/// <summary>
/// OrderBy extension
/// </summary>
/// <typeparam name="T">Entity type</typeparam>
/// <param name="source">Source collection</param>
/// <param name="sortField">Sorting field by</param>
/// <param name="orderRule">Order rule</param>
/// <returns>Sorted iqueryable</returns>
public static IQueryable <T> OrderBy <T>(this IQueryable <T> source, SortFields sortField, OrderRule orderRule)
{
var type = typeof(T);
var property = type.GetProperty(sortField.ToString());
var parameter = Expression.Parameter(type, "p");
var propertyAccess = Expression.MakeMemberAccess(parameter, property);
var orderByExp = Expression.Lambda(propertyAccess, parameter);
var resultExp = Expression.Call(
typeof(Queryable),
orderRule == OrderRule.Asc ? "OrderBy" : "OrderByDescending",
new[] { type, property.PropertyType },
source.Expression,
Expression.Quote(orderByExp));
return(source.Provider.CreateQuery <T>(resultExp));
}
