Defiine A Global Variable For The Whole Application?

Aug 26, 2009

How do I defiine a global variable for the whole application so that it does not have to be defined in all the forms that need it.


Application Like A Shopping Cart - Global Variable?

Dec 27, 2011

My project is to create a shopping cart application.  I have my main form and from there the user can go to two different forms to add books to their cart, the cart being the main form.  This all works.  What I can't figure out, is how to use global variables for the prices, shipping, tax and updating the total.  I have places for this information to show up on the main form, and I've created a module for the calculations and prices, but I don't know how to code it to get the prices to show up in the specified areas.

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What Is Different Between Global Variable And Public Variable

Jul 15, 2010

What is Different between global variable and public variable?

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.net - Value Of Global Variable Won't Change

Dec 22, 2011

I have a variable whose scope needs to be global, because it needs to be called in a function as well as in a button press. So I declared the variable in a Module so it would be global.The problem is that the value of this variable needs to be equal to the value of the text property of a textbox in the form.You enter a string into the textbox, in this case I entered "Hello". Then you click the button and it displays what you wrote.You click OK in that message box and change the value in the textbox. In this case I changed it to "Goodbye". Then I hit the button again, but the variable did not change values and the messagebox displays "Hello" again.


Here is the entire source code:

Module Module1
Public strDataValue = frmTest.txtDataValue.Text
End Module


Note: This is just a demonstration of a problem I'm having in a much larger program so the variable does have to be global.

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Access A Global Variable In C#?

Sep 21, 2011

If we declare a global variable in module in, we can use that variable in anywhere in project.

How can we achieve same thing in C#.

Previously when we tried to convert a project to C#, we succeeded in removing the syntax error but we can't access global variable in a form.

I need some solution or guidance. Where I am making a mistake?

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Can #Const Be A Global Variable?

Feb 6, 2010

VB2008: I would like to set a #Const value in a module and use it throughout my project.  Is this possible?  It appears that the #Const scope is limited to the function it's in.

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Create A Global Variable?

Oct 11, 2010

How Can I create a Global Varibale for my project. When I LongIn I want to keep the user Id in a varible and I will Use it in deferent Forms. And The User name will be saver in the varible untill I close the Software. 

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Declare Out Global Variable?

Nov 11, 2010

how to declare out global variable? i tried out but get error.. below is my orginal code


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Global Variable Across All Machines?

May 31, 2009

I'm focusing on Networking programming and I had found something that was very interesting to me in Remoting, which is the ability to have some how a "shared global variable accross applications" ... Here's a quick example of what I'm saying (which is stripped and modified from one found example on internet):

In the Remoting class:

Code:Namespace remoteclass    Public Class xx        Inherits MarshalByRefObject
Public Shared_Var As String 'This is our share variable
End ClassEnd Namespace


I found that I can eaisly use this red-marked variable (Shared_Var) acrross all application clients without any extra line of code to update its value ... without using even what is called "singlecall" and "sigletron".

But I have concerns:

1) This is only applicable for simple types of variables (e.g. string and integer) but an array or DataTable for example are not updated! and I don't know why!!

2) Would that load the communication network (I mean the content of these shared variables (few KBs to 1MB) will always be communicated across machines all the time without any management) ... Actually I don't how this works from inside, Does it update on change or cyclic ...

3) And finally, can I found something like this in WCF?

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Global Variable In Website?

Dec 22, 2010

I'm wanting to declare a variable as below for use in several pages on my site. I assume rather than declaring it once per page I can do it globally? I've tried it in a class (app_code folder) and in the global.asax page but my code can't seem to find it. I may be going abo9ut it all wrong though? Code as below...

Dim myUser As MembershipUser = Membership.GetUser()

So basically as it stands my pages can't find the 'myUser' variable.

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Global Vs Local Variable

Mar 22, 2010

I'm writing a subneting calculator in VB.NET.I'm using the IDE SharpDevelop.Well my problem is I'm using a function to do some calculations and then to figure out the class of the IP addresses.Well I pass a variable from the subroutine, that is accessed when a button is clicked, to the function then the variable is passed back to the subroutine and then the variable is passed again to another function but when it reaches this second function it doesn't retain the value it was given in the first function.I'm not sure if I'm just passing the variable wrong or if this is how it works.I know I can make this work probably by using global variables but I'm not sure if this is proper. So my ultimate question is what is the difference between local and global variables besides just scope and should I try and use one more than the other.

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How To Define Variable As Global

May 14, 2009

I have no idea as to how I can define a variable as "GLOBAL" in VB Express 2008. I used VB V 3.0 and if I remember correctly the statement "Global varName as Integer" allowed me to use the variable across different forms. I've tried the statement "Public varName as Integer = 0" on Form1 but Form2 tells me the variable is not declared.

The statement (in Form1) "Form2.Label1.Text = CStr(varName)" displays the value on Form2 in Label1 but I cannot then use the value again in Form2, e.g. "Label2.Text = Label1.Text". How I can transfer a variable value from one form to another and manipulate that variable in the second form?

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Loading Value Into Global Variable

Jan 13, 2010

I have a problem to load a value into a global variable, I am using VB Net (2005) in Windows Forms, this is a multi-Forms program. Here is my problem, as I start my program, it check if my form "Setup Option" has been loaded ounce, if it did it, it does skip it. When "Setup Option" is loaded the first time I have written 2 values into 2 textboxes using My. Settings and on form Closing it does work, if I re-open "Setup Option" form I can see the 2 values in the textboxes E.g.: txtGst.text=5, txtPst.text=6.5, so good so far. Now what I would like is to be able to use the contains of them 2 textboxes and place them into global variables, I already have a Module "modGlobals.vb".

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Pass A Global Variable From A Dll To A Exe?

Sep 20, 2010

How can i pass a global variable from dll project to a exe file, after this i want to run the exe also from the dll.

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To Make Variable Global?

Jul 28, 2009

Private Sub NoteTabToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles NoteTabToolStripMenuItem.Click
Dim NewTab As New TabPage


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Use Of Global Variable In SelectCommand`?

Apr 1, 2011

I have set a global variable in a module, which I then set the value in form1.I then wish to use this in form 2 in a Select Command for a dataadapter, it however says the variable is not declared although if I call it in a MsgBox on loading form2 it tells me the variable.

My code for the select is:
Me.OleDbSelectCommand1.CommandText = "SELECT Amount, [Record Number] FROM [" & _
"Test] WHERE ([Record Number] = ?)"


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Assigning Variable To A Label In Global?

May 11, 2011

I'm working on my final for VB.NET, and maybe it's just late...but here's how it goes. I need to make a variable named intMoney and it will be used to keep track of how much money you have and the value will be displayed in a label. Since this 'game' will have a lot of things going on, it needs to be available in a lot of places, not just one click event.

But I need to set intMoney to a starting value of 200 and then assign intMoney to a label called lblMoney. I can't assign intMoney to lblMoney in global. I get build errors. Where should I put the lblMoney.Text = intMoney?

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Create A Combobox As A Global Variable?

Jul 28, 2011

Where and how do i create a global variable for a combobox? I need to use it on different forms.

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Declare A Global Variable And Access?

Jun 21, 2010

I need regarding declarations of global variable.. I created a module here is the script.


and then I set the value of that variable in my Login form and then my PROBLEM is when accessing it on the my Main form and I want to display the data of that variable in a textbox, the variable does'nt hold the value that I already set. I'm waiting for replies!

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Declare A Static Variable As Global?

Oct 25, 2006

How can i  declare a static variable as global in static variable)

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Display Image With Global Variable?

Oct 29, 2009

My program involves selecting up to 2 images and having them displayed on another page. I'm currently using global variables to pass the image name (for example apple) to the 'results' page with the following [code]...

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Disposing A Global Font Variable?

Aug 13, 2010

I have declared Fonts at class level to use it through my methods in that form. Form 'frmA' is shown with ShowDialog and when it closes or stops using fonts I'd like to properly dispose fonts.When I run code analysis FxCop it complaints with:CA2213 : Microsoft.Usage : 'frmA' contains field 'frmA.Font1' that is of IDisposable type: 'Font'. Change the Dispose method on 'frmA' to call Dispose or Close on this field...How to properly dispose globally declared fonts so that is "by the rules" and FxCop does not complain any more?How to 'Change the Dispose method on 'frmA' to call Dispose'?

Option Strict On
Public Class frmA


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Error Creating Global Variable?

Sep 19, 2009

I have got a bit of code which creates an error when you start debugging. the code is:

Dim Gravitee As Decimal = TrackBar1.Value / 100

This code is a declaration (outside of a sub) so that it can be used in any subs I choose. I don't know why this causes an error?

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Global Variable Can Be Created During Runtime?

Jul 16, 2009

global variable can be created during runtime?

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Global Variable Doesn't Work Right?

Aug 18, 2011

I have a problem with a global variable in VB.Net.In one sub (triggered by a button) I create objects and store them into a global variable (an array). After that I create a table (DataGrid).With a second button another sub is triggered and tries to use the array from the global variable, but it seems to be empty.Here is the code:

<script runat="server">
Dim array_datensatz(12) As Datensatz
Sub submit1_click(ByVal Sender As Object, ByVal E As EventArgs)[code].....

Why arn't the objects in the array?

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How To Create A Global Variable In VB 2008

Jan 17, 2012

Okay, Im a newbie to VB, so how do you create a Global variable inside a sub.

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Setting A Global Variable Making?

Aug 3, 2010

How do I optimize my code making it DRY approach. I want to make my variable to be on public/general so i can re-use it

Public Class BasicForm
Dim Product1, Product2, Product3, As Integer
Dim firstName, lastName As String


I want to move the variables (product1,product2) to somewhere else that I can set it one time and easily access it with other control. What I did before is I alway set the variables to every control.

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Use Function Return In Global Variable?

Jun 3, 2010

Can't seem to figure out how to use a function return variable in global Dims[code]...

I have also tried adding "FixPath()" under Sub On_load() but got same result. Also the reason I have to have these global is because I have around 30 Subs that refer to "Path" Variable.

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VS 2010 Pass Global Variable In DLL?

Aug 16, 2011

How can I pass the global variable to .dll from windows application (.exe)

Test.dll 1. FunTest1 (Parameter Required)
------- 2. FunTest2 (Parameter Required)

Within 'FunTest2' it call 'FunTest1'.

And in .Exe I call 'FunTest2' and want to pass the parameter for 'FunTest1' also.

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Way To Break On Change Of A Global Variable?

Jun 8, 2009

Running windows forms application, I have a module with public variable declarations which stay in scope during entire debug execution.Is there a way to cause a break to happen based on a change in value of such a variable?

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How To Use Session Variable Of One Page To Initialize Another Page's Global Variable

Mar 29, 2012

I have 2 web pages. In the first webpage I have a text box which takes an user input.The number of controls rendered in the second page is based on the user input in the first page.I am storing the user input from the first page as a session variable [code]Now, I wish to use this session variable in the next page for initializing a global variable and what I tried to do is Dim num_Invitees As Integer = CType (Session("NoOfControls ToGenerate"),Integer)But this gives me a NullReferenceException.Can someone please suggest me what exactly I should be doing in order to use the session variable to initialize a global variable and also why the session variable's value is null while using outside a function but works fine when used inside a function?

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Access Script Global Variable From Codebehind In

Jul 15, 2010

Get the value of Global variable in javascript [code]...

so want to access "a" in code behind as it's global varible

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Jul 7, 2011

After many many years of using Classic ASP, I am attempting to delve into the world of ASP.Net using VB. I have gotten way to use to being able to declare variables on a page, inlclude that file and use it everywhere. I am struggling to declare a global variable. I just need


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Cannot Pass Global Variable To Control Textbox

Sep 5, 2011

I have to pass a global variable to a control textbox. but after running the code the textbox is empty[code]...

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Create A Global Variable/config File?

Dec 4, 2009

how to create a global variable for this situation: I would like to store who logs in to a system (like, who is currently logged in, when he logged in) and then use that info for a transaction form, which will look like this: which admin made the transaction).

If I were to use a global variable, it would mean having to pass it onto several forms right (eg: from login form to the forms that will use the log information). I'm also thinking of just having a config file that will store the said login info that will be changed everytime a user logs in.

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Creating A Session Specific Global Variable?

May 12, 2012

Is it possible to create a variable that is global for each session in ASP.NET? Usually I do this with Session:

Session("my_variable") = 10
But this necessitates casting it every time I want to use it like so:
Dim my_variable as String = CInt(Session("my_variable"))


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Declare A Global (or Public?) Variable On Load?

Jun 13, 2012

Just working on getting more fluent in Visual Basic over the summer so I'm still sharp for my next visual basic class. My teacher went over variables, but only in local scope.I have looked everywhere, but I can't find exactly what I need. I'm making an alarm clock of sorts, and I have this code to populate the minute array and the hour array.

Public Class Form1
Public Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load


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VS 2010 Displaying Global String Variable?

Jan 13, 2012

To be honest I am fairly new at VB as a language, and I just came across a problem that I can't figure out. I have a feeling it's something simple...but here it goes.I created a set of string variable on my first form as follows:

Dim strpro1 As String = txtpro1.Text
Dim strpro2 As String = txtpro2.Text
Dim strpro3 As String = txtpro3.Text
Dim strpro4 As String = txtpro4.Text
Dim strpro5 As String = txtpro5.Text

I set strpro1 as a global variable in my module:Module Module1 Public strpro1

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Define Property (IsInEditMode) And Global Variable (isEditMode) In ASP.NET?

Mar 9, 2009

public partial class _Default : System.Web.UI.Page
private bool isEditMode = false;
protected void Button1_Click(object sender, EventArgs e)


What is the VB code equivalent for the above C# code. Mainly how to define Property (IsInEditMode) and Global variable (isEditMode) in ASP.NET?

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How To Declare A Global Variable In A Button Click Event

Jun 8, 2011

I'm wondering whether it is possible to declare a global variable in a click event. I need to declare an array of a specific size. The specific size is generated using a series of IF statements. I only need to know how to declare it.

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