VS 2008 Static Variable's Fault?
Jun 14, 2010
We all know what a Static variable means! Recently I came across a problem that I have no idea about! I even don't know whether I'm wrong somewhere or that is a VS fault. Whatever it is, I can't figure out the cause. Anyway, I simply opened a VB 2008 project and added 2 Windows forms to it: Form1 and Form2. Then I set Form1 as a MdiContainer by setting its IsMdiContainer property to True. Then I added a CommandButton to Form1 and put this following code into that:
[Code]...
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Apr 21, 2010
Why are static variables set equal to 0 in the declaration when 0 would be the default value of the numeric variable anyway when it's first declared? Not including the "=0" in the static declaration seems to work with no problem.
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Dec 15, 2011
I am writing a code for a webapplication in vb.net. I am using a shared variable in the vb code.
Consider the static variable value is 3 for a user who hits the web application. Again when another user hits the same web application, whether the static variable will be 3 again or whether he will have a separate value for static variable for his session?
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Jan 6, 2011
I have the following code:
Public Class TestClass
Public Sub Main()
If theGlobal IsNot Nothing Then Throw New Exception("What gives!")
End Sub
Private Shared theGlobal As Object = Nothing
[Code] .....
Why is theGlobal object NOT Nothing?
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Oct 25, 2006
How can i declare a static variable as global in vb.net?(Global static variable)
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Jan 28, 2010
I need a static variable to get a ListItemCollection from a List control (I can do this, but if I don't set it as Shared It's not preserving the values as it should). The thing is that this class is a SharePoint webpart, so I most probably will be using the webpart more than once, and I need this variable to be unique to each webpart, which shared doesn't accomplish.I tried everything you can imagine. I placed a Static variable within a Sub (shared and not shared), I tried it with Properties (also Shared and not shared)...
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Mar 12, 2011
I want to generate serial nos while i insert records in sql database like 1,2,3,4,5,6[code]...
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Oct 11, 2009
how to word this, as it is it's complex to understand the concept of the idea. Basically, I'm trying to use an interpreter pattern, based off of the code I used in php. In php the code is:
abstract class Expression {
private static $keycount=0;
private $key;
[code]......
The problem I'm having is that the static variable is blank for each child using it. How can I have it where one child increases the keycount,and ALL of the children have the new keycount variable?
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Mar 3, 2011
Here's an example of what I'm talking about...
Public Class Sample1
Public Shared Function MyValue() As Integer
Return 0
End Function
Public Sub Code()
[Code]...
Me.MyValue gives a warning in VB.NET and (the equivalent code gives) an error in C#. Is there a particular reason for this? I find it more intuitive/natural to access the shared function using 'Me.MyValue' - but I avoid it to keep my warnings at 0. Did someone else just decide 'Nah, it makes more sense to do it the other way' or is there some technical reason I don't understand?
EDIT: I was thinking of it wrong, more like a 'sub class' in OOP. Even if something is declared in the base class, you access it through the instance you have. But that relationship is not the same with shared or static.
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Aug 23, 2011
Will the list in this shared method keep its state throughout the life of the method? Or will a new list be created every time this method is called?
[Code]...
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Jul 19, 2011
Here are my interface and it's implementation class file. While implenting service function there is a chance to get 3 exceptions.
I need to handle these using a custom fault contract. how to implement 3 exceptions under one fault contract.
Interface:
Function GetEntities() As String
Class file that use the service Interface:
Public Function GetEntities() As String
[Code].....
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Nov 2, 2010
I have a situation where my program saves a file on a regular basis under certain circumstances. Every once in a while, power will fail and the file being written will be gone, I assume because it was in the process of being written when the power failed.So I need a solution that will prevent that situation while still using just one primary file to save the data.
My proposed solution is to write the file to a temporary file, and then copy the temp to the original and then delete the temp. Therefore in the event of a power outage, either the the original or the temp file will always be there. Are there any obvious problems with that method?
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Dec 22, 2009
E.g. how do I get VB.Net to statically type a local variable to be the static type of the expression on the right had side of the assignment?
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Sep 5, 2011
I am doing work for a client who has lost the source code for one of their VB.Net WinForms applications. The assembly they have is not obfuscated at all. I am trying to recover as much of the source as I can as C# source and have tried several tools for decompiling assemblies, including Reflector, ILSpy and JustDecompile (all the latest versions), but they all produce code with a huge number of errors in them. Because of the large number of errors in the generated code, I am going to ask about the specific errors (in different questions), get more directed answers and in this way try shed some light on why all the tools are having difficulty decompiling this assembly. This question pertains to the fact that the code generated by all these tools always have a large number of invalid member variables (fields) such as the following:
private short $STATIC$Report_Print$20211C1280B1$nHeight;
private ArrayList $STATIC$Report_Print$20211C1280B1$oColumnLefts;
private StaticLocalInitFlag $STATIC$Report_Print$20211C1280B1$oColumnLefts$Init;
why the generated code has these invalid member variables?
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Mar 23, 2012
I'm currently working on a VB. Net web service calling another web service running in the mainframe. I was provided with the WSDL file and I generated a proxy class using wsdl.exe. Upon attempting to invoke the method of the mainframe web service using the proxy class, I encountered an exception saying "Conversion from SOAP failed" coming from a line of code in the generated proxy class.
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Dec 24, 2010
I want to maintain a FLAG in Which there is two values of FLAG
1) yes and 2) no
i want that when a form is load a Flag value is yes and The form is close the flag value is no in my back end Database
It is same like sing in person on any web site.
But my Problem is that how can i maintain it any how the my computer is turn off .
i store a database on single computer that is server.but i also want a code for on same computer
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Mar 25, 2010
I am getting the error:"Range variable 'sender' hides a variable in an enclosing block or a range variable previously defined in the query expression."for this
Imports System.Data.SqlClient
Imports System.Linq
Public Class Form1
[code]....
I can select any other item from the table without the error. "sender" has the same properties as "receiver" in the SQL table.
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Nov 6, 2009
i create StudentForm as my mdi child form, what i suppose to do to let user unable to move my mdi child form to other location? how to make it in static location? Private Sub StudentToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles StudentToolStripMenuItem.Click
StudentForm.Show()
StudentForm.MdiParent = Me
End Sub
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Jun 12, 2011
can I customize my datareport? How?I'd like to add static information such the name of the company, address, contact and so on...
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Jan 17, 2010
I was wondering if anyone knows of any way of statically linking all dependant DLL's to the vb.net program? I know there are ways to find the dependencies using dependency walker and other tools like that. But was curious since c++ supports the static ability to load DLL's. If not, what tools can i use to quickly package the required DLL's without having to install .net on all my systems?
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Feb 7, 2011
I am trying to use the value of one variable to call another variable of the same name.I have 2 variable one called VAR1 and VAR2.
The variable VAR1 has a value of "VAR2"
The variable VAR2 has a value of "HELP"
I want to be able to get the value VAR2 from the variable VAR1 I have defined the value of VAR2 early in the code and now I want to call that value by using the value of VAR1.The reason I am doing it this way as I have a list of 50 variables that are pulled from one system. Each of these variables have the same name as the columns of a spreadsheet. The total number of Variable stay the same but the total column headers may vary each time. I need to loop through each of the column headers match them with the variable names and add the data to the spreadsheet.
VAR1 = "VAR2"
VAR2 = "HELP"
i =1
[code]....
This is the tricky bit...if the value of the cell(1,i) = "VAR2" How do I get it to display the value of the variable of the same name In this case how will I get it to display "HELP" when I only have from the VAR1 value "VAR2" I know my code will bring back the value as a string but I want it to bring back that string as a variable and display the value of that variable?
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Apr 23, 2009
how can i make it like IF (todays date is passed a specific date) then basically what i need is to see if the date is passed a static date i set in the vb code.
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Feb 1, 2011
I need to use a variable in a variable, but i dont know how to do. example: dim i as 19("button" & i).top = ("button" & i).top + 1
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Jun 18, 2009
Is it possible to use a variable in a variable name? More specifically, I want to dynamically create labels on tab pages that are also created dynamically. I won't know how many labels to create when I'm writing the code, however. What I was thinking of doing was declaring variables that increased every time for each label like this:
[Code]...
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Feb 9, 2010
I am rewriting a C# class in VB. The C# class has a static constructor in it:
static Class()
{
...
}
which, through the Call Stack, I found is called by the main window's InitializeComponent() method.Everywhere I've looked has told me that the corresponding static constructor in VB is just:Shared Sub New()
but this method is never invoked. Am I creating my VB static constructor right? Is it likely something else that has nothing to do with my static constructor?
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Aug 23, 2011
I receive the error -
[Code]...
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Nov 7, 2011
This will probably be a basic questions for the LINQ & architecture experts however I am failing to understand a problem i've encounted when trying to update a 'Static ObservableCollection.
Me.Grid1.ItemsSource = ContactList Me.Grid2.ItemsSource = From s In ContactList Where s.ContactTypes.Any(Function(t) t.ContactTypeName = "Christmas List")
If I add a new Contact with the ContactType "Christmas List" to the ContactList ObservableCollection, Grid1 reflects the additional Contact however Grid2 does not reflect the change unless I rebind.
Anyway to Reflect the change in Grid2 to show the new Contact with the queried ContactType
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Dec 11, 2009
We have a DateTime Service that pulls the Database date down when we need to use a Date. Now, If I want to run a test using "Todays" Date using FitNesse, What would be the easiest way of creating a way to have (OurService).CurrentDate be static? We have a control that ads Days,Years, or Months to the current date.. and I would like to be able to test this.
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Jul 15, 2011
I am currently using Visual Basics 2010 (Ultimate), and I am trying to modify a free-project listed here:I want the above project to use these hard-coded values below:Key= "087CF262E0E856B8F911B369EE027CF9330F6288343651B1198379A9813BC8C4"
IV = "11D2A07242B79C752E6B53CDD14792C9"So basically i want to encrypt AND decrypt with the above keys.
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Apr 23, 2011
when they say static classes should not have state/side effects does that mean:
static void F(Human h)
{
h.Name = "asd";
[code].....
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