c# - 无法将类型 'System.Collections.Generic.List<AnonymousType#1>' 隐式转换为 'System.Collections.Generic.List<FirstApp.Model.TeamDetails>

Question

我收到此错误

Cannot implicitly convert type System.Collections.Generic.List<AnonymousType#1> to System.Collections.Generic.List<FirstApp.Model.TeamDetails>

我的代码有什么问题吗？

这是我的代码

TeamDetails类

public class TeamDetails
{
    [Key]
    public int TeamId { get; set; }
    public string TeamName { get; set; }
    public string Description { get; set; }
    public int? UserCount { get; set; }
}

View 模型

public class ViewTeamList
{
    public List<TeamDetails> TeamNext { get; set; }
}

Controller

public ActionResult Next(int dataid)
{
    ViewTeamList viewTeamList = new ViewTeamList();
    var a = from t in tDbContext.Teams
            join u in tDbContext.Users on t.TeamId equals u.TeamId into g
            where t.Deleted != true
            select new { TeamId= t.TeamId,TeamName = t.TeamName, Description = t.Description, UserId = g.Count() };

    var next = a.OrderBy(t1 => t1.TeamId).Where(t1 => t1.TeamId > dataid).FirstOrDefault();
    viewTeamList.TeamNext = a.ToList(); 
    return PartialView("_ViewTeamDetails", viewTeamList);
}

我无法将此值分配给

viewTeamList.TeamNext = a....; 

Answer 1

这会构造一个匿名类型而不是 TeamDetails

select new { TeamId= t.TeamId,TeamName = t.TeamName, Description = t.Description, UserId = g.Count() }

您应该将其更改为以下内容

select new TeamDetails { TeamId = t.TeamId, TeamName = t.TeamName, Description = t.Description, UserCount = g.Count() }

所以a.ToList()将是 List<FirstApp.Model.TeamDetails>