private IEnumerable <CategoryListViewModel> OrderData(int column, DtOrderDir orderDirection, List <CategoryListViewModel> categories)
{
switch (column)
{
case 1:
return(orderDirection == DtOrderDir.Asc ? categories.OrderBy(x => x.Name) : categories.OrderByDescending(x => x.Name));
default:
return(orderDirection == DtOrderDir.Asc ? categories.OrderBy(x => x.Name) : categories.OrderByDescending(x => x.Name));
}
}
public static IQueryable <T> OrderByDynamic <T>(
this IQueryable <T> query,
string orderByMember,
DtOrderDir ascendingDirection)
{
var param = Expression.Parameter(typeof(T), "c");
var body = orderByMember.Split('.').Aggregate <string, Expression>(param, Expression.PropertyOrField);
var queryable = ascendingDirection == DtOrderDir.Asc ?
(IOrderedQueryable <T>)Queryable.OrderBy(query.AsQueryable(), (dynamic)Expression.Lambda(body, param)) :
(IOrderedQueryable <T>)Queryable.OrderByDescending(query.AsQueryable(), (dynamic)Expression.Lambda(body, param));
return(queryable);
}
