ASP.NET MVC4 HtmlHelper扩展类，实现分页功能

1、扩展HtmlHelper类方法ShowPageNavigate

public static HtmlString ShowPageNavigate（this HtmlHelper htmlHelper, int currentPage, int pageSize, int totalCount）{var redirectTo = htmlHelper.ViewContext.RequestContext.HttpContext.Request.Url.AbsolutePath;pageSize = pageSize == 0 ? 3 : pageSize;var totalPages = Math.Max（（totalCount + pageSize - 1） / pageSize, 1）; //总页数var output = new StringBuilder（）;if （totalPages > 1）{output.AppendFormat（"<a class="pageLink" href="{0}?pageIndex=1&pageSize={1}">首页</a> ", redirectTo, pageSize）;if （currentPage > 1）{//处理上一页的连接output.AppendFormat（"<a class="pageLink" href="{0}?pageIndex={1}&pageSize={2}">上一页</a> ", redirectTo, currentPage - 1, pageSize）;}output.Append（" "）;int currint = 5;for （int i = 0; i <= 10; i++）{//一共最多显示10个页码，前面5个，后面5个if （（currentPage + i - currint） >= 1 && （currentPage + i - currint） <= totalPages）{if （currint == i）{//当前页处理output.AppendFormat（"<a class="cpb" href="{0}?pageIndex={1}&pageSize={2}">{3}</a> ", redirectTo, currentPage, pageSize, currentPage）;}else{//一般页处理output.AppendFormat（"<a class="pageLink" href="{0}?pageIndex={1}&pageSize={2}">{3}</a> ", redirectTo, currentPage + i - currint, pageSize, currentPage + i - currint）;}}output.Append（" "）;}if （currentPage < totalPages）{//处理下一页的链接output.AppendFormat（"<a class="pageLink" href="{0}?pageIndex={1}&pageSize={2}">下一页</a> ", redirectTo, currentPage + 1, pageSize）;}output.Append（" "）;if （currentPage ！= totalPages）{output.AppendFormat（"<a class="pageLink" href="{0}?pageIndex={1}&pageSize={2}">末页</a> ", redirectTo, totalPages, pageSize）;}output.Append（" "）;}output.AppendFormat（"<label>第{0}页 / 共{1}页</label>", currentPage, totalPages）;//这个统计加不加都行return new HtmlString（output.ToString（））;}

2、添加公共类PagerInfo,PageQuery

public class PagerInfo{public int RecordCount { get; set; }public int CurrentPageIndex { get; set; }public int PageSize { get; set; }}public class PagerQuery<TPager, TEntityList>{public PagerQuery（TPager pager, TEntityList entityList）{this.Pager = pager;this.EntityList = entityList;}public TPager Pager { get; set; }public TEntityList EntityList { get; set; }}

3、然后在Controller里面添加Action

public ActionResult Index（int? pageSize, int? pageIndex）{int pageIndex1 = pageIndex ?? 1;int pageSize1 = pageSize ?? 5;int count = 0;//从数据库在取得数据，并返回总记录数var temp = newsSer.LoadPageEntities（c => true, c => c.id, false, pageSize1, pageIndex1, out count）;PagerInfo pager = new PagerInfo（）;pager.CurrentPageIndex = pageIndex1;pager.PageSize = pageSize1;pager.RecordCount = count;PagerQuery<PagerInfo, IQueryable<news>> query = new PagerQuery<PagerInfo, IQueryable<news>>（pager, temp）;return View（query）;}

4、View里的部分代码

<tbody>@foreach （var item in Model.EntityList）{<tr><td class="checkBox"><input name="ids[]" type="checkbox" value="" /></td><td>@item.author</td><td>@item.title</td><td>@item.ctime</td><td>@Html.ActionLink（"编辑", "Edit", new { id = item.id }） |@Html.ActionLink（"删除", "Delete", new { id = item.id }）</td></tr>}@*分页*@<tr class=""><td colspan="5" align="center" class="paginator"><span>@Html.ShowPageNavigate（Model.Pager.CurrentPageIndex, Model.Pager.PageSize, Model.Pager.RecordCount）</span></td></tr></tbody>

5、添加一些样式

.paginator{font: 12px Arial, Helvetica, sans-serif;padding: 10px 20px 10px 0;margin: 0px auto;} .paginator a{border: solid 1px #ccc;color: #0063dc;cursor: pointer;text-decoration: none;} .paginator a:visited{padding: 1px 6px;border: solid 1px #ddd;background: #fff;text-decoration: none;} .paginator .cpb{border: 1px solid #F50;font-weight: 700;color: #F50;background-color: #ffeee5;} .paginator a:hover{border: solid 1px #F50;color: #f60;text-decoration: none;} .paginator a, .paginator a:visited, .paginator .cpb, .paginator a:hover{float: left;height: 16px;line-height: 16px;min-width: 10px;_width: 10px;margin-right: 5px;text-align: center;white-space: nowrap;font-size: 12px;font-family: Arial,SimSun;padding: 0 3px;} .paginator label{display:block;float:left;}

6.总结

这个案例简单实现了在MVC中快速分页，其实很多开源的项目中都有相关的HtmlHepler的扩展函数，其中也不乏带有分页的扩展，例如著名的开源商城项目nopCommerce，其中有就一个HtmlExtensions.cs扩展类，里面就有关于分页的扩展，人家写的可是相当专业哦，有兴趣的可以研究一下。