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&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&pageSize=6">2</a></li> <li class="show-page"><a href="/Home/WrapArtList/0?pageIndex=3&pageSize=6">3</a></li> <li class="show-page"><a href="/Home/WrapArtList/0?pageIndex=4&pageSize=6">4</a></li> <li class="show-page"><a href="/Home/WrapArtList/0?pageIndex=5&pageSize=6">5</a></li> <li class="next-page"><a href="/Home/WrapArtList/0?pageIndex=2&pageSize=6">下一页</a></li> <li id="end-page"><a href="/Home/WrapArtList/0?pageIndex=5&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====== */
