ASP.Net MVC4 错误处理何时起作用？

Question

我不明白为什么 MVC4 内置的错误处理是这样的。 . .脆弱？

有这个代码：

public class FilterConfig
{
    public static void RegisterGlobalFilters(GlobalFilterCollection filters)
    {
        filters.Add(new HandleErrorAttribute());
    }
}

并且在 web.config（system.web 部分）中有这个条目：

<customErrors mode="On"></customErrors>

还有一个如下所示的 Error.cshtml：

@model System.Web.Mvc.HandleErrorInfo
@{
    ViewBag.Title = "Error";
}
<div class="container form-container">
    <div class="row">
    <div class="col-xs-6 col-lg-5 col-lg-offset-1">
        <h1 class="error">Error</h1>
        <h2 class="error">An Error Has Occurred</h2>
        <p>We apologize for the inconvenience.</p>
        @{
        if (Model != null && Model.Exception != null)
        {
            <h3>Exception</h3>
            @if (!string.IsNullOrWhiteSpace(Model.Exception.Message))
            {
            <p>@Model.Exception.Message</p>
            }
            else
            {
            <p>No Excepetion Message was provided.</p>
            }
            @if (!string.IsNullOrWhiteSpace(Model.Exception.StackTrace))
            {
            <h3>Stack Trace</h3>
            <p>@Model.Exception.StackTrace</p>
            }
        }
        else
        {
            <h3>Exception was null</h3>
        }
        }
    </div>
    </div>
</div>

当我试图强制这样的错误时：

[HttpGet]
public ActionResult Create()
{
    throw new ApplicationException("Testing");
    return View();
}

我得到了黄屏死机：

Server Error in '/' Application.

Runtime Error 
  Description: An application error occurred on the server. The current custom error settings for this application prevent the details of the application error from being viewed. 

Details: To enable the details of this specific error message to be viewable on the local server machine, please create a <customErrors> tag within a "web.config" configuration file located in the root directory of the current web application. This <customErrors> tag should then have its "mode" attribute set to "RemoteOnly". To enable the details to be viewable on remote machines, please set "mode" to "Off".



<!-- Web.Config Configuration File -->

<configuration>
    <system.web>
    <customErrors mode="RemoteOnly"/>
    </system.web>
</configuration>


Notes: The current error page you are seeing can be replaced by a custom error page by modifying the "defaultRedirect" attribute of the application's <customErrors> configuration tag to point to a custom error page URL.



<!-- Web.Config Configuration File -->

<configuration>
    <system.web>
    <customErrors mode="On" defaultRedirect="mycustompage.htm"/>
    </system.web>
</configuration>

谁能告诉我我错过了什么？它必须是一些基本的东西。作为记录，我尝试的第一个测试成功了，从那以后我就无法让它工作。我不知道我为打破它所做的任何改变。

Answer 1

我想通了。它是 Razor 代码块中 if 语句前面的“@”。语法不好。