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QAIX > ColdFusion > On Error Resume Next 24 September 2008 03:44:27

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On Error Resume Next

Asim Manzur 24 September 2008 03:44:27
 In ASP we use

On Error Resume Next

What is the replacement statement in Coldfusion

<cftry>
-------------------­--------
<cfcatch type="exception">

</cfcatch>

</cftry>

I mean i have to cut/paste codes in both blocks, cftry and cfcatch?
So, if error comes it will still run the codes in cfcatch block.

What is the right way to do that?


Kind Regards,
Asim Manzur
System Administrator/Devel­oper



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Dave Watts 11 June 2004 18:20:57 permanent link ]
 
In ASP we use >
On Error Resume Next>
What is the replacement statement in Coldfusion>
<cftry>> -------------------­--------> <cfcatch type="exception">>
</cfcatch>>
</cftry>>
I mean i have to cut/paste codes in both blocks, cftry and cfcatch?> So, if error comes it will still run the codes in cfcatch block. >
What is the right way to do that?

There is no exact equivalent to "On Error Resume Next" in CFML. I would
argue that this is a good thing - I think that "On Error Resume Next" is
terrible!

Instead, we have exception handling. For any block of code that you expect
might fail, you can use CFTRY/CFCATCH to build an exception handler. In
addition to being able to continue running code, you can actually respond to
the specific problem encountered.

In your case, if you simply want to continue running code, you could do
this:

<cftry>

... problematic code goes here ...

<cfcatch type="any">
<!--- do nothing --->
</cfcatch>

</cftry>

Dave Watts, CTO, Fig Leaf Software
http://www.figleaf.­com/
phone: 202-797-5496
fax: 202-797-5444


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Asim Manzur 11 June 2004 19:53:43 permanent link ]
 I Have already tried it in that way, but it stops running the code.

in the debugging info it shows the error
Exceptions

12:49:52.052 - Object Exception - in C:\CFusionMX\wwwroo­t\dev\dundas\dundas.­cfm : line 3
An exception occurred when executing a Com method.

is this component documentation it says that some server will through exceptions, so use On Error Resume Next.

below is my codes

<cftry>
<cfobject type="com" class="Dundas.Uploa­d.2" action="create" name="objUpload">
<CFset objUpload.Save("c:\­temp")>
<!--- If Err.Number <> 0 Then
Response.Redirect "Error.asp"
Else
<cfif InStr(1,objUploaded­File.ContentType,"oc­tet-stream")>
<cfset objUploadedFile.Del­ete()>
</cfif>
--->
<cfoutput><br>The name of the form item is: #objFormItem#
<br>The value of the form item is: #objFormItem.Value#­<br>"
</cfoutput>
<cfSet objUpload = "Nothing">
<cfcatch>
<cfreturn false>
</cfcatch>
</cftry>


Thanks
Asim>> In ASP we use >
There is no exact equivalent to "On Error Resume Next" in CFML. I would>argue that this is a good thing - I think that "On Error Resume Next" is>terrible!>
Instead, we have exception handling. For any block of code that you expect>might fail, you can use CFTRY/CFCATCH to build an exception handler. In>addition to being able to continue running code, you can actually respond to>the specific problem encountered.>
In your case, if you simply want to continue running code, you could do>this:>
<cftry>>
... problematic code goes here ...>
<cfcatch type="any">><!--- do nothing --->></cfcatch>>
</cftry>>
Dave Watts, CTO, Fig Leaf Software>http://www­.figleaf.com/>phone:­ 202-797-5496>fax: 202-797-5444

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Add comment
Bob.Needler@Yahoo.Com 6 March 2006 19:16:04 permanent link ]
 I know On Error Resume Next is generally considered lazy. But can
someone tell me why the resume next in Exit_Handler does not seem to
work? It generates the typical unhandled runtime error message from
Access. If I comment out the 1st On Error Resume Next and the x = 1 /
0 on the next line there is no difference, i.e. ther same unhandled
error on the same line. I included these 2 lines of code to
demonstrate that On Error Resume Next does work in some cases. Anyone
know why its "not working" in Exit_Handler?


Private Sub Command44_Click()

Dim x%
On Error Resume Next
x = 1 / 0
On Error GoTo Error_Handler
x = 1 / 0

Exit_Handler:
On Error Resume Next
x = 1 / 0 'runtime error here is not ignored (i.e. not "skipped")
by the resume next
On Error GoTo 0
Exit Sub

Error_Handler:
GoTo Exit_Handler

End Sub

Add comment
Matthew Wells 6 March 2006 20:30:41 permanent link ]
 The error handler can only handle one error at a time. So when you
triggered the first error, there is still an active error when you triggered
the error in Exit_handler. You must first "handle' the error in err_handler
by using the "resume" statement. If you change "goto exit_handler" with
"resume Next" you'll see it works.




<bob.needler@yahoo.­com> wrote in message
news:1141661764.810­986.309510@j52g2000c­wj.googlegroups.com.­..> I know On Error Resume Next is generally considered lazy. But can> someone tell me why the resume next in Exit_Handler does not seem to> work? It generates the typical unhandled runtime error message from> Access. If I comment out the 1st On Error Resume Next and the x = 1 /> 0 on the next line there is no difference, i.e. ther same unhandled> error on the same line. I included these 2 lines of code to> demonstrate that On Error Resume Next does work in some cases. Anyone> know why its "not working" in Exit_Handler?>
Private Sub Command44_Click()>
Dim x%> On Error Resume Next> x = 1 / 0> On Error GoTo Error_Handler> x = 1 / 0>
Exit_Handler:> On Error Resume Next> x = 1 / 0 'runtime error here is not ignored (i.e. not "skipped")> by the resume next> On Error GoTo 0> Exit Sub>
Error_Handler:> GoTo Exit_Handler>
End Sub>


Add comment
Bob.Needler@Yahoo.Com 6 March 2006 20:57:15 permanent link ]
 Yeah thats it, thanks!

Add comment
David Epsom Dot Com Dot Au 7 March 2006 12:33:15 permanent link ]
 
Err.Clear, On Error Goto, and On Error Resume
do not reset the 'Resume' flag, but they do
wipe out the error object:


Error_Handler:
On Error Resume Next
MsgBox Err.number & ": " & Err.Description
x = 1 / 0 'runtime error here is not ignored (i.e. not "skipped") by
the resume next

Even though they do not reset the 'Resume' flag, they need
to be used with caution if you write an error handling
routine.

(david)




"Matthew Wells" <MWells@FirstByte.n­et> wrote in message
news:5l_Of.420$k75.­214@newsread3.news.a­tl.earthlink.net...>­ The error handler can only handle one error at a time. So when you> triggered the first error, there is still an active error when you > triggered> the error in Exit_handler. You must first "handle' the error in > err_handler> by using the "resume" statement. If you change "goto exit_handler" with> "resume Next" you'll see it works.>
<bob.needler@yahoo.­com> wrote in message> news:1141661764.810­986.309510@j52g2000c­wj.googlegroups.com.­..>> I know On Error Resume Next is generally considered lazy. But can>> someone tell me why the resume next in Exit_Handler does not seem to>> work? It generates the typical unhandled runtime error message from>> Access. If I comment out the 1st On Error Resume Next and the x = 1 />> 0 on the next line there is no difference, i.e. ther same unhandled>> error on the same line. I included these 2 lines of code to>> demonstrate that On Error Resume Next does work in some cases. Anyone>> know why its "not working" in Exit_Handler?>>
Private Sub Command44_Click()>>­
Dim x%>> On Error Resume Next>> x = 1 / 0>> On Error GoTo Error_Handler>> x = 1 / 0>>
Exit_Handler:>> On Error Resume Next>> x = 1 / 0 'runtime error here is not ignored (i.e. not "skipped")>> by the resume next>> On Error GoTo 0>> Exit Sub>>
Error_Handler:>> GoTo Exit_Handler>>
End Sub>>


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QAIX > ColdFusion > On Error Resume Next 24 September 2008 03:44:27

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