Problem clearing send error in email program

[Ed Bitzer]

Trying to send groups of email with program using System.Net.Mail . I
do not clear MailMessage but repeatedly loop changing only the Bcc
entries. Works fine if all addresses are valid. As a simple test I
have attempted to send a valid address, then an invalid address which
my ISP (Comcast) will reject immediately as "Not our customer". I
catch the exception, display and then continue looping to send several
additional valid. The balance all are "caught" and display the an
error but they are sent. I have negligible knowledge of exceptions
but suspect I need to clear.

loop through the following changing only the bcc
try
smtpobject.Send (MyMailMsg)
Catch ex as Exception
msgbox(ex.tostr ing)
end try

Appreciate as usual,

Ed

[Steve Gerrard]

Ed Bitzer wrote:

Trying to send groups of email with program using System.Net.Mail . I
do not clear MailMessage but repeatedly loop changing only the Bcc
entries. Works fine if all addresses are valid. As a simple test I
have attempted to send a valid address, then an invalid address which
my ISP (Comcast) will reject immediately as "Not our customer". I
catch the exception, display and then continue looping to send several
additional valid. The balance all are "caught" and display the an
error but they are sent. I have negligible knowledge of exceptions
but suspect I need to clear.

loop through the following changing only the bcc
try
smtpobject.Send (MyMailMsg)
Catch ex as Exception
msgbox(ex.tostr ing)
end try

Appreciate as usual,

Ed

It looks to me like you need to reset MyMailMsg if there is an exception. The
exception will not persist past the end of the try block.

[Cor Ligthert[MVP]]

Ed,

Can you show the full loop, because in my idea can this not be the base of
your problem.

Cor

[Rad [Visual C# MVP]]

On Mon, 18 Feb 2008 21:53:33 -0500, Ed Bitzer wrote:

Trying to send groups of email with program using System.Net.Mail . I
do not clear MailMessage but repeatedly loop changing only the Bcc
entries. Works fine if all addresses are valid. As a simple test I
have attempted to send a valid address, then an invalid address which
my ISP (Comcast) will reject immediately as "Not our customer". I
catch the exception, display and then continue looping to send several
additional valid. The balance all are "caught" and display the an
error but they are sent. I have negligible knowledge of exceptions
but suspect I need to clear.

loop through the following changing only the bcc
try
smtpobject.Send (MyMailMsg)
Catch ex as Exception
msgbox(ex.tostr ing)
end try

Appreciate as usual,

Ed

Ed,

Post a copy of the entire loop. There are ways you can structure the loop
and the error handler to be more robust to exceptions
--
http://www.thinkersroom.com/bytes

[Herfried K. Wagner [MVP]]

"Mr. Arnold" <MR. Ar****@Arnold.c omschrieb:

>Trying to send groups of email with program using System.Net.Mail . I do
not clear MailMessage but repeatedly loop changing only the Bcc entries.
Works fine if all addresses are valid. As a simple test I have attempted
to send a valid address, then an invalid address which my ISP (Comcast)
will reject immediately as "Not our customer". I catch the exception,
display and then continue looping to send several additional valid. The
balance all are "caught" and display the an error but they are sent. I
have negligible knowledge of exceptions but suspect I need to clear.

loop through the following changing only the bcc
try
smtpobject.Send (MyMailMsg)

>Catch ex as Exception
msgbox(ex.tostr ing)

ex = null
or
ex = nothing 'don't know about that one for sure

No, that doesn't make sense. 'Try...Catch' as used in the OP's sample is
OK.

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>

[Mr. Arnold]

"Herfried K. Wagner [MVP]" <hi************ ***@gmx.atwrote in message
news:O3******** ******@TK2MSFTN GP05.phx.gbl...

"Mr. Arnold" <MR. Ar****@Arnold.c omschrieb:

>>Trying to send groups of email with program using System.Net.Mail . I do
not clear MailMessage but repeatedly loop changing only the Bcc entries.
Works fine if all addresses are valid. As a simple test I have
attempted to send a valid address, then an invalid address which my ISP
(Comcast) will reject immediately as "Not our customer". I catch the
exception, display and then continue looping to send several additional
valid. The balance all are "caught" and display the an error but they
are sent. I have negligible knowledge of exceptions but suspect I need
to clear.

loop through the following changing only the bcc
try
smtpobject.Send (MyMailMsg)

>>Catch ex as Exception
msgbox(ex.tostr ing)

ex = null
or
ex = nothing 'don't know about that one for sure

No, that doesn't make sense. 'Try...Catch' as used in the OP's sample is
OK.

I disagree with you, because I have used both methods to clear the Exception
to keep an application running when it would have stopped on the try/catch
while it was in a processing loop, particularly when processing many methods
within the processing loop and method calling other methods and all of them
having Try/Catches to prevent it from blowing up on the try/catch above it.

This method was used to look for a particular Exception in a multiple
Exceptions try/catch, and if I got the Exception to report the Exception to
a log, clear the Exception and let the processing flow back to the top of
the loop and continue process, otherwise, throw the Exception in each
method above it until it got to the top Try/Catch and terminate the
application.

I have used the method in C# and VB.Net solution with the try/catch and in
VB.Net with the Error GoTo.

[Ed Bitzer]

deleted a bit to the thread to shorten, comment at bottom

>>>Catch ex as Exception
msgbox(ex.tostr ing)
ex = null
or
ex = nothing 'don't know about that one for sure

No, that doesn't make sense. 'Try...Catch' as used in the OP's
sample is OK.

I disagree with you, because I have used both methods to clear the
Exception to keep an application running when it would have stopped
on the try/catch while it was in a processing loop, particularly
when processing many methods within the processing loop and method
calling other methods and all of them having Try/Catches to prevent
it from blowing up on the try/catch above it.

This method was used to look for a particular Exception in a
multiple Exceptions try/catch, and if I got the Exception to report
the Exception to a log, clear the Exception and let the processing
flow back to the top of the loop and continue process, otherwise,
throw the Exception in each method above it until it got to the top
Try/Catch and terminate the application.

I have used the method in C# and VB.Net solution with the try/catch
and in VB.Net with the Error GoTo.

I tried and ex = null constant is no longer supported
ex= nothing ok but error repeated even for valid messages which were
sent.

I have included more extensive code as requested - appreciate your
taking a look.

Ed

\

[Herfried K. Wagner [MVP]]

"Mr. Arnold" <MR. Ar****@Arnold.c omschrieb:

>>>Trying to send groups of email with program using System.Net.Mail . I do
not clear MailMessage but repeatedly loop changing only the Bcc
entries. Works fine if all addresses are valid. As a simple test I
have attempted to send a valid address, then an invalid address which
my ISP (Comcast) will reject immediately as "Not our customer". I catch
the exception, display and then continue looping to send several
additional valid. The balance all are "caught" and display the an error
but they are sent. I have negligible knowledge of exceptions but
suspect I need to clear.

loop through the following changing only the bcc
try
smtpobject.Send (MyMailMsg)

Catch ex as Exception
msgbox(ex.tostr ing)
ex = null
or
ex = nothing 'don't know about that one for sure

No, that doesn't make sense. 'Try...Catch' as used in the OP's sample is
OK.

I disagree with you, because I have used both methods to clear the
Exception to keep an application running when it would have stopped on the
try/catch while it was in a processing loop

If you are catching the exception inside the loop it won't stop the loop.
Setting the exception variable to 'Nothing' doesn't have any influence if
you are using 'Catch ex As <exception type>'.

This method was used to look for a particular Exception in a multiple
Exceptions try/catch, and if I got the Exception to report the Exception
to a log, clear the Exception

You do not have to "clear" exceptions. They are not bubbled up if they are
caught and not rethrown.

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>

[Mr. Arnold]

"Herfried K. Wagner [MVP]" <hi************ ***@gmx.atwrote in message
news:eU******** ******@TK2MSFTN GP03.phx.gbl...

"Mr. Arnold" <MR. Ar****@Arnold.c omschrieb:

>>>>Trying to send groups of email with program using System.Net.Mail . I
do not clear MailMessage but repeatedly loop changing only the Bcc
entries. Works fine if all addresses are valid. As a simple test I
have attempted to send a valid address, then an invalid address which
my ISP (Comcast) will reject immediately as "Not our customer". I
catch the exception, display and then continue looping to send several
additiona l valid. The balance all are "caught" and display the an
error but they are sent. I have negligible knowledge of exceptions
but suspect I need to clear.
>
loop through the following changing only the bcc
try
smtpobject.Send (MyMailMsg)

Catch ex as Exception
msgbox(ex.tostr ing)
ex = null
or
ex = nothing 'don't know about that one for sure

No, that doesn't make sense. 'Try...Catch' as used in the OP's sample
is OK.

I disagree with you, because I have used both methods to clear the
Exception to keep an application running when it would have stopped on
the try/catch while it was in a processing loop

If you are catching the exception inside the loop it won't stop the loop.
Setting the exception variable to 'Nothing' doesn't have any influence if
you are using 'Catch ex As <exception type>'.

>This method was used to look for a particular Exception in a multiple
Exceptions try/catch, and if I got the Exception to report the Exception
to a log, clear the Exception

You do not have to "clear" exceptions. They are not bubbled up if they
are caught and not rethrown.

Look man, you can't tell me something that I have done myself. This is
totally ridiculous, particularly when I have done it.

[Herfried K. Wagner [MVP]]

"Mr. Arnold" <MR. Ar****@Arnold.c omschrieb:

>>>>>Trying to send groups of email with program using System.Net.Mail . I
>do not clear MailMessage but repeatedly loop changing only the Bcc
>entries. Works fine if all addresses are valid. As a simple test I
>have attempted to send a valid address, then an invalid address which
>my ISP (Comcast) will reject immediately as "Not our customer". I
>catch the exception, display and then continue looping to send
>several additional valid. The balance all are "caught" and display
>the an error but they are sent. I have negligible knowledge of
>exceptio ns but suspect I need to clear.
>>
>loop through the following changing only the bcc
>try
> smtpobject.Send (MyMailMsg)
>
>Catch ex as Exception
> msgbox(ex.tostr ing)
ex = null
or
ex = nothing 'don't know about that one for sure

No, that doesn't make sense. 'Try...Catch' as used in the OP's sample
is OK.

I disagree with you, because I have used both methods to clear the
Exception to keep an application running when it would have stopped on
the try/catch while it was in a processing loop

If you are catching the exception inside the loop it won't stop the loop.
Setting the exception variable to 'Nothing' doesn't have any influence if
you are using 'Catch ex As <exception type>'.

>>This method was used to look for a particular Exception in a multiple
Exceptions try/catch, and if I got the Exception to report the Exception
to a log, clear the Exception

You do not have to "clear" exceptions. They are not bubbled up if they
are caught and not rethrown.

Look man, you can't tell me something that I have done myself. This is
totally ridiculous, particularly when I have done it.

Well, just show me where the behavior you describe is specified and/or show
me a code sample that is a proof of what you are saying.

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>