使用 Html.RenderAction 将模型从视图传递到控制器会导致模型为空

Passing model from view to controller using Html.RenderAction results in model being null

我有以下型号:

public class Foo
{
    public List<Employee> Employees{ get; set; }
    public List<Company> Companies{ get; set; }
    public List<Admin> Admins{ get; set; }
}

然后我有我的控制器动作:

public ActionResult Index()
{
    Foo model = GetFooFromSomewhere();
    return PartialView("Index", model);
} 

public ActionResult Employees(List<Employee> model)
{
    return PartialView("Employees", model);
}

public ActionResult Companies(List<Company> model)
{
    return PartialView("Companies", model);
}

public ActionResult Admins(List<Admin> model)
{
    return PartialView("Admins", model);
}

那我有我的看法

Index.cshml:

@model Foo
@if(Model.Employees.Count > 0)
{
    @{Html.RenderAction("Employees", "Config", Model.Employees);}
}
@if(Model.Companies.Count > 0)
{
    @{Html.RenderAction("Companies", "Config", Model.Companies);}
}
@if(Model.Admins.Count > 0)
{
    @{Html.RenderAction("Admins", "Config", Model.Admins);}
}

Employees.cshtml:

@model List<Employee>

//Display model here

Companies.cshtml

@model List<Company>

//Display model here

Admins.cshtml

@model List<Admin>

//Display model here

如您所见,我使用 Index.cshtml 获取包含多个列表的对象。这是因为如果在 list/s 中找不到项目,我需要隐藏操作。但是,当我再次使用@Html.RenderAction(...) 将它们传递给控制器​​时,当我期待一个列表时,我在控制器操作中得到了空值。为什么?

您必须将初始化的模型传递给控制器​​中的 Index 视图。

public ActionResult Index()
{
   Foo model = GetFooFromSomewhere();
   return PartialView("Index", model);
} 

这样试试: 控制器:

public ActionResult Admins(List<Admin> m)
{
    return PartialView("Admins", m);
}

查看:

@{Html.RenderAction("Admins", "Config", new { m = Model.Admins });}