public Paged(
IEnumerable <T> source,
long totalItemsCount,
int pageIndex = PageQuery.DefaultIndexFrom,
int pageSize = PageQuery.DefaultPageSize,
PageIndexFrom indexFrom = null,
bool alreadyPaged = false) : this(source, null, null, totalItemsCount, pageIndex, pageSize, indexFrom, alreadyPaged)
{
}
public Paged(
IEnumerable <T> source,
IDictionary <string, string> fields,
IEnumerable <string> keys,
long totalItemsCount,
int pageIndex = PageQuery.DefaultIndexFrom,
int pageSize = PageQuery.DefaultPageSize,
PageIndexFrom indexFrom = null,
bool alreadyPaged = false)
{
var realSource = source ?? throw new ArgumentNullException(nameof(source));
PageIndex = pageIndex;
PageSize = pageSize;
IndexFrom = indexFrom ?? PageIndexFrom.One;
if (IndexFrom.Id > PageIndex && PageIndex != 0)
{
throw new ArgumentException(
$"indexFrom ({IndexFrom.Id}) > pageIndex ({pageIndex}), must indexFrom <= pageIndex");
}
TotalItemsCount = totalItemsCount;
PagesCount = (int)Math.Ceiling(TotalItemsCount / (double)PageSize);
if (PageIndex > PagesCount)
{
PageIndex = PagesCount;
}
if (alreadyPaged)
{
Items = realSource.ToList();
}
else
{
Items = realSource.Skip((PageIndex - IndexFrom.Id) * PageSize)
.Take(PageSize)
.ToList();
}
Fields = fields;
Keys = keys;
}
public static PageQuery Get(
int pageIndex = DefaultIndexFrom,
int pageSize = DefaultPageSize,
string[] sorts = null,
string keyword = null,
PageIndexFrom indexFrom = null,
string[] searchFields = null)
{
if (pageSize < 1 || pageSize > MaxPageSize)
{
throw new ArgumentOutOfRangeException(
nameof(pageSize),
$"Please validate your pageSize. It must be greater than 0 and not exceed {MaxPageSize}");
}
return(new PageQuery
{
PageIndex = pageIndex,
PageSize = pageSize,
Sorts = sorts,
Keyword = keyword,
IndexFrom = indexFrom ?? PageIndexFrom.One,
SearchFields = searchFields
});
}
