I need regarding declarations of global variable.. I created a module here is the script.
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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!
how to declare out global variable? i tried out but get error.. below is my orginal code
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How can i declare a static variable as global in vb.net?(Global static variable)
View 5 RepliesJust 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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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.
View 1 Repliesi could use Global x as string in vb6 in a module to declare it with global privelages, how can i do this in vb2008? how to declare a global variable in vb2008? so that i could use it anywhere i want. i know global variables are not recommended in programming but i need one.
View 4 RepliesIf we declare a global variable in module in vb.net, we can use that variable in anywhere in project.
How can we achieve same thing in C#.
Previously when we tried to convert a vb.net 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?
I have an application that I'm writing and I'm trying to declare two variables from my sql server, store the values and pass them to my forms.[code]...
View 5 RepliesGet the value of Global variable in javascript [code]...
so want to access "a" in code behind as it's global varible
say i have an auto property Public Property P As Integer and everytime I want to read this variable P in a function, i will declare a local variable as such: dim _p = P then read _p instead of P. I'm wondering does it make sense at all? will it actually make things slower (which of course isn't my intention).Btw if we change the question to Public Property P As Object is there any change in the answer?
View 7 RepliesI've got a console app with a sub main then i have a seperate class inside the module..i can't seem to update the public global variable from inside the class as i can't declare the variable as shared...
View 6 RepliesCan i write 2 classes for one Script Task editor in SSIS(2008). I tried to access the global variable like below. I created 2 classes and it doesn't show any compile error, but i couldn't access the global variable in class2 which was assigned as 2 in class, ScriptMain.
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How I can declare global variables in vb.net that I can access them in all windows of my application?
View 5 RepliesWhat happens if I do: Dim x As New Int32? Is a object of int placed on the heap? If it is, maybe your application would be able to access global variables faster if they were reference types.
A global variable as an value type should be somewhere at the bottom of the stack most of the time and it might take more time to get to this then to get a object from the heap. Unless it's the same story with the pointer of this object is also at the bottom of the stack of course.
How do I declare a global variable in VB - these variable need to be accessible from all the vb forms. I know how to declare public variable for a specific form. but how do I do this for all the forms in my project.
View 4 RepliesI'm trying to declare a array that I want to use in the module and in the forms. I like it to be usable all over but I cant get it to work.[code]...
View 3 RepliesI would like to declare a list above Sub procedure and to be able to add/modify it. I would like to have something like this:
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When i run the above example i get an error like: Object reference not set to an instance of an object.
At the head of a module, I wish to declare some global variables for use in various subs/functions.
What is the difference between.Dim x as string and Private x as string / Public x as string, and when would I use one over the other?
What's the C# equivalent of
<% dim name %>
so you can use it for web forms in PayPal API integration?
why don't we declare a variable for instance variable with dim not private?
View 3 RepliesWhat is Different between global variable and public variable?
View 1 RepliesI 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.
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Here is the entire source code:
Module Module1
Public strDataValue = frmTest.txtDataValue.Text
End Module
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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.
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.
View 5 RepliesHow Can I create a Global Varibale for my vb.net 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.
View 1 RepliesI'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
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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?
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.
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.
View 4 RepliesI 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?
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".
View 2 RepliesHow 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.
View 9 Replies