/*
 ASP.NET MvcPager 分页组件
 Copyright:2009-2011 陕西省延安市吴起县 杨涛\Webdiyer (http://www.webdiyer.com)
 Source code released under Ms-PL license
 */

using System.Linq;

namespace Webdiyer.WebControls.Mvc
{
    public static class PageLinqExtensions
    {
        public static PagedList<T> ToPagedList<T>
            (
                this IQueryable<T> allItems,
                int pageIndex,
                int pageSize
            )
        {
            if (pageIndex < 1)
                pageIndex = 1;
            var itemIndex = (pageIndex-1) * pageSize;
            var pageOfItems = allItems.Skip(itemIndex).Take(pageSize);
            var totalItemCount = allItems.Count();
            return new PagedList<T>(pageOfItems, pageIndex, pageSize, totalItemCount);
        }
    }
}



/*
 ASP.NET MvcPager 分页组件
 Copyright:2009-2011 陕西省延安市吴起县 杨涛\Webdiyer (http://www.webdiyer.com)
 Source code released under Ms-PL license
 */
using System;
using System.Collections.Generic;

namespace Webdiyer.WebControls.Mvc
{
    public class PagedList<T> : List<T>,IPagedList
    {

        public PagedList(IEnumerable<T> items, int pageIndex, int pageSize, int totalItemCount)
        {
            AddRange(items);
            TotalItemCount = totalItemCount;
            CurrentPageIndex = pageIndex;
            PageSize = pageSize;
        }

        public int CurrentPageIndex { get; set; }
        public int PageSize { get; set; }
        public int TotalItemCount { get; set; }
        public int TotalPageCount { get { return (int)Math.Ceiling(TotalItemCount / (double)PageSize); } }
        public int StartRecordIndex { get { return (CurrentPageIndex - 1) * PageSize + 1; } }
        public int EndRecordIndex { get { return TotalItemCount > CurrentPageIndex * PageSize ? CurrentPageIndex * PageSize : TotalItemCount; } }
    }
}