视频1 视频21 视频41 视频61 视频文章1 视频文章21 视频文章41 视频文章61 推荐1 推荐3 推荐5 推荐7 推荐9 推荐11 推荐13 推荐15 推荐17 推荐19 推荐21 推荐23 推荐25 推荐27 推荐29 推荐31 推荐33 推荐35 推荐37 推荐39 推荐41 推荐43 推荐45 推荐47 推荐49 关键词1 关键词101 关键词201 关键词301 关键词401 关键词501 关键词601 关键词701 关键词801 关键词901 关键词1001 关键词1101 关键词1201 关键词1301 关键词1401 关键词1501 关键词1601 关键词1701 关键词1801 关键词1901 视频扩展1 视频扩展6 视频扩展11 视频扩展16 文章1 文章201 文章401 文章601 文章801 文章1001 资讯1 资讯501 资讯1001 资讯1501 标签1 标签501 标签1001 关键词1 关键词501 关键词1001 关键词1501 专题2001
ASP.NET MVC4 HtmlHelper扩展类,实现分页功能
2020-11-27 22:37:51 责编:小采
文档


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。

下载本文
显示全文
专题