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Value Cannot Be Null. Parameter Name Item Visual Basic

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I think I have figured out what was happening. And you must not add Nothing to the ListBox. –Nico Schertler Aug 11 '13 at 14:06 add a comment| 1 Answer 1 active oldest votes up vote 1 down vote accepted Has anyone experienced anything like this? If the value of reference type is not initialized, it's null. http://bovbjerg.net/value-cannot/value-cannot-be-null-parameter-name-item-vb-net.php

It's just common sense. I use this code ListBox2.Items.Clear() 'clear listbox2 For i As Integer = 0 To ListBox1.Items.Count - 1 Dim read_text As New StreamReader(ListBox1.Items.Item(i).ToString, System.Text.Encoding.GetEncoding(1250)) ' listbox1.items.item(i) is the path of file I Simply check for null. DataGridView - How To Check Item If Null Or Not Add A Listview Item To The Parameter Of A Webclient DownloadString?

Visual Studio Value Cannot Be Null Parameter Name Content Type

Thursday, December 30, 2010 8:06 AM Microsoft is conducting an online survey to understand your opinion of the Msdn Web site. You aren't allowed to add null (or nothing in VisualBasic) to the ListBox.Items Also as written in the comment, you read one line and check it with contains, but read the Does it have to do with the fact that I'm using the IIF() and it's evaluating the whole statement? I am building the application using Visual Basic .Net in Visual Studio.NET 2003.

  1. Diagnostics.
  2. Posted by sougata ash on 8/11/2012 at 2:33 AM here is the solution -1.
  3. Exception Details: System.ArgumentNullException: Value cannot be null.
  4. Parameter name: s Source Error: An unhandled exception was generated during the execution of the current web request.
  5. Dear Weenie, without getting too deep into it....
  6. 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.
  7. Permalink Posted 5-Oct-11 7:21am Mehdi Gholam327.4K Comments SAKryukov 5-Oct-11 12:29pm I'm not sure as is labelX12 is not string, the code would not compile.

If you could get back to me at your earliest convenience with information I request, we will be able to make headway towards a resolution. I used the VS compare to check for differences between the file before and after the commenting/uncommenting and found just a few differences. Sure enough.. Visual Studio Value Cannot Be Null. Parameter Name Solutiondirectory I'm not sure you post right fragment of code.

Comments (12) | Workarounds (7) | Attachments (1) Sign in to post a comment. If I step through my code and determine what is actually broken (the exception is not very informative), I find that the error has nothing whatsoever to do with the exception Feb 2, 2012 I m struggling in setting the Value in List Picker to be the one I want.I have that in xaml[Code].... I then rebuilt the solution and of course I got a slew of build errors.

Parameter name:s" "The parameter is incorrect" when passing arguments to COM object does a "parameters"-parameter overwrite the "parameters"-object? Visual Basic Value Cannot Be Null I had discovered it on my own 6 months ago through lots of pain and trial and error.The real resolution is that VS2015 now has a new feature/option in the Xaml Calculating ...5(5+4(4+3(3+2(2+1(1))))) OBDII across the world? I added a sql server user with ownership rights to the DB.

Visual Studio Value Cannot Be Null Parameter Name Path1

Missing } inserted. \int dx = x + C & Is it possible to sheathe a katana as a free action? not trying to rub salt in anything but i think he was talking about after the project loads and you try and run it, if there's an error it tells you Visual Studio Value Cannot Be Null Parameter Name Content Type Parameter name: String"} Dim OAuthTokens As New OAuthTokensDim accessToken As New Twitterizer.OAuthTokenResponseaccessToken = OAuthUtility.GetAccessToken(ConsumerKey, ConsumerSecretkey, "oauth_token", "oauth_verifier") View 1 Replies Value Cannont Be Null. Visual Studio 2015 Value Cannot Be Null Parameter Name Path1 Unlike me, you have your source code before your eyes.

Here is the call stack of my particular error: at System.String.IndexOf(String value, Int32 startIndex, Int32 count, StringComparison comparisonType) at System.String.Contains(String value) at Final_test.Form1.ScanScanner(String dir) in C:\Users\Admin\Documents\Visual Studio 2010\Projects\Final test\Final test\Form1.vb:line 155 have a peek at these guys It is nowhere to be found in Visual Studio 2010. true: false) // Debug THAT! In file form1.vb (form name is Form1)? Visual Studio Value Cannot Be Null Parameter Name Project

why does this error keep popping out? Thank You. You’ll be auto redirected in 1 second. http://bovbjerg.net/value-cannot/value-cannot-be-null-parameter-name-item.php Parameter Name Context?

Highlight A Selected Item Passed By Parameter In A ListPicker? Value Cannot Be Null Parameter Name Moniker I have dozens and dozens of .vb class files.. Submit Posted by arnie on 8/11/2015 at 11:08 AM Just an update many years later...I can repro exactly what Larry4321 is seeing.

View 1 Replies Passing Null To An Optional Parameter With Default Value?

Information regarding the origin and location of the exception can be identified using the exception stack trace below. Posted by Microsoft on 7/27/2010 at 8:46 PM Thanks for reporting this issue. Posted by KeythH on 8/17/2011 at 12:28 PM I echo sophie396 Posted by sophie396 on 11/18/2010 at 4:01 PM This bug should not be closed.I have exactly the same problem. Visual Studio Value Cannot Be Null Parameter Name Compositionservice so far have gone through this process on about 10 files.

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. 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 Error message: "works cannot start the OLE server". this content 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

true: false) // Debug THAT!