无法将类型 System.Collections.Generic.List<>' 隐式转换为 'System.Collections.Generic.List<>

Question

我是 MVC4 的新手，我想实现 WebGrid，在为 model.activity 检索数据时，它工作正常。为了澄清起见，我正在组合两个表来获取数据。

这里显示的错误是这样的 无法将类型“System.Collections.Generic.List”隐式转换为“System.Collections.Generic.List”

请帮我解决这个问题。提前致谢

public class MyViewModel
{
    public List<Tbl_Activity> activity;
    public List<Tbl_Clarification> clarification;
}

  public class ClarificationEntities
{
    public int ClrNo { get; set; }
    public Nullable<int> DailyReportID { get; set; }
    public string ReportingMgrComment { get; set; }
    public Nullable<System.DateTime> CreatedOn { get; set; }
    public string StaffComment { get; set; }
    public Nullable<int> CreatedBy { get; set; }
    public string Name { get; set; }
}

我正在向模型中添加数据以在 WebGrid 中显示

 MyViewModel model = new MyViewModel();
 model.activity = db.Tbl_Activity.Where(x => x.DailyReportID == driD).ToList();
 model.clarification = (from c in db.Tbl_Clarification
                        join u in db.Tbl_Users on c.CreatedBy equals u.CreatedBy
                        where c.DailyReportID == did
                        select new ClarificationEntities
                         {
                           ClrNo = c.ClrNo,     
                           ReportingMgrComment = c.ReportingMgrComment,
                           StaffComment = c.StaffComment,
                           DailyReportID=c.DailyReportID,
                           Name=u.Name
                          }).ToList();
  return View(model);

Answer 1

MyViewModel 的 clarification 字段类型错误...

改用以下方法

public class MyViewModel
{
    public List<Tbl_Activity> activity;
    public List<ClarificationEntities> clarification;
}