Static Variables On A Web Garden?
Aug 17, 2010Do vb.net static variables work on an IIS web garden?
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Use Variables Or Properties, And Global Or Static Variables In A Class?
Jun 9, 2012I'm new in .NET programming.I have a class Form1 that includes Button1_Click event.Button1_Click creates a multiple Text Boxies at run time)Here is the class:
Public Class Form1
Dim shiftDown As Integer
Dim counter As Integer
[code].....
Difference Between Static And Shared Variables In .NET?
Jun 22, 2009exact diff b/t Static v/s Shared variables in VB.NET?
View 3 Replies.net - When Are Inline Static Variables Initialized In A Class
Aug 10, 2010Suppose we have a class like:
Public Class Question
Private Shared _field as Integer = CrazyIntegersRepository.GetOne()
' Some other useful things go here
End Class
And the method GetOne throws an exception... How can we manage that? Is a good practice to rewrite that into a static constructor? When is the GetOne method going to be executed if we leave it there in the inline _field declaration?
Sub Main In A Project-static And Global Variables
May 17, 2009I try to create a sub main in a project but i can not.I have create a module called Module 1 and inside i have created a Main Sub which is intended to creta a thesaurus_form class instance , like this Code: Module module 1Public Sub Main()Dim thesaurus_form2= New Thesaurus_formEnd SubEnd module.Instead of this, once it has cretaed a first instance of the thesaurus_form class, it creates another one what i dont want at all..How can i do do make it execute the code which is inside the thesaurus_form_load sub..I also can not create a global variable or a staitc variable, because i receive this message.static is not valid in a member variable declaration.
View 2 RepliesUse Of Static Local Variables In Lazy Loading Property
Sep 19, 2011I just recently learned about the uses of static local variables in VB.NET and wondered about it's potential use in lazy loading properties.
Consider the following example code.
Public Class Foo
Implements IFoo
End Class
[Code].....
As far as i can see, this has a few advantages over the usual implementation, primary your inability to access the variable outside of the property, as well as not having to use an additional variable.
My question to you is: Which of those is the "right" way to do it? I know that static variables have additional overhead, but is it bad enough to create, in my personal opinion, unclearer code that can be misused easier? How much performance do you lose compared to the "traditional" method? How does it matter for small classes compared to huge factories?
Local Variables In Shared Method Work Like Static Variable In C?
Aug 23, 2011Will 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?
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VB 2008 Why Are Static Variables Set Equal To 0 In The Declaration When 0 Would Be The Default Value Of The Numeric Variable
Apr 21, 2010Why 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.
View 2 RepliesAsp.net - Local Static Variables In Timer.Tick Event (Stopping A Timer)
Jul 9, 2009I have a timer on a page in ASP.NET.
After a certain period of time elapses, I want to disable the timer.
I want to put a static variable in the timers tick event that will track how many seconds have elapsed.
My question is, will this work?
If user X and Y are viewing the page will they both have separate local static variables?
What is the best method of shutting down an ASP.NET timer after a certain elapsed time?
VS 2008 - Take A String Of Variables With A Common Delimiter And Break It All Back Out Into Separate Variables
Dec 11, 2011Last year (2010) I came across a FANTASTIC command that allowed me to take a string of variables with a common delimiter and break it all back out into separate variables (possibly an array) with one statement.
[Code]...
As long as the delimiter was a unique specifiable character, this one-statement command could break it out into elements. my memory and point me in the right direction.
Passing Multiple Byref Variables / Variables Fail To Change Calling Funct W/ Invoke
Sep 27, 2010I have code, shown below, that works all except for 1 thing: The variables being passed byRef get passed, but once modified in the else section of the "if me.invokerequired" code of RecordData, the variables are never updated in the calling function. To reiterate, the calling function does not receive the updated data that is in the variables custid and amt.When debugging, I see the data change in the else section of "if me.invokerequired", but once it returns from the callback the data is missing.[code]
View 15 RepliesDefine Some Global Variables Of A Class - Variables Occupy Memory?
Mar 23, 2012I define some global variables of a class as follows:
Private Class MyClass
Private var1 as Decimal
Private list1 as List(Of string)[code].....
But I found that after this form is closed, all above variables, var1, list1, list2 still exist in memory. I thought they should be collected by gc since the form is already disposed as I confirmed.
Add: I have monitored half an hour after the form is closed. But these variables are not collected by gc. I have an automatic update procedure on the form which uses above variables.Since the above variables still hold values, the automatic update procedure is always called which causes exception. (One quick fix is to check if form.isDisposed in update procedure. But I do not think this is elegeant. Besides, these variables occupy memory.)
Memory Used In Declaring Variables Are Reclaimed By The OS When These Variables Go Out Of Scope?
Jan 7, 2010Does the memory used in declaring variables are reclaimed by the OS when these variables go out of scope?Does the memory used be released by setting thier value to nothing? if not, then how can I force the garbage collector to run or excecute at a certain/desired time..How about in Windows Forms..How can we make sure that the memory used in initializing and showing forms be released if those forms were closed?
View 13 RepliesMultithreading: Reading/setting Variables, And Passing Variables?
Mar 8, 2011Question 1: What is the difference between "Background Worker" and "Worker Pool" as indicated within the MSDN samples provided.
Question 2: I noticed while using, AddressOf _Function_, variables cannot be passed; what would be an efficient solution to this?
Question 3: While using multithreading is it required to invoke before setting variables, or only form properties?
Question 4: While using System.Net.Sockets is it safe/efficient to use Application.DoEvents while waiting for new data; or would be using a Do While loop be fine without DoEvents since the action would be multithreaded? Note: there can be up to 2000-3000 sockets in use at a time.
Static Constructor In .Net?
Feb 9, 2010I 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?
Static Variable In Asp.net?
Dec 15, 2011I 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?
.net - LINQ And Static ObservableCollection?
Nov 7, 2011This 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
.net - Static DateTime For Testing?
Dec 11, 2009We 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.
View 1 RepliesAdding A Static Crypt Key?
Jul 15, 2011I 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.
C# - Shared / Static Variable Should Be Nothing?
Jan 6, 2011I 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?
C# Vb: When They Say Static Classes Should Not Have State?
Apr 23, 2011when they say static classes should not have state/side effects does that mean:
static void F(Human h)
{
h.Name = "asd";
[code].....
Limit Static Integer?
Apr 28, 2011how to limit static integre.
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Static a As Integer[code]......
Should Always Lock Static Methods?
Nov 3, 2011In the following example GetList returns an instance of a static (shared) variable. That one needs locking in order to be thread-safe.But what about DoSomething which doesn't use any static variables outside the method? Does it need locking too?I'd like to clarify that in this particular case I expect DoSomething to always print 0-100 in sequence (i.e. no 0123745...) regardless of number of calling threads. Or, in general, that different threads don't affect each other's variables (printing to console is only an example). The language in the following example is VB.NET.[code]
View 3 RepliesStatic Gmaps In Winform?
Oct 2, 2011Im trying to load a google static map in a winform. I found a control online that would helpme but i cant get it working. i got the control from Here. i was not able to drag on the control on to the form like others. i have also email the dev of the control but have not heard back yet.
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VB Static Date Updates?
Oct 11, 2010I have an excel sheet developed by a vendor that I'm stuck with the current functionality as a short term solution. The users workflow have them pull 4 separate sets of data which they are copying and pasting into a different spreadsheet where they append the data to previous days' pricing for trend analysis. That macro is built looking for the first blank row in column A, simple enough.
However, they then add the current day's date to this other spreadsheet as an additional column to do that trending. I found a nice link to a site that mentioned I could do this logic by adding code by right clicking the sheet name and selecting 'View Code'. I then entered the following logic that states if column A is populated, populate Column T with today's date statically (Today and Now don't work because I need it to stay at that date when it is refreshed). My issue is that this works great if I enter test data into cell A and hit enter. However it is not populating the date if a copy and paste is executed into the column A. Is there something I'm missing or a recommendation to have this work with copy/paste?
Private Sub Worksheet_Change(ByVal Target As Range)
If Target.Cells.Count > 1 Then Exit Sub
If Not Intersect(Target, Range("A2:A15000")) Is Nothing Then
[code].....
What Is Equivalent Of A Static Class
Nov 30, 2007what is the Equivalent of a Static class in VB.Net. Is it Modules?And When i used one of the C# to VB.Net conversion tools then the code "Public Static class Class1 " was converted to "Public NotInheritable Class Class1"
View 1 RepliesWhy Is Static Method Not Visible
Sep 14, 2011I have a C# method in my datatier that I am trying to convert to VB.Net. I converted it to VB.Net but when I bring up the datatier class the method is not showing. It has been a long time since i have used VB.Net and forgot alot of things [code]I believe it has to do with the declaration, which i have as:Public Static Function UserActInfo(ByVal _eno As String) As useraccount..
View 1 Replies.net - Static Property And Lock Usage
Mar 27, 2009Is this code correct or is there any possibility of some random threading deadlocks etc?
Is it a good idea to use static properties and locking together? Or is static property thread-safe anyway?
Private Shared _CompiledRegExes As List(Of Regex)
Private Shared Regexes() As String = {"test1.Regex", "test2.Regex"}
Private Shared RegExSetupLock As New Object
[Code]....
If it's not obvious code is compiling regexes and storing in a List(Of Regex) so they can run faster. And it's shared so every instance of class can get benefit out of it.
C# - Assign Value To Readonly Static Field?
Nov 17, 2011I have a field which is static and readonly. The requirement is that the value should be allocated to the field at the login time and after that it should be readonly. How can i achieve this ?
public static class Constant
{
public static readonly string name;
}
C# - Performance Of Static Properties/functions?
Apr 5, 2011is there a difference in performance when making properties static/shared that were instance properties before, maybe any locking mechanisms?There is a heavily used object in HttpCache which was accessible through a property in a page-instance(Service.aspx). Now i wonder if it would be better to make it static because the HttpCache is shared across the application anyway.
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