using System.Linq;
namespace CN.Core
{
/// <summary>
/// A class that handles pagination of an IQueryable
/// </summary>
/// <typeparam name="T"></typeparam>
public class CNPagedList<T>
{
/// <summary>
/// Constructor
/// </summary>
/// <param name="list">The full list of items you would like to paginate</param>
/// <param name="page">(optional) The current page number</param>
/// <param name="pageSize">(optional) The size of the page</param>
public CNPagedList(IQueryable<T> list, int?page=null, int?pageSize=null)
{
_list = list;
_page = page;
_pageSize = pageSize;
}
private IQueryable<T> _list;
/// <summary>
/// The paginated result
/// </summary>
public IQueryable<T> items
{
get
{
if (_list == null) return null;
return _list.Skip((page - 1) * pageSize).Take(pageSize);
}
}
private int? _page;
/// <summary>
/// The current page.
/// </summary>
public int page
{
get
{
if (!_page.HasValue)
{
return 1;
}
else
{
return _page.Value;
}
}
}
private int? _pageSize;
/// <summary>
/// The size of the page.
/// </summary>
public int pageSize
{
get
{
if (!_pageSize.HasValue)
{
return _list == null ? 0 : _list.Count();
}
else
{
return _pageSize.Value;
}
}
}
/// <summary>
/// The total number of items in the original list of items.
/// </summary>
public int totalItemCount
{
get
{
return _list == null ? 0 : _list.Count();
}
}
}
}