TryUpdateModel和System.MissingMethodException

时间:2011-05-17 10:24:25

标签: c# asp.net-mvc

在我的Action中,当我使用TryUpdateModel时,我遇到System.MissingMethodException类型的错误。 我在我的控制器的几个地方使用它没有问题,所以这意味着我的模型有问题吗?

在这种情况下,我使用来自我的域的派生类。

public class TypeOperationDisplay : TypeOperation
{
    public TypeOperationDisplay(TypeOperation to)
    {
        Id = to.Id;
        Code = to.Code;
        Libelle = to.Libelle;
        LibelleSaisie = to.LibelleSaisie;
    }

    [ScaffoldColumn(false)]
    public override long Id
    {
        get
        {
            return base.Id;
        }
        set
        {
            base.Id = value;
        }
    }

    [HtmlPropertiesAttribute(MaxLength=255, Size=50, ReadOnly=true)]
    [DisplayName("")]
    public override string Code
    {
        get
        {
            return base.Code;
        }
        set
        {
            base.Code = value;
        }
    }
}

生成TypeOperation。我从这个类派生来添加属性,然后在我的模型中使用它。

public class DetailTypeOperationModel : ViewModelBase
{
    public Int64 IdTypeOperation { get; set; }
    public TypeOperationDisplay TypeOperationDisplay { get; set; }
}

要显示,我使用此动作

    public ActionResult AfficheDetailTypeOperation(Int64 idTypeOperation)
    {
        DetailTypeOperationModel d = new DetailTypeOperationModel
        {
            IdTypeOperation = idTypeOperation,
            TypeOperationDisplay = _srvTypeOperation.Charger(idTypeOperation).ToDisplay()
        };

        return View("GererTypeOperation", d);
    }

检索已发送的数据

    [HttpPost]
    public ActionResult ModifieTypeOperation(Int64 idTypeOperation, FormCollection fc)
    {
        DetailTypeOperationModel d = new DetailTypeOperationModel();
        TryUpdateModel<DetailTypeOperationModel>(d);

        _srvTypeOperation.Modifier(d.TypeOperationDisplay);

        return View("Index", new AdministrationModel());            
    }

就在这个Action上,我在TryUpdateModel上遇到了问题。 通过逐步调试,我看不出为什么这个组件会捕获错误,这个缺少的方法在哪里?

感谢您的帮助:)

1 个答案:

答案 0 :(得分:1)

在DetailTypeOperationModel类中创建TypeOperationDisplay属性虚拟

public class DetailTypeOperationModel : ViewModelBase
{
    public Int64 IdTypeOperation { get; set; }
    public virtual TypeOperationDisplay TypeOperationDisplay { get; set; }
}

我在这里猜测,但我的理论是EF正在尝试创建DetailTypeOperationModel的代理,而不能因为你自己的类属性不是虚拟的。