public IQueryable <T> ApplyFilters <T>(IQueryable <T> query)
{
if (this.HasFilters)
{
var gridFilter = new GridFilter <T>();
IQueryable <T> filteredQuery = null;
foreach (var filterSet in this.Filters)
{
if (filterSet.Filter1 != null)
{
switch (FilterLogic)
{
case FilterLogic.And:
filteredQuery = gridFilter.Filter(filterSet.Filter1.Field, filterSet.Filter1.Value,
filterSet.Filter1.Operator, filteredQuery ?? query);
break;
case FilterLogic.Or:
if (filteredQuery != null)
{
filteredQuery =
filteredQuery.AsParallel().ToList().Union(gridFilter.Filter(filterSet.Filter1.Field,
filterSet.Filter1.Value,
filterSet.Filter1.Operator,
query).AsParallel().ToList()).AsQueryable();
}
else
{
filteredQuery = gridFilter.Filter(filterSet.Filter1.Field, filterSet.Filter1.Value,
filterSet.Filter1.Operator, query);
}
break;
}
}
if (filterSet.Filter2 != null)
{
switch (filterSet.Logic)
{
case FilterLogic.And:
filteredQuery = gridFilter.Filter(filterSet.Filter2.Field, filterSet.Filter2.Value,
filterSet.Filter2.Operator, filteredQuery ?? query);
break;
case FilterLogic.Or:
filteredQuery =
filteredQuery.AsParallel().ToList().Union(gridFilter.Filter(filterSet.Filter2.Field,
filterSet.Filter2.Value,
filterSet.Filter2.Operator,
query).AsParallel().ToList()).AsQueryable();
break;
}
}
}
return(filteredQuery);
}
return(null);
}