为什么ASP.NET MVC 3异常被“处理”两次？ [英] Why are ASP.NET MVC 3 exceptions being 'handled' twice?
问题描述
我使用下面的代码实现了异常处理。我不知道为什么调用视图两次。
I have implemented exception handling using below code. I do not know why it is calling view twice.
Basecontroller
Basecontroller
public class BaseController : Controller
{
protected override void OnException(ExceptionContext filterContext)
{
if (filterContext.HttpContext.IsCustomErrorEnabled)
{
filterContext.ExceptionHandled = true;
if (filterContext.Exception.GetType() == typeof(ArgumentOutOfRangeException))
{
this.View("OutOfRange").ExecuteResult(this.ControllerContext);
}
else
{
this.View("Error").ExecuteResult(this.ControllerContext);
}
}
base.OnException(filterContext);
}
}
HomeController
HomeController
public class HomeController : BaseController
{
public ActionResult Exception2()
{
throw (new ArgumentOutOfRangeException());
}
public ActionResult Exception3()
{
throw (new Exception());
}
}
错误查看（仅限共享文件夹）
Error View (Shared folder only)
@model System.Web.Mvc.HandleErrorInfo
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<title>Error</title>
</head>
<body>
<h2>
Sorry, an error occurred while processing your request.
</h2>
<h3>
@if (Model != null)
{
<p>@Model.Exception.GetType().Name<br />
thrown in @Model.ControllerName @Model.ActionName</p>
<br />
@Model.Exception
}
</h3>
</body>
</html>
OutOfRange视图（仅共享文件夹）
OutOfRange view (Shared folder only)
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<title>OutOfRange Exception</title>
</head>
<body>
<div>
<h3>
@if (Model != null)
{
<p>@Model.Exception.GetType().Name<br />
thrown in @Model.ControllerName @Model.ActionName</p>
<br />
@Model.Exception
}
</h3>
</div>
</body>
</html>
执行URL： http：// [domainName] / Home / Exception2
这里工作正常。
执行URL： http：// [domainName] / Home / Exception3
这里不正常。您可以看到对不起，处理您的请求时发生错误。来了两次当我使用上面的URL调试应用程序时，错误视图被调用两次（第一次模型为null，第二次模型包含一些值）。我可以知道我的实现有什么问题吗？
推荐答案
事情要尝试：
- 删除如果存在，则从
Global.asax中的默认HandleError全局操作过滤器属性。当您创建一个新的ASP.NET MVC 3应用程序时，默认模板将其注册到RegisterGlobalFilters方法中。所以注释掉注册该属性的行。 -
在web.config中启用自定义错误：
- Remove the default
HandleErrorglobal action filter attribute from yourGlobal.asaxif it is present. When you create a new ASP.NET MVC 3 application the default template registers it inside theRegisterGlobalFiltersmethod. So comment out the line which registers this attribute. Enable custom errors in your web.config:
<customErrors mode="On" />
更新：
UPDATE:
如果要将模型传递给 Error.cshtml 视图（因为它很强您可以执行以下操作：
If you want to pass a model to the Error.cshtml view (as it is strongly typed to HandleErrorInfo) you could do the following:
else
{
string controllerName = filterContext.RouteData.GetRequiredString("controller");
string actionName = filterContext.RouteData.GetRequiredString("action");
var model = new HandleErrorInfo(filterContext.Exception, controllerName, actionName);
var result = new ViewResult
{
ViewName = "Error",
ViewData = new ViewDataDictionary<HandleErrorInfo>(model)
};
filterContext.Result = result;
}
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