Ada*_*itt 4 ajax error-handling asp.net-mvc jquery
我正在通过AJAX对一个方法进行ASP.NET MVC调用,错误会引发异常.我希望将异常的消息传递回客户端,我宁愿不必捕获异常.像这样的东西:
[HttpPost]
public ActionResult AddUser(User user) {
if (UserIsValid(user)) {
return Json(new { resultText = "Success!" });
}
throw new Exception("The user was invalid. Please fill out the entire form.");
}
我在我的firebug响应中看到一个HTML页面
<!DOCTYPE html>
<html>
<head>
<title>"The user was invalid. Please fill out the entire form."</title>
.....
我不想被迫使用try catch块来执行此操作.有没有办法自动获取jQuery $(document).ajaxError(function(){}来读取此异常消息？这是不好的做法？我可以覆盖控制器OnException吗？或者我是否必须尝试/ catch并返回JSON？
像这样的东西会很好:
$(document).ajaxError(function (data) {
alert(data.title);
});
您可以使用自定义过滤器执行此操作:
$(document).ajaxError(function(event, jqxhr) {
console.log(jqxhr.responseText);
});
-
[HttpPost]
[CustomHandleErrorAttribute]
public JsonResult Foo(bool isTrue)
{
if (isTrue)
{
return Json(new { Foo = "Bar" });
}
throw new HttpException(404, "Oh noes...");
}
public class CustomHandleErrorAttribute : HandleErrorAttribute
{
public override void OnException(ExceptionContext filterContext)
{
var exception = filterContext.Exception;
var statusCode = new HttpException(null, exception).GetHttpCode();
filterContext.Result = new JsonResult
{
JsonRequestBehavior = JsonRequestBehavior.AllowGet, //Not necessary for this example
Data = new
{
error = true,
message = filterContext.Exception.Message
}
};
filterContext.ExceptionHandled = true;
filterContext.HttpContext.Response.Clear();
filterContext.HttpContext.Response.StatusCode = statusCode;
filterContext.HttpContext.Response.TrySkipIisCustomErrors = true;
}
}
有点受到这篇博文的启发:http://www.prideparrot.com/blog/archive/2012/5/exception_handling_in_asp_net_mvc
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