public enum Sort { ASC,DESC } public static IQueryable<T> CreateSortQuery<T>(IQueryable<T> query, string field, Sort sort) { ParameterExpression param = Expression.Parameter(typeof(T), field); System.Reflection.PropertyInfo pi = typeof(T).GetProperty(field); Type[] types = new Type[2]; types[0] = typeof(T); types[1] = pi.PropertyType; string sortwith; if (sort == Sort.DESC) sortwith = "OrderBy"; else sortwith = "OrderByDescending"; Expression exp = Expression.Call(typeof(Queryable), sortwith, types, query.Expression, Expression.Lambda(Expression.Property(param, field), param)); return query.AsQueryable().Provider.CreateQuery<T>(exp); }
联系客服