System.OverflowException during IPostBackDataHandler.LoadPostData

[Nathan Sokalski]

During my postbacks, I try to assign the value from an Input tag to a
property of a custom control. However, I keep recieving the following error:


An exception of type 'System.Overflo wException' occurred in
Microsoft.Visua lBasic.dll but was not handled in user code
Additional information: Arithmetic operation resulted in an overflow.


The code that it highlights during this error is the 2nd line of the
following (Me.Value = postCollection( Me.ID & "_currvalue ")):


Public Function LoadPostData(By Val postDataKey As String, ByVal
postCollection As NameValueCollec tion) As Boolean Implements
IPostBackDataHa ndler.LoadPostD ata
Me.Value = postCollection( Me.ID & "_currvalue ")
Return True
End Function


I will admit that this is my first time using the IPostBackDataHa ndler
interface, but 'System.Overflo wException' seems like a very strange
exception for this part of my code, since I am just doing a String
concatenation and an assignment. The value associated with this
postCollection key is a positive integer (well, a string actually, but it
has no negative signs or decimal places, just a couple digits) and Me.Value
is a Property of my Control that is of type Integer, so it shouldn't have
any problem converting, right? If anybody has any ideas as to where I might
be going wrong here, or where I could look to help find the problem, I would
appreciate it. Thanks.
--
Nathan Sokalski
njsokalski@hotm ail.com

http://www.nathansokalski.com/

[Teemu Keiski]

Re: System.Overflow Exception during IPostBackDataHa ndler.LoadPostD ata

What does the Value property and RaisePostDataCh anged method (another method
of IPostBackDataHa ndler) look like? If the code isn't long oner, post entire
control's sources.


--
Teemu Keiski
ASP.NET MVP, AspInsider
Finland, EU

http://blogs.aspadvice.com/joteke

"Nathan Sokalski" <njsokalski@hot mail.comwrote in message
news:%23cRbMd8q GHA.1140@TK2MSF TNGP05.phx.gbl. ..

During my postbacks, I try to assign the value from an Input tag to a
property of a custom control. However, I keep recieving the following
error:
>
>
An exception of type 'System.Overflo wException' occurred in
Microsoft.Visua lBasic.dll but was not handled in user code
Additional information: Arithmetic operation resulted in an overflow.
>
>
The code that it highlights during this error is the 2nd line of the
following (Me.Value = postCollection( Me.ID & "_currvalue ")):
>
>
Public Function LoadPostData(By Val postDataKey As String, ByVal
postCollection As NameValueCollec tion) As Boolean Implements
IPostBackDataHa ndler.LoadPostD ata
Me.Value = postCollection( Me.ID & "_currvalue ")
Return True
End Function
>
>
I will admit that this is my first time using the IPostBackDataHa ndler
interface, but 'System.Overflo wException' seems like a very strange
exception for this part of my code, since I am just doing a String
concatenation and an assignment. The value associated with this
postCollection key is a positive integer (well, a string actually, but it
has no negative signs or decimal places, just a couple digits) and
Me.Value is a Property of my Control that is of type Integer, so it
shouldn't have any problem converting, right? If anybody has any ideas as
to where I might be going wrong here, or where I could look to help find
the problem, I would appreciate it. Thanks.
--
Nathan Sokalski
njsokalski@hotm ail.com

http://www.nathansokalski.com/

>

[Nathan Sokalski]

Re: System.Overflow Exception during IPostBackDataHa ndler.LoadPostD ata

Here is the code for the Value property:


<Description("T he value that the Slider is currently set to")>
<DefaultValue(" 0")_
Public Property Value() As Integer
Get
If IsNothing(ViewS tate("value")) Then Return 0 Else Return
ViewState("valu e")
End Get
Set(ByVal value As Integer)
ViewState("valu e") = value
End Set
End Property


And here is the code for the RaisePostDataCh angedEvent method:


Public Sub RaisePostDataCh angedEvent() Implements
IPostBackDataHa ndler.RaisePost DataChangedEven t
End Sub


The only code in my OnPreRender method other than the creating of the
client-side scripts, which I do using String concatenation and the
Page.ClientScri pt.RegisterClie ntScriptBlock method, is setting the only
global variable I have, which is declared as Private pixeltovalue As
Decimal, as follows:


Me.pixeltovalue = (Me.Width - 48) / (Me.MaxValue - Me.MinValue)


My Render method just uses the basic methods of the HtmlTextWriter class.
The only arithmetic operations in my OnPreRender and Render methods are very
simple addition, subtraction, multiplication, and division. I did not think
it was worth pasting all my code into this message (although I can if you
really think it will help you solve the problem), since almost all of it is
property declarations, all of which look exactly the same as the one above,
String concatenation while building the JavaScript functions, and the basic
HtmlTextWriter methods used to create the html tags; the only other code in
my control is the IPostBackDataHa ndler implementation and the
Me.pixeltovalue declaration and assignment that I showed above. Any ideas as
to what the problem might be? Thanks.
--
Nathan Sokalski
njsokalski@hotm ail.com

http://www.nathansokalski.com/

"Teemu Keiski" <joteke@aspalli ance.comwrote in message
news:Oblpjg9qGH A.4516@TK2MSFTN GP02.phx.gbl...

What does the Value property and RaisePostDataCh anged method (another
method of IPostBackDataHa ndler) look like? If the code isn't long oner,
post entire control's sources.
>
>
--
Teemu Keiski
ASP.NET MVP, AspInsider
Finland, EU

http://blogs.aspadvice.com/joteke

>
>
>
"Nathan Sokalski" <njsokalski@hot mail.comwrote in message
news:%23cRbMd8q GHA.1140@TK2MSF TNGP05.phx.gbl. ..

>During my postbacks, I try to assign the value from an Input tag to a
>property of a custom control. However, I keep recieving the following
>error:
>>
>>
>An exception of type 'System.Overflo wException' occurred in
>Microsoft.Visu alBasic.dll but was not handled in user code
>Additional information: Arithmetic operation resulted in an overflow.
>>
>>
>The code that it highlights during this error is the 2nd line of the
>following (Me.Value = postCollection( Me.ID & "_currvalue ")):
>>
>>
>Public Function LoadPostData(By Val postDataKey As String, ByVal
>postCollecti on As NameValueCollec tion) As Boolean Implements
>IPostBackDataH andler.LoadPost Data
> Me.Value = postCollection( Me.ID & "_currvalue ")
> Return True
>End Function
>>
>>
>I will admit that this is my first time using the IPostBackDataHa ndler
>interface, but 'System.Overflo wException' seems like a very strange
>exception for this part of my code, since I am just doing a String
>concatenatio n and an assignment. The value associated with this
>postCollecti on key is a positive integer (well, a string actually, but it
>has no negative signs or decimal places, just a couple digits) and
>Me.Value is a Property of my Control that is of type Integer, so it
>shouldn't have any problem converting, right? If anybody has any ideas as
>to where I might be going wrong here, or where I could look to help find
>the problem, I would appreciate it. Thanks.
>--
>Nathan Sokalski
>njsokalski@hotm ail.com
>http://www.nathansokalski.com/
>>

>
>

[Teemu Keiski]

Re: System.Overflow Exception during IPostBackDataHa ndler.LoadPostD ata

Hi,

could it be that the

Me.Value = postCollection( Me.ID & "_currvalue ")

would be so big number it doesn't fit to the value? (32-bit Integer). Where
does this value come from? Is it calculated, entered by user?


--
Teemu Keiski
ASP.NET MVP, AspInsider
Finland, EU

http://blogs.aspadvice.com/joteke

"Nathan Sokalski" <njsokalski@hot mail.comwrote in message
news:OWsfabErGH A.3856@TK2MSFTN GP02.phx.gbl...

Here is the code for the Value property:
>
>
<Description("T he value that the Slider is currently set to")>
<DefaultValue(" 0")_
Public Property Value() As Integer
Get
If IsNothing(ViewS tate("value")) Then Return 0 Else Return
ViewState("valu e")
End Get
Set(ByVal value As Integer)
ViewState("valu e") = value
End Set
End Property
>
>
And here is the code for the RaisePostDataCh angedEvent method:
>
>
Public Sub RaisePostDataCh angedEvent() Implements
IPostBackDataHa ndler.RaisePost DataChangedEven t
End Sub
>
>
The only code in my OnPreRender method other than the creating of the
client-side scripts, which I do using String concatenation and the
Page.ClientScri pt.RegisterClie ntScriptBlock method, is setting the only
global variable I have, which is declared as Private pixeltovalue As
Decimal, as follows:
>
>
Me.pixeltovalue = (Me.Width - 48) / (Me.MaxValue - Me.MinValue)
>
>
My Render method just uses the basic methods of the HtmlTextWriter class.
The only arithmetic operations in my OnPreRender and Render methods are
very simple addition, subtraction, multiplication, and division. I did not
think it was worth pasting all my code into this message (although I can
if you really think it will help you solve the problem), since almost all
of it is property declarations, all of which look exactly the same as the
one above, String concatenation while building the JavaScript functions,
and the basic HtmlTextWriter methods used to create the html tags; the
only other code in my control is the IPostBackDataHa ndler implementation
and the Me.pixeltovalue declaration and assignment that I showed above.
Any ideas as to what the problem might be? Thanks.
--
Nathan Sokalski
njsokalski@hotm ail.com

http://www.nathansokalski.com/

>
"Teemu Keiski" <joteke@aspalli ance.comwrote in message
news:Oblpjg9qGH A.4516@TK2MSFTN GP02.phx.gbl...

>What does the Value property and RaisePostDataCh anged method (another
>method of IPostBackDataHa ndler) look like? If the code isn't long oner,
>post entire control's sources.
>>
>>
>--
>Teemu Keiski
>ASP.NET MVP, AspInsider
>Finland, EU
>http://blogs.aspadvice.com/joteke
>>
>>
>>
>"Nathan Sokalski" <njsokalski@hot mail.comwrote in message
>news:%23cRbMd8 qGHA.1140@TK2MS FTNGP05.phx.gbl ...

>>During my postbacks, I try to assign the value from an Input tag to a
>>property of a custom control. However, I keep recieving the following
>>error:
>>>
>>>
>>An exception of type 'System.Overflo wException' occurred in
>>Microsoft.Vis ualBasic.dll but was not handled in user code
>>Additional information: Arithmetic operation resulted in an overflow.
>>>
>>>
>>The code that it highlights during this error is the 2nd line of the
>>following (Me.Value = postCollection( Me.ID & "_currvalue ")):
>>>
>>>
>>Public Function LoadPostData(By Val postDataKey As String, ByVal
>>postCollectio n As NameValueCollec tion) As Boolean Implements
>>IPostBackData Handler.LoadPos tData
>> Me.Value = postCollection( Me.ID & "_currvalue ")
>> Return True
>>End Function
>>>
>>>
>>I will admit that this is my first time using the IPostBackDataHa ndler
>>interface, but 'System.Overflo wException' seems like a very strange
>>exception for this part of my code, since I am just doing a String
>>concatenati on and an assignment. The value associated with this
>>postCollectio n key is a positive integer (well, a string actually, but
>>it has no negative signs or decimal places, just a couple digits) and
>>Me.Value is a Property of my Control that is of type Integer, so it
>>shouldn't have any problem converting, right? If anybody has any ideas
>>as to where I might be going wrong here, or where I could look to help
>>find the problem, I would appreciate it. Thanks.
>>--
>>Nathan Sokalski
>>njsokalski@hotm ail.com
>>http://www.nathansokalski.com/
>>>

>>
>>

>
>

[Nathan Sokalski]

Re: System.Overflow Exception during IPostBackDataHa ndler.LoadPostD ata

No, that was not the problem, but I found that in my client-side JavaScript
I needed to explicitly convert a text value to a Number, I was ending up
with a value like "25-1" being sent to the server instead of 24, but thanks
for your help anyway.
--
Nathan Sokalski
njsokalski@hotm ail.com

http://www.nathansokalski.com/

"Teemu Keiski" <joteke@aspalli ance.comwrote in message
news:ObNfoyJrGH A.4504@TK2MSFTN GP04.phx.gbl...

Hi,
>
could it be that the
>
Me.Value = postCollection( Me.ID & "_currvalue ")
>
would be so big number it doesn't fit to the value? (32-bit Integer).
Where does this value come from? Is it calculated, entered by user?
>
>
--
Teemu Keiski
ASP.NET MVP, AspInsider
Finland, EU

http://blogs.aspadvice.com/joteke

>
>
>
"Nathan Sokalski" <njsokalski@hot mail.comwrote in message
news:OWsfabErGH A.3856@TK2MSFTN GP02.phx.gbl...

>Here is the code for the Value property:
>>
>>
><Description(" The value that the Slider is currently set to")>
><DefaultValue( "0")_
>Public Property Value() As Integer
> Get
> If IsNothing(ViewS tate("value")) Then Return 0 Else Return
>ViewState("val ue")
> End Get
> Set(ByVal value As Integer)
> ViewState("valu e") = value
> End Set
>End Property
>>
>>
>And here is the code for the RaisePostDataCh angedEvent method:
>>
>>
>Public Sub RaisePostDataCh angedEvent() Implements
>IPostBackDataH andler.RaisePos tDataChangedEve nt
>End Sub
>>
>>
>The only code in my OnPreRender method other than the creating of the
>client-side scripts, which I do using String concatenation and the
>Page.ClientScr ipt.RegisterCli entScriptBlock method, is setting the only
>global variable I have, which is declared as Private pixeltovalue As
>Decimal, as follows:
>>
>>
>Me.pixeltovalu e = (Me.Width - 48) / (Me.MaxValue - Me.MinValue)
>>
>>
>My Render method just uses the basic methods of the HtmlTextWriter class.
>The only arithmetic operations in my OnPreRender and Render methods are
>very simple addition, subtraction, multiplication, and division. I did
>not think it was worth pasting all my code into this message (although I
>can if you really think it will help you solve the problem), since almost
>all of it is property declarations, all of which look exactly the same as
>the one above, String concatenation while building the JavaScript
>functions, and the basic HtmlTextWriter methods used to create the html
>tags; the only other code in my control is the IPostBackDataHa ndler
>implementati on and the Me.pixeltovalue declaration and assignment that I
>showed above. Any ideas as to what the problem might be? Thanks.
>--
>Nathan Sokalski
>njsokalski@hotm ail.com
>http://www.nathansokalski.com/
>>
>"Teemu Keiski" <joteke@aspalli ance.comwrote in message
>news:Oblpjg9qG HA.4516@TK2MSFT NGP02.phx.gbl.. .

>>What does the Value property and RaisePostDataCh anged method (another
>>method of IPostBackDataHa ndler) look like? If the code isn't long oner,
>>post entire control's sources.
>>>
>>>
>>--
>>Teemu Keiski
>>ASP.NET MVP, AspInsider
>>Finland, EU
>>http://blogs.aspadvice.com/joteke
>>>
>>>
>>>
>>"Nathan Sokalski" <njsokalski@hot mail.comwrote in message
>>news:%23cRbMd 8qGHA.1140@TK2M SFTNGP05.phx.gb l...
>>>During my postbacks, I try to assign the value from an Input tag to a
>>>property of a custom control. However, I keep recieving the following
>>>error:
>>>>
>>>>
>>>An exception of type 'System.Overflo wException' occurred in
>>>Microsoft.Vi sualBasic.dll but was not handled in user code
>>>Additional information: Arithmetic operation resulted in an overflow.
>>>>
>>>>
>>>The code that it highlights during this error is the 2nd line of the
>>>following (Me.Value = postCollection( Me.ID & "_currvalue ")):
>>>>
>>>>
>>>Public Function LoadPostData(By Val postDataKey As String, ByVal
>>>postCollecti on As NameValueCollec tion) As Boolean Implements
>>>IPostBackDat aHandler.LoadPo stData
>>> Me.Value = postCollection( Me.ID & "_currvalue ")
>>> Return True
>>>End Function
>>>>
>>>>
>>>I will admit that this is my first time using the IPostBackDataHa ndler
>>>interface, but 'System.Overflo wException' seems like a very strange
>>>exception for this part of my code, since I am just doing a String
>>>concatenatio n and an assignment. The value associated with this
>>>postCollecti on key is a positive integer (well, a string actually, but
>>>it has no negative signs or decimal places, just a couple digits) and
>>>Me.Value is a Property of my Control that is of type Integer, so it
>>>shouldn't have any problem converting, right? If anybody has any ideas
>>>as to where I might be going wrong here, or where I could look to help
>>>find the problem, I would appreciate it. Thanks.
>>>--
>>>Nathan Sokalski
>>>njsokalski@hotm ail.com
>>>http://www.nathansokalski.com/
>>>>
>>>
>>>

>>
>>

>
>