I've spent a substantial amount of time trying to figure this out, but I keep getting the same error
A first chance exception of type 'System.Data.OleDb.OleDbException' occurred in System.Data.dll A first chance exception of type 'System.NullReferenceException' occurred in project1.exe
This happens when I try to use the DataReader.my code is
Public Function Identification() As List(Of Integer) Dim returnIndex As New List(Of Integer) Dim dbCount As String = "SELECT Bookingid FROM bookdetail WHERE Date =" & getCurrentTimeString() & " 12:00:00 a.m." Dim count As Integer = 0
I have a large project where we have 2-3 dll projects that are converted from VB6 to VB.NET. We have fixed all the issues that caused compilation errors, and most of obvious issues in running, so now we have basically a program up and running. The exe is created from scratch in VB.NET, using a lot of functionality from the converted dll's (including GUI forms). What I wonder is when I run the program in debug mode, I get a bunch of warnings in the "Immediate Window" saying:
A first chance exception of type 'System.Exception' occurred in Microsoft.VisualBasic.dll
...and some of other type (but most of them in Microsoft.VisualBasic.dll).I was wondering if this is common in projects converted from VB6, or if it is caused by bad design in our code...
I am using VS 2008, Office 2007, and Win7 Home Premium on my system.I have a simple application which should be a breeze to build. All I am attempting to do is pull data from an Access database with four small tables into a data grid on a windows project. Should be simple, set up the data connection, choose a datagrid from the table in the data source view, drag it onto the page and done, right?I can't get it to work. It will all work fine until I attempt to run or debug the project. The data will not show up. The data grid does, but I get this error: A first chance exception of type 'System.InvalidOperationException' occurred in System.Data.dll
As I said, the project seems to build fine, but it will not pull the data. After the initial build I get the message that Windows will show this page in Compatibility View. Is it something with Win7 Home Premium, or a setting somewhere?
I have the following code running, the first time I change the selected index, everything runs smoothly. However, if I try to change the selected index again, nothing happens and the subcategories combobox values do not change.
Private Sub cboMainCategory_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cboMainCategory.SelectedIndexChanged '* make sure the combobox is fully loaded
I am working on a card game, and i get this werid error:
A first chance exception of type 'System.Reflection.TargetParameterCountException' occurred in System.Windows.Forms.dll
The code that is cousing this error is:
Private Delegate Sub ShowcardDelegate(ByVal test As String, ByVal objtest As Object, ByVal value As Boolean) Private Sub Showcard(ByVal test As String, ByVal objtest As Object, ByVal value As Boolean) If objtest.InvokeRequired Then
I'm converting another project from VS2003 to VS2010 and am getting this message in the Immediate Window before I hit my MyBase.Load. From the warning, it looks like somting is undefined yet is being used - causing an exception. How can I trace this down?My app uses 2 DLLs, could the msg be coming from them during their load?
I have a text string like this which I will need to parse: FriMar1200:00:00EST2010 And I used the following Date.ParseExact("FriMar1200:00:00EST2010", "dddMMMddHH:mm:sszzzyyyy", Nothing) And it is giving me a A first chance exception of type 'System.FormatException' occurred in mscorlib.dll error.
Dim setting As My.MySettings lvl As Integer Dim xp As Integer Dim xpt As Integer
[code]....
I have done the settings as type integer and set the values that I wanted but I get this error: A first chance exception of type 'System.NullReferenceException' occurred in Click Game concepts.exe
I have this issue with casting....is there anyway i could pass an integer into a label...this is what i have done so far but i am getting this error "A first chance exception of type 'System.InvalidCastException' occurred in Microsoft.VisualBasic.dll"
Dim firstNumber As Integer Dim secondNumber As Integer
I am trying to perform a simple bound connection between an Access database and a text box on a form. This is actually Chapter 18 of the "Microsoft Visual Basic 2008" book.I get the same error message when trying to create my own project "MY ADO Form" or the "ADO Form" project supplied from the DVD provided with the book. I am running the 90 Day Trial Version of Visual Studio 2008 with SP1 and Net 3.5 SP1.
My operating system is the 64 bit Version of Vista with all updates.The error when I try to run the application in the debug mode is:"A first chance exception of type 'System.InvalidOperationException' occurred in System.Data.dll"and as a result no data shows up in the text box from the database and the data selection bar is grayed out in the form. The underlying database "Students Data Set" appears to be fine as I have seen the correct data for the fields "Instructor" and "PhoneNumber" prior to running the program and when connecting with the database.
A first chance exception of type 'System.InvalidOperationException' occurred in System.Windows.Forms.dll It displays in my Immediate Window when i run my program, I'm using a text reader to read a number of XML files using background worker...most the time it stops so something is wrong but sometimes it works fine.
In my project I'm trying to get the caption property of serial ports available on computer. But when I run this code below I get "A first chance exception of type 'System.InvalidCastException' occurred in Microsoft.VisualBasic.dll" exception. I tried putting "Option Strict On" and then I'm getting build error saying it disallows Late binding.
what does "A first chance exception of type 'System.InvalidOperationException' occurred in System.dll" means? it occur after the bold sentence of my program.
Dim count As Integer = 0 Dim missing As String = "Missing Ingredient:" For Each strStore In strDownload If Not strDownload Is Nothing Then
Brief of my project: Taking attendance using RFID reader and RFID passive tag. Main tasks:
1) Scan a Tag and Tag ID is transmitted to GUI.
2) Tag ID is matched with Student ID in database.
3) Successfully matched Student ID is displayed on GUI and LCD.
When i had experienced this problem, student ID was only display on UI but not LCD. After that, my system hang. This happened only when the data of tag scanned is taken from text file through OpenFileDialog. Manually add of data via UI just work fine.
i am receiving the following error message when I debug my application, and I do now know what the problem is. This code has worked before but I don't know why.A first chance exception of type 'System.Net.WebException' occurred in System.dll
I have a project that I am working on and I just recently transfered it from an XP machine to a Windows 7 machine. Both machines are running VB Studio and the only thing that changed was I moved it from the XP machine to the WIndows 7 environment. I have not changed any of the code, I just transfered it and ran it to make certain nothing happened.
Do While rdr2.Read() Dim var1 As String = rdr2.Item("Week").ToString Dim var2 As String = rdr2.Item("L1").ToString Dim var3 As String = rdr2.Item("L2").ToString
It generates the following error: A first chance exception of type 'System.Data.SqlServerCe.SqlCeException' occurred in System.Data.SqlServerCe.dll
Interestingly, if I use a numeric value for the variable it for LSArraytemp, it writes to the database no problem at all.
I have several ActiveX controls in my project one of them loads solidmodeling files for viewing. Because this process can take some time the authors provided an OnFinishedLoadingDocument event.This worked fine under VB6.Now however under VB.NET 2008 framework 3.5 I get an exception thrown When I try to access a form control from this event.
Quote:
A first chance exception of type 'System.InvalidOperationException' occurred in System.Windows.Forms.dll I found an article that says something about it.
Quote:
If you are using ActiveX controls on a form, you may receive the cross-thread InvalidOperationException when you run under the debugger How can I add text to my control from this event?
Code: Private Sub oView_SW_OnFinishedLoadingDocument(ByVal sender As Object, _ ByVal e As AxEModelView._IEModelViewControlEvents_OnFinishedLoadingDocumentEvent) _ Handles oView_SW.OnFinishedLoadingDocument Dim nSheet As Integer = 0
it says "The type initializer for 'System.Transactions.Diagnostics.DiagnosticTrace' threw an exception."
Private Sub BtnLoad_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnLoad.Click Dim Con As New OleDb.OleDbConnection Dim DbProvider As String
I am running vs 2008 and and trying to connect to an sql server 2005 to do userauthentication, but the error message i get is"Access to the registry key 'HKEY_LOCAL_MACHINESOFTWARESmartinfoLibServer' is denied" and the message "A first chance exception of type 'System.UnauthorizedAccessException' occurred in mscorlib.dll" also shows in the immediate window.
I get this message each time I run the appA first chance exception of type 'System.NullReferenceException' occurred in <Applicaton>I have isolated the key Subs which seem to upset it, but I cannot for the life of me figure out what it is about it that's upsetting it. I have used On Error Goto etc for the time being, which gets around it but I would like to solve it rather than jumpver it.Err.Description returns "Object reference not set to an instance of an object."My sub looks like this:
