在的Razor视图foreach循环大会未引用编译错误 [英] Assembly Not Referenced compilation error in foreach loop in Razor view

问题描述

编辑：我已经检查并尝试了很多其他的大会未引用的SE发现的问题，但我还没有发现有很多处理什么应该是一个内置组件（ System.Collections中.Generic.List＆LT; T＆GT; ）。这使得难以手动添加或删除的基准等。

我试图建立从API响应PartialView。我已确认的反应是正确的，良好的，我的对象是正确建立，但是当我产生局部视图，代替显示编译错误。

 编译器错误信息：CS0012：类型'System.Collections.Generic.List`1＆LT; T0＆GT;'在未引用的组件被限定。您必须添加到程序集的引用System.Collections中，版本= 4.0.0.0，文化=中性公钥= b03f5f7f11d50a3a。
 

下面是的Razor视图：

  @using OpsComponent
@model OpsComponent.ComponentData＆LT; D​​IV CLASS =行＆GT;
    ＆LT; D​​IV CLASS =COL-MD-6＆GT;
        ＆LT; UL类=列表组＆GT;
            @foreach（在Model.Metrics数据度量）
            {
                ＆LT;李班=列表组项＆GT;
                    ＆LT;跨度类=徽章＆GT; @ metric.Value＆LT; / SPAN＆GT;
                    @ metric.Key＆LT; BR /＆GT;
                ＆LT; /李＆GT;
            }        ＆LT; / UL＆GT;
    ＆LT; / DIV＆GT;
＆LT; / DIV＆GT;
 

这是数据类的定义：

 公共类数据
    {
        公共字符串键{获得;组; }
        公共字符串值{获得;组; }
        公共字符串源{搞定;组; }
        公共状态状态{搞定;组; }    }
 

如果状态是一个枚举。我在调试该Model对象是正确的，它传递给PartialView之前就形成遏制，但不是一个正确的布局，我得到的服务器错误的屏幕和一个500响应。

在该行 @foreach（在Model.Metrics数据度量）

行动code的完整性：

 公众的ActionResult ComponentDetail（字符串ID）
        {
            VAR数据= Client.GetComponentData（id.De codeBase64ToString（））;
            变种partialViewResult = PartialView（_ ComponentDetail数据）;
            返回partialViewResult;
        }
 

解决方案

我已经想通了，这是过分地简单。我仍然不知道为什么，这是必要的，但增加了新的组装标记的web.config 似乎有解决了这个问题。我加了标签是在＆LT;编译＆GT; 标记，如下：

 ＆LT;＆集会GT;
    ＆LT;添加组件=System.Collections中，版本= 4.0.0.0，文化=中性公钥= b03f5f7f11d50a3a/＆GT;
＆LT; /组件＆GT;
 

很简单，但解决了错误，并认为现在呈现正确。

EDIT: I have checked and attempted a lot of the other Assembly Not Referenced issues found on SE, but I haven't found many dealing with what should be a built-in assembly (System.Collections.Generic.List<t>). This makes it difficult to manually add or remove the reference etc.

I am trying to build a PartialView from an API response. I have confirmed the response is correct and well-formed, my objects are being built correctly, but when I generate the Partial View, a Compilation Error is instead shown.

Compiler Error Message: CS0012: The type 'System.Collections.Generic.List`1<T0>' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Collections, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'.

Here is the Razor view:

@using OpsComponent
@model OpsComponent.ComponentData

<div class="row">
    <div class="col-md-6">
        <ul class="list-group">
            @foreach (Data metric in Model.Metrics)
            {
                <li class="list-group-item">
                    <span class="badge">@metric.Value</span>
                    @metric.Key<br/>
                </li>
            }

        </ul>
    </div>
</div>

And here is the Data class definition:

public class Data
    {
        public string Key { get; set; }
        public string Value { get; set; }
        public string Source { get; set; }
        public Status Status { get; set; }

    }

Where Status is an enum. I have checked in Debugging that the Model object is correct and well-formed before it is passed to the PartialView, but instead of a correct layout, I get the Server Error screen and a 500 response.

at the line @foreach (Data metric in Model.Metrics)

Action code for completeness:

public ActionResult ComponentDetail(string id)
        {
            var data = Client.GetComponentData(id.DecodeBase64ToString());
            var partialViewResult = PartialView("_ComponentDetail", data);
            return partialViewResult;
        }

解决方案

I have figured it out, and it was devilishly simple. I still don't know why this is necessary, but adding a new assembly tag to web.config seems to have resolved this issue. The tag I added was under the <compilation> tag and as follows:

<assemblies>
    <add assembly="System.Collections, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
</assemblies>

Simple, but has resolved the error and the view now renders correctly.

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