// 摘要:
// Used for paging with an Abp.Application.Services.Dto.IPagedResultRequest object.
//
// 参数:
// query:
// Queryable to apply paging
//
// pagedResultRequest:
// An object implements Abp.Application.Services.Dto.IPagedResultRequest interface
public static IQueryable<T> PageBy<T>(this IQueryable<T> query, IPagedResultRequest pagedResultRequest);
// 摘要:
// Used for paging. Can be used as an alternative to Skip(...).Take(...) chaining.
public static IQueryable<T> PageBy<T>(this IQueryable<T> query, int skipCount, int maxResultCount);
// 摘要:
// Filters a System.Linq.IQueryable`1 by given predicate if given condition is true.
// 当给定的条件为True 的时候,通过给定的委托条件来查询
// 参数:
// query:
// Queryable to apply filtering
//
// condition:
// A boolean value
//
// predicate:
// Predicate to filter the query
//
// 返回结果:
// Filtered or not filtered query based on condition
public static IQueryable<T> WhereIf<T>(this IQueryable<T> query, bool condition, Expression<Func<T, bool>> predicate);
// 摘要:
// Filters a System.Linq.IQueryable`1 by given predicate if given condition is true.
//
// 参数:
// query:
// Queryable to apply filtering
//
// condition:
// A boolean value
//
// predicate:
// Predicate to filter the query
//
// 返回结果:
// Filtered or not filtered query based on condition
public static IQueryable<T> WhereIf<T>(this IQueryable<T> query, bool condition, Expression<Func<T, int, bool>> predicate);