public virtual IEnumerable <T> Filter(TFilterDefinition filterDefinition, CurrentPageInformation pagingInfo, SortSpecification sortSpecification, out int count)
{
var data = PrepareFilter(filterDefinition);
count = data.Count();
return(SortAndPage(data, sortSpecification, pagingInfo));
}
protected virtual IQueryable <T> Page(IQueryable <T> data, CurrentPageInformation pagingInfo)
{
Debug.Assert(data != null);
if (pagingInfo == null)
{
return(data);
}
return(data.Skip(pagingInfo.PageSize * (pagingInfo.Page - 1)).Take(pagingInfo.PageSize));
}
public virtual IQueryable <T> SortAndPage(IQueryable <T> data, SortSpecification sortSpecification, CurrentPageInformation pagingInfo)
{
string sort = null;
if (sortSpecification != null && !string.IsNullOrWhiteSpace(sort = sortSpecification.ToString()))
{
return(Page(data.OrderBy(sort), pagingInfo));
}
return(Page(data.OrderByDescending(DefaultOrderSelector()), pagingInfo));
}
