/// <summary>
/// Paging filter for IQueryable
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="source">source query</param>
/// <param name="pageCondition">this interface with page number and page size</param>
/// <param name="maxPageSize">limit PageSize parameter</param>
/// <returns></returns>
public static IQueryable <T> FilterPage <T>(this IQueryable <T> source, IPageCondition pageCondition, int?maxPageSize = null)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
if (pageCondition == null)
{
throw new ArgumentNullException(nameof(pageCondition));
}
if (maxPageSize is < 0)
{
throw new ArgumentOutOfRangeException(nameof(maxPageSize), "can't be bellow zero");
}
var pageSize = maxPageSize.HasValue ? Math.Min(maxPageSize.Value, pageCondition.PageSize) : pageCondition.PageSize;
return(source.FilterPage(pageCondition.Page, pageSize));
}
public static IQueryable <T> Page <T>(this IQueryable <T> current, IPageCondition <T> condition)
{
return(current.Where(condition.Filter)
.OrderBy(condition.SortDirect, condition.SortField ?? typeof(T).GetProperties(BindingFlags.Instance | BindingFlags.Public).FirstOrDefault().Name)
.Page(condition.Page, condition.Limit));
}
