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这里有一个完整的初学者在C#MVC中需要一些帮助。 我坚持将viewmodel数据传递给PagedList。 我在做什么错?在控制器中,我得到 错误消息:如何将viewmodel传递给PagedList
无法隐式转换类型“PagedList.IPagedList”到“PagedList.IPagedList”。存在明确的转换(您是否缺少演员?)
我已经检查了很多关于此主题的其他帖子,但无法解决我的问题。
这里是我的视图模型:
public partial class NaloziViewModel
{
public int IDNalozi { get; set; }
public int KlijentID { get; set; }
[DisplayFormat(DataFormatString = "{0:dd/MM/yyyy HH:mm}", ApplyFormatInEditMode = true)]
public DateTime VremeStart { get; set; }
[DisplayFormat(DataFormatString = "{0:dd/MM/yyyy HH:mm}", ApplyFormatInEditMode = true)]
public DateTime? VremeKraj { get; set; }
public int KilometrazaStart { get; set; }
public int? KilometrazaKraj { get; set; }
public virtual Klijent Klijent { get; set; }
public int? Page { get; set; }
}
Pagedclass
public class Pagedclass
{
public PagedList.IPagedList<NaloziViewModel> mylist { get; set; }
public int KilometrazaSum { get; set; }
public int VremeSum { get; set; }
}
控制器:
public ActionResult Index(int? page, DateTime? dateFrom, DateTime? dateTo, string klijentIme)
{
int pageSize = 10;
int pageNumber = (page ?? 1);
var naloziFilter = db.Nalozis.Include(n => n.Klijent).OrderByDescending(n => n.IDNalozi).Where(n => n.Obrisan == 0).ToPagedList(pageNumber,pageSize);
if (dateFrom != null && dateTo != null)
{
naloziFilter = naloziFilter.Where(n => n.Klijent.NazivKlijenta.Contains(klijentIme)).Where(n => n.VremeStart >= dateFrom).Where(n => n.VremeKraj <= dateTo).ToPagedList(pageNumber,pageSize);
TimeSpan vremeSum = new TimeSpan();
naloziFilter.Where(x => x.VremeKraj.HasValue).ToList().ForEach(x => vremeSum += x.VremeKraj.Value - x.VremeStart);
var model = new Pagedclass
{
mylist = naloziFilter,
KilometrazaSum = naloziFilter.Sum(n => n.KilometrazaKraj ?? 0) - naloziFilter.Sum(n => n.KilometrazaStart),
VremeSum = (vremeSum.Days*24)+vremeSum.Hours,
};
return View(model);
}
else
{
TimeSpan vremeSum = new TimeSpan();
naloziFilter.OrderByDescending(n => n.IDNalozi).Where(n => n.Obrisan == 0).Where(x => x.VremeKraj.HasValue).ToList().ForEach(x => vremeSum += x.VremeKraj.Value - x.VremeStart);
var model = new Pagedclass
{
mylist = naloziFilter,
KilometrazaSum = naloziFilter.Sum(n => n.KilometrazaKraj ?? 0) - naloziFilter.Sum(n => n.KilometrazaStart),
VremeSum = (vremeSum.Days * 24) + vremeSum.Hours
};
return View(model);
}
}
笔者认为:
@model Pagedclass
@using PagedList;
@using PagedList.Mvc;
....
你从上查询回收集'db.Nalozis'是'Nalozi'不是'NaloziViewModel'的集合。您需要将这些项目投影到'NaloziViewModel'。 – Jasen 2014-10-27 21:17:10
@Jasen 你能帮我解决这个问题吗?不知道应该怎么做。 – 2014-10-28 08:24:17
[这个问题的答案](http://stackoverflow.com/a/5392180/2030565)有一个投影的例子。该问题询问[AutoMapper](https://github.com/AutoMapper/AutoMapper/wiki/Getting-started),这是一个帮助您处理这些投影的工具,因此您无需重复输入这些内容。 – Jasen 2014-10-28 17:46:17