VS 2008 Fix ActivationContext Cannot Be Null Error?
Sep 9, 2010I have built my project successfully but when I run App. I get error message:value cannot be nullParameter name: activationContext
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Get An Error System.ArgumentNullException Was Unhandled, Value Cannot Be Null. Parameter Name: ActivationContext
Feb 25, 2011I'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.
Recompile ActivationContext Error
Sep 7, 2010I just recompiled an app that I have been using for some time after upgrading a component. I am getting a deep down error. The debugger does not highlight anything in my code. [code]...
View 1 RepliesVS 2008 - Null Reference Error
Sep 18, 2009I am testing a program, and I am getting a null reference error at this line. oParent.Invoke(oParent.cUpdatingSolidWorks, iSolidWorksItem). I have stepped through the program, and all the items are created. A watch window with the three objects all have data in them. I am wondering what would cause this error if the objects exist. [Code]
View 5 RepliesVB 2008 - Lists And Null Value Exception Error
May 10, 2009I have one list that pushes to another list. Think of a shopping cart situation. If you double-click on the white area after the list of items in the first window, I get a null exception error when I push the info to the second window. How can I avoid that error??
Existing Code is below...
Private Sub lstBooksAudio_doubleclick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lstBooksAudio.DoubleClick
If lstBooksAudio.SelectedItem = "" Then
MsgBox("Please Click on an item.")
[Code] .....
VS 2008 Getting A Null Exception Error Intermittently
Dec 30, 2009I'm hoping someone can assist. I'm still learning VB so excuse my lack of knowledge. The below code is a mashup of a code snippet I found that effectively reads from an SQLite database. The initial code snippet consisted of a textbox for input, a textbox for output, and also consisted of a datagrid to store the contents and a button to activate the lookup.
[Code]...
[2008] Null Reference Error - Store Values In Arraylist Permanently
Jan 22, 2009I have a module and form. Module has a structure.
[Code]...
Actually values are not stored in that array list permanently. its storing temporarily and then destroying. i want to store that values in that arraylist permanently.
Error 'Arguement Null Exception Was Unhandled, Column Arguement Cannot Be Null'?
Oct 20, 2011I am trying to create a treeview in VB.net, the data has to be loaded from MSAccess 2010 database. When I try to run this program I get error : Argument Null Exception was unhandled, 'column' argument cannot be null and the program crashes. I have pasted the code as under:
Imports System.Data.OleDb
Public Class frmRating
Private Sub frmRating_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles
[code].....
VS 2008 Null Error "NullReference Object Was Unhandled"
Jan 14, 2010[Code]...
VS 2008 Null error "NullReference object was unhandled"
VS 2008 Access The Access Database - Error "Value Cannot Be Null - Parameter Name: DataSet"
Mar 29, 2009I am trying to utilize the access database, but I'm getting an error message: Value cannot be null. Parameter name: dataSet
[Code]...
That's the code I'm using, why I'm getting this error?
For Each ... Get Next Null Error
Feb 27, 2009i am trying to find the loctaion of an item in an array but ecah time i run the for each next loop i get a null error. code follows:
[Code]...
Keep Getting Null Error
May 20, 2011I keep getting the "Object reference not set to an instance of an object." error and it tells me to check if the pp(f, 0) object is null .... which I know it is not.[code]...
View 3 RepliesError Pop Ups When There Is Empty / Null Value
May 7, 2010I am getting the attached error when any cell in a row is empty. How to avoid this error and to accept the null values?
View 4 RepliesError When Field Is NULL
May 2, 2010I using ADO to get som values from a SQL DB one off the fields can have the value NULL And if i use:
txtinfo.Text = RS(
"info").value
Then i get an error.I have try with IS NULL - but that dosn't work
XML Null Reference Error?
Jan 4, 2010Im trying to write code that will insert 'records' into an xml file, but everytime i click the button to make the changes to the XML file, it throws a null reference exception, ive gone through this code must be 100 times and cannot find what needs to be declared as 'new' as i know nodes can't be 'new' and the doc is 'new'
Imports System.Xml
Public Class frmuseradmin
[code]......
Error - Value Cannot Be Null. Parameter Name: String
Feb 23, 2011I get the following exception for the code shown below. The error occurs when i request access token.I downloaded the latest dll(2.3.1) from the twitterizer website.
{"Value cannot be null. Parameter name: String"}
Dim OAuthTokens As New OAuthTokens
Dim accessToken As New Twitterizer.OAuthTokenResponse
accessToken = OAuthUtility.GetAccessToken(ConsumerKey, ConsumerSecretkey, "oauth_token", "oauth_verifier")
HttpResponse Object Null Error
Nov 15, 2011MVC 3. VB.NET I have the following controller action in my application to send generated PDF files to the User by download. The function works fine when the controller itself has been invoked. But when I call to the function from outside the controller it returns a " Object reference not set to an instance of an object " error as soon as it hits the response.contenttype line. I have verified that all of the variables are in fact making it to the below action.[code]any ideas why this is only working when called explicitly from inside its containing controller???
View 2 RepliesMySQL Null Exception Error
Jun 7, 2010I am building a VB.net application using VB Express 2008 which connects to a MySQL database. Right now, I am only selecting records, but will be writing code for update / insert. I have installed the MySQL Net Connector, most recent stable build. I have set a reference to it in project references. It makes a connection and reads just fine, no issues there at all.
My problem is this: When exiting the project (via calling "End") I am receiving a null Exception error. Here is the error[code]....
Null - If Block Throwing An Error
Mar 22, 2011My code block is below. As it turns out, rdrCurrentRate.GetString(12) is a null value, but the code block throws an error. "Data is Null. This method or property cannot be called on Null values."My intention is to write "if rdrCurrentRate.GetString(12) is NOT NULL, then sCurrentRateType = rdrCurrentRate.GetString(12)"
What am I missing here?
If Not String.IsNullOrEmpty(rdrCurrentRate.GetString(12)) Then
sCurrentRateType = rdrCurrentRate.GetString(12)
[code].....
Null String Yield An Error
Sep 10, 2009I have the following code below which has an error. When the checkbox is set to true and for example change the "role", and click save the following error is given;
"Index was outside the bonds of the array".
I know the reason of the error but don't know the solution..
The TxtPayCont is a concatenation of title, fname, and lname in an array. Therefore, if all the fields have values, then it works fine. So if it is Mr Jones Tim, this works, but, if it is Mr Jones it does not. It has to have 2 spaces to work. Is there anyway round this...
(see code below)..
Code:
Pass Null Value But Error Dim Drf As Date
Jun 30, 2010i need to pass null value but error dim drf as date
[Code]....
Dim Upd As String ="UPDATE sakit set tanggalsakit'" & drf & "' WHERE orang= '" & id& "'
Run-time Error 94 Invalid Use Of Null
Apr 16, 2009Run-time error 94 invalid use of Null
View 16 RepliesValue Cannot Be Null - Parameter Name: DataReader Error
May 17, 2012im getting error when im trying to view a report from my vb2010. value cannot be null. parameter name: dataReader the following is the screenshot for my error and the codes:
[Code]...
VS 2010 Designer Error 'Value Cannot Be Null'
Apr 3, 2012I just made a bunch of changes to my program, so I can't just undo what I did. My main form gives me the following error every time I try to load the designer:
Warning1Value cannot be null.
Parameter name: objectType
I have rebuild the project with no success. A few other posts have mentioned that there could possibly be a reference to a button or image that no longer exists, but I have no idea which one.
Also, I don't really know what the information below means, but it shows up on the error page under 'call stack', so I figured I would include it
at System.ComponentModel.TypeDescriptor.TypeDescriptionNode.GetRuntimeType(Type objectType)
at System.ComponentModel.TypeDescriptionProvider.GetRuntimeType(Type reflectionType)
[Code].....
Class Giving Null Exception Error
Dec 10, 2011It's saying I cant access this object in my class. Why? I'm pretty sure Ive used this method several times before. Below is some bits of code to figure this out. Object reference not set to an instance of an object."
[Code]...
Error - Null Reference Exception Was Unhandled
Dec 14, 2009Public Class Form1
Dim int As Integer = 0
Dim CustomerTable As New DataTable
Dim instance As New InvalidOperationException()
[code].....
This is the code this exception occurs when i click on the home button of my webbrowser.or i enter any site on the combobox.
Null Exception Error When Loading Datatable?
May 20, 2010I am loading data from an excel sheet using the following code.The first test I did worked fine.But when I tried another sheet it errored on a cell that was blank"Object reference not set to an instance of an object".Even though the sheet in the first test had blank cells.I need the loop to load the blank cell in the datatable
For nRow = 1 To objSheet.UsedRange.Rows.Count - 1
dr = dt.NewRow
For nCol = 0 To objSheet.UsedRange.Columns.Count - 1
[code]...
Null Refererence Error When Writing To A File?
Oct 29, 2010i am trying to append text to a file. I have tried streamWriter, fileStream, file.writealltext, file.appendalltext every single time i get an error "Object reference not set to an instance of an object" the path is correct and when i use file.exists it says it exists?
View 2 Replies.net - VB Script CSTR Alternative - Error When NULL Value Is Passed
Dec 13, 2011CStr in VB script throws error when NULL value is passed to it, whereas CStr in VB.NET ignores null value and doesn't throw error.
Is there any other function which does same function as CStr in VB script.
Try
Dim str As String
str = Nothing
'assuming above line will set str to null.
[CODE]...
C# - Any Reference To Profilecommon Causes Error Value Cannot Be Null. Parameter Name: Type?
Aug 11, 2010I have searched for two weeks, every night, exhaustively reading forum threads and trying all suggested solutions no matter how outlandish. Just as is the case with the many many forum threads about this same issue, the site works fine on my development machine. It deploys with no errors. It works from the production server and reads data from the database, but when it attempts to access a profile it crashes with this error.
A number of posts say to check or uncheck an option called "remove app_code.compiled file" but apparently this was a Visual Studio 2005 option. It is nowhere to be found in Visual Studio 2010. A number of posts say to make sure the App_Code.dll is present in my bin directory. It is present. I've deleted the app_code.compile file manually to see if that made any difference. I've changed the target framework from 4.0 to 2.0 and 3.5. I've completely deleted the site in IIS, created a different folder with a different name and redeployed the site with every combination of "allow this precompiled site to be updatable" and "Use fixed naming and single page assemblies".
i've included references to System.Web.Profile and System.Web and System.Web.Profile.ProfileCommon. I've created a new, fresh website targeting .net framework v4.0 and copied that web.config file to my application and recreated my profile entries to ensure that I didn't jack anything up in the config file along the way.