I've only build simple applications that calculates something, like nuclear half life or ice cream prices, by using some values entered into text boxes by the user.
At the moment I'm trying to build a simple edition of Notepad because I want to learn how to read and write to .txt files. And I followed a web example at [URL]
So far I've only written the reading part and my code looks like this:
Imports System.IO
Public Class Writer
Dim FileName As String = Directory.Text + File.Text
Dim TextLine As String
[Code]....
The message I get when I click "Debug" is saying: InvalidOperationException was unhandled
InnerException: Use the "New" keyword to create an object instance.
Does anyone know how to deal with this because I think the code is alright, and I get no lines under any part of the code...
All of a sudden, when I built my project, it wouldn't read any changes, then all of a sudden, this error started popping up!The description of 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.and it pops up when the following code is executed:
frmMain.Show()
on the line prior to it I have the code
frmStats.Show()
and that pops up no problem.These errors happened suddenly, and all I was changing in the code (which was in frmMain) were just a few changes to labels (activated by an event).
I get the following expeption when trying to switch from one form to another (click event):
InvalidOperationException was unhandled
An error occurred creating the form. See Exception.InnerException for details. The error is: Could not find any resources appropriate for the specified culture or the neutral culture. Make sure "WindowsApplication1.CarDimensions.resources" was correctly embedded or linked into assembly "Driver Seat Configuration" at compile time, or that all the satellite assemblies required are loadable and fully signed.
How can i embed one form correctly into the another?
i am in project of medical billing.i am on LogIn form in vb.but i have Erro - "InvalidOperationException was unhandle " and while i was run program it didn't say which line i had error.
here is my code.
Imports System.Data.OleDb Public Class login Inherits System.Windows.Forms.Form
I am working on an application with a friend and I am getting an error.The error says:
System.InvalidOperationException was unhandled Message=An error occurred creating the form. See Exception.InnerException for details. The error is: The process cannot access the file 'C:UsersAdministratorNotesWebSiteNotes.txt' because it is being used by another process. Source=Website Notes
[code]....
Now I know why it is throwing this error but nothing I do will stop it from showing up.At the top of our form we have a module that we use to check if a file exists on the computer and if it doesn't then it will create the file.I have tried accessing that module from the form load event but with no luck as it still throws the error.
at my visual studio class we made a data base program! i was using VB 2008 on a win xp x86 machine i copy the project on a usb stick because i want at home to work on visual aspects! my pc have win 7 x64 and now my project doesnt work! it shows me an error i cant get to the second form from project!here is the error:
System.InvalidOperationException was unhandled Message="The 'Microsoft.Jet.OLEDB.4.0' provider is not registered on the local machine." Source="System.Data" StackTrace:
I need to make Mastermind for school (vb.net).It must work as single-player (thats already finished), but we also must make it work multiplayer. We got the server with the task, and don't have to program its ourselves.I can't find why I get this error.
'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?
I am working on a program that opens forms from within the startup form. It is doing nothing usual that I am aware of. It was working fine an hour ago but now when I try to open one particular form I get the InvalidOperationException and I have no idea why. I've rebuilt the project, restarted VS2008 and restarted the computer. The other forms open without any trouble.
I got the error after I added forms from another project into a new project. Theres no error in my code so it doesn't show where the error occurred.. out and explain what this exception means?
I am having the following error in VB 2008:System.InvalidOperationException was unhandled Message="An error occurred creating the form. See Exception.InnerException for details. The error is: Object reference not set to an instance of an object."
I'm upgrading from Windows XP 32-bit to Windows 7 64-bit, and I'm using VB in VS 2008. Under XP, I used the Task Scheduler to run a program at 3pm every weekday, and it ran fine. Now in W7, when the Task Scheduler runs the programs, it encounters an exception when it gets to the code MyForm.ShowDialog(). The error is:
System.InvalidOperationException was unhandled Message="Showing a modal dialog box or form when the application is not running in UserInteractive mode is not a valid operation. Specify the ServiceNotification or DefaultDesktopOnly style to display a notification from a service application." Source="System.Windows.Forms"
[code].....
When I run the program from a shortcut with the same parameters as in the Task Scheduler (i.e. the shortcut runs the .exe file with some paramters after it), it runs fine, so I'm guessing there is some setting in the Windows 7 Task Scheduler I need to set, but I can't find it. I've tried checking "Run with highest privledges" (and unchecking it), but that didn't help. I have tried it with the "Hidden" box unchecked and checked and that didn't help. I've also tried it with "Configure for" set either way (Windows 7 or Vista). So how do I get rid of this error?
ok so i viewed some other question that are ruffly the same and i am still confused, here is the stacktrace
at Game3.My.MyProject.MyForms.Create__Instance__[T](T Instance) in 17d14f5c-a337-4978-8281-53493378c1071.vb:line 190 at Game3.My.MyProject.MyForms.get_Character_Creator() at Game3.My.MyApplication.OnCreateMainForm() in C:UsersMasonDocumentsVisual Studio 2010ProjectsGame3Game3My ProjectApplication.Designer.vb:line 35
[Code]...
also, where is game3.my.myproject, obviously its a line of code but what is it in.
I'm a beginner in VB.net, I'm trying to develop P2P based Chat application from this thread. The chat application has server side and client side. Serverside items: Form1.vb, BB_Server, RTS_Listener, and RTS_SocketClient. And for Clientside items: Form1.vb, BB_Client, RTS_SocketClient. Below is the code of simple form I tried to build. I'm still trying to establish a connection for the server, so the form only has txtDisplay, txtSend, and btnSend controls.
I've searched the Internet and found this to be a common problem, but couldn't find an example like mine, so didn't manage to find a solution that works.I have a DGV where the columns are added at design time and the rows are added programmatically using a simple loop. Here it is:
vb For Each iRow In iDS.Tables(0).Rows If iRow("rIndex").ToString = rIndex.ToString Then myDataGrid.Rows.Insert(count) myDataGrid.Item(0, count).ReadOnly = True
I am trying to do an assignment for a programming class. The program works for items that are in the list boxes, but when I test one that is not (and a message box should then pop up) I get this error message instead.ArgumentOutOfRangeException was unhandled the InvalidArgument = Value of '5' is not valid for 'index'Parameter name = index
Here is my code...
Private Sub displayShippingButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles displayShippingButton.Click Dim isFound As Boolean
I was doing my project and came across an error (The I/O operation has been aborted because of either a thread exit or an application request) regarding this
"Private Sub SerialPort1_DataReceived(ByVal sender As Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles SerialPort1.DataReceived If closingdown = False Then received = SerialPort1.ReadTo(vbCr & "R") 'Motion port receiving data. needs a vbCR & "R" is sensor out is an ASCII "R" followed by three characters (which is the distance measured) End If"
So I'm trying to create a login which connects to a database which I've already created on db4free.net and already installed the connector. But as soon as i run it I have an error saying
'You have an error in your SQL syntax; check the manual that corresponds to your MySql Server version for the right syntax to use near '& Password WHERE Username = 'alan' AND 'Password = 'duong" at line 1
Imports System.Data.SqlClient Imports MySql.Data.MySqlClient Public Class LoginForm1 Dim MySqlConnection As MySqlConnection Private Sub OK_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OK.Click [Code] .....
How does one handle unhandled exceptions in a DLL? VS doesn't give me the option to add Application Events, I'm guessing because it's a DLL. Do I just have to do it in the main app?
I brought this up with VS 2008, and nothing anyone told me worked. No matter what settings I tried, or how many times I slammed the computer against the table, VS would still break on all errors rather than just unhandled errors. Perfectly maddening. I'm having the same problem with VS 2010. But, this time I can't find a setting that at least lets me pretend that it's supposed to work.
I have a simple form that when filled out with a case # will return the name of the person that is handling the case. I am getting an error on any machine that does not have VS 2010 installed on it. The error is when ever the user uses the close button (the red X) at the top right of the form the following error is generated:
System.InvalidOperationException: Collection was modified; enumeration operation may not execute. at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
When i add an attachment to my email and click send i get an error.
Error : smtp exception was unhandled Line : SmtpServer.Send(mail) Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Working with an If statement I have tried the following
If -0.6 > (LLum_Gline(8).X - LLum_Gline(12).X) > 0.6 Then patient_frm.llum_gline = 2 MsgBox("Measurement is Abnormal") End If
I am getting an error message that says Argument out of range exception unhandled. I have double checked and verified that LLum_Gline(8).X and LLum_Gline(12).X are in fact valid.Is my problem simply in how i am phrasing the If statement. Is there a way for me to phrase what im doing without writing multiple if statements?
