IList - LINQ过滤和排序依据

Question

我有以下测试代码来搜索通用列表:

public void DoSearch(string searchTerm)
{

IList<MyEntity> entities = GetCollectionOfEntities();

IList<MyEntity> results = entities.Where(d => d.Description.Contains(searchTerm)).ToList();

}

我想通过参数传递一个订单(这将是MyEntity的一个属性),当然也可以根据它来排序我的结果.我知道LINQ使用OrderBy但不了解如何通过MyEntity的属性进行排序.

Answer 1

您只需使用a Func<TSource,TKey>来指定要按以下顺序排列的属性:

DoSearch("foo", e => e.SomeProperty);

// ...

public void DoSearch<TKey>(string searchTerm, Func<MyEntity, TKey> orderBy)
{
    IList<MyEntity> entities = GetCollectionOfEntities();

    IList<MyEntity> results = entities
                              .Where(e => e.Description.Contains(searchTerm))
                              .OrderBy(orderBy)
                              .ToList();

    // etc
}