I am using 2005 and I am getting a ArgumentNullException when I try and debug my program. I have included the error and a piece of the code. I am not sure how to fix this error at all. If more of the code is needed I can post it.
Public
Class MainForm
Dim sPIServer As String 'PI Server Connection Storage Variable
Dim myServer As PISDK.Server 'Variable to hold the server to work on[code].....
I have written an MDI text Editor and I have written a "save" sub routine, please see below
'This sub routine updates the current document or calls the save as routine
Private Sub SaveToolStripButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SaveToolStripButton.Click, SaveToolStripMenuItem.Click
[code]....
I am testing this sub routine today and it throws up an error during runtime when a new document is created and the user (me in this case) writes a few lines of text, I click the save toolstrip button and because its a new document, the save as sub routine is supposed to be be invoked, however the application stops running and I get this error message "ArgumentNullException was Unhandled" from Visual Basic.
[code] I'm basically trying to see if a record already exists. My problem is when I run this I get a "ArgumentNullException was unhandled" error It occurs on the line "dbAdapter.Fill(output)" in the sub.
View 5 Replieswhy this gives an error at run-time:
Dim mightBeNothing As List(Of String) = Nothing
Dim a As List(Of String) = IIf(mightBeNothing Is Nothing, New List(Of String)(), New List(Of String)(mightBeNothing))
I am getting ArgumentNullException on the second line. If I replace the last part with:
Dim a As List(Of String) = IIf(mightBeNothing Is Nothing, New List(Of String)(), New List(Of String)())
It works - but the constructor New List(Of String)(mightBeNothing) will never be called if mightBeNothing is nothing, so what is the issue?
i have an ASP.NET page which has a numebr of user controls within it. There are 2 user controls which are of interest. I need to display either one of them or neither of them, depending on the record selected previously.
In the user controls I need to set properties of some controls which are in a FormView. So in my user control code-behind I have a number of properties which look something like this:
[Code]...
I've been having problems with following code on some computers, while it's worked super on others (most):
Dim xmlSer As New System.Xml.Serialization.XmlSerializer(GetType(XMLContext))
which produces the stacktrace:
System.ArgumentNullException: Value cannot be null.
Parameter name: type
at System.Xml.Serialization.XmlSerializer..ctor(Type type, String defaultNamespace)
How can that code throw that exception, when the argument is drawn from a gettype call, and note that it doesn't happen when debugging on my own PC, only when it's installed on some of the client PC's???
I'm trying to debug an application as I did before using vb6. Placed a break point in the code and run. when it hits the breakpoint I tried to modify the code but, it does not allow it.
I got a message saying Changes are not allowed in the following cases:When the debugger has been attached to an already running process The code being debugged was optimized at build or run time
The assembly being debugged is loaded as domain-neutral
The assembly being debugged was loaded through reflection
I'm getting the following exception when I try to run up my Winforms app and haven't been able to find a solution to it:
System.ArgumentNullException was unhandled
Message=Value cannot be null.
Parameter name: activationContext
[code]....
I've added a handler for the "unhandled error" event in the applicationevents class but it never reaches that stage and there is no source code running that I can break into and diagnose.
The application was fine until I added a user control (nothing fancy, just a standard windows user control) and then dragged it onto a form in the app (user control and form were in the same application). The application builds and compiles without any errors or warnings but when I attempt to run it up I get the above error straight away.
Does anyone have any idea what it could be or even how I can go about investigating it? I'm a bit stumped on this one as I'm not sure how to investigate it. I removed the user control from the form and then I removed the user control from the application entirely but the error hasn't gone away. In all honesty the addition of the user control might be a red herring but the problem manifested straight after adding it.
I'm using visual studio 2010 express(.net 4.0) and I can't seem to be able to debug my program as x86 platform.?
View 3 RepliesI am getting this error when I try to debug the application, when I build it it is correct.
Dim c As New Integer
c = 0
c = ds.Tables("scan").Rows.Count() {here I get the error}
Here is the false?
I have a VS 2008 Solution in VB.Net that has 2 projects - a Launcher and the App. The Launcher is what runs first, checks to make sure the App has all the latest files from the network, etc. and then launches the App. The Launcher allows the user to select their environment (Test, Production) then passes those values into the App.exe as command line arguments.
This works fine when running normally, but when trying to debug this, I'm trying to figure out how to start Debugging from the Launcher, then pass the selected Environment into the other project so it can read them as command line arguments.
I am trying debug my program on a Windows 7 machine. My program reads a txt file using TextFieldParser
I get an error message when I try to open a file
Could not find file C:UsersBillDesktopprogram name TextFieldParserinDebugFileName.txt.ReadColumns
Code
Dim safeFileName As String = IO.Path.GetFileName(Me.OpenFileDialog1.FileName)
Using myReader As New Microsoft.VisualBasic.FileIO.TextFieldParser(safeFileName)
It doesnt get past the second line, which tells me there is something wrong with the way i am getting the file??
I am not getting the location of the file just the file name
What this program does is it it moves the firewall tab on my Zonealarm from Medium to High thru a 2 timers and I can put how long for it to say on High and how long to stay on Medium
[Code]...
When i debug the program and open it(inapp.exe) in notepad there a line
C:UsersendroitDocumentsVisual Studio 2008ProjectsDataTypeDataTypeobjDebugDataType.pdb
Well, is there any solution or way not to include that line when debug. I know that .pdb is important in debugging, but when the app published still there's that line. Can we disable it or there's no other way.
I am not exactly sure what I am doing wrong. I need to convert Me.xCommissionLabel.Text = Format(Me.xCommissionLabel.Text, "currency") to a toString, so it displays a dollar sign, 2 decimal places. so I did this. Me.xCommissionLabel.Text = commissionLabel.ToString(CType("C", IFormatProvider))When I run the program and input the data I get: A first chance exception of type 'System.InvalidCastException' occurred in Commission Project.exe. [code]
View 7 RepliesFollow up to Direct access to full string representation of object.
I am trying to log the contents of an object to a text file. I can get the property-value pairs I want to log by executing this line in the immediate window[code]...
i am using visual studio 2005 on win 7 with office 2007.i have developed win application. i am using microsoft activex spreadsheet component in my program. so it automatically creates reference to AxInterop.OWC11.dll But when i run program in debug mode (open program and click RUN in toolbar it works) it works. But if i run directly .exe (go to bin release doubleclick .exe) it gives error at loading point of that component. It says "Attempted to read or write protected memory. This is often an indication that other memory has been corrupted." An unhandled exception occurrs.AxInterop.OWC11.dll is in release directory.Is this office 2007 error or Win 7 ?
View 2 RepliesI am working on a project in Visual Basic .NET 2010 on Windows 7 SP1 that previously ran fine in Windows XP SP3 but has recently started crashing immediately upon running the executable. I have made several additions/changes since the last time it was tested on XP, so it is difficult to pinpoint what might be the problem. (I commented out all of the start form's _Load event, which causes the form to load with no events triggered in the IDE, but the program still crashes in XP, so I suspect it's something other than my code, though I don't know what else could have changed to trigger it.)
[Code]...
I've been having a bit of a problem using the while function.
Here is my code (Simplified):
Dim RandomNumber3 As Random
Dim RandomOutput3 As Integer
[CODE]..............
When running the debug, the program crashes, and when I step into the program, I find that this While statement becomes an infinite loop. This is a program that uses random number generators to assign a value to something, and this while statement is necessary so that there is never two of the same values showing (RandomOutput, RandomOutput2 & RandomOutput) Have to be different to one another.
How do you open the autos window for debug in vb .net 2010?
View 2 RepliesSimple question that does not seem to be covered: If I use a lot of Debug.WriteLine statements in my code, will they be completely absent in my production version?
I mean: Is the compiler smart enough to not emit any code for those calls? Or would I have to surround them by #if DEBUG..#end if directives?
when i attempt to debug a program in visual basic studio 08 the black screen dissapears immediatly and i cannot read anything that appears. not sure if it is an option or a bug, but it makes the system relatively useless.
View 4 Repliesi need to make somthing to do the same as the program debug view, trace messages of a program and etc.
View 4 RepliesI have o problem on my codes sqldr = sqlcmd.ExecuteReader when i debug the program error says ExecuteReader requires an open and available Connection. The connection's current state is closed. i dont know what its means that error..
View 1 RepliesI cant figure why the VB JIT Debugger control transfers the error to the program when I run in Debug mode and goes on in an infinited loop... I am using VB.NET 2008 and MS Access as the database backend.What I am trying to do here is that whenever I catch an exception (I have some C# code dll added to this main program and it should catch the unhandled exception and the addhandler routine will follow suit. So the moment any unhandled exception is caught MyHandler method is invoked and I need to take the backup of the database (Delete if the original file exists, copy the *.bak file as the original file name(was created during new file development) ,name it as *.mdb ) show a customized messagebox warning the user to abort (custom crash dialog instead of the standard default one)Somehow Myhandler goes in an infinite loop stop at line Globals.startBackup inside Private Sub MyHandler..Any idea on this weird AppDomain.Unhandled exception and how to prevent this from happening? [code]
View 1 Repliesi have a problem with my code: [code] At the bold part, when i goto debug my program i get the error "Conversion from string "TrueFalse" to type 'Boolean' is not valid."
View 3 RepliesI have a simple chat program i have made, it works but with a few errors.
1st if it can't find the physical pc it is trying to connect to it crashes.
2nd if it finds the physical server but not the program (server) running it says "the computer actively refused the connection on IP/Port" and then crashes.
Code for connect button:
IP = txtboxip.Text
Port = txtboxport.Text
[CODE].....................
Had this matter on Xp machine and visual studio 2010 ultimate after windows update between december and january: even the simplest windows form program crash on start when starting for debug (inside Ide, F5) unless putting breakpoints on each line of the autogenerated (and marked as "debugger step thorugh") code.(see: [URL]) I was wondering if this matter affects only Xp machines, or if someone with Seven or Vista had same matter.
View 2 RepliesI have the following codes:
me.hide()
staff.show()
It run smoothly for the first time,but when I execute it for the second time,it occured the following errors:Unable to copy file "obj\Debug\FYP.exe" to "bin\Debug\FYP.exe". The process cannot access the file 'bin\Debug\FYP.exe' because it is being used by another process.
I have the line in vb code:#if Not Debug which I must convert, and I don't see it in c#?
Is there something equivalent to it, or is there some workaround?