如何使 HandleErrorAttribute 与 Ajax 一起使用?

发布于 2024-09-10 16:10:57 字数 190 浏览 7 评论 0原文

在我的 ASP.NET MVC 2 应用程序中,我使用 HandleErrorAttribute 在出现未处理异常的情况下显示自定义错误页面,并且除非异常发生在 Ajax.ActionLink 调用的操作中,否则它可以正常工作。在这种情况下什么也不会发生。是否可以使用 HandleErrorAttribute 用“Error.ascx”部分视图的内容更新目标元素?

In my ASP.NET MVC 2 application I use HandleErrorAttribute to display a custom error page in case of unhandled exceptions, and it works perfectly unless the exception happens in an action called by Ajax.ActionLink. In this case nothing happens. Is it possible to use HandleErrorAttribute to update the target element with the contents of an "Error.ascx" partial view?

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焚却相思 2024-09-17 16:10:57

要实现此目的,您可以编写一个自定义操作过滤器:

public class AjaxAwareHandleErrorAttribute : HandleErrorAttribute
{
    public string PartialViewName { get; set; }

    public override void OnException(ExceptionContext filterContext)
    {
        // Execute the normal exception handling routine
        base.OnException(filterContext);

        // Verify if AJAX request
        if (filterContext.HttpContext.Request.IsAjaxRequest())
        {
            // Use partial view in case of AJAX request
            var result = new PartialViewResult();
            result.ViewName = PartialViewName;
            filterContext.Result = result;
        }
    }
}

然后指定要使用的部分视图:

[AjaxAwareHandleError(PartialViewName = "~/views/shared/error.ascx")]
public class HomeController : Controller
{
    public ActionResult Index()
    {
        return View();
    }

    public ActionResult SomeAction() 
    {
        throw new Exception("shouldn't have called me");
    }
}

最后在您的视图中假设您有以下链接:

<%= Ajax.ActionLink("some text", "someAction", new AjaxOptions { 
    UpdateTargetId = "result", OnFailure = "handleFailure" }) %>

您可以使用 handleFailure 函数来更新正确的部分视图分区:

<script type="text/javascript">
    function handleFailure(xhr) {
        // get the error text returned by the partial
        var error = xhr.get_response().get_responseData();

        // place the error text somewhere in the DOM
        document.getElementById('error').innerHTML = error;
    }
</script>

To achieve this you could write a custom action filter:

public class AjaxAwareHandleErrorAttribute : HandleErrorAttribute
{
    public string PartialViewName { get; set; }

    public override void OnException(ExceptionContext filterContext)
    {
        // Execute the normal exception handling routine
        base.OnException(filterContext);

        // Verify if AJAX request
        if (filterContext.HttpContext.Request.IsAjaxRequest())
        {
            // Use partial view in case of AJAX request
            var result = new PartialViewResult();
            result.ViewName = PartialViewName;
            filterContext.Result = result;
        }
    }
}

And then specify the partial view to be used:

[AjaxAwareHandleError(PartialViewName = "~/views/shared/error.ascx")]
public class HomeController : Controller
{
    public ActionResult Index()
    {
        return View();
    }

    public ActionResult SomeAction() 
    {
        throw new Exception("shouldn't have called me");
    }
}

And finally in your view assuming you have the following link:

<%= Ajax.ActionLink("some text", "someAction", new AjaxOptions { 
    UpdateTargetId = "result", OnFailure = "handleFailure" }) %>

You could make the handleFailure function to update the proper div:

<script type="text/javascript">
    function handleFailure(xhr) {
        // get the error text returned by the partial
        var error = xhr.get_response().get_responseData();

        // place the error text somewhere in the DOM
        document.getElementById('error').innerHTML = error;
    }
</script>
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