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);}