[英]How to know if the request is ajax in asp.net in Application_Error()
How to know if the request is ajax in asp.net in Application_Error() 如何在Application_Error()中知道asp.net中的请求是ajax
I want to handle app error in Application_Error().If the request is ajax and some exception is thrown,then write the error in log file and return a json data that contains error tips for client . 我想在Application_Error()中处理应用程序错误。如果请求是ajax并且抛出了一些异常,则在日志文件中写入错误并返回包含客户端错误提示的json数据。 Else if the request is synchronism and some exception is thrown ,write the error in log file and then redirect to a error page.
否则,如果请求是同步并且抛出了一些异常,请在日志文件中写入错误,然后重定向到错误页面。
but now i cant judge which kind the request is . 但现在我无法判断请求是哪种。 I want to get "X-Requested-With" from header ,unfortunately keys of headers don't contain "X-Requested-With" key ,why?
我想从标题中获取“X-Requested-With”,遗憾的是标题的键不包含“X-Requested-With”键,为什么?
Testing for the request header should work. 测试请求标头应该有效。 For example:
例如:
public class HomeController : Controller
{
public ActionResult Index()
{
return View();
}
public ActionResult AjaxTest()
{
throw new Exception();
}
}
and in Application_Error
: 并在
Application_Error
:
protected void Application_Error()
{
bool isAjaxCall = string.Equals("XMLHttpRequest", Context.Request.Headers["x-requested-with"], StringComparison.OrdinalIgnoreCase);
Context.ClearError();
if (isAjaxCall)
{
Context.Response.ContentType = "application/json";
Context.Response.StatusCode = 200;
Context.Response.Write(
new JavaScriptSerializer().Serialize(
new { error = "some nasty error occured" }
)
);
}
}
and then send some Ajax request: 然后发送一些Ajax请求:
<script type="text/javascript">
$.get('@Url.Action("AjaxTest", "Home")', function (result) {
if (result.error) {
alert(result.error);
}
});
</script>
您还可以在包含方法IsAjaxRequest的HttpRequestWrapper中包装Context.Request(类型为HttpRequest)。
bool isAjaxCall = new HttpRequestWrapper(Context.Request).IsAjaxRequest();
You could use this. 你可以用它。
private static bool IsAjaxRequest()
{
return HttpContext.Current.Request.Headers["X-Requested-With"] == "XMLHttpRequest";
}
it is possible to add custom headers in the client side ajax call. 可以在客户端ajax调用中添加自定义标头。 Refer http://forums.asp.net/t/1229399.aspx/1
请参阅http://forums.asp.net/t/1229399.aspx/1
Try looking for this header value in the server. 尝试在服务器中查找此标头值。
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