I am working on a project which feature many report files and when i click on them within VS 2010 to view them I am prompted the following error message "Value cannot be null. Parameter name: instance". instead of taking into the visual reprot designer. I can also provided the code for the file generating the error within the screen shot if needed.
View 5 RepliesI 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")
im 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]...
've got a function that takes two parameters (a delegate and an integer) and then creates a LINQ MethodCallExpression, which it uses to gets the results:
Public Delegate Function CompareTwoIntegerFunction(ByVal i1 As Integer, ByVal i2 As Integer) As Boolean
Public Function Test(ByVal pFunc As CompareTwoIntegerFunction, ByVal i1 As Integer, ByVal
[code].....
I 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.
I'm using VS2010, vb.net, .net framework 4.0, and SQL Server 2008 Express on Windows 7 Pro with all updates installed. I have developed a website that uses memberships, profiles, and roles. I allowed the built in providers to create the aspnetdb.mdf file for me in the App_Data folder. I added a number of my own tables to aspnetdb.mdf so I would have a single database for all my site's data.
I am hosting the site on my own server. It uses Windows 2003 Server, IIS 6, SQL 2008 Express, and all of my software including the OS is up to date with the the latest servicepacks, updates, and all of the .net framework updates including 4.0. There are no updates left to install and I'm sure that my issue isn't due to a missing update or framework version.
I copied the aspnetdb.mdf and .ldf files from my app_code folder to the sql server express folder on my server and attached the database. I do this because I don't want the file to autoattach, because I will likely use a commercial hosting service in the future. I added a sql server user with ownership rights to the DB. strong text
I then modified my connection string in web.config to point to the UNC of my SQL Instance on my server and to authenticate with the sql server username and password that I set up with ownership rights to that database. I updated my membership, role, and profile providers in my web.config file to use the new sql connectionstring and I was sure to include the application="/" setting and to use before each provider.
I can run the site just fine from my development machine. I can log on to it and use all of its features. However, when I publish the site to my server I can access the site, both locally over my intranet and over the internet. I can navigate around on it and it retrieves all of the data from the tables that I added to the database myself, but when I try to log on to it or to create a new account (basically anything that uses memberships, roles, or profiles) the site crashes with the error and all of the data below.
I've checked to verify that the application name in my aspnetdb database is in fact simply "/". I've ensured that I'm running from an application pool that is using the 4.0 framework. Much of the googling and reading that I've done seems to indicate a problem with my providers, but I can't understand why it works perfectly on Casini (or whatever the development server is called) on my local machine but crashes on my web server. In both cases they are connecting to the same database.
I would be so grateful if anyone could tell me what I'm doing wrong here. Following are the full error displayed by my server when the site crashes and also what I feel are the relevant sections of my web.config file.Full content of error message and relevant sections of web.config are below:
Server Error in '/' Application.
Value cannot be null.
Parameter name: type
[code]....
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 have it setup to error and stop if no name, and I want it to do the same if no format (via radio button) is selected. I can get the error to come up, but the code continues and outputs a null anser.
Private Sub BtnCalc_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles BtnCalc.Click
Dim CurrentRental As Decimal
[code].....
an error message when I am trying to load the data into a listbox and the value in the table is NULL. I am new in programming and I am using vb2005 Here is my
[Code]...
I'm using an interop dll in a VB.NET project to get access to some functions in a MFC project.
Dim bIsSupposedToWork As Boolean = True
Dim api As API = GetObject(, "MyProject.API")
[CODE]...
Why?
Dim ipAddress As Net.IPAddress Dim serverSocket As New TcpListener(ipAddress, 8080) this error comes out.. Value cannot be null. Parameter name: localaddr
View 3 RepliesI got this error in the following line.
Dim t As New TrialMaker("TMTest2", Application.StartupPath & "RegFile.reg", Environment.GetFolderPath(Environment.SpecialFolder.System) & "TMSetp.dbf", "Phone: + 9999999999" & vbLf & "Mobile: + 99999999999", 1, 10, _
"745")
I 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?
I am getting an error when I write a value to the database. it tells me "Key cannot be null. Parameter name: key". However the key is an auto-increment value and i'm not even writing to that field. I have verified that there is a value being sent to the SQL. I also created a seperate program that writes the same SQL statement to the db and it writes just fine. I also have other places within the same program that write to the database without any problems.[code]
View 17 Repliesi'm having some problems here.i try to put in some data into sql server by using vb code. the data types are small integer and unsigned tinyint.i would like to assign the value as NULL instead of '0' because my reading takes 0 and 1.i tried in this way.
Dim Ignition As Integer = Nothing
Dim ADCCount1 As Integer = Nothing
Param = New SqlClient.SqlParameter("@Ignition", Ignition)[code].....
when i viewed my sql table i found that the Ignition and FuelRead1 show 0.previously i tried to set the value to NULL but it showed error.What should i assign the ignition and ADCCount1 so i will obtain NULL in database?
Following is the code where i am getting the "Value cannot be null. Parameter name: Key" exception.
I cant see anything wrong in this code.
ReadOnly Property dvMeasurements() As DataView
Get
Dim dvMeasurementsRet As DataView = Nothing
[Code]....
How can I detect null value of sql parameter?In VB6 IsNull(), in VB.NET its return error
View 5 RepliesIn the following fragment I want to set vID2 to NULL (and not to 0) if mID2 is an empty string. How do I do this? There is apparently no OleDbType.Null
cn.Open()
strTemp = "INSERT INTO tbShips (vNew_b, vID, vID2) VALUES(?, ?, ?)"
MyCommand.Connection = cn
MyCommand.CommandText = strTemp
With MyCommand.Parameters
[Code]...
The problem started when I changed a multiline rich TextBox WordWrap to false..I'm not sure whether I attempted this when the program was running or not. The error list recorded the location as 0, 0.I have attempted to trace the problem by removing the <System. Diagnostics. Debugger StepThrough()> _ attribute in the Sub InitializeComponent located in the Designer module. However, nothing indicates there is a problem within that module.Since this situation occurred, I cannot initiate a ToolStripMenuItem_Click event procedure, located within a pop-up menu, by a right-click of the mouse. I have since attempted to reinitiate the error and the only way I can revisit this error is by changing the WordWrap of the RTB whilst the program runs, but no error is respectively listed or initiated within either the error list or designer module. If the program is running - without an attempt to reinitiate the error - I'm unable to run the pop-up menu.
View 1 RepliesI have a VB.net application that has been built for awhile. I recently added a barcode in active reports 6 to one of the reports. everything works fine on my machine as well as others, but a select few get an error relating to the following: [Code] Do I need to update the mscorlib.dll on the users machine? I'm not sure why this error is happening.
View 1 RepliesI tried to execute a code that will display Book Titles in alphabetical order within a list box and received an ArgumentNullException (Value cannot be null. Parameter name: item) error.
Dim strBook As String
Array.Sort(_strBookTitle)
For Each strBook In _strBookTitle
Me.lstDisplay.Items.Add(strBook)
Next
I've been upgrading my vb6 app to VB.NET and so far everything was going on smoothly until this morning. I'm getting this message : value cannot be null. parameter name context when trying to save or when adding new controls. It's kind of a random error, it does not always happen when saving or adding new controls
View 6 RepliesValue cannot be null. Parameter name: stream
Can anybody assist my code?
Me.PictureBox1.Image.Save(memStream, System.Drawing.Imaging.ImageFormat.Jpeg)
Dim imSource() As Byte = memStream.GetBuffer
Dim imStatus As Integer = publicStream.Read(imSource, 0, streamLength - 1)
imSource.GetValue(memStream.ReadByte)
am a beginner for vb.net, i was using the WROX book to start of with vb.net.In that i had an example code which i tried to work out but i got an error like this one ,am jus creating an array and adding it into the list value cannot be null.Parameter name:item
[Code]...
I have some code which gets child items for a menu via the GetChildren function which takes a list of menuData: Dim builtMenu As New List(Of MenuData)(_rawData.FindAll(Function(item) item.GroupingID = 0))
For Each menuData As MenuData In builtMenu
If menuData.Children IsNot Nothing Then
menuData.Children.AddRange(GetChildren(menuData))
End If
Next
If I check if menudata.children isnot nothing, it always is nothing because the GetChildren function is yet to run (providing the child items, which do exist). If I remove this check and just have this code:
Dim builtMenu As New List(Of MenuData)(_rawData.FindAll(Function(item) item.GroupingID = 0))
For Each menuData As MenuData In builtMenu
menuData.Children.AddRange(GetChildren(menuData))
Next
Then I am presented with a Object reference not set to an instance of an object error on menuData.Children.AddRange(GetChildren(menuData))
Following code doesnt work and raise error "A parameter is missing. [ Parameter ordinal = 1 ]".What s wrong with it?I am developing pocket pc application in vs 2008 and sqlce 3.5 sp1.
[code]....
Upon loading my project i get this error and says "Instances of this error (1)" and shows the Call Stack as follows
at System.ComponentModel.TypeDescriptor.TypeDescriptionNode.GetRuntimeType(Type objectType)
at System.ComponentModel.TypeDescriptionProvider.GetRuntimeType(Type reflectionType)
[code].....
I've searched for an answer and found some c#-examples, but could not get this running in vb.net:
I thought of something like the following[code]...
I know, I can create a new instance with the Activator.Create... methods, but how to create an array of this type or just declare a new variable?
How can i check if an output parameter is null before i bind it to a asp literal, and if it is null i want to just make the literal [code]...
View 1 RepliesI think this is a pretty basic question, but I just want to clarify. If I have a variable with a null value, and pass it as a parameter that is optional, will the parameter get the null value, or the default value?
dim str As String = "foo"
dim obj As Object
//call 1
[code].....