Error = NullReferenceException Was Unhandled By User Code?
May 11, 2011Error occuring at line: SqlDataSource3.UpdateParameters("TechID").DefaultValue() = CInt(technicianRow("TechID"))
Here is full VB code:
[code]....
ADVERTISEMENT
Getting Error In Code As Initially Array List Is Null / NullReferenceException Was Unhandled
Oct 19, 2009The code below is used to check if the application setting, an arraylist is populated or not via the count method.
When running the program fails with error "NullReferenceException was unhandled" as initially the setting (arraylist) will contain no values.In similar circumstances I would declare a new instance of the object or set value to string.empty or check if DBNull.
I know application settings have a save method but to reference/load them one is not needed.I also left the value field in the projects -> settings to be empty.[code]...
Error - NullReferenceException Was Unhandled
Jun 3, 2009I have made a tic tac toe board and when i go to debug the application i get a "NullReferenceException was unhandled".
this happens diring this part of the code:
Dim x As Integer = Val(index.Chars(0))
Getting A NullReferenceException Was Unhandled Error
Jun 3, 2009I am getting a NullReferenceException was unhandled error when i run my debugging in this part of my code: Dim x As Integer = Val(index.Chars(0))
what can i do so this will stop and my program will work?
Error - NullReferenceException Was Unhandled (VB 2010)
Jan 3, 2011I have the follwing codewhich transfer the value from NumericUpDown64 to the array Conc(0,0) which is part of the structure USerInput:
UserInput.Conc(0, 0) = NumericUpDown64.Value
When I run the program I recieve the NullReferenceException was unhandled. Object reference not set to an instance of an object.
Error Saying:"NullReferenceException Was Unhandled
Apr 8, 2009Im getting an Error saying:"NullReferenceException was Unhandled - Object reference not set to an instance of an object."I have no idea what this means as a beginner,
Me.FilmTableTableAdapter.Fill(Me.DVDDatabaseDataSet.FilmTable)
Dim con As OleDb.OleDbConnection = New OleDb.OleDbConnection("Provider=Microsoft.jet.oledb.4.0;data source=|DataDirectory|\DVDDatabase.mdb")
Dim cmd As OleDb.OleDbCommand = New OleDb.OleDbCommand("SELECT * FROM FilmTable", con)
con.Open()
[Code]...
Stuck At The Error NullReferenceException Was Unhandled?
Mar 25, 2011Private Sub btnSendMsg_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSendMsg.Click
Dim con As New OleDb.OleDbConnection
[code].....
VS 2005 'NullReferenceException Was Unhandled' Error?
May 11, 2009I am slowly getting used to working with classes and for the most part am getting things to work. This problem has me stumped though. Below is an abbreviated version of the code. The form class is:
HTML
Public Class Form1
Private Lines As New List(Of DblLine)
[code].....
Error : ArgumentOutOfRangeException Was Unhandled By User Code Value Of '-1' Is Not Valid For 'Value'
Mar 27, 2011I Was Coding A Tabbed Web Browser With A Progress Bar In Visual Basic 2010 Express Edition. I Started De-Bugging The Browser When It Pointed To This Sub: Private Sub Loading(ByVal sender As Object, ByVal e As Windows.Forms.WebBrowserProgressChangedEventArgs)
ToolStripProgressBar1.Maximum = e.MaximumProgress
ToolStripProgressBar1.Value = e.CurrentProgress
End Sub
And Showed This Error Message: ArgumentOutOfRangeException Was Unhandled By User Code Value of '-1' Is Not Valid For 'Value'. 'Value' Should Be Between 'Minimum' And 'Maximim'
Debugging Error "NullReferenceException Was Unhandled'
Jan 21, 2011Debugging Error "NullReferenceException Was Unhandled'. I have the following code on my form
[code]...
VS 2008 Stuck At Error NullReferenceException Was Unhandled
Mar 26, 2011[code] this is my code n i want to store data at runtime in the my database.i used data base as an access07 and my platform is vb.net..Now come to the point when i run the project it terminates when i'm inserting my data in the access file.[code]
View 4 Replies[2008] Error Message Saying NullReferenceException Was Unhandled
Jan 19, 2009My code
Dim pointer As Integer, index As Integer
For pointer = 1 To 6
For index = 0 To 5999
[CODE]...
All i get is an error message saying NullReferenceException was unhandled the bold part is were it says the error is
Error - Nullreferenceexception Was Unhandled While Pulling Connection String From App.config
Aug 3, 2011getting connected using an app.config instead of hardcoding since yesterday evening and I either can't find any more info on the net that helps or I'm too new to understand it all. The exception is occurring on the line assigning the connectionstring to 'returnvalue'.
Imports System.Configuration
Imports System.Data.SqlClient
Public Class Form1
[code]...
System.Data.OleDb.OleDbException Was Unhandled By User Code ErrorCode=-2147217900 Message=Syntax Error In INSERT INTO Statement
Jul 8, 2011I cannot seem to figure out why VB keep throwing me this exception but here is the code
[Code]...
Error - NullReferenceException Was Unhandled - Object Reference Not Set To An Instance Of An Object
Apr 15, 2009I'm finishing up working on the high score list of my Jeopardy game. The only problem that I'm running into is when I try to start from scratch without a textfile in the Debug folder.I get a NullReferenceException was unhandled - Object reference not set to an instance of an object. I get this message with the line If (myPlayers.Length - 1) > 2 Then just before I start to compare the scores and reorder the list by score if necessary.I already declared myPlayers as an array of structures in the beginning of the form.
Private myPlayers() As Players
It writes the name and score to the file, but then gives me that error. My goal is to only fill the file with the three players names and their scores.I figured since the file doesn't exist, I'm doing something in that specific code that effects my reference to myPlayers but I can't figure out what exactly. I tried adding
If (myPlayers.Length - 1) > 2 AND File.Exists("highScore.txt") Then
but its still giving me the error.
'read in scores, add scores to file or create new file if neccessary
If File.Exists("highScore.txt") Then
Dim InputFile As StreamReader
[code]....
.NET - NullReferenceException Unhandled?
Sep 19, 2011This never happened to me, and the less data one has (usually) the less you can say what happened.I am trying to write a simple query analyser. I randomly receive these kind of crashes:
[Code]...
The file specified above does not exist. The place where it crashes is wrapped with Try-End Try. Moreover, yes, I have the painting event set up but it should not concern it (or maybe it does?). I have to add that I use visual basic express edition. The error occurs ocasionally - sometimes when I'm lucky nothing happens, and when I'm not then I get this crash.
NullReferenceException Was Unhandled
Jan 25, 2012vb
Imports System.Windows.Forms.HtmlDocument
Public Class test_vbdotnet
Private Sub runtime()
[Code].....
I want VB.NET to get access to the innerText and make a if statement out of it. But it always returns error. (see the comments for details.)
NullReferenceException Was Unhandled?
Nov 30, 2010This is driving me slighty madder than i usually am. The thing thats bugging me is the EXACT same code works in a test project i did with an sdf database.See my comments in the code
vb Private Sub tbScan_KeyUp(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles tbScan.KeyUp
[Code]...
.net - InvalidOperationException Was Unhandled By User Code
Oct 14, 2011I am trying to save changes made to a list(of xxx) in a function... Am I over looking something because it barfs on the UpdateModel(e) with saying:
[Code]...
IndexOutOfRangeException Was Unhandled By User Code?
Oct 8, 2009i have a string with data when i tried to retrive character by character in a for loop but the size of the string is just 256 but the actual size is more than that... as soon as it passes 256 it throws IndexOutOfRangeException while its printing well in msgbox. I have removed newline, tab using
details = details.Replace(vbCrLf,
"")
[code].....
InvalidOperaionalException Was Unhandled By User Code
Oct 15, 2011I have this problem.. I keep getting this error: Cross-thread operation not valid: Control 'ListView1' accessed from a thread other than the thread it was created on.
Here is my code:
Imports System.IO.Directory
Imports System.IO
Public Class Video_to_Mp3
[code]....
InvalidOperationException Was Unhandled By User Code?
Aug 23, 2010'm tryng to execute code from the DoWork event of a background worker but get the following error:InvalidOperationException was unhandled by user codeCross-threadoperation not valid: Control 'RTB_SndMsg' accessed from a thread other than the thread it was created on.How can i fix this error?
Imports System.IO
Imports System.IO.StreamReader
Imports System.IO.StreamWriter
[code]....
NullReferenceException Unhandled For Combobox1?
Dec 10, 2010on Form1, i have a combobox1 where i have 15 values. im using a case statement with those 15 values to decide what is the next form to go to. i need to make sure the user cannot add in his own text to it or click the NEXT button without having any value at all. how do i add these "exceptions" to my code?
i would think any exception would go before the case so that it could tell you didnt put in the right answer before it looks through the case statment and give you a nullexceptionhandler reference.
VS 2005 NullReferenceException Was Unhandled
Aug 20, 2010I am working on my project with the listbox, I am reading the strings through the text file and split the strings to input them on the listbox.[code]When I selected the item on the listbox, I get the error.Error: Object variable or With block variable not set.
View 11 RepliesSystem.MissingMemberException Was Unhandled By User Code
Apr 28, 2010I'm using this code:
[Code]...
VS 2008 Webexception Was Unhandled By User Code?
Apr 9, 2009im running the following bit of code in a background worker and it is coming up with the following error
"The remote server returned an error: (503) Bad sequence of commands."the code is My.Computer.Network.DownloadFile(strFTP & aryfiles(i), My.Settings.strLocalTemp & aryfiles(i), strPUserName, strPPassword, False, 100, True) It runs fine the first time through but 5 mins later when it runs again it always throws this error.
[VB 2010] InvalidCastException Was Unhandled By User Code
Dec 10, 2011I use this code to populate combobox1&2:
'Main form on load events
Private Sub frm_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
[Code]....
.net - Visual Basic: NullReferenceException Was Unhandled?
Nov 9, 2011I can't work out what's causing it. The error report says "Object variable or With block variable not set." for the line "allSlotLabels(i).Image = imgCherries". This line is no different from the other, so I guess it's just the error it picked up first after randomly generating the number.
[Code]...
Adding Row To Database And Get NullReferenceException Was Unhandled?
Sep 6, 2009Using Visual Basic 2008 Express Edition, and trying to set up code for an Add button to add a row to an SQL database. The code below is copied from the Help, and modified to reflect the fact my dataset is called Test_SQL_DbDataSet, my table is called Details, and just 2 columns at the moment .. "ID" and "Detail"
Dim newDetailsRow As DataRow = Test_SQL_DbDataSet.Tables("Details").NewRow()
newDetailsRow("ID") = "10"
newDetailsRow("Detail") = "Maint"
Test_SQL_DbDataSet.Tables("Details").Rows.Add(newDetailsRow)
When I select it, I get a "NullReferenceException was unhandled" error saying "Object reference not set to an instance of an object"
Forms :: System.NullReferenceException Was Unhandled
Jun 22, 2011System.NullReferenceException was unhandled
Message=Object reference not set to an instance of an object.
Source=Image Invoice Management
[Code]......
i do understand that the list count is 0 so shouldn't it be declairing Start_Pos = 0