It's been one of those days at a programmer. Nothing going right. I am not that experienced with Visual Basic 2010 Express, but I have a random problem that appeared out of no where.This is the error I get:
HTML
Imports System.Text.RegularExpressions
Imports System.Net
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When I start to save only one record from collection, no error was found, but when I start to save more than 2 records in database table then it can save only the first record and it can not continue to save the second record.The exception was that:
InvalidOperationException was caught ExecuteScalar requires the command to have a transaction when the connection assigned to the command is in a pending local transaction. The Transaction property of the command has not been initialized.
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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 getting this error trying to open a project made in vs 2008 in vs 2010 A first chance exception of type 'System.InvalidOperationException' occurred in blah.exe The entire error looks like this
An error occurred creating the form. See Exception.InnerException for details. The error is: Could not load file or assembly 'System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.
this is the error I started getting only when I added a splashscreen to my application. Please note that I haven't added any code there - on the contrary - I removed everything from the Splash class. The issue seems not to occur when debugging - I got it from my Virtual machine - what makes the problem a bit more complicated as I have no idea which line may cause it. The problem shows up between splash_screen_dispose and main_show (when I click continue all is ok).
The details of my err. message:See the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box.
************** Exception Text **************
System.InvalidOperationException: Collection was modified; enumeration operation may not execute.
at System.Windows.Forms.Control.MarshaledInvoke(Control caller, Delegate method, Object[] args, Boolean synchronous)
at System.Windows.Forms.Control.Invoke(Delegate method, Object[] args)
[code]....
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
[code].....
I am in another Great problem, When I am running on my own machine then there is no problem creating but when I am running my project another machine then the project generating problem which caused not to open any form on running mode/compile mode. what problem is creating I attached with note file?
View 1 Repliesi am getting Error system.invalidoperationexception?
View 3 RepliesWhen I try to run my VB.net 2010 project I get the error.
"System.InvalidOperationException occured in PCDoctor.exe
Additional Inormation: An error occured creating the form. See Exception.InnerException for details. The error is: Conversion from string "" to type Double is not valid.I even tried placing break points in the startup form but this error happens before any of the startup form code is excecuted. The project was working fine before I added code to a form. I even removed this new code and tried to run the project. but still doesn't work.
I know its generally a big No-No to modify a collection that you are iterating through but unfortunately i didn't design the code that i'm trying to modify. All over the place the following is done:
for each log in Logs
logs.Delete(log.LogId)
Next
Delete pretty much just deletes the log from the database and removes it from the collection. Previously the Logs object was using a Non-Generic collection. I changed it to use a Collection(Of Log) so i can LINQify the object. Now every time i call next/.MoveNext is called after the first delete the following error happens:
InvalidOperationException:"Collection was modified; enumeration operation may not execute."
I understand why i'm getting the error but i don't understand why it never happened with the Non-Generic version. Is there anyway to get around this error? There really is no way i can take the time to change every place where the delete logs like this (codebase is large). Id like to just remove the code in the Delete function where it removes it from the current collection because i'm assuming no code does anything with the collection after its done but you know what happens when you assume.
I have a loop that will determine if a certain value is within the specification limits that I assign. The problem is, when the loop starts, I get the following exception:system.InvalidOperationException was unhandled Message=Cell provided already belongs to a grid. This operation is not valid.
I'm not sure exactly why I am getting this exception...OF COURSE the cell is already part of a grid! I just want to color it! Anyway, here is the code I am using:
Private Sub ColorAllCells()
For row As Integer = 0 to dgvCurSetLanes.Rows.Count - 1
[code]....
The exception occurs as soon as I call ColorAllCells
I defined a picture column as Image type. Created the Datasource and placed an Image control on a form. When I input the picture of a client in the input form every thing works fine but when I Open a second form (the search form) and try to search for a client with picture I get the following message:Inconvertible type mismatch between SourceColumn 'Picture' of Byte[] and the DataColumn 'Picture' of String
View 2 RepliesI have designed a application in VB.net using the MS Office spreadsheet component.When launching the app on the client PC it gives a 'Windows has encountered a problem and needs to close' error, when clicked on Debug the error says 'An Unhandled exception occured ('System.InvalidOperationException') in 'ApplicationName.exe'.The client PC runs WinXP SP3 with .NET framework 3.5 with SP1 and Office Web Components, also has Office 2007 installed.When I remove the spreadsheet componenet from the app and redeploy the app to the client it works fine!
View 3 RepliesCode:
System.InvalidOperationException was unhandled
Message="An error occurred creating the form. See Exception.InnerException for details. The
[code].....
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...
'Initialize The Database Connection'
Dim dbTRCoreDatabase As New TRCoreDatabase
'Query For Get The Employee ID'
Dim listEmployeeID As IQueryable(Of Long) = (From EmpMaster In dbTRCoreDatabase.EmployeeMasters Where EmpMaster.Email = [code]....
I 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:
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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.
This is the source:
Imports System.IO
Imports System.Environment
Module CheckFiles
[code]....
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:
[code].....
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.
View 1 Replies'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]....
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.
View 1 RepliesA VB.NET app is working on XP, but not in Win 7. User executes the program and it immediate dies with "Stopped Working". A Report.wer file was created and there's no detailed reason other than "System.InvalidOperationException".
How do I get it to tell me more. I put a messagebox in the form load, but it didn't get that far.
Since today VisualBasic 2010 express does not work any more: every time i try to run a project i got the following error:
InvalidOperationException was unhandled
Error creating the form. For details see
Exception.InnerException. Error: Exception thrown by a component outside.
[Code]...
the program I am working on works fine on my machine and a coworkers. Today I installed it using click once on another coworkers machine. It works fine on my computer and the first coworkers, but immediately crashes on two other machines. part of the error signature that it wants to send to microsoft is P9: system.invalidoperationexception
I put a msgbox right at the beginning of the initializecomponent() call and it isnt even making it that far.
Users have most up to date .net on their computers.I am stuck big time and quite worried as my company is planning on everyone using this program.
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?
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I'm making an app using wpf and vb.net in vb2010 express and having a problem. I have a timer that execute a backgroundworker every minute:
Private Sub timer_Tick() Handles timer.Tick
If Not bworker.IsBusy Then
bworker.RunWorkerAsync()
End If
End Sub
The backgroundworker is working with xmlelement and xmldataprovider:
Private Sub bworker_DoWork(ByVal sender As Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles bworker.DoWork
Dim source As XmlDataProvider = Application.Current.Resources("r1")
Dim sometext As String = "something"
Dim elemento As XmlElement = source.Document.CreateElement("elemento")
elemento.InnerText = sometext
e.Result = elemento
End Sub
Then I'm using e.Result on RunWorkerComplete to add the XmlElement to source. It works perfect the first time I execute the backgroundworker, but when the timer calls it the second time it throws a InvalidOperationException in the line "elemento.InnerText = sometext" why is that and how can I solve it?
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."
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I bound my dataset to a datagridview and when I did any changes with the data in it and try to send it to the database (pressing a Button) got the error message:"InvalidOperationException error was handled.Update requires a valid UpdateCommand (or InsertCommand depend on the action)when passed DataRow collection with modified rows."I read the related posts but they didn't solve my problem. (I have primary key in the table and the AllowUserTo... properties are set to True.)My table is very simple:
ORG
Org_id Number PK
Org_name Char
[code]....