ASP.NET MVC+Bootstrap个人博客之打造清新分页Helper（三）

有点另类，分页直接是在后台拼接好html，然后发送到前台的：

　　1. 分页容器：

<div class="pagination">
    <ul>
       //************分页HTML*********
    </ul>
</div>

2.  PagerHelper：

namespace ZYN.BLOG.WebHelper
{
    public class PagerHelper
    {
        /// <summary>
        /// 生成分页Html数据
        /// </summary>
        /// <param name="currentPage">当前页</param>
        /// <param name="pageSize">页容量</param>
        /// <param name="totalCount">数据总条数</param>
        /// <returns>pagerHtmlString</returns>
        public static string GeneratePagerString(int currentPage, int pageSize, int totalCount)
        {
            var redirectToUrl = HttpContext.Current.Request.Url.AbsolutePath;
            pageSize = pageSize <= 0 ? 4 : pageSize;

            //1.0 总页数
            int totalPages = Math.Max((totalCount + pageSize - 1) / pageSize, 1);

            //2.0 分页条的容量
            int pageBarSize = 6;//默认一个分页条显示6个页码。分页条容量 

            //3.0 分页条的个数 totalPages个页数按 pageBarSize = 6  可以 分为多少个分页条
            int pageBarNum = (totalPages + pageBarSize - 1) / pageBarSize; // totalPages=13时，也就是把13个页码分成3个分页条

            //判断当前页currentPage坐落在第几个分页条内
            int position = (currentPage - 1) / pageBarSize;  

            //根据分页条的序号，计算出该分页条的第一个页码start和最后一个页码end
            int start = position * pageBarSize + 1;

            //如果是最后一个分页条，则需判断它实际的页条容量；否则页条容量就是pageBarSize
            int curBarCapacity = pageBarSize;
            if (position == pageBarNum - 1)
            {
                curBarCapacity = totalPages - (pageBarNum - 1) * pageBarSize;
            }

            StringBuilder pagerHtmlString = new StringBuilder();
            StringBuilder endHtmlString = new StringBuilder();

            //处理首页
            pagerHtmlString.AppendFormat("<li id='start-page'><a href='{0}?pageIndex={1}&pageSize={2}'>首页</a></li> ", redirectToUrl, 1, pageSize);

            //处理上一页:如果当前页不是第一页,就加上上一页
            if (currentPage > 1)
            {
                pagerHtmlString.AppendFormat("<li class='prev-page'><a href='{0}?pageIndex={1}&pageSize={2}'>上一页</a></li> ", redirectToUrl, currentPage - 1, pageSize);
            }

            //假如起始位置start为1  7  13
            for (int i = 0; i < curBarCapacity; i++)  //curBarCapacity=3  i=0 1 2
            {
                int j = start + i; //要显示的页码当量值
                if (j == currentPage)
                {
                    //对当前页的处理:class=active
                    pagerHtmlString.AppendFormat("<li class='active show-page'><span>{0}</span></li> ", currentPage);

                    if (curBarCapacity == pageBarSize)
                    {
                        //不处理最后一个分页条页
                        if (currentPage == start + pageBarSize - 1)
                        {
                            if (currentPage + 1 < totalPages)
                            {
                                endHtmlString.AppendFormat("<li class='show-page'><a href='{0}?pageIndex={1}&pageSize={2}'>{3}</a></li>", redirectToUrl, currentPage + 1, pageSize, currentPage + 1);
                            }
                            endHtmlString.Append("<li class='show-page'><span>...</span></li>");
                            endHtmlString.AppendFormat("<li class='show-page'><a href='{0}?pageIndex={1}&pageSize={2}'>{3}</a></li>", redirectToUrl, totalPages, pageSize, totalPages);
                        }
                    }

                }
                else
                {
                    pagerHtmlString.AppendFormat("<li class='show-page'><a href='{0}?pageIndex={1}&pageSize={2}'>{3}</a></li> ", redirectToUrl, j, pageSize, j);
                }
            }

            //省略号的处理
            pagerHtmlString.Append(endHtmlString.ToString());

            //处理下一页：如果当前页不是最后一页，则加上下一页。也即中间的所有分页条都显示下一页
            if (currentPage != totalPages)
            {
                pagerHtmlString.AppendFormat("<li class='next-page'><a href='{0}?pageIndex={1}&pageSize={2}'>下一页</a></li> ", redirectToUrl, currentPage + 1, pageSize);
            }

            //处理末页
            pagerHtmlString.AppendFormat("<li id='end-page'><a href='{0}?pageIndex={1}&pageSize={2}'>末页</a></li> ", redirectToUrl, totalPages, pageSize);

            pagerHtmlString.AppendFormat("<li id='total-page'><span>共-{0}-页</span></li>", totalPages);

            pagerHtmlString.Append(" ");

            return pagerHtmlString.ToString();
        }
    }
}

3 渲染出来的分页HTML是这样的：

<div class="pagination">
    <ul> 　　　　<li id="start-page"><a href="/Home/WrapArtList/0?pageIndex=1&amp;pageSize=6">首页</a></li>  　　　　<li class="active show-page"><span>1</span></li>  　　　　<li class="show-page"><a href="/Home/WrapArtList/0?pageIndex=2&amp;pageSize=6">2</a></li>  　　　　<li class="show-page"><a href="/Home/WrapArtList/0?pageIndex=3&amp;pageSize=6">3</a></li> 　　　  <li class="show-page"><a href="/Home/WrapArtList/0?pageIndex=4&amp;pageSize=6">4</a></li>  　　　　<li class="show-page"><a href="/Home/WrapArtList/0?pageIndex=5&amp;pageSize=6">5</a></li> 　　　  <li class="next-page"><a href="/Home/WrapArtList/0?pageIndex=2&amp;pageSize=6">下一页</a></li> 　　　　<li id="end-page"><a href="/Home/WrapArtList/0?pageIndex=5&amp;pageSize=6">末页</a></li>  　　　　<li id="total-page"><span>共-5-页</span></li>     </ul>
</div>

4. CSS样式：

/* 分页样式pagination ====== */
.pagination { /* div pagination*/
    margin: 0;
    padding: 20px;
    text-align: center;
    font-size: 12px;
    display: block;
}

    .pagination ul {
        display: inline-block;
        *display: inline;
        *zoom: 1;
        margin-left: 0;
        margin-bottom: 0;
        padding: 0;
    }

        .pagination ul > li {
            display: inline;
        }

            .pagination ul > li > a,
            .pagination ul > li > span {
                margin: 0 2px;
                float: left;
                padding: 5px 12px;
                background-color: #ddd;
                color: #666;
                border-radius: 2px;
                opacity: .88;
            }

                .pagination ul > li > a:hover,
                .pagination ul > li > a:focus {
                    background-color: #bce8f1;
                }

        .pagination ul > .active > a,
        .pagination ul > .active > span {
            background-color: #45B6F7;
            color: #fff;
        }

        .pagination ul > .active > a,
        .pagination ul > .active > span {
            cursor: default;
        }

        .pagination ul > li > span,
        .pagination ul > .disabled > span,
        .pagination ul > .disabled > a,
        .pagination ul > .disabled > a:hover,
        .pagination ul > .disabled > a:focus {
            color: #999999;
            background-color: transparent;
            cursor: default;
        }
/* 自定义的分页pagination 结束====== */