Items = new ObservableCollection<CompanyContact>(
db.CompanyContacts
.Include(p => p.Facility)
.Include(p => p.Company)
.Include(p => p.Manager)
.OrderBy(s => s.Name)
.ToList<CompanyContact>()
);
有更优雅的方式来写吗?
我想在表格中包含所有关系。像IncludeAll
这样的东西?
谢谢!
答案 0 :(得分:3)
EF doen没有包含所有导航属性的方法。如果您需要急切加载所有这些内容,除了要为要加载的每个导航属性调用所有包含外,别无选择。稍微优雅的解决方案可能是使用以下扩展方法之一:
public static class IQueryableExtensions
{
public static IQueryable<TEntity> GetAllIncluding<TEntity>(this IQueryable<TEntity> queryable, params string[] includeProperties)
{
return includeProperties.Aggregate(queryable, (current, includeProperty) => current.Include(includeProperty));
}
public static IQueryable<TEntity> GetAllIncludingWithFunc<TEntity>(this IQueryable<TEntity> queryable, params Expression<Func<TEntity, object>>[] includeProperties)
{
return includeProperties.Aggregate(queryable, (current, includeProperty) => current.Include(includeProperty));
}
}
例如,使用第一种方法,您的查询将如下所示:
db.CompanyContacts.GetAllIncluding("Facility","Company", "Manager").OrderBy(s => s.Name).ToList();