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Editorial Team
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Asked: 2026-06-14T23:57:19+00:00

I have an Action that returns a PartialView: [ChildActionOnly] public ActionResult TabInfo(int id, string

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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);

}

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:

Error executing child request for handler '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 })

According to MS…

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.

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.

What is the best way to handle child action exceptions?

Bottomline: I want to handle the exception and return a custom error page.

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1 Answer

  1. Editorial Team

    In case anyone else comes across this question.

    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");
        }

    }

    Error View

    @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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