/// <summary>
///
/// </summary>
/// <param name="pageOfItems"></param>
/// <typeparam name="T"></typeparam>
/// <returns></returns>
public static IPageOfItems <object> ToObjectsPageOfItems <T>(this IPageOfItems <T> pageOfItems)
{
var result = new PageOfItems <object>(pageOfItems.Select(x => x as object))
{
PageIndex = pageOfItems.PageIndex,
PageSize = pageOfItems.PageSize,
TotalItemCount = pageOfItems.TotalItemCount,
SearchHitViewState = pageOfItems.SearchHitViewState
};
return(result);
}
/// <summary>
/// 获取分页列表，IEnumerable从0开始计数
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="queryable"></param>
/// <param name="totalCount"></param>
/// <param name="pageIndex"></param>
/// <param name="pageSize"></param>
/// <returns></returns>
public static IPageOfItems <T> GetPaged <T>(this IEnumerable <T> queryable, int totalCount, int pageIndex, int pageSize)
{
//初始化页面信息
var pageOfItems = new PageOfItems <T>
{
PageIndex = pageIndex,
PageSize = pageSize,
TotalItemCount = totalCount
};
pageOfItems.AddRange((queryable.Skip(pageOfItems.StartIndex).Take(pageOfItems.PageSize).ToReadOnlyCollection()).ToList());
return(pageOfItems);
}
/// <summary>
/// 将类型T的分页数据列表转换为类型TView的分页数据列表
/// </summary>
/// <typeparam name="T">原始数据类型</typeparam>
/// <typeparam name="TView">返回的数据类型</typeparam>
/// <param name="items">数据列表</param>
/// <param name="selector">数据转换选择器</param>
/// <returns>返回TView的分页数据列表</returns>
public static IPageOfItems <TView> ToView <T, TView>(this IPageOfItems <T> items, Func <T, TView> selector)
{
//初始化页面信息
var pageOfItems = new PageOfItems <TView>
{
PageIndex = items.PageIndex,
PageSize = items.PageSize,
TotalItemCount = items.TotalItemCount,
};
var list = items.Select(selector);
pageOfItems.AddRange(list.ToList());
return(pageOfItems);
}