Variable Is Passed By Reference Before It Has Been Assigned A Value
Jul 7, 2008Im getting the Variable (Data) is passed by reference before it has been assigned a value error.
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.net - Variable 'cl' Is Passed By Reference Before It Has Been Assigned A Value For DataView Variable?
Feb 1, 2012I have the following code passing a dataView variable to a function and I am getting the following warning:"Variable 'cl' is passed by reference before it has been assigned a value. A null reference exception could result at runtime."
Function Editclass()
Dim cl As DataView
Bindclass (SqlConnection2, cl)
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Variable Passed By Reference?
Oct 28, 2011I am working on a little program (game) is called Pig latin. I created a sub procedure and I passed the word to be converted by value and the piglatin word byref.Now when I call the procedure in the button click event I get the wavy green line under the variable passed by reference but the program works ok. Call Convert_to_Pig_Latin(strOriginalWord, trPigLatinThe error message when I hover my mouse over the green line says " Variable strPigLatin' is passed by reference before it has been assigned a value. A null reference exception could result at runtime."
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
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Variable 'loNode' Is Used Before It Has Been Assigned A Value. A Null Reference Exception Could Result At Runtime
Jun 12, 2011Variable 'loNode' is used before it has been assigned a value. A null reference exception could result at runtime.
why I am getting this error?
Imports System.Xml
Module Module1
Sub Main()
Dim doc As New XmlDocument
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Write A Variable To A File That Has A Different Type Than The Function Assigned To The Variable
Sep 17, 2011I have the following code that I am using to parse out a test file. I am getting variable conversion error in Sub Main() when I assign file = Read(). The return value of Read() is a TextFieldParser type. How do I assign the proper variable type to "file" so I can write the output to a text file?
Function Read()
Using MyReader As New FileIO.TextFieldParser("C:UsersColinDesktopParse_Me.txt")
Dim currentRow As String
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.net - Using A Variable Before It Has Been Assigned A Value?
Apr 3, 2012From the MSDN Article I read I should be using the StringBuilder rather than concatenating a normal string.However I do not know why I get the following errer: "Variable 'ShowString' is used before it has been assigned a value. A null reference exception could result at runtime."
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Asp.net Variable Xyz Is Used Before It Has Been Assigned A Value
Nov 25, 2011I am working with VS 2010 web VB 2010 asp.net..I am trying to read table data with the help of dataset.xsd..i create a loginDataSet.xsd and in index.aspx.vb web page i wrote this code [code] But it showing that abc variable is used before it has been assigned a value a null reference exception could result at the runtime .
View 5 RepliesVariable '' Is Used Before It Has Been Assigned?
Jul 13, 2009I am using visual basic 2008How can i fix this problem:Warning1Variable 'bla' is used before it has been assigned a value. A null reference exception could result at runtime.
View 3 RepliesVariable Being Used Before It Has Been Assigned A Value
May 24, 2012this is my first post I'm making a cheque book balance for my college assignment, which 1st form will record the data of the cheque (Cheque Number, Payee's Name & Cheque Amount) and this information would be stored to a .dat file. with the 2nd form will balance the Current balance in the account minus the cheque amount which has been stored in the .dat file and then will list it in a list box with the payee's name, cheque number, etc. I have used a module which is below:
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Variable Is Used Before It Has Been Assigned A Value?
Nov 17, 2009I'm getting the error message "Variable 'WordCreated' is used before it has been assigned a value..."As such, VB is not even letting me assign a value to any slots in the array.
Dim WordCreated() As String
WordCreated(0) = "Hello!"
That's just a snippet of my code, when declaring the variables. The "Hello!" part has just
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Variable PS Has Been Used Without Being Assigned Value
Aug 27, 2011I declare:
dim PS as powerstatus
Then I type:
MsgBox(PS.whatever) and then the PS is underlined with a green line with a message saying something like: variable PS has been used without being assigned a value. How can I assign PS a value so I can use it? I know that the msgbox code is probably wrong - I'm just using it as an example.
Forms :: Store The Reference Passed To A Sub?
Aug 6, 2010I've searched a lot on both google and here but sorry, couldn't find.Maybe I'm just asking the wrong question, so I'll try to explain it here to see if someone can help me:
what I'm trying to do is what in C would be as simple as int varptr = &var I have a form that is just a communication watcher/logger. It's just a blank text box with a Pause/Play button and a copy to clipboard button and every new activity on my serial communication is logged. At the moment the form have a timer that once a second do textbox.text = serial1.log ...
but the problem is that I also have serial2; serial3; sql1 that I would like to keep an eye on them, and considering my work here I'm sure I would be re-using this form a lot if I could make it portable. Create one form for each is just stupid, as you'll all agree.
Then I would like to have an sub initialise(byref log as string) that would store this reference into an local variable within the form; so that every new instance of my form could be initialised with whatever log they'll be looking for and the timer just make textbox.text = LogPointer to the actual value of the log string.So, as I said I really wanted a int varptr = &var
CustomerStreamToRead' Is Used Before It Has Been Assigned A Value. A Null Reference Exception Could Result At Runtime?
Jul 4, 2011CustomerStreamToRead' is used before it has been assigned a value. A null reference exception could result at runtime.I get that warning once I commented out the streamreader line listed below. The warning shows for the line loading settings(z). The app runs but I don't like warnings in my error list.
Code:
Public Sub LoadSettings()
Dim Z As Integer
Dim CustomerStreamToRead As StreamReader
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Variable 'email' Is Used Before It Has Been Assigned A Value?
Feb 16, 2012I receive the error -
Variable 'email' is used before it has been assigned a value. A null reference exception could result at runtime.
Private Sub surname()
Dim email As String
'Dim query As String
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Variable 'xid' Is Either Undeclared Or Was Never Assigned?
May 9, 2010I am using vb.net 2003 for a stand alone windows program. I access an Access database file via Jet 4.0 and OleDbDataAdapter.
The program is like a "check book" for commercial fishermen to track their landings in relation to the amount of "quota" that they have been assigned. The program is structured so a fisherman can enter multiple boat names and track each one seperately. To work on a particular boats account, the fisherman would select a boat name from a drop down list. The boat name is then captured and assigned the string variable name of "xid" and in a Module have this code:Public xid As String
I have used the DataAdapter Configuration Wizard to setup the data connection and assign the DataAdapter and DataSet. I went into the code and manually entered a WHERE clause to filter the data for the selected boat. The proper syntax was an issue that I had a problem with earlier, but once I got that correct, the program worked fine. The code that works is below:
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Variable Is Used Before It Has Being Assigned A Value In Rollback?
May 6, 2009I used code below to run rollback but in catch block, a warning message said that thistransaction used before has being assigned a value. How to void it?
Dim thisConnection As New SqlConnection("server=(local)SQLEXPRESS;" & _
"integrated security=sspi;database=MyDatabase")
Dim sql As String = "DELETE FROM Employee " & "WHERE ID = 10"
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Variable String Used Before Value Assigned
Jan 17, 2011This code works well but somehow it is giving me a warning saying: "Variable 'str1' is used before it has been assigned a value. A null reference exception could result at runtime."How can I remove the warning.
Public Shared Function getAllColumnNames(ByVal tblname As String) As String()
Dim com As New OleDbCommand
Dim con As OleDbConnection
Dim str1() As String
Dim dtable1 As DataTable
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Variable Used Before Assigned Value Warning
Apr 19, 2008This program is for advertising ads and prices are determined by which radiobutton is selected.This program uses objects created from a class . I am getting a waring message that Variable 'ad' is used before it has been assigned a value. A null reference exception could result at runtime. the warning is at ad.size = 225.So how do I get the variable filled before used if it depends on which radiobutton is checked? [code]
View 8 RepliesVS 2008 Variable Used Before Assigned Value?
Dec 25, 2011Dim strSearch As String
strSearch = "[Player] Like '" & searchtext & "' AND [Year] Like '" & strYear & "' AND [Brand] Like '" & strBrand & "'"
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VS 2010 Variable 'xxx' Is Used Before It Has Been Assigned A Value?
Aug 24, 2011i am using the following VB6 code and I get this error Variable 'osv' is used before it has been assigned a value in VB2010.I want to use this code/method for getting the version, I just want to fix this
Public Class Form1
Private Declare Function GetVersionEx Lib "kernel32" Alias "GetVersionExA" _
(lpVersionInformation As OSVERSIONINFO) As Long
Private Structure OSVERSIONINFO
Dim OSVSize As Integer
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Why FF000010 Could Not Be Assigned To The Variable
Nov 28, 2011As i tried to describe inside the code there is a strange assignment problem: According to code why FF000010 could not be assigned to the variable and there became an "overflowException was unhandled" while data inputting into the integer value that i could not resolve the problem.
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MsgBox(Hex(AlphaMix(16, 255)))
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Private Function AlphaMix(ByVal pInteger As Integer, ByVal pAlpha As Long) As Integer
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Concatenated Value Has To Be Assigned To Variable AlphaStr?
Aug 6, 2009Following code sample should concatenate the value. Concatenated value has to be assigned to variable AlphaStr. But result is always null in the variable AlphaStr.
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Identifying Control With Assigned Variable
Mar 24, 2009The basic question is can I assign a variable to represent a control? As an example which of 12 tickBoxes have been ticked. Is this possible with a for next loop?
View 5 RepliesLazy Load Variable Being Assigned
Jan 4, 2010I have a strange problem with a lazy load property in my class.[code]The problem i have is that when i create a new instance of the class the value of 'mMarksLoaded' is true however when i put a break point on this section of code, execution is never interrupted.Is it possible that the .net framework is accessing this property behind the scenes?
View 12 RepliesVariable 'Random Number' Is Used Before It Has Been Assigned A Value?
Aug 25, 2009Variable 'RandomNumber' is used before it has been assigned a value. A new reference exception could result at runtime.
Sub RandomizeConLandLaunch(ByRef con As Integer)
Dim RandomNumber(,) As Integer
ConLandLaunch(con) = RandomNumber(1, 30000)
End Sub
what should i do ?
VS 2010 : Variable 'retVal' Is Used Before It Has Been Assigned A Value
May 4, 2012I get error "Variable 'retVal' is used before it has been assigned a value. A null reference exception could result at runtime." Here is my
Private Function JoinDomain() As Object
Dim BungeOU As String = "OU=Computers" & ",OU=" & SitesCmboBx.Text & "O=Na.Dir.Bunge.Com"
Dim args(4) As String
'Dim args2(2) As String
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DB/Reporting :: Error: Variable 'strConnString' Is Used Before It Has Been Assigned?
Mar 30, 2008My program does not build because of the following error. I understand the part about a null value, to a degree, but the assigned value I'm not sure about. by clarifying it's meaning. To me, there's nothing obvious about why it's not working.
View 1 RepliesControlling Multiple Textboxes From Single Function - Passed In By Reference?
May 1, 2011Is there a way to write a single function that will control validating the input to any textbox? How to pass control of it.
E.g.: My second try was to:
Dim CurrentTextBox As TextBox << Declare a global
Write a function that uses the global textbox and takes in 2 parameters, one determining the length it has to validate and the second telling it what to do once the input is verified
Public Sub ConfirmInput(length As Integer, which As Integer)
If (CurrentTextBox.TextLength < length) Then
CurrentTextBox.BackColor = vbRed
GoTo DONE
ElseIf (CurrentTextBox.TextLength > length) Then
CurrentTextBox.BackColor = vbRed
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My first try was to pass a textBox parameter to the ConfirmInput function but I believe that's the same problem as above.
Function Accessed By Multiple Threads With Parameter Passed By Reference
Apr 29, 2011I am in vb.net and have a function that will be accessed by multiple threads. Everything inside the function uses local variables. However, each thread will pass in its own dataset by reference. From what I have read the local variables should be no problem, but I think the dataset coming in is a concern. How should I control access / execution of this function to make sure that it is thread safe?
View 1 RepliesVariable Passed In Sub Changes Procedures In Sub?
Apr 9, 2009The code in my function looks like
FunctionMain(Product,var2,var3)
Call Function1
Call Function2
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