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标题:
C#分页类
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作者:
aisini
时间:
2014-8-14 15:47
标题:
C#分页类
using System.Linq;
using System.Collections.Generic;
namespace CommonLibrary
{
public class PagedList<T> : List<T>
{
#region Properties
public int PageIndex { get; private set; }
public int PageSize { get; private set; }
public int TotalCount { get; private set; }
public int TotalPages { get; private set; }
public bool HasPreviousPage
{
get { return (PageIndex > 0); }
}
public bool HasNextPage
{
get { return (PageIndex + 1 < TotalPages); }
}
#endregion
#region Constructors
public PagedList(IQueryable<T> source, int pageIndex, int pageSize)
{
if (source == null || source.Count() < 1)
throw new System.ArgumentNullException("source");
int total = source.Count();
this.TotalCount = total;
this.TotalPages = total / pageSize;
if (total % pageSize > 0)
TotalPages++;
this.PageSize = pageSize;
this.PageIndex = pageIndex;
this.AddRange(source.Skip(pageIndex * pageSize).Take(pageSize).ToList());
}
public PagedList(IList<T> source, int pageIndex, int pageSize)
{
if (source == null || source.Count() < 1)
throw new System.ArgumentNullException("source");
TotalCount = source.Count();
TotalPages = TotalCount / pageSize;
if (TotalCount % pageSize > 0)
TotalPages++;
this.PageSize = pageSize;
this.PageIndex = pageIndex;
this.AddRange(source.Skip(pageIndex * pageSize).Take(pageSize).ToList());
}
public PagedList(IEnumerable<T> source, int pageIndex, int pageSize, int totalCount)
{
if (source == null || source.Count() < 1)
throw new System.ArgumentNullException("source");
TotalCount = totalCount;
TotalPages = TotalCount / pageSize;
if (TotalCount % pageSize > 0)
TotalPages++;
this.PageSize = pageSize;
this.PageIndex = pageIndex;
this.AddRange(source);
}
#endregion
}
}
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