最近项目中用到MVC3,很多分页，本人习惯自己自己去实现一些代码，看了很多控件，总感觉代码有点多，还要去应用他们的DLL。甚是繁琐。所以就自己实现一下。

定义分页信息类

/// 
    /// 分页信息    /// 
    public class PagingInfo    {        /// 
        /// 显示连续页码数量        /// 
        public int ShowNum { get; set; }        /// 
        /// 记录总数        /// 
        public int TotalItems { get; set; }        /// 
        /// 每页记录数        /// 
        public int ItemsPerPage { get; set; }        /// 
        /// 当前页        /// 
        public int CurrentPage { get; set; }        /// 
        /// 是否显示第一页和最后一页        /// 
        private bool _IsShowFirstLast = true;        public bool IsShowFirstLast { get { return _IsShowFirstLast; } set { _IsShowFirstLast = value; } }        public int TotalPages        {            get { return (int)Math.Ceiling((decimal)TotalItems / ItemsPerPage); }        }    }

 

分页扩展

/// 
        /// 根据pageInfo 生成一个分页控件        /// 
        ///         ///         ///         /// 
              public static MvcHtmlString PageLinks(this HtmlHelper html, PagingInfo pageInfo, Func
      
        pageUrl)        {            StringBuilder result = new StringBuilder(1000);            bool isEven = (pageInfo.ShowNum & 1).Equals(0);            int middleCeilingNum = (int)Math.Ceiling((decimal)pageInfo.ShowNum / 2);            int middleFloorNum = (int)Math.Floor((decimal)pageInfo.ShowNum / 2);            middleFloorNum = middleFloorNum == 0 ? 1 : middleFloorNum;            int beginIndex = 1;//控件开始页数            int endIndex = 1;//控件结束页数            if (pageInfo.ShowNum >= pageInfo.TotalPages)            {                beginIndex = 1;                endIndex = pageInfo.TotalPages;            }            else            {                if (!isEven)                {                    beginIndex = pageInfo.CurrentPage <= middleCeilingNum                        ? 1                        : pageInfo.CurrentPage - middleFloorNum;                    endIndex = pageInfo.CurrentPage <= middleCeilingNum                        ? pageInfo.ShowNum                        : pageInfo.CurrentPage + middleFloorNum;                    beginIndex = pageInfo.CurrentPage + middleCeilingNum > pageInfo.TotalPages                        ? pageInfo.TotalPages - pageInfo.ShowNum + 1                        : beginIndex;                    endIndex = pageInfo.CurrentPage + middleCeilingNum > pageInfo.TotalPages                        ? pageInfo.TotalPages                        : endIndex;                }                else                {                    beginIndex = pageInfo.CurrentPage <= middleCeilingNum ? 1 : pageInfo.CurrentPage - middleFloorNum + 1;                    endIndex = pageInfo.CurrentPage <= middleCeilingNum ? pageInfo.ShowNum : pageInfo.CurrentPage + middleFloorNum;                    beginIndex = pageInfo.CurrentPage + middleCeilingNum > pageInfo.TotalPages                        ? pageInfo.TotalPages - pageInfo.ShowNum + 1                        : beginIndex;                    endIndex = pageInfo.CurrentPage + middleCeilingNum > pageInfo.TotalPages                        ? pageInfo.TotalPages                        : endIndex;                }            }            beginIndex = pageInfo.CurrentPage == pageInfo.ShowNum - middleFloorNum + 1                ? beginIndex - 1 : beginIndex;            beginIndex = pageInfo.CurrentPage == pageInfo.TotalPages + pageInfo.ShowNum - middleFloorNum                    ? beginIndex + 1 : beginIndex;            endIndex = pageInfo.CurrentPage == pageInfo.TotalPages - middleFloorNum - 1                ? endIndex + 1 : endIndex;            if (pageInfo.TotalPages <= pageInfo.ShowNum + 2)            {                result.Append(GetMiddle(pageInfo, beginIndex, endIndex, pageUrl));            }            else            {                //前一页                if (pageInfo.CurrentPage != 1)                    result.Append(GetUrl(pageInfo, pageUrl, pageInfo.CurrentPage - 1, "上一页").ToString());                //第一页                if (pageInfo.CurrentPage > middleCeilingNum + 1 && pageInfo.IsShowFirstLast)                    result.Append(GetUrl(pageInfo, pageUrl, 1, "1").ToString());                if (pageInfo.CurrentPage > middleCeilingNum && pageInfo.CurrentPage != pageInfo.ShowNum - middleFloorNum + 1)                    result.Append(GetSplitStr().ToString());                result.Append(GetMiddle(pageInfo, beginIndex, endIndex, pageUrl));                if (pageInfo.CurrentPage < pageInfo.TotalPages - middleFloorNum && pageInfo.CurrentPage != pageInfo.TotalPages - middleFloorNum - 1)                    result.Append(GetSplitStr().ToString());                //最后一页                if (                    pageInfo.CurrentPage < pageInfo.TotalPages - (middleFloorNum + 1) && pageInfo.IsShowFirstLast)                    result.Append(GetUrl(pageInfo, pageUrl, pageInfo.TotalPages, pageInfo.TotalPages + "").ToString());                //下一页                if (pageInfo.TotalPages != 1 && (pageInfo.CurrentPage != pageInfo.TotalPages))                    result.Append(GetUrl(pageInfo, pageUrl, pageInfo.CurrentPage + 1, "下一页").ToString());            }            return MvcHtmlString.Create(result.ToString());        }        /// 
       
        /// 特殊页面(第一页，前一页，后一页，最后一页)的连接生成        /// 
        /// 
               /// 
               /// 
               /// 
       显示文字        /// 
               private static TagBuilder GetUrl(PagingInfo pageInfo, Func
       
         pageUrl, int i, string ShowTag)        {            TagBuilder tag = new TagBuilder("a");            tag.MergeAttribute("href", pageUrl(i));            tag.InnerHtml = ShowTag;            return tag;        }        private static TagBuilder GetSplitStr()        {            TagBuilder tag = new TagBuilder("span");            tag.MergeAttribute("class", "psplit");            tag.InnerHtml = "...";            return tag;        }        /// 
        
        ///         /// 
        /// 
                private static string GetMiddle(PagingInfo pageInfo, int beginIndex, int endIndex, Func
        
          pageUrl)        {            StringBuilder result = new StringBuilder(300);            for (int i = beginIndex; i <= endIndex; i++)            {                TagBuilder tag = new TagBuilder("a");                tag.MergeAttribute("href", pageUrl(i));                tag.InnerHtml = i.ToString();                if (i == pageInfo.CurrentPage)                    tag.AddCssClass("selected");                result.Append(tag.ToString());            }            return result.ToStr();        }
        
       
      

 

定义一个model

public class PhotoAlbumReply : IReply    {        public string Id { get; set; }        public string Content { get; set; }    }

  

定义一个viewmodel

public class PhotoAlbumReplyViewModel    {        public IEnumerable
      
        PhotoAlbumReplys { get; set; }        public PagingInfo PagingInfo { get; set; }    }
      

 

写自己的controller

public ActionResult List(int page)        {            int pageSize = 20;            int count = 100;//这个自己去实现            IEnumerable
      
        PhotoAlbumReplys = null;//这个自己去实现            return View(                new PhotoAlbumReplyViewModel()                {                    PhotoAlbumReplys = PhotoAlbumReplys,                    PagingInfo = new PagingInfo()                    {                        IsShowFirstLast = true,                        ShowNum = 4,                        CurrentPage = page,                        ItemsPerPage = pageSize,                        TotalItems = count                    }                });        }
      

 

view 调用

@{    ViewBag.Title = "List";}@model ViewModel.PhotoAlbumReplyViewModel @if (null != Model.PhotoAlbumReplys && Model.PhotoAlbumReplys.Count() > 0)    {
      
        foreach (var item in Model.PhotoAlbumReplys)        {        
        }       
           
        
                 
ID
                 
content
            
        
                     
@item.Id
                     
@item.TargetId
                     
@item.Content
                  
       
      
} 
      
        @Html.PageLinks(Model.PagingInfo, x => Url.Action("List", "Photo", new {page=x})) 
      

打完收工。