System.InvalidCastException: Cast from string "146586#" to type 'Integer' is not valid.
What would be a good way to stop this? Should I somehow trim the very last character if its equal to a "#" .
If so, how can I achieve this?
Thanks
mike123That is weird. The only time I have seen a # appended is when somebody uses the onclick in a A tag
for instance:Click me
In my opinion and to avoid these @.$R # signs is to use this:
Click Me
--------------------
Dim NewGender as String
if (Gender.SelectedItem.Value <> "") then
NewGender = Gender.SelectedItem.Value
else
NewGender = ""
end if
If nothing is selected, I get the following error..
System.NullReferenceException: Object reference not set to an instance
of an object.
thank in advance..Yes, if no item is selected then you get the error. Wouldn't you expect to
get it if you are checking the Value property of SelectedItem, but
SelectedItem is null?
What is your question exactly?
"Brian" <bciarcia@.pepehazard.com> wrote in message
news:1112200428.271311.212350@.l41g2000cwc.googlegr oups.com...
>i have a radiobuttonlist. I want to check to see if a button has been
> selected then get the value.. This was my code;
> --------------------
> Dim NewGender as String
> if (Gender.SelectedItem.Value <> "") then
> NewGender = Gender.SelectedItem.Value
> else
> NewGender = ""
> end if
> If nothing is selected, I get the following error..
> System.NullReferenceException: Object reference not set to an instance
> of an object.
> thank in advance..
I needed to check if there was a value or not, so I wouldn't get an
error when I posted the value..
I figured it out though.. i needed to to Gender.SelectedValue.. I am
kinda new to this, so I am still learning.. Thanks for your response..
*** Sent via Developersdex http://www.developersdex.com ***
Hi Brian,
1. You can set a default value for radiobuttonlist.
2. Or you can
If Not Gender.SelectedItem Is Nothing Then
if (Gender.SelectedItem.Value <> "") then
' ...
End If
HTH
Elton Wang
elton_wang@.hotmail.com
>--Original Message--
>i have a radiobuttonlist. I want to check to see if a
button has been
>selected then get the value.. This was my code;
>------------------
--
>Dim NewGender as String
>if (Gender.SelectedItem.Value <> "") then
>NewGender = Gender.SelectedItem.Value
>else
>NewGender = ""
>end if
>If nothing is selected, I get the following error..
>System.NullReferenceException: Object reference not set
to an instance
>of an object.
>thank in advance..
>.
Brian,
I've been doing some research on radiobuttonlists and from what i've read
and the examples i've looked at, i have not yet found a way to handle an
"unselected" radiobuttonlist.
Are you trying to update a database or just trying to display what the user
has selected?
Also, i'd be interested to know if you have found a way to update a
database (even if it's a null value) if no items in a radiobuttonlist have
been selected.
Thanks.
--
Message posted via http://www.dotnetmonster.com
' Grab the textbox values of the interest cost table, loop through them adding up the values and displaying the totals
PrivateSub btnInterestCostTotal_Click(ByVal senderAs System.Object,ByVal eAs System.EventArgs)Handles btnInterestCostTotal.Click
'AddField(DS_Term.Text)
Dim C, NAsInteger
'Find the txtAnnualInterestTotal textbox
Dim AITAs TextBox =CType(myTable.FindControl("txtAnnualInterestTotal"), TextBox)
Dim finalValAs Int64 = 0
'Loop through the dynamic textboxes
For C = 0ToCInt(DS_Term.Text) - 1
N = N + 1
Dim strAIAs TextBox =CType(myTable.FindControl("txtAnnualInterest" & N), TextBox)
'Add all the dynamic textboxes up
finalVal = finalVal + Convert.ToInt64(strAI.Text)
Next
'Display the total value in the txtAnnualInterestTotal textbox
AIT.Text = Convert.ToString(finalVal)
EndSub
code------------
I believe I am. Here is the code I am adding to the Page Init. Am I corrected adding them?
Sub createDynamicFields()
' Create the table and the controls based on the Term(# of years)
Dim IAsInteger
Dim intCounterAs Int64
If DS_Term.Text <> ""Then
For I = 0ToCInt(DS_Term.Text) - 1
Dim lblFiscalYearAs LiteralControl =New LiteralControl
Dim txtTextBoxAs TextBox =New TextBox
Dim txtTextBox2As TextBox =New TextBox
Dim txtTextBox3As TextBox =New TextBox
Dim tRow2As TableRow =New TableRow
Dim tCell1As TableCell =New TableCell
Dim tCell2As TableCell =New TableCell
Dim tCell3As TableCell =New TableCell
Dim tCell4As TableCell =New TableCell
' Grab Fiscal Year from tbBeginngingFiscalYear and Incurment the date by the DS_BondTerm field
lblFiscalYear.ID = "lblFiscalYear" & I + 1
lblFiscalYear.Text = Convert.ToString(Convert.ToInt64(DS_BeginningFiscalYear.Text) + I)
'**********************************
'Set the column width and
txtTextBox.Columns = 15
txtTextBox2.Columns = 15
txtTextBox3.Columns = 15
'Assign the textboxes IDs
txtTextBox.ID = "txtInterest" & I + 1
txtTextBox2.ID = "txtOsPrincipal" & I + 1
txtTextBox3.ID = "txtAnnualInterest" & I + 1
'Assign pre-defined values
'txtTextBox.Text = CStr(I + 1)
'txtTextBox2.Text = CStr(I + 1)
'txtTextBox3.Text = CStr(I + 1)
'Assign the cells to a row
tRow2.Cells.Add(tCell1)
tRow2.Cells.Add(tCell2)
tRow2.Cells.Add(tCell3)
tRow2.Cells.Add(tCell4)
'Assign the row to the table
myTable.Rows.Add(tRow2)
'Create the new controls
tCell1.Controls.Add(lblFiscalYear)
tCell2.Controls.Add(txtTextBox)
tCell3.Controls.Add(txtTextBox2)
tCell4.Controls.Add(txtTextBox3)
'Add the table to the placeholder
plhBondTerms.Controls.Add(myTable)
myTable.CellPadding = 0
myTable.CellSpacing = 0
'intCounter = intCounter + 1
'ViewState("Count") = intCounter
Next I
' ************************************
EndIf
EndSub
I have a component that returns a value from a Sql Count statement... unfortunately I get the following error: System.NullReferenceException: Object reference not set to an instance of an object.
My component code:
Function GetCount(varAccountNumber as String) as String
conSqlConnect = New SqlConnection( "..." )
conSqlConnect.Open()
cmdSelect = New SqlCommand( "SELECT Count([account number]) AS Total From some_table Where [account number]=@dotnet.itags.org.accountnumber", conSqlConnect )
cmdSelect.Parameters.Add( "@dotnet.itags.org.accountnumber", varAccountNumber )
Return (cmdselect.executescalar())
conSqlConnect.Close()
End Function
on my code-behind page. I have
If myComponent.GetCount(user.identity.name) = 0 Then
'do something
End If
any suggestions?Which line caused this error?
>>Which line caused this error?
If myComponent.GetCount(user.identity.name) = 0 Then
Dim MyComponent as MyComponentClass
myComponent = New MyComponentClass()
any suggestions?
Either the component or the user.identity.name is causing the error. Try to debug the GetCount function of your component and also check if user.identity.name contains any value. At last I would say that debugging is the only way. Try quickwatch in Visual Studio.
Hope that it helped at least a little bit.
An exception of type 'System.OverflowException' occurred in
Microsoft.VisualBasic.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(ByVal postDataKey As String, ByVal
postCollection As NameValueCollection) As Boolean Implements
IPostBackDataHandler.LoadPostData
Me.Value = postCollection(Me.ID & "_currvalue")
Return True
End Function
I will admit that this is my first time using the IPostBackDataHandler
interface, but 'System.OverflowException' 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@dotnet.itags.org.hotmail.com
http://www.nathansokalski.com/What does the Value property and RaisePostDataChanged method (another method
of IPostBackDataHandler) 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@.hotmail.comwrote in message
news:%23cRbMd8qGHA.1140@.TK2MSFTNGP05.phx.gbl...
Quote:
Originally Posted by
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.OverflowException' occurred in
Microsoft.VisualBasic.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(ByVal postDataKey As String, ByVal
postCollection As NameValueCollection) As Boolean Implements
IPostBackDataHandler.LoadPostData
Me.Value = postCollection(Me.ID & "_currvalue")
Return True
End Function
>
>
I will admit that this is my first time using the IPostBackDataHandler
interface, but 'System.OverflowException' 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@.hotmail.com
http://www.nathansokalski.com/
>
<Description("The value that the Slider is currently set to")>
<DefaultValue("0")_
Public Property Value() As Integer
Get
If IsNothing(ViewState("value")) Then Return 0 Else Return
ViewState("value")
End Get
Set(ByVal value As Integer)
ViewState("value") = value
End Set
End Property
And here is the code for the RaisePostDataChangedEvent method:
Public Sub RaisePostDataChangedEvent() Implements
IPostBackDataHandler.RaisePostDataChangedEvent
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.ClientScript.RegisterClientScriptBlock 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 IPostBackDataHandler 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@.hotmail.com
http://www.nathansokalski.com/
"Teemu Keiski" <joteke@.aspalliance.comwrote in message
news:Oblpjg9qGHA.4516@.TK2MSFTNGP02.phx.gbl...
Quote:
Originally Posted by
What does the Value property and RaisePostDataChanged method (another
method of IPostBackDataHandler) 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@.hotmail.comwrote in message
news:%23cRbMd8qGHA.1140@.TK2MSFTNGP05.phx.gbl...
Quote:
Originally Posted by
>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.OverflowException' occurred in
>Microsoft.VisualBasic.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(ByVal postDataKey As String, ByVal
>postCollection As NameValueCollection) As Boolean Implements
>IPostBackDataHandler.LoadPostData
> Me.Value = postCollection(Me.ID & "_currvalue")
> Return True
>End Function
>>
>>
>I will admit that this is my first time using the IPostBackDataHandler
>interface, but 'System.OverflowException' 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@.hotmail.com
>http://www.nathansokalski.com/
>>
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@.hotmail.comwrote in message
news:OWsfabErGHA.3856@.TK2MSFTNGP02.phx.gbl...
Quote:
Originally Posted by
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(ViewState("value")) Then Return 0 Else Return
ViewState("value")
End Get
Set(ByVal value As Integer)
ViewState("value") = value
End Set
End Property
>
>
And here is the code for the RaisePostDataChangedEvent method:
>
>
Public Sub RaisePostDataChangedEvent() Implements
IPostBackDataHandler.RaisePostDataChangedEvent
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.ClientScript.RegisterClientScriptBlock 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 IPostBackDataHandler 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@.hotmail.com
http://www.nathansokalski.com/
>
"Teemu Keiski" <joteke@.aspalliance.comwrote in message
news:Oblpjg9qGHA.4516@.TK2MSFTNGP02.phx.gbl...
Quote:
Originally Posted by
>What does the Value property and RaisePostDataChanged method (another
>method of IPostBackDataHandler) 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@.hotmail.comwrote in message
>news:%23cRbMd8qGHA.1140@.TK2MSFTNGP05.phx.gbl...
Quote:
Originally Posted by
>>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.OverflowException' occurred in
>>Microsoft.VisualBasic.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(ByVal postDataKey As String, ByVal
>>postCollection As NameValueCollection) As Boolean Implements
>>IPostBackDataHandler.LoadPostData
>> Me.Value = postCollection(Me.ID & "_currvalue")
>> Return True
>>End Function
>>>
>>>
>>I will admit that this is my first time using the IPostBackDataHandler
>>interface, but 'System.OverflowException' 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@.hotmail.com
>>http://www.nathansokalski.com/
>>>
Quote:
Originally Posted by
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@.hotmail.comwrote in message
news:OWsfabErGHA.3856@.TK2MSFTNGP02.phx.gbl...
Quote:
Originally Posted by
>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(ViewState("value")) Then Return 0 Else Return
>ViewState("value")
> End Get
> Set(ByVal value As Integer)
> ViewState("value") = value
> End Set
>End Property
>>
>>
>And here is the code for the RaisePostDataChangedEvent method:
>>
>>
>Public Sub RaisePostDataChangedEvent() Implements
>IPostBackDataHandler.RaisePostDataChangedEvent
>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.ClientScript.RegisterClientScriptBlock 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 IPostBackDataHandler
>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@.hotmail.com
>http://www.nathansokalski.com/
>>
>"Teemu Keiski" <joteke@.aspalliance.comwrote in message
>news:Oblpjg9qGHA.4516@.TK2MSFTNGP02.phx.gbl...
Quote:
Originally Posted by
>>What does the Value property and RaisePostDataChanged method (another
>>method of IPostBackDataHandler) 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@.hotmail.comwrote in message
>>news:%23cRbMd8qGHA.1140@.TK2MSFTNGP05.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.OverflowException' occurred in
>>>Microsoft.VisualBasic.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(ByVal postDataKey As String, ByVal
>>>postCollection As NameValueCollection) As Boolean Implements
>>>IPostBackDataHandler.LoadPostData
>>> Me.Value = postCollection(Me.ID & "_currvalue")
>>> Return True
>>>End Function
>>>>
>>>>
>>>I will admit that this is my first time using the IPostBackDataHandler
>>>interface, but 'System.OverflowException' 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@.hotmail.com
>>>http://www.nathansokalski.com/
>>>>
>>>
>>>
