Error: MSDatasetGenerator Failed. Failed To Generate Code Object Reference Not Set To An Instance Of An Object

Jul 28, 2009

I created a typed dataset a day or so ago, then I added a whole bunch of tableadapter/tables with some relationships etc... suddenly out of nowhere it decides my dataset "is not defined". everywhere in my code where i use this dataset now has an error.  I tried not to pull out my hair and do a Clean then Rebuild solution... out of nowhere it just refuses to generate code. Object reference not set to an instance of an Object. It would be nice if it was my object so i could find it but it's not.

Curiously I also lost the little database icon on the dataset in the solution explorer.I can still open it in the designer and preview my queries etc... it just wont make the code. it's driving me insane. anyone got a solution?

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Line Of Code Is Generating This Error - Object Reference Not Set To An Instance Of An Object?

Aug 14, 2010

with datagridview1

while looping through all the cells

i am trying to allot a cell value to another cell value basing on some conditions
& finally delete one column.my code is as fallows

Dim i, x As Integer
i = 0
x = Me.DataGridView1.Rows.Count[code]....

error i am getting is : Object reference not set to an instance of an object.it is extremely surprising for me the same code has worked nice for me but why & how the same line of code is generating this error.

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Fill_Text Code Throws An Error : System.NullReferenceException:Object Reference Not Set To An Instance Of An Object

Apr 18, 2010

I got the following code from the demo code samples and just changed the textbox names. But it throws an error:

Private Sub Fill_TextBox()
Dim Num As Integer
Dim DSet As DataSet

[code]....

The error is:

System.NullReferenceException:Object reference not set to an instance of an object.

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Event Handler Code Cause A Object Reference Not Set To An Instance Of An Object. Error (only Present On Live Server, Ok On Dev)?

Mar 4, 2010

Here is the code for the button click event;

Protected Sub CompetenciesButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles CompetenciesButton.Click
Dim con As String = WebConfigurationManager.ConnectionStrings("foo").ToString()

[code].....

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An Error Occurred Creating The Form. See Exception.InnerException For Details. The Error Is: Object Reference Not Set To An Instance Of An Object?

Apr 30, 2009

WTF, here's my code...

Public Class Form1
Dim BIT01 As Integer = BIT_01.Text
Dim Value As Integer = TB_OutPut.Text

[code].....

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Initialising New Label In Code - Object Reference Not Set To An Instance Of An Object

Nov 28, 2011

I'm converting an application from VB6 to VB.NET, and am required to declare and initialise some controls in code (control arrays). I have it declared globally, so other forms can access the data stored within them, and then I try to manipulate them inside the Form_Load() sub:

Public lblDataZone() As Label
Private Sub Form_Load() Handles Me.Load
lblDataZone(0) = New Label

[code]....

The error I get says "Object reference not set to an instance of an object". I feel like I'm missing something huge here, but what's wrong with it?

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Error System.NullReferenceException Occurred - Object Reference Not Set To An Instance Of An Object

Jan 12, 2010

i am using VB.net 2003 and i am trying to get the number of rows of a dataset from form1 into form2 in order to use it for something else and i am getting the error"System.NullReferenceException occured...Additional information: object reference not set to an instance of an object"...my code is like this:in form1:Public x as integer= me.dataset.table.rows.count here it gives me the error

in form2:
dim frm as new form1
msgbox(frm.x)

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Error: System.NullReference Exception: Object Reference Not Set To An Instance Of An Object

Jan 5, 2010

I am getting this error when I try to print my report. Here is my print code.

Private Sub PrintToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles PrintToolStripMenuItem.Click
Dim Print_Dialog As New PrintDialog

[code].....

Here is my error: System.NullReference Exception: Object reference not set to an instance of an object.

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VS 2008 - Error With Arraylist In My.Settings - Object Reference Not Set To An Instance Of An Object

Mar 14, 2010

The issue is when I try to add a new item to the ArrayList with the following code, it gives me an error:

vb Private Sub btnLabelAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLabelAdd.Click
Dim result As String = InputBox("New Filter Label:", "Label List")

[CODE]................

Object reference not set to an instance of an object.

I'm not really sure what I'm supposed to be doing with this. It's a new setting I just added and it's empty, so I'm not sure if that has anything to do with it or not. Anyone know what's going on and what needs to be done to get it to accept a value and not want to be "initialized"?

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VS 2008 Error - System.NullReferenceException: Object Reference Not Sent To An Instance Of An Object

Oct 23, 2009

I have recently gotten my hands on a free, open-source IMAP connection API.So far, I have been successful in creating a connection to one of my accounts.Where I'm getting stuck is retrieving folders and/or emails from those folders.Does there happen to be anyone here that is familiar with this API, or even Gmail (particularly the folder structure for IMAP)?

If not, here is a link to the DLL that is listed on sourceforge and the company's website that created it (if you feel like testing):

Koolwired
Sourceforge - Koolwired API

I have created a test account so feel free to use the code below without worrying about username/password issues; I'll just delete it when I'm done with it.Here is the code I have made so far for making a connection:

Dim gSession As New Koolwired.Imap.ImapConnect("imap.gmail.com", 993, True)
Dim gAuthenticate As New Koolwired.Imap.ImapAuthenticate(gSession, "imap_test@serysoft.com", "imap_test")
Try

[code]....

When I run that code, I get an error that states:System.NullReferenceException: Object reference not sent to an instance of an object. (The bold line in the above code).

Now, I'm not sure exactly what that means. Does that mean it tried to access the server and "INBOX" doesn't exist so it gets returned a NULL value? Or is it possibly the coding itself?Maybe the Gmail folder system is weird due to the fact they use labels (even though from what I have read online, the labels act as the folders in the IMAP system).

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.net - Getting An ASP.NET Error System.NullReferenceException: Object Reference Not Set To An Instance Of An Object?

Oct 30, 2011

I am completely new to ASP.NET and VB as well as C#. I am trying to add customers to a contact list out of a DB. Then the list can be referenced to call them up. But when I try to run it I get System.NullReferenceException: Object reference not set to an instance of an object. In line 19.

Here is my code:Page 1 is default page...it connects to the database and grabs the contact information and allows me to select the current contact and add them to a listbox on a separate page:

Imports System.Data
Partial Class _Default
Inherits System.Web.UI.Page

[code]....

The error occurs on line 19 (For Each customerEntry As DictionaryEntry In Customer) in the second set of code from the default2 class.

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Application - Getting An Error Stating Object Reference Not Set To An Instance Of An Object

May 2, 2010

I am making an application that takes information from the textboxes and saves it to a sequential access file or text file named checkfile.txt. I have the textfile in the proper location within the project folder.

I am getting an error stating Object reference not set to an instance of an object.

And this part of the code is highlighted

CODE:

Here's the code:

CODE:

Attached image(s)

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Asp.net - Nested Repeater Error: Object Reference Not Set To An Instance Of An Object?

Jul 28, 2011

I am taking some code that I have used for a nested listview before and trying to make it work with a nested Repeater but I am getting an error.

System.NullReferenceException: Object reference not set to an instance of an object.

.aspx
<asp:Repeater ID="reMainNav" runat="server">
<HeaderTemplate><ul></HeaderTemplate>[code].....

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Error - Creating The Form - Object Reference Not Set To An Instance Of An Object

Apr 13, 2012

I'm having this problem with my code and cannot seem to get past it although it was working fine before. The error is "An error occurred creating the form. See Exception.InnerException for details. The error is: Object reference not set to an instance of an object." The code is:

CODE:

I am trying to get information to be pulled out of a database and show in text boxes on another form (frmviewsdets). The error occurs when it gets to the line frmviewsdets.txtsnumber.Text = rdr("StudentNumber") and even when a breakpoint is applied there it just moves on to the next and so on.

I have tried to show frmviewsdets before I pull the data out of the database beut I get the same message.

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Error - NullReferenceException Was Unhandled - Object Reference Not Set To An Instance Of An Object

Apr 15, 2009

I'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]....

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Error: System.NullReferenceException: Object Reference Not Set To An Instance Of An Object

Aug 12, 2011

I am coding in vb.net. At times the data is empty/null this is due to user's input into the db.i will like to bypass it, however i get no luck.here is snippet of my code:

If hct.mydbvalue.name IsNot Nothing Then
dr("mydbvalue") = hct.mydbvalue.name
End If

I still get an error: System.NullReferenceException: Object reference not set to an instance of an object.is there a way if it is a null value to not do anything?

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Get The Error 'NullReference Exception' - Object Reference Not Set To An Instance Of An Object?

Feb 7, 2011

When the following executes, I get the error 'NullReference Exception' - Object reference not set to an instance of an object. TestClass has Get and Set methods for the integer property TestWord.How should the following be changed to let me set TestWord in six elements of TArr?

Dim TArr(5) As TestClass
For i As Integer = 0 To 5
TArr(i).TestWord = i * 10
Next

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Login Error: Object Reference Not Set To An Instance Of An Object (NullReferenceException)

Jul 9, 2009

I'm currently building this website which consist of a few webpages.

1.) Login Page
2.) Menu Page
3.) Add Application Page
4.) Search Application Page

My login is working fine, but occasionally when I start to run and debug the prog, it will stop running and point to this error. This is my login page

Partial Class Admin
Inherits System.Web.UI.MasterPage
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim ans As String = Session("Status").ToString()

[code]....

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Nested Tabcontrol - Error - Object Reference Not Set To An Instance Of An Object

Apr 7, 2011

I am using VS2008 and vb.net.I have a nested tabcontrol.

tabControl 1 and tabControl3

In tabControl3 I am trying to populate a text control with a value from a control placed on tabControl1.

' add a savings tabpage
Dim strSavingsPage As String
Dim dblTaxRate As Double

[code]....

The complete error is: NullReference exception was unhandled Object reference not set to an instance of an object.

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Visual Basic Error Object Reference Not Set To An Instance Of An Object?

Sep 25, 2011

I have this visual basic error and i was wondering if anyone could help.Private Sub SearchToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SearchToolStripMenuItem.Click

[Code]...

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VS 2008 FindControl - Error : Object Reference Not Set To An Instance Of An Object

Sep 15, 2010

What is the problem in below code.

d Public Sub filltextbox(ByVal dlist As String)  Dim tb As TextBox = CType(Page.FindControl(dlist), TextBox)  tb.Text = "hello"  End Sub

Error : Object reference not set to an instance of an object.

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Asp.net - Error Occurs : Object Reference Not Set To An Instance Of An Object?

Dec 17, 2010

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

[code]...

The following error occurs : Object reference not set to an instance of an object.

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Asp.net - GridView Error: Object Reference Not Set To An Instance Of An Object

Jun 7, 2012

have a gridview with template fields, one column contains a dropdownlist that should be populated with a sql statement. I have created the grid dynamically and called the rowdatabound in order to access the dropdownlist but I keep recieving the error: Object reference not set to an instance of an object.

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False">
<Columns>
<asp:CommandField EditText="Add" ShowEditButton="True" />

[Code]....

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Assigning A Value Error: Object Reference Not Set To An Instance Of An Object.

Aug 8, 2010

I am trying to assign a value to serialize to XML via a class (below) but keepgetting the following error: Object reference not set to an instance of an object.

Here is the line that generates the error:

Dim iTranList As New InvestmentTransactionList
With iTranList
.DTSTART = Date.Today.ToString

[Code].....

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Error Message: Object Reference Not Set An Instance Of An Object

May 11, 2009

I got this error in the following line.

Dim t As New TrialMaker("TMTest2", Application.StartupPath & "RegFile.reg", Environment.GetFolderPath(Environment.SpecialFolder.System) & "TMSetp.dbf", "Phone: + 9999999999" & vbLf & "Mobile: + 99999999999", 1, 10, _
"745")

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GridView Error: Object Reference Not Set To An Instance Of An Object?

Oct 11, 2010

have a gridview with template fields, one column contains a dropdownlist that should be populated with a sql statement. I have created the grid dynamically and called the rowdatabound in order to access the dropdownlist but I keep recieving the error: Object reference not set to an instance of an object.

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False">
<Columns>
<asp:CommandField EditText="Add" ShowEditButton="True" />

[code]....

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Object Reference Not Set To An Instance Of An Object. MySQL Error

Apr 19, 2011

so i've been looking around for days trying to fix this but can't seem to find a right solution. I'm trying to make a login/registration system. Right now, It reads things from my database FINE but it doesn't add the information to my database. It returns "Object reference not set to an instant of an object.".

[Code]...

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VS 02/03 Combo Box - Error 'Object Reference Is Not Set To An Instance Of An Object'

Aug 15, 2011

I'm trying to add some features to a program my company has developed over the course of several years and I'm having trouble setting the combo box to the proper index. I have successfully populated cmbIGDefaultSpacer with the color options that are available but can't manage to have it set the current color as the index. (I can, however, display the current color in a text box, so I know that the necessary values are being passed to the form.) The error I get is 'Object reference is not set to an instance of an object.' in regards to this line:

[Code]...

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VS 2005 - Error: Object Reference Not Set To An Instance Of An Object

Sep 4, 2010

i have this code in asp.net 2005 page under vb codes on myreader.Read gives me "variable myreader is used before it has been assigned a value a null reference exception" and in the ex msg " object reference not set to an instance of an object".

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VS 2008 : Error - Object Reference Not Set To An Instance Of An Object

Dec 5, 2010

I create one function to run any select query. and return the OdbcDataReader type.But some time if there is no data it through error : Object reference not set to an instance of an object I need to know how i can control if there is no data.

Public Function Select_From_AnyTable(ByVal sqls As String, ByVal ConStr As String)            Dim conn As OdbcConnection            conn = New OdbcConnection(ConStr)            Dim cmd As OdbcCommand = conn.CreateCommand()            conn.Open()            cmd.CommandText = sqls            Dim reader As OdbcDataReader = cmd.ExecuteReader            While reader.Read()                Return reader            End While            conn.Close()    End Function  Dim ei As OdbcDataReader = Select_From_AnyTable("SELECT loginname from usertable limit 1", conStr) msgbox(ei.item("loginname "))

If there is data it work well but if no record found it through the error.

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VS 2008 Error : Object Reference Not Set To An Instance Of An Object

Mar 21, 2010

Like every other program that you make when you code a button to open the next form it should open right. Well not in my case. I don't understand the problem that Visual Basics is not seeing my next form that I'm trying to open. When its in the Solution Explorer plain as day. Error below.An error occurred creating the form. See Exception.InnerException for details. The error is: Object reference not set to an instance of an object.show is not set to a object. All its doing is opening the next form. Ive use this code over an over. Now its giving me this C.O.S. error.

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VS 2008 Error: Object Reference Not Set To An Instance Of An Object

Nov 16, 2010

Basically all I am trying to do is to insert data entered in a text box(description) on the application form into database(sql2008) in vb.net. The vb code I wrote is below:

vb.net
Protected Sub Save_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Save.Click
Dim note As String = Description.Text

[code]....

However when I click on save button, I get following message:

System.NullReferenceException: Object reference not set to an instance of an object.

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VS 2008 Error: Object Reference Not Set To An Instance Of An Object?

Nov 30, 2010

What in this code might be causing this??This part of the code is Hilighted as causing the error.

My.Settings.Item(Holiday_" & i) = DirectCast(Me.Controls("ComboBox" & i.ToString), ComboBox).SelectedItem
Public Sub btn_Update_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)

[code].....

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VS 2010 - Error : Object Reference Not Set To An Instance Of An Object

Jun 22, 2012

I get error (Object reference not set to an instance of an object)trying to read a reg key, it stops after the first msgBox which shows MyRegKey value it shows a blank value

Dim MyReg As Microsoft.Win32.RegistryKey = Microsoft.Win32.RegistryKey.OpenRemoteBaseKey(Microsoft.Win32.RegistryHive.CurrentUser, (OldPCTxtBx.Text))
Dim MyRegKey As Microsoft.Win32.RegistryKey

[code]...

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VS 2010 : Error: Object Reference Not Set To An Instance Of An Object

Nov 18, 2011

I have a treeview with a contextmenu. I'm trying to disbable specific items in the contextmenu when the user doesn't have a node clicked, but each try gives me the same error: "Object reference not set to an instance of an object."I tried several methods in the Mouse_Down-event (IsSelected, etc), this was my last:

If .Nodes.Count > 0 Then
If .SelectedNode.Text <> "" Then ' <<< this line is highlighted
enable_expl_mnu() ' enable the contextmenu

[code]....

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VS 2010 Error , Object Reference Not Set To An Instance Of An Object

Jul 9, 2010

I get the error, Object reference not set to an instance of an object., on:

vb
For Each comboItem As String In My.Settings.ComboBox1

That code is in:

vb
Private Sub Me_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Me.Load
For Each comboItem As String In My.Settings.ComboBox1

[code]....

I am trying to get it to load those settings when the program loads up, VS does not report that program till i attempt to run in debug. Before the program is even loaded that happens.

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Jun 20, 2012

exeption: Object reference not set to an instance of an object.

code:

For Each p As Panel In Me.Controls.OfType(Of Panel)()
arr.Add(p.BackColor.ToString())
Me.Controls.Remove(p)
Next

the line:

arr.Add(p.BackColor.ToString())

how can i fix this thing?

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Aug 5, 2009

Error 1 Custom tool error: Failed to generate code. Exception of type 'System.OutOfMemoryException' was thrown. C:Documents and Settingsmiller_aDesktopFront End FCOMOctobaseOctobasefcomDataSet.xsd 1 1 Octobase

What does this mean? I have this error after i tried to add a database to my project in vb.net.If you're not living on the edge, you're taking up too much room

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Jul 5, 2011

I keep getting an 'Object reference not set to an instance of an object.' error. am trying to program my application so that a user can go on to a page where a listbox displays a list of files from an FTP site.The user should then be able to select one of the files and download it to their computer.I assume this error is relating to the listbox I am using, but I have already decalred it.

Here is my code:
<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="OutDirectory.aspx.vb" Inherits="FTPUploadSite.OutDirectory" %>

[code].....

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Nov 9, 2011

Dim iCount As Integer
Dim iLoop As Integer
Dim query3 As New MySqlCommand
Dim lvitem

[code].....

i think my error is declaration of variable type.this code is use to save imported excel file to list view then from listview, it will be saved in the DATABASE.

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Asp.net - Error - Object Reference Not Set To An Instance Of An Object

Dec 1, 2010

When I run the following code it thows the following error:

"Object reference not set to an instance of an object."

Protected Sub CreateUserWizard1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles CreateUserWizard1.Load
Dim SQLData As New System.Data.SqlClient.SqlConnection("Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|ASPNETDB.MDF;Integrated Security=True;User Instance=True")

[code]....

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May 19, 2011

why the below code is giving me the following error:

Object reference not set to an instance of an object.
Line 47: objSQLCommand.Connection.Open()

This is the problem code:

Function getTabContent() As String
Dim strUserInitials() As String = Request.ServerVariables("LOGON_USER").Split(CChar(""))
strUser = LCase(Trim(strUserInitials(strUserInitials.GetUpperBound(0)))).ToString()

[code]....

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Jan 8, 2012

I don't undertand why I'm getting this error, code was working and running perfectly earlier. I was trying to update the user's email via button. It worked fine but now for some reason it keeps giving me the error:

[Code]...

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Error - Object Reference Not Set To An Instance Of An Object

Sep 21, 2010

what the likely culprit is for an Object reference not set to an instance of an object error? I am getting it on this line of code:

lEmployee = DataServices.fetchEmployee(lEmployeeItem.itemID)

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Error : Object Reference Not Set To An Instance Of An Object

Jul 12, 2010

I am trying to save the contents of two textboxes that are updated every interval designated by my timer...I had success with this before (just using a menustripitem that called a savefiledialog, etc...) but then I decided to make the savefile code a seperate sub so I could call it on several different controls (mainly the menu strip "save datalog" click, and the "Test start" button click). Anyway, here is my code. I get the error "An error occurred creating the form. See Exception.InnerException for details.The error is: Object reference not set to an instance of an object."

Code

Public DataText1 As String = CurrentPositionValue.Text
Public DataText2 As String = CurrentForceValue.Text
Private FileName As String

[code]....

So then I change the declaration of my streamwriter as NEW systems.io.streamwriter (commented out in code near top). This then raises the error: "Overload Resolution Failed because no accessible 'New' accepts this number of arguments"

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