PartialView渲染无法在主页上呈现，抛出HttpExceptionn

I'm learning MVC and I'm trying to render a Partialview on Home Page. I'm getting following error :

我正在学习MVC,我正在尝试在主页上呈现部分视图。我收到以下错误:

"HttpException"

My very simple model is as follows:

我非常简单的模型如下:

public class simpleModel
{
    public int id { get; set; }
    public string Name { get; set; }
}

Controller:

public ActionResult ShowNames()
{
    UsersContext db = new UsersContext();               
    return PartialView(db.SimpleModels.ToList());
}

partial view:

@model List<MvcApplication1.Models.simpleModel>
@if (Model != null)
{
   <ul>
      @foreach (var item in Model)
      {
        <li>@item.Name</li>
      }
</ul>
}

Home page where I want my partial view to render is

我想要部分视图渲染的主页是

@{
    ViewBag.Title = "Home Page";
}
@section featured {
    <section class="featured">
        <p>To learn more about ASP.NET MVC visit </p>
    </section>
}
@{
    Html.RenderAction("ShowNames", "Simple");
}

3 个解决方案

#1

Your ShowNames() method returns a collection of simpleModel items to the view (as in db.SimpleModels.ToList()) but your partial declares the model as a single simpleModel onject. That would throw and exception, as would your attempt to iterate a single object using the foreach loop.

您的ShowNames()方法将simpleModel项的集合返回给视图(如在db.SimpleModels.ToList()中),但您的partial将模型声明为单个simpleModel onject。这会抛出异常,就像你尝试使用foreach循环迭代单个对象一样。

Change the partial view model declaration to

将局部视图模型声明更改为

@model List<MvcApplication1.Models.simpleModel>

but since <li>name</li> would just return the text "name" (or assuming its actually <li>@name</li> then it would return the text "MvcApplication1.Models.simpleModel" unless you have overridden the ToString() method of simpleModel), so you need to access a property of the object

但由于

name 只会返回文本“name”(或假设它实际上是

@name 然后它会返回文本“MvcApplication1.Models.simpleModel”,除非你已经覆盖了SimpleSodel的ToString()方法,因此需要访问该对象的属性

<ul>
    @foreach (var item in model)
    {
        <li>@item.Name</li>
    }
</ul>

#2

Your model might be null i.e its not having any data. So, you should put a check before the foreachloop

您的模型可能为空,即没有任何数据。所以,你应该在foreachloop之前检查一下

@model List

@if(model != null)
{
<ul>
    @foreach (var item in model)
    {
        <li>@item.Name</li>
   }
</ul>
}

#3

Try adding [ChildActionOnly] attribute to your ShowNames method.

尝试将[ChildActionOnly]属性添加到ShowNames方法。

#1