Variable '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 ?
how do i assigned random number to either a label or a text box?
View 1 RepliesI am making a simple console game. If you have ever heard of the board game code breaker you will understand better.
In my version of the game you will have to figure out a four number combination. The only numbers it can be is 1, 2, 3, or 4.
I need to generate four random numbers and put each on into its own variable. This allows me to call back each number.
How do I do this? I have been doing some research on random numbers and I use this code to generate four random numbers
Dim rnd As New Random()
Console.WriteLine("20 random integers from -100 to 100:")
For ctr As Integer = 1 To 20
Console.Write("{0,6}", rnd.Next(-100, 101))
If ctr Mod 5 = 0 Then Console.WriteLine()
Next
Console.WriteLine()
But I can't figure out to put each number into a variable so I can call the same numbers back.
have code to generate a new random number as follows (which is 100% working and generating numbers between 0-9:
Dim randomNumber As Integer
Dim randomNumber1 As New Random
[code].....
as the title suggests i am trying to save a randomly generated number to a variable.I have done:
Dim randomposition As Integer
randomposition = Rnd(1, 1000)
when i do this it gives me this error:
[code].....
I know that there is a way in which you can generate any random number between any range using the random variable. But my question is that is there any way to do the same thing but with letters?
View 1 RepliesI 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].....
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].....
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.
...
MsgBox(Hex(AlphaMix(16, 255)))
...
Private Function AlphaMix(ByVal pInteger As Integer, ByVal pAlpha As Long) As Integer
[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 RepliesIm getting the Variable (Data) is passed by reference before it has been assigned a value error.
[Code].....
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]....
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 have 2 winforms, one acts as server (ie Winform:Server role) and another one as client (ie Winform: Client role). In my LAN setup, there are 6 PCs and these PCs connected to each other via a 8-port switch and each PC has more than 1 LAN card.
There is one PC running [Winform: Server role] and 5 others running the [Winform: client role]. In [Winform: Server role], I'm using following code to obtain local ip address and port number and the [Winform: Server role] will listen to all incoming TCP requests according to these auto assigned ip address and port number.
Dim Listener As System.Net.Sockets.TcpListener
Dim Client As New System.Net.Sockets.TcpClient
Dim Message As String = ""
[Code]....
I need to clarify my intention. My current approach to my intention maybe incorrect. I attempt to create a 'zero configuration client-server networking' and that is plug & play. The server will know where the client and vise versa. I know there is a program (i.e. MaxiVista) has done that exactly.
MaxiVista has 2 applications, i.e. server and client. Users only need to execute the server application in PC designated as server role and execute the client application in another PC designated as client role. Then the server will be able to find all executing clients in the same LAN.
My intention is just that. Plug and play 'zero configuration client-server networking' within the same LAN.
I'm looking for a way to assign a number to either a picture box or label. Not sure what one i will be using. Would it be something like this?
[Code]...