VS 2008 : Warning - 'functionDealWithHiddenFields' Doesn't Return A Value On All Code Paths
Nov 21, 2009
i get a warning " 'functionDealWithHiddenFields' doesn't return a value on all code paths. A null reference exception could occur at run time when the result is used."
Example function:
vb.net
Function functionDealWithHiddenFields(ByVal HTML As String, ByVal numHiddenFields As Integer, ByVal X As Integer)
Try
[code]....
The functions still work correctly (as far as i can tell) what would i need to do to the above function to remedy that warning?
I have this VB crypter I am trying to build, but I am getting 2 warnings. I Would like some help if someone has the time. Please PM me and ill send you the crypt.Warning 1 Function 'ReadEOFData' doesn't return a value on all code paths. A null reference exception could occur at run time when the result is used. I:Usersn oahDesktopI am CrypterI am CrypterForm1.vb 189 13 I am Crypter
Warning 2 Variable 'Buf' is used before it has been assigned a value. A null reference exception could result at runtime. I:Users oahDesktopI am CrypterI am CrypterForm1.vb 203 19 I am Crypter
I have a function to recursively search through windows (and their child windows) to find specific ones, it works exactly as expected, however it causes "function doesn't return a value on all paths" warning. This is the only warning in my entire program, and although it might be silly, I'm interested in knowing if there is a way to stop this error from occurring, but still allowing the function to work properly.[code]
I'm trying to get my head around this issue, on a few of my functions i get a warning " 'functionDealWithHiddenFields' doesn't return a value on all code paths. A null reference exception could occur at run time when the result is used."Example function:
vb.net Function functionDealWithHiddenFields(ByVal HTML As String, ByVal numHiddenFields As Integer, ByVal X As Integer)
I have myself a problem here. I created myself 2 classes like the ones below:
1) Vehicles 2) SportsCars
I then created some "Properties" like the ones below:[code]I want to get the price of a selected car, but when i try to build i get the following error: Property 'Cars' doesn't return a value on all code paths. A null reference exception could occur at run time when the result is used.
What does this warning mean and how can i get it to go away.? Warning1Function 'ipAddr' doesn't return a value on all code paths. A null reference exception could occur at run time when the result is used.C:Documents and SettingsHP_AdministratorDesktopMoney Manager in MysqlMoney Manager V1connection.vb385Money Manager V1
im trying to get mac adddress from this code but i get eerror on END FUNCTION line it says this "function 'getRemoteMac' doesn't return a value on all code paths. A null reference exception could occur at run time when the result is used." what am i missing here?
I am getting the warning that the function doesn't return a value on all code paths.
Function newgradelevel(ByVal valscore As Integer, ByVal strgradelevel As String) As String If valscore >= 70 Then If strgradelevel = "Freshman" Then newgradelevel = "Sophomore" ElseIf strgradelevel = "Sophomore" Then [Code] .....
"Access of shared member, constant member, enum member or nested type through an instance; qualifying expression will not be evaluated".I have this message showing up that references this code in the keyup event:[code]I am just testing the trapping of keys right now. The code still works but I am uncomfortable with an unresolved warning.
warnings got me thinking about old issues that always goofed me up when I was writing more VB.NET code.One of them was the fact that the compiler didn't warn if you declared a Function but never did an explicit Return statement or assign to the Function name. Running Visual Studio 2008, I just made a small experimental project, and it seems as though the behavior has never been fixed.I created a Visual Basic Console application, with the following code:
Module MainModule Sub Main() Dim test As Boolean = TestWarning()[code].....
I also went into the Project Settings and turned On Option Strict and Option Explicit.I also set the Warning Configurations so that "Function/Operator with no return value" was set to Error.I compiled the project and got no warning, and no error on the TestWarning() Function. This seems like a great place to put a warning, because it will default to False, and you may have simply forgotten to do a return. C# will error without a return statement. I thought that VB.NET did the same thing with the "Function/Operator with no return value" configuration. Is this a bug, or is there something I'm missing?
Edit: Further Experimentation
Function TestWarning() As Boolean If DateTime.Now.DayOfWeek = DayOfWeek.Monday Then Return False[code].....
If, and nothing in the Else, there is also no Warning/Error. It will simply take the default, even though you likely intended (via programming style) to have an explicit return. In this case, I explicitly returned False (which is the default for Boolean), so it's likely a hidden bug that I should have returned True in the Else.
> Function LoginPass() As Boolean > Dim LogPass As New waxClass > Dim Ldt As DataTable = LogPass.LoginPass(LCase(UserName_TextBox.Text), > LCase(UserPass_TextBox.Text))
[Code]...
When I try to use the above function it gives a Warning saying:
Function 'LoginPass' doesn't return a value on all code paths. Are you missing a 'Return' statement?
I've just been burned again by the fact that there is no compiler warning when you fail to return a result in a Function that returns a Value type. I wrote the function:
Public Function CompareTo(ByVal other As MessageIndex) As Integer Implements System.IComparable(Of MessageIndex).CompareTo Me._messageIndex.CompareTo(other._messageIndex) End Function
which performs the CompareTo Function for two integers, then throws the result away and returns 0, because I forgot to either assign a value to CompareTo, or use Return, and that isn't flagged by the compiler because it's valid VB for a Value type.
I happen never to use "FunctionName = ReturnValue" because it hides information from maintenance programmers and also because I think it's insane .
Is there any way I can get the compiler to issue a warning whenever my Functions are missing a Return, whether it's a Value type or not?
When trying to compile my newly created ClassLibrary class 'Validator' that validates entries made into TextBoxs or MaskedTextBoxs, I get the following error:
Warning 1 Namespace or type specified in the Imports 'System.Windows.Forms' doesn't contain any public member or cannot be found. Make sure the namespace or the type is defined and contains at least one public member. Make sure the imported element name doesn't use any aliases. C:Users erryDocumentsVisual Studio 2008ProjectsMillerClassLibMillerClassLibValidator.vb 1 9 MillerClassLib.
Following is the first part of code in the class:
Imports
System.Windows.Forms Public Class Validator
[code]....
What can I do to resolve this problem? The classes in this class library will be used to validate forms data input in a number of varied projects.
Usually when I get an exception, the code line that creates it is marked yellow etc.. However now i only get a System.NullReferenceException as a line in the Immidiate window;
A first chance exception of type 'System.Net.Sockets.SocketException' occurred in System.dll
Is this due to some setting, or why don't I get any better indication?
i have a simple code that send an e-mail, when i try it running in debug mode it works fine, after compile, i run the exe but the same code doesn't work any more..
I'm trying to use ResolveUrl() to set some paths in the code behind of a custom ASP.NET user control. The user control contains a navigation menu. I'm loading it on a page that's loading a master page.When I call ResolveUrl("~") in my user control it returns "~" instead of the root of the site. When I call it in a page I get the root path as expected. I've stepped through with the debugger and confirmed, ResolveUrl("~") returns "~" in my user control code behind.Is there some other way I should be calling the function in my user control code behind to get the root path of the site?
I've been mostly working with VB.Net for over a year and just noticed this Am I going insane, or does VB.Net NOT have an "Unreachable code" warning? The following compiles quite happily with nary a warning or error, even though there is a return between the two writeline calls.
Private Sub BugReportsCentral_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load WebBrowser2.Navigate("http://xxxxxxxxxxx.net/update/link/on-off/threadreport.html")
[code]...
Why this code doesn't work? It doesn't print the label with the correct thing.
I have got some code that is working as i have edited the game.exe at a certain address, now i know the code can find the address, but I don't know how to make it stop searching for it if it isn't there.
here is the:
code:
So what I want to know, is how to stop this code, if the address doesn't exist.
Am I just being blind or does this If statement genuinely not do what it's meant to.[code]This displays the message box even though textSample is one of the letters. In my eyes that If statement should see that textSample is one of those letters and skip it, whereas if it was Z it would "Not" be equal to any of those and would therefore show the message box.
I am converting a VB6 program to VB express and am having a couple of problems. One of them is a problem with the variable "strEncTemp". I have the warning "Variable strEncTemp is used before it has been assigned a value", and I can't assign a value to this variable without creating issues. It also seems that a null value is being returned and the code produced by this routine is corrupt. This seems to be the last issue I have in converting the code. I tried setting it to 0 but it then shuts down the program with an error. This is the portion of code that has the warning and produces a null value. [Code]
