OrderedQuery.cs 1.4 KB

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  1. using Ant.Core;
  2. using Ant.Infrastructure;
  3. using Ant.ORM;
  4. using Ant.Query.QueryExpressions;
  5. using System;
  6. using System.Collections.Generic;
  7. using System.Linq;
  8. using System.Linq.Expressions;
  9. using System.Text;
  10. namespace Ant.Query
  11. {
  12. class OrderedQuery<T> : Queryable<T>, IOrderedQuery<T>
  13. {
  14. public OrderedQuery(AntORM dbContext, QueryExpression exp, bool trackEntity)
  15. : base(dbContext, exp, trackEntity)
  16. {
  17. }
  18. /// <summary>
  19. /// 按升序执行次要排序
  20. /// </summary>
  21. /// <typeparam name="K"></typeparam>
  22. /// <param name="predicate"></param>
  23. /// <returns></returns>
  24. public IOrderedQuery<T> ThenBy<K>(Expression<Func<T, K>> predicate)
  25. {
  26. OrderExpression e = new OrderExpression(QueryExpressionType.ThenBy, typeof(T), this.QueryExpression, predicate);
  27. return new OrderedQuery<T>(this.DbContext, e, this._trackEntity);
  28. }
  29. /// <summary>
  30. /// 按降序执行次要排序
  31. /// </summary>
  32. /// <typeparam name="K"></typeparam>
  33. /// <param name="predicate"></param>
  34. /// <returns></returns>
  35. public IOrderedQuery<T> ThenByDesc<K>(Expression<Func<T, K>> predicate)
  36. {
  37. OrderExpression e = new OrderExpression(QueryExpressionType.ThenByDesc, typeof(T), this.QueryExpression, predicate);
  38. return new OrderedQuery<T>(this.DbContext, e, this._trackEntity);
  39. }
  40. }
  41. }