I 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)
[code].....
Im getting the Variable (Data) is passed by reference before it has been assigned a value error.
[Code].....
I 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
[code].....
Variable '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
[code].....
I 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
[Code].....
From 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."
[Code]...
I 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 RepliesI 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 Repliesthis 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:
[Code]...
I'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
[code].....
I 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.
I 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
[Code].....
I 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:
[Code]...
I 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"
[code]....
This 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
[Code] .....
This 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 RepliesDim strSearch As String
strSearch = "[Player] Like '" & searchtext & "' AND [Year] Like '" & strYear & "' AND [Brand] Like '" & strBrand & "'"
[code].....
i 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
[Code]...
As 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
[code]....
The code below works for the class that I hard coded "XCCustomers" in my RetrieveIDandName method where I use CType. However, I would like to be able to pass in various classes and property names to get the integer and string LIST returned. For example, in my code below, I would like to also pass in "XCEmployees" to my RetrieveIDandName method. I feel so close... I was hoping someone knew how to use CType where I can pass in the class name as a string variable.
Note, all the other examples I have seen and tried fail because we are using Option Strict On which disallows late binding. That is why I need to use CType.I also studied the "Activator.CreateInstance" code examples to try to get the class reference instance by string name but I was unable to get CType to work with that.When I use obj.GetType.Name or obj.GetType.FullName in place of the "XCCustomers" in CType(obj, XCCustomers)(i)I get the error "Type 'obj.GetType.Name' is not defined" or "Type 'obj.GetType.FullName' is not defined"
'+++++++++++++++++++++++++++++++
Imports DataLaasXC.Business
Imports DataLaasXC.Utilities
[code]....
Following code sample should concatenate the value. Concatenated value has to be assigned to variable AlphaStr. But result is always null in the variable AlphaStr.
[Code]...
The 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 RepliesI 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 '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 ?
I 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
[code]....
The code in my function looks like
FunctionMain(Product,var2,var3)
Call Function1
Call Function2
[code]....
My 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 RepliesI'm in a beginner programming logic and technique class that also teaches us VB, and I'm working on a program that is to simulate total theater revenue, that asks for the number of tickets sold in a particular section and then displays the amount of sales generated from that section. It needs to validate that the total number of tickets sold is not over the maximum seating in that section.[code]
1) I have a warning that "Variable 'section' is used before it has been assigned a value. A null reference exception could result at runtime" in line 18.
2) Regardless of the changes I've made, I always end up getting "0" as my end result. I'm actually supposed to use the toString currency format function when getting my end result, but that was mixing me up so I figured I'd at least make sure the output is correct before I fix that part. I thought I was on the cusp of having this working but I think I'm confusing myself more and more the more I mess with it.
I am getting the error:"Range variable 'sender' hides a variable in an enclosing block or a range variable previously defined in the query expression."for this
Imports System.Data.SqlClient
Imports System.Linq
Public Class Form1
[code]....
I can select any other item from the table without the error. "sender" has the same properties as "receiver" in the SQL table.
I pass this class i created a variable by reference and i want that reference to be assigned to m_Text so that when i change m_Text it changes the TextValue variable i passed. Example:
Dim test2 as String = "ok"
Dim test as New GeneTextBox(test2)
'then some one changes the text in the GeneTextBox and i want it to change the test2 string...
Public Class GeneTextBox
Inherits Windows.Forms.TextBox
Private m_Text As String
Public Sub New(ByRef TextValue As String)
[code]....