如何妥善处理孩子的异常行为 [英] How to properly handle child action exceptions
问题描述
我有一个返回PartialView的动作：
I have an Action that returns a PartialView:
[ChildActionOnly]
public ActionResult TabInfo(int id, string tab)
{
ViewBag.Jobid = id;
ViewBag.Tab = tab;
var viewModel = _viewModelManager.GetViewModel(tab, id);
return
PartialView(string.Format("~/Views/{0}/Index.cshtml", tab), viewModel);
}
的 _viewModelManager 返回从字典视图。如果一个用户请求不那么exsist一个 KeyNotFound 会抛出异常，标签然而，在我看来，我得到了以下异常：
The _viewModelManager returns a view from a Dictionary. If a user requests a tab that does not exsist then a KeyNotFound Exception will be thrown, however, In my view I get the following Exception:
执行的处理子请求错误System.Web.Mvc.HttpHandlerUtil + ServerExecuteHttpHandlerAsyncWrapper
@using MyApplication.UI.Helpers.Html
@model MyApplication.UI.Models.MyJobModel
@{
ViewBag.Title = "Details";
}
<p>@Model.Blah</p>
...
*@ HttpException occurs here -- renders default error view *@
@Html.Action("TabInfo", new { id = ViewBag.Jobid, tab = ViewBag.Tab })
<一个href=\"http://msdn.microsoft.com/en-us/library/system.web.mvc.html.childactionextensions%28v=vs.98%29.aspx\"相对=nofollow>据MS ...
这是一个孩子的动作方法的HandleErrorAttribute属性，如果在孩子行动本身发生异常会被忽略。因此，孩子应该采取行动处理自己的异常。如果一个孩子行动的AuthorizeAttribute应用属性，该属性将执行，并返回一个HTTP 401未经授权状态code。
The HandleErrorAttribute attribute on a child action method is ignored if an exception occurs in the child action itself. Therefore, a child action should handle its own exceptions. If a child action has an AuthorizeAttribute attribute applied, the attribute will execute and return an HTTP Unauthorized 401 status code.
我不能使用的此 [的HandleError（ExceptionType = typeof运算（KeyNotFoundException），查看=myError）] 和使用的try / catch我不能重定向要么是因为孩子的行为重定向不被支持。
I can't user this [HandleError(ExceptionType = typeof(KeyNotFoundException), View="myError")] and I can't redirect using a try/catch either because redirects for child actions are not supported.
什么是处理孩子的行动异常的最好方法？
底线：我要处理的异常，并返回一个自定义错误页
Bottomline: I want to handle the exception and return a custom error page.
推荐答案
在情况下，任何人都遇到这个问题。
In case anyone else comes across this question.
我结束了使用try / catch块捕捉KeyNotFound例外。我记录错误，然后将用户重定向到一个ErrorView。在错误观点我将用户重定向到相应的视图使用JavaScript。
I ended up using a try/catch block to catch the KeyNotFound exception. I log the error and then redirect the user to an ErrorView. In the error view I redirect the user to the appropriate view using javascript.
[ChildActionOnly]
public ActionResult TabInfo(int id, string tab, string jobno)
{
try
{
var viewModel = _viewModelManager.GetViewModel(tab, id);
ViewBag.Jobid = id;
ViewBag.Tab = tab;
return PartialView(string.Format("~/Views/{0}/Index.cshtml", tab), viewModel);
}
catch (Exception ex)
{
return View("Error");
}
}
错误查看
@model System.Web.Mvc.HandleErrorInfo
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<script type="text/javascript">
window.location.href = '@Url.Content("~/400.htm")';
</script>
</body>
</html>
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