Very strange "input string not in correct format" bug

Jen

One user of my application is experiencing an exception "input string not in
correct format". But it makes no sense where it is occurring. It is
occurring when a string from a textbox ("172") is being convert to an Int16
(using Convert.ToInt16 ). How can that be? There are other text boxes that
are used in the identical fashion and they don't generate the exception.
All there are many other machines running my application that don't generate
the exception at all.

I have no idea what the problem could be and am looking for ideas.

Mar 6 '07 #1

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10375

Jon Skeet [C# MVP]

Jen <no**@nowhere.c omwrote:

One user of my application is experiencing an exception "input string not in
correct format". But it makes no sense where it is occurring. It is
occurring when a string from a textbox ("172") is being convert to an Int16
(using Convert.ToInt16 ). How can that be? There are other text boxes that
are used in the identical fashion and they don't generate the exception.
All there are many other machines running my application that don't generate
the exception at all.

I have no idea what the problem could be and am looking for ideas.

Could you post a short but complete program which demonstrates the
problem?

See http://www.pobox.com/~skeet/csharp/complete.html for details of
what I mean by that.

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
If replying to the group, please do not mail me too

Mar 6 '07 #2

Jen

I can post the relevant code snippets but I doubt I can reproduce the
problem. It's only occuring on one machine out of about a dozen tested.
"Jon Skeet [C# MVP]" <sk***@pobox.co mwrote in message
news:MP******** *************** *@msnews.micros oft.com...

Jen <no**@nowhere.c omwrote:
>One user of my application is experiencing an exception "input string not
in
correct format". But it makes no sense where it is occurring. It is
occurring when a string from a textbox ("172") is being convert to an
Int16
(using Convert.ToInt16 ). How can that be? There are other text boxes
that
are used in the identical fashion and they don't generate the exception.
All there are many other machines running my application that don't
generate
the exception at all.

I have no idea what the problem could be and am looking for ideas.

Could you post a short but complete program which demonstrates the
problem?

See http://www.pobox.com/~skeet/csharp/complete.html for details of
what I mean by that.

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
If replying to the group, please do not mail me too

Mar 6 '07 #3

Jon Skeet [C# MVP]

Jen <no**@nowhere.c omwrote:

I can post the relevant code snippets but I doubt I can reproduce the
problem. It's only occuring on one machine out of about a dozen tested.

Can you produce a short but complete program that fails on that single
machine? (A console app would be easiest.)

It does sound very odd...

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
If replying to the group, please do not mail me too

Mar 6 '07 #4

Jen

I'll see what I can do.

This almost smells like a culture-conversion type of problem. But
converting a string that only contains an integer number (and a small
integer number at that) to an int16? How can that fail? But I've been
Googling and it appears others have experienced it as well. Not sure about
an easy fix yet though.
"Jon Skeet [C# MVP]" <sk***@pobox.co mwrote in message
news:MP******** *************** *@msnews.micros oft.com...

Jen <no**@nowhere.c omwrote:
>I can post the relevant code snippets but I doubt I can reproduce the
problem. It's only occuring on one machine out of about a dozen tested.

Can you produce a short but complete program that fails on that single
machine? (A console app would be easiest.)

It does sound very odd...

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
If replying to the group, please do not mail me too

Mar 7 '07 #5

mpetrotta

On Mar 6, 2:13 pm, "Jen" <n...@nowhere.c omwrote:

I can post the relevant code snippets but I doubt I can reproduce the
problem. It's only occuring on one machine out of about a dozen tested.

This sounds similar to a problem I saw a few months ago:

"Convert.ToInt3 2("0") throws an exception, some systems"
http://groups.google.com/group/micro...b8e300c7c60821

I filed a bug with Microsoft; they're not able to reproduce it. You
might want to post some details in that bug report:

https://connect.microsoft.com/feedba...1.0&siteid=210

Michael

Mar 7 '07 #6

Jen

Yep, it sounds just like my problem. I'm using .NET 2.0 as well.

<mp*******@gmai l.comwrote in message
news:11******** *************@v 33g2000cwv.goog legroups.com...

On Mar 6, 2:13 pm, "Jen" <n...@nowhere.c omwrote:
>I can post the relevant code snippets but I doubt I can reproduce the
problem. It's only occuring on one machine out of about a dozen tested.

This sounds similar to a problem I saw a few months ago:

"Convert.ToInt3 2("0") throws an exception, some systems"
http://groups.google.com/group/micro...b8e300c7c60821

I filed a bug with Microsoft; they're not able to reproduce it. You
might want to post some details in that bug report:

https://connect.microsoft.com/feedba...1.0&siteid=210

Michael

Mar 7 '07 #7

bob

Hi Jen,
This is based on nothing but intuition and witchcraft.
Can you check the culture info of the thread just prior to the offending
instruction?
regards
Bob

"Jen" <no**@nowhere.c omwrote in message
news:%2******** ********@TK2MSF TNGP06.phx.gbl. ..

One user of my application is experiencing an exception "input string not

correct format". But it makes no sense where it is occurring. It is
occurring when a string from a textbox ("172") is being convert to an

Int16

(using Convert.ToInt16 ). How can that be? There are other text boxes

that

are used in the identical fashion and they don't generate the exception.
All there are many other machines running my application that don't

generate

the exception at all.

I have no idea what the problem could be and am looking for ideas.

Mar 7 '07 #8

Laura T.

What diffrences have the machines that generate exception?
Framework version, hot fixes, OS fixes, UI language/culture etc.?
I tried to reproduce the exception by setting the thread culture to all
possibile cultures I have (158) but did not get any exception from
Convert.ToInt16 ("172").
The only thing I cannot test that could have something to do with cultures
are the UI cultures but, I'd rather check first what are the differences.
"Jen" <no**@nowhere.c omha scritto nel messaggio
news:%2******** ********@TK2MSF TNGP06.phx.gbl. ..

One user of my application is experiencing an exception "input string not
in correct format". But it makes no sense where it is occurring. It is
occurring when a string from a textbox ("172") is being convert to an
Int16 (using Convert.ToInt16 ). How can that be? There are other text
boxes that are used in the identical fashion and they don't generate the
exception. All there are many other machines running my application that
don't generate the exception at all.

I have no idea what the problem could be and am looking for ideas.

Mar 7 '07 #9

Jen

I can't really do a detailed analysis of the differences because the
offending machine is not accessible to me at the moment.

What the code is doing is it's taking a string from a TextBox that is part
of a User Control and converting it to a short. The exception's trace looks
something like this:

System.Number.S tringToNumber()
System.Number.P arseInt32()
System.Number.I nt16.Parse()
Util.IPAddressB ox.get_Octet3() <-- this is an Int16 property in my user
control

I'm not sure why the call to ParseInt32 is there but I guess that's the way
it works. I've also seen the exception happen with textboxes that convert
right to Int32 instead of Int16. They are also accessed through a property
of a user control.
I am having the guy that owns the machine try the "set locale to something
else then back again to English (US)" trick that someone mentioned to see if
that fixes it. If it does not I'll pursue additional debugging.
"Laura T." <LT@NOWHERE.COM wrote in message
news:eK******** *****@TK2MSFTNG P06.phx.gbl...

What diffrences have the machines that generate exception?
Framework version, hot fixes, OS fixes, UI language/culture etc.?
I tried to reproduce the exception by setting the thread culture to all
possibile cultures I have (158) but did not get any exception from
Convert.ToInt16 ("172").
The only thing I cannot test that could have something to do with cultures
are the UI cultures but, I'd rather check first what are the differences.
"Jen" <no**@nowhere.c omha scritto nel messaggio
news:%2******** ********@TK2MSF TNGP06.phx.gbl. ..
>One user of my application is experiencing an exception "input string not
in correct format". But it makes no sense where it is occurring. It is
occurring when a string from a textbox ("172") is being convert to an
Int16 (using Convert.ToInt16 ). How can that be? There are other text
boxes that are used in the identical fashion and they don't generate the
exception. All there are many other machines running my application that
don't generate the exception at all.

I have no idea what the problem could be and am looking for ideas.

Mar 7 '07 #10

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