Hi!
I want to set up an exception handler in my asp.net page which handles all
unhandled exception. When the exception is trapped I want to assign its
message to a label. How can I do this?
I have tryied to do like this:
Protected Sub Page_Error(ByVa l sender As Object, ByVal e As
System.EventArg s) Handles Me.Error
Label.text = Server.GetLastE rror().Message( )
Server.ClearErr or()
End Sub
The exception is trapped but I got a blank page. Why is that? Is it
possible to do what i´m trying to do? 3 2810
Hi,
the problem most likely is that the error causes the page to stop the
execution and just to raise the error handler up (processing does not
continue to rendering etc), therefore it is visible like this.
If you want to let the execution continue, you'd need to catch exceptions at
blobk/method level.
--
Teemu Keiski
ASP.NET MVP, AspInsider
Finland, EU http://blogs.aspadvice.com/joteke
"Clas" <no****@co.se > wrote in message
news:AA******** *************** ***********@mic rosoft.com... Hi! I want to set up an exception handler in my asp.net page which handles all unhandled exception. When the exception is trapped I want to assign its message to a label. How can I do this?
I have tryied to do like this:
Protected Sub Page_Error(ByVa l sender As Object, ByVal e As System.EventArg s) Handles Me.Error Label.text = Server.GetLastE rror().Message( ) Server.ClearErr or() End Sub
The exception is trapped but I got a blank page. Why is that? Is it possible to do what i´m trying to do?
Well, I'm not sure why your Label isn't working, but I do have a comment
about the approach in general. Once this goes to production, I'd suggest
not doing this. The reason is that you shouldn't show exception information
to an end user. If the end user is an attacker (malicious) then they can
use that information against you. Instead, you should only ever show vague
information that "there was some sort of problem". Of course, log that in
your global.asax's Application_Err or method so an admin has all the info,
but don't give it to your users.
-Brock
DevelopMentor http://staff.develop.com/ballen Hi! I want to set up an exception handler in my asp.net page which handles all unhandled exception. When the exception is trapped I want to assign its message to a label. How can I do this? I have tryied to do like this:
Protected Sub Page_Error(ByVa l sender As Object, ByVal e As System.EventArg s) Handles Me.Error Label.text = Server.GetLastE rror().Message( ) Server.ClearErr or() End Sub The exception is trapped but I got a blank page. Why is that? Is it possible to do what i´m trying to do?
Hi, I would try doing a Try...Catch...E nd Try method. your catch could be:
cath e as exception
label.text ="text"
"Brock Allen" wrote: Well, I'm not sure why your Label isn't working, but I do have a comment about the approach in general. Once this goes to production, I'd suggest not doing this. The reason is that you shouldn't show exception information to an end user. If the end user is an attacker (malicious) then they can use that information against you. Instead, you should only ever show vague information that "there was some sort of problem". Of course, log that in your global.asax's Application_Err or method so an admin has all the info, but don't give it to your users.
-Brock DevelopMentor http://staff.develop.com/ballen Hi! I want to set up an exception handler in my asp.net page which handles all unhandled exception. When the exception is trapped I want to assign its message to a label. How can I do this? I have tryied to do like this:
Protected Sub Page_Error(ByVa l sender As Object, ByVal e As System.EventArg s) Handles Me.Error Label.text = Server.GetLastE rror().Message( ) Server.ClearErr or() End Sub The exception is trapped but I got a blank page. Why is that? Is it possible to do what i´m trying to do? This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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