如何在同一视图中显示两个局部视图？在我的控制器中，我有两个方法，它们都返回partialview。我想把这些方法放在一个视图中。
在我的控制器中，我有这个：
public ActionResult CountCars()
{
var result = this.Data.Cars.All()
.Select(t => new CarsViewModel
{
CategoryName = t.Name,
CategoryCount = t.Category.Count()
});
return PartialView("_ChooseCarsPartialViewLayout", result.ToList());
}
public ActionResult ChooseCity()
{
var view = this.Data.Cities.All()
.Select(x => new CityViewModel
{
CityName = x.Name,
CountCities = x.City.Count()
});
return PartialView("_ChooseCarsPartialViewLayout", view.ToList());
}
_选择CarsPartialViewLayout
@model IEnumerable<Project.ViewModels.City.CityViewModel> <div class="container">
<div class="well">
<div class="row">
<div class="col-md-12">
<div class="form-group">
<h4>?</h4>
<div class="checkbox checkbox-primary">
@for (int i = 0; i < Model.Count(); i++)
{
var cars = Model.ElementAt(i);
<label>@cars.CategoryName <span class="badge">@cars.CategoryCount</span></label>
@Html.RadioButton(cars.CategoryName,
cars.CategoryId,
new
{
id = "radio",
type = "checkbox"
})
}
</div>
</div>
<div class="form-group">
<h4>Hvor vil du jobbe?</h4>
<div class="checkbox checkbox-primary">
@for (int i = 0; i < Model.Count(); i++)
{
var city = Model.ElementAt(i);
<label>@city.CityName <span class="badge">@city.CountCities</span></label>
@Html.RadioButton(city.CityName,
city.CityId,
new
{
id = "radio",
type = "checkbox"
})
}
</div>
</div>
</div>
</div>
</div>
当我运行解决方案时，它只显示一个错误，上面写着。
值不能为null或为空。参数名称：名称
第18行：@Html.RadioButton（cars.CategoryName，
但如果我有两个不同的局部视图，那么它很有效，但我希望在同一个局部视图中有这个。
此外，我在_Layout中有这个Html.Action来呈现部分视图
@Html.Action("ChooseCity", "Home")
有什么建议吗？
问题在于强类型IEnumerable<Project.ViewModels.City.CityViewModel>的局部视图模型，该模型不包含CategoryName的声明。因此，您应该创建一个复合模型，将Cars和Citis返回到局部视图。
public class CompositeModel
{
public IEnumerable<Project.ViewModels.City.CityViewModel> Cars { get; set; }
public IEnumerable<Project.ViewModels.City.CarsViewModel> Cities { get; set; }
}
现在将您的观点更改为
@model CompositeModel
<div class="container">
<div class="well">
<div class="row">
<div class="col-md-12">
<div class="form-group">
<h4>?</h4>
<div class="checkbox checkbox-primary">
@for (int i = 0; i < Model.Cars.Count(); i++)
{
var cars = Model.Cars.ElementAt(i);
<label>@cars.CategoryName <span class="badge">@cars.CategoryCount</span></label>
@Html.RadioButton(cars.CategoryName,
cars.CategoryId,
new
{
id = "radio",
type = "checkbox"
})
}
</div>
</div>
<div class="form-group">
<h4>Hvor vil du jobbe?</h4>
<div class="checkbox checkbox-primary">
@for (int i = 0; i < Model.Cities.Count(); i++)
{
var city = Model.Cities.ElementAt(i);
<label>@city.CityName <span class="badge">@city.CountCities</span></label>
@Html.RadioButton(city.CityName,
city.CityId,
new
{
id = "radio",
type = "checkbox"
})
}
</div>
</div>
</div>
</div>
</div>
由于您有一个名为CityViewModel的ViewModel（尽管我将其命名为RadiosVM，但我会创建一些EditorFor模板。
使用一个复合模型，如他在回答中提到的user1672994，尽管它可以变得更通用和可重用。ViewModel应该封装渲染视图所需的所有数据（也有例外）。
public class RadiosVM
{
public string Name { get; set; }
public IEnumerable<RadioVM> Radios { get; set; }
}
public class RadioVM
{
public string Name { get; set; }
public int Count { get; set; }
}
public class SomePageVM // whatever
{
public RadiosVM CarRadios { get; set; }
public RadiosVM CityRadios { get; set; }
// ... other properties
}
不要为了显示模型而旋转另一个控制器（这是低效的），除非控制器正在做与当前控制器完全无关的事情和/或您计划缓存该视图。
public class SomeController
{
public ActionResult SomePage()
{
var model = new SomePageVM();
model.CarRadios = GetCarRadios;
model.CityRadios = GetCityRadios;
return View(model);
}
private RadiosVM GetCarRadios()
{
var result = new RadiosVM()
{
Name = "Cars",
Radios = this.Data.Cars.All()
.Select(t => new RadioVM
{
CategoryName = t.Name,
CategoryCount = t.Category.Count()
})
.ToList();
}
return result;
}
public RadiosVM ChooseCity()
{
var result = new RadiosVM ()
{
Name = "Cars",
Radios = this.Data.Cities.All()
.Select(t => new RadioVM
{
CategoryName = t.Name,
CategoryCount = t.Category.Count()
})
.ToList();
}
return result;
}
视图：
SomePage.cshtml
@Model SomePageVM
<div class="well">
<div class="row">
<div class="col-md-12">
@Html.EditorFor(m => m.CarRadios)
<div/>
<div class="col-md-12">
@Html.EditorFor(m => m.CityRadios)
<div/>
// ...
/视图/Shared/EditorTemplates/RadiosVM.cshtml或/视图/SomeController/EditorTemplates/RadiosVM.cshtml
@Model RadiosVM
<div class="form-group">
<h4>@Html.DisplayFor(m => m.Name)</h4>
<div class="checkbox checkbox-primary">
@Html.DisplayFor(m => m.Radios)
</div>
/视图/Shared/EditorTemplates/RadioVM.cshtml或/视图/SomeController/EditorTemplates/RadioVM.cshtml
@Model RadioVM
<label>@Html.DisplayFor(m => m.Name)
<span class="badge">@Html.DisplayFor(m => m.Count)</span>
</label>
@Html.RadioButton(model.Name,
model.Id, // You have no code that references this, I don't know...
new
{
id = "radio", // so **ALL** radios are named 'id'?? not valid
type = "checkbox"
})