扩展HtmlHelper类实现Mvc4分页

浏览数：18 / 时间：2015年06月09日

1、扩展HtmlHelper类方法Pager

public static HtmlString Pager(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、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.Pager(Model.Pager.CurrentPageIndex, Model.Pager.PageSize, Model.Pager.RecordCount)
                             </span>
                         </td>
                     </tr>
                 </tbody>