c# – Linq从nestes列表中选择peroperty
发布时间:2020-12-16 01:27:11 所属栏目:百科 来源:网络整理
导读:那是我的代码: class Controller { public ListAction Actions {get; set;}}class Action { public int Id {get; set; public bool IsSelected {get; set;}}ListController controllers = GetControllers();var toAdd = viewModel.PermissionControllers .W
那是我的代码:
class Controller { public List<Action> Actions {get; set;} } class Action { public int Id {get; set; public bool IsSelected {get; set;} } List<Controller> controllers = GetControllers(); var toAdd = viewModel.PermissionControllers .Where(x => x.Actions != null) .Where(x => x.Actions.Where(z => z.IsSelected)) // i Am having problem there .ToList(); 我想获得IEnumerable< int> IsSelected的动作设置为true.没有linq它将是: var ints = new List<int>(); foreach (var controller in controllers) { if (controller.Actions != null) { foreach (var action in Actions) { if (action.IsSelected) ints.Add(action.Id); } } } 不幸的是,我被困在哪里.你能帮助我吗? 解决方法.Where(x => x.Actions.Where(z => z.IsSelected)) // i Am having problem there 你有一个问题,在哪里需要一个bool来确定是否应该包括这个但你提供另一个产生动作而不是一个bool的地方.也许你想要: List<int> actionIdList = viewModel.PermissionControllers .Where(x => x.Actions != null) .SelectMany(x => x.Actions.Where(a => a.IsSelected).Select(a => a.Id)) .ToList(); 如果可以重复并且您不想要它们,请在SelectMany之后使用Distinct. (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |