出现轨迹跟踪错误,但不明白为什么
我正在尝试使用 PayPal IPN 方法。所以我想既然我正在做 asp.net mvc 我可以像这样在我的控制器中创建一个方法视图
public void IPN()
{
// IPN code
}
所以我在本地主机上尝试了这一切,制作了我自己的表单来发布一些 IPN 变量内容,并且工作正常。我将其上传到我的服务器并使用 paypal 的 IPN 模拟器,但它不断返回服务器 500 错误。
因此,我取出了所有代码,基本上您在控制器中看到的只是一个空方法。所以我再次尝试了模拟器,但它再次失败并出现服务器 500 错误。
所以我实际上输入了该控制器方法的 url,然后我得到了这个堆栈跟踪。
[NullReferenceException: Object reference not set to an instance of an object.]
site.com.Controllers.MyTestController.IPN() in MyTestController:2320
lambda_method(ExecutionScope , ControllerBase , Object[] ) +39
System.Web.Mvc.<>c__DisplayClass1.<WrapVoidAction>b__0(ControllerBase controller, Object[] parameters) +17
System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) +17
System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +178
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +24
System.Web.Mvc.<>c__DisplayClassa.<InvokeActionMethodWithFilters>b__7() +53
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +258
System.Web.Mvc.<>c__DisplayClassc.<InvokeActionMethodWithFilters>b__9() +20
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +193
System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +382
System.Web.Mvc.Controller.ExecuteCore() +123
System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +23
System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +7
System.Web.Mvc.MvcHandler.ProcessRequest(HttpContextBase httpContext) +144
System.Web.Mvc.MvcHandler.ProcessRequest(HttpContext httpContext) +54
System.Web.Mvc.MvcHandler.System.Web.IHttpHandler.ProcessRequest(HttpContext httpContext) +7
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +181
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +75
我不确定 MyTestController:2320 是否指的是第 2320 行(因为它不存在)或者什么。
谢谢
I am trying to do PayPal IPN method. So I thought since I am doing asp.net mvc I can just make a method view in my controller like this
public void IPN()
{
// IPN code
}
So I tried this all on local host made my own form to post some IPN variable stuff and it worked fine. I uploaded it to my server and used the IPN simulator from paypal and it kept return a server 500 error.
So I took all the code out and basically had what you see about just a empty method in my controller. So I tried teh simulator again and it failed again with a server 500 error.
So I went and actually typed in my url to that controller method and I get this stack trace.
[NullReferenceException: Object reference not set to an instance of an object.]
site.com.Controllers.MyTestController.IPN() in MyTestController:2320
lambda_method(ExecutionScope , ControllerBase , Object[] ) +39
System.Web.Mvc.<>c__DisplayClass1.<WrapVoidAction>b__0(ControllerBase controller, Object[] parameters) +17
System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) +17
System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +178
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +24
System.Web.Mvc.<>c__DisplayClassa.<InvokeActionMethodWithFilters>b__7() +53
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +258
System.Web.Mvc.<>c__DisplayClassc.<InvokeActionMethodWithFilters>b__9() +20
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +193
System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +382
System.Web.Mvc.Controller.ExecuteCore() +123
System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +23
System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +7
System.Web.Mvc.MvcHandler.ProcessRequest(HttpContextBase httpContext) +144
System.Web.Mvc.MvcHandler.ProcessRequest(HttpContext httpContext) +54
System.Web.Mvc.MvcHandler.System.Web.IHttpHandler.ProcessRequest(HttpContext httpContext) +7
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +181
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +75
I am not sure if MyTestController:2320 is refering to line 2320(because it does not exist) or what.
Thanks
如果你对这篇内容有疑问,欢迎到本站社区发帖提问 参与讨论,获取更多帮助,或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱,如果其他用户或者作者回复了您的评论,将不能在第一时间通知您!
发布评论
评论(2)
右侧的数字是编译代码的偏移量,因此它们不会指向任何源代码行号。
在这种情况下,我要做的是将某种日志记录到代码中,以便我可以知道代码中的何处引发异常。根据您对将代码上传到的服务器的访问权限,您也许能够创建日志文件或事件日志等,并使用跟踪语句:
这样做将帮助您发现代码中发生故障的位置。
Those numbers on the right are offsets into the compiled code, so they won't point to any source code line numbers.
What I'd do in this scenario is to put some kind of logging into the code, so that I can know where in the code the exception is raised. Depending on what access you have to the server you uploaded the code to, you might be able to create a log file, or event log, etc, and use Trace statements:
Doing this would help you spot where in the code the failure is happening.
如果不查看代码,我们无法确定 NullReferenceException 发生在哪里。
但是,根据我自己设置 IPN 的经验,我认为您很可能引用空
string
对象。例如:只需确保您没有调用任何对象上的任何方法、属性,而不确保它们不为空。
Without seeing the code we can't be sure where the
NullReferenceException
happening.But, having experience setting up an IPN myself, I think you are most likely referencing a null
string
object. For example :Just make sure you are not calling any methods, properties on any object without making sure they're not null.