如何编写嵌套分组数据的类型 C#

Question

我对数据进行了分组，我想将这些数据与模型一起发送到视图。如何将属性写入视图模型工作计划类public class WorkPlan:IEntity{    public int WorkPlanId { get; set; }    public int PlanNumber { get; set; }    public string Day { get; set; }    public string Lesson { get; set; }    public string Description { get; set; }    public bool IsActive { get; set; }}工作计划视图模型public class WorkPlanViewModel:BaseViewModel{    public List<WorkPlan> WorkPlans { get; set; }    public WorkPlan WorkPlan { get; set; }}行动public IActionResult Index(){    WorkPlanViewModel model=new WorkPlanViewModel();    model.Message=new Message();    var allWorkPlan = workPlanService.GetAll();    var groupPlan = allWorkPlan.GroupBy(p => p.PlanNumber)                    .Select(p => new {PlanNumber=p.Key, Day= p.GroupBy(b => b.Day).ToList() } ).ToList();    return View(model);}groupPlan 是我的分组数据

Answer 1

您可以创建一个反映该匿名类型的类，并将其作为属性添加到您的视图模型中。

控制器/操作代码 - 请注意new GroupPlan以下代码Select

var vm = new MyViewModel();

vm.GroupPlans = allWorkPlan.GroupBy(p => p.PlanNumber)

                    .Select(p => new GroupPlan { PlanNumber = p.Key, Day = p.GroupBy(b => b.Day).ToList() }).ToList();

群组计划类

public class GroupPlan

{

    public int PlanNumber { get; set; }

    public List<IGrouping<string, WorkPlan>> Day { get; set; }

}

视图模型类

public class MyViewModel

{

    public List<GroupPlan> GroupPlans { get; set; } 

}