<label>{0}</label>/<label>{1}</label>页,", currentIndex, pbSetting.Pages);
            }
            if (currentIndex > 1)
            {
                if ((pbType | PageBarType.First) == pbType)
                {
                    sBuilder.AppendFormat(@"<a href=""{0}{1}"" target=""_self"">{2}</a>", string.Format(urlmodel, 1), query, pbSetting.First);
                }
                if ((pbType | PageBarType.Previous) == pbType)
                {
                    sBuilder.AppendFormat(@"<a href=""{0}{1}"" target=""_self"">{2}</a>", string.Format(urlmodel, currentIndex - 1), query, pbSetting.Previous);
                }
            }
            #region =页码区域起始点=
            int areaStart = currentIndex % pbSetting.DisplaySize > 0 ? currentIndex / pbSetting.DisplaySize * pbSetting.DisplaySize + 1 : (currentIndex - 1) / pbSetting.DisplaySize * pbSetting.DisplaySize + 1;
            #endregion
            #region =显示上一个页码区间,并往前翻到区间末尾页=
            if (currentIndex > pbSetting.DisplaySize)
            {
                if ((pbType | PageBarType.Number) == pbType)
                {
                    sBuilder.AppendFormat(@"<a href=""{0}{1}"" target=""_self"">{2}</a>", string.Format(urlmodel, areaStart - 1), query, pbSetting.PreviousArea);
                }
            }
            #endregion
            #region =计算分页需要显示的页码区域=
            if ((pbType | PageBarType.Number) == pbType)
            {
                for (int i = areaStart; i < areaStart + pbSetting.DisplaySize; i++)
                {
                    //如果当前页超出总页数范围,则不再生成页码
                    if (i > pbSetting.Pages) break;
                    if (i == currentIndex)
                    {
                        //当前页没有链接,设置标签
                        sBuilder.AppendFormat(@"<span><label>{0}</label></span>", i);
                    }
                    else
                    {
                        sBuilder.AppendFormat(@"<span><a href=""{0}{1}"" target=""_self"">{2}</a></span>", string.Format(urlmodel, i), query, i);
                    }
                }
            }
            #endregion
            #region =显示下一个页码区间,并往后翻到区间首页=
            if (areaStart + pbSetting.DisplaySize <= pbSetting.Pages)
            {
                if ((pbType | PageBarType.Number) == pbType)
                {
                    sBuilder.AppendFormat(@"<a href=""{0}{1}"" target=""_self"">{2}</a>", string.Format(urlmodel, areaStart + pbSetting.DisplaySize), query, pbSetting.NextArea);
                }
            }
            #endregion
            if (currentIndex < pbSetting.Pages)
            {
                if ((pbType | PageBarType.Next) == pbType)
                {
                    sBuilder.AppendFormat(@"<a href=""{0}{1}"" target=""_self"">{2}</a>", string.Format(urlmodel, currentIndex + 1), query, pbSetting.Next);
                }
                if ((pbType | PageBarType.Last) == pbType)
                {
                    sBuilder.AppendFormat(@"<a href=""{0}{1}"" target=""_self"">{2}</a>", string.Format(urlmodel, pbSetting.Pages), query,pbSetting.Last);
                }
            }
            sBuilder.Append("</span>");
            return sBuilder.ToString();
        }

css样式代码：

 .PageBar2
        {
            width: 578px;
            font-size: 12px;
            font-family: Tahoma;
        }
        .PageBar2 label
        {
            color: #3399FF;
        }
        .PageBar2 span
        {
            padding: 0px 3px 0px 3px;
        }
        .PageBar2 a:link, .PageBar2 a:visited
        {
            color: #629836;
            text-decoration:none;
        }
        .PageBar2 a:hover
        {
            color: #629836;
            text-decoration:underline;
        }
        .PageBar2 span a:link,.PageBar2 span a:visited
        {
            color: #629836;
            text-decoration:underline;
        }
      
        .PageBar2 span a:hover { background-color:#009900; color:#FFFFFF;}
        /* Current Page Number */
        .PageBar2 span label
        {
            color: #3399FF;
            text-decoration:none;
        }

使用示例：

<%=Html.PagerBar(new { @class = "PageBar2" }, new PageBarSetting(1000, 10, 0, 5), PageBarType.Previous_Next)%>

PageBarType类型可自由组合设置，如

<%=Html.PagerBar(new { @class = "PageBar2" }, new PageBarSetting(1000, 10, 0, 10), PageBarType.Number_Previous_Next|PageBarType.First)%>