public ISortableFilter <T> ApplySortable <T>(ISortableFilter <T> filter, string propertyName = null, SortDirection sortDirection = SortDirection.Ascending)
{
ApplySortable(filter, propertyName);
filter.SortDirection = sortDirection;
return(filter);
}
public ISortableFilter <T> ApplySortable <T>(ISortableFilter <T> filter, string propertyName = null, string sortDirection = nameof(SortDirection.Ascending))
{
ApplySortable(filter, propertyName);
if (Enum.TryParse(sortDirection, out SortDirection sd))
{
filter.SortDirection = sd;
}
return(filter);
}
private void ApplySortable <T>(ISortableFilter <T> filter, string propertyName = null)
{
if (!string.IsNullOrWhiteSpace(propertyName))
{
var property = typeof(T)
.GetProperties()
.FirstOrDefault(x => x.Name == propertyName);
if (property != null)
{
var parameterExpression = Expression.Parameter(typeof(T));
var propertyExpression = Expression.Property(parameterExpression, property);
var convertedPropertyExpression = Expression.Convert(propertyExpression, typeof(object));
var propertyFunction = Expression.Lambda <Func <T, object> >(convertedPropertyExpression, parameterExpression).Compile();
filter.Sort = propertyFunction;
}
}
}
