private Page <TResult> GetPageInternal <TSource, TResult>(IQueryable <TSource> items, PagingOptions options, Expression <Func <TSource, TResult> > selector)
where TSource : class
where TResult : class
{
var filtered = Filter(items, options);
var sorted = Sort(filtered, options.SortSetting);
var elements = sorted
.GetPage(options.PageNumber, options.PageSize)
.Select(selector)
.ToList();
return(new Page <TResult>()
{
Items = elements,
PageNumber = options.PageNumber,
PageSize = options.PageSize,
Total = filtered.Count(),
});
}
public static async Task <Page <TResult> > GetPageAsync <TSource, TResult>(IQueryable <TSource> items, PagingOptions options, Expression <Func <TSource, TResult> > selector)
where TSource : class
where TResult : class
{
return(await new Pager()
.GetPageInternalAsync(items, options, selector));
}
public static Page <TResult> GetPage <TSource, TResult>(IEnumerable <TSource> items, PagingOptions options, Expression <Func <TSource, TResult> > selector)
where TSource : class
where TResult : class
{
return(new Pager()
.GetPageInternal(items.AsQueryable(), options, selector));
}
public static async Task <Page <T> > GetPageAsync <T>(IQueryable <T> items, PagingOptions options)
where T : class
{
return(await GetPageAsync(items, options, i => i));
}
public static Page <T> GetPage <T>(IEnumerable <T> items, PagingOptions options)
where T : class
{
return(GetPage(items, options, i => i));
}