无法将 SelectListItem 类型隐式转换为 List

Question

视图模型：

public class ReportVM
{
    public WorkSheet worksheet { get; set; }
    public List<WorkReason> workreason { get; set; }
}

控制器：

public ActionResult ReportCreate(int? id)
    {
        var context = new Models.Context();

        var workSheets = context.WorkSheets.FirstOrDefault(ps => ps.WorkSheetId == id);
        var workReasons = context.WorkReasons.Select(w =>
            new SelectListItem()
            {
                Text = w.Name,
                Value = w.WorkReasonId.ToString()
            }
        ).ToList();
        var reportVM = new ReportVM
        {
            workreason = workReasons,
            worksheet = workSheets
        };
        return View(reportVM);
    }

我无法在视图模型中将工作原因从上下文填充到工作原因。任何建议如何解决？

workreason = workReasons - 我在这行有错误： 无法将类型“system.collections.generic.list(System.Web.Mvc.SelectListItem)”隐式转换为“system.collections.generic.list(ProjectE.Models.WorkReason)”

Answer 1

您正在尝试将 workReasons（类型列表）分配给属性 workreason（类型列表）。将您的虚拟机更改为以下内容：

public class ReportVM
{
    public WorkSheet worksheet { get; set; }
    public List<SelectListItem> workreason { get; set; }
}