Class-level Static Variable Per Instance?

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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C# - Access A Shared/static Member Through An Instance Variable?

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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Declare A RANDOM Class Instance At CLASS Level?

May 6, 2010

If you run this code you will see that the 500 PictureBoxes that are added ( this is easier to show than adding pixels as a pixel is only a single point ) fall mainly on the diagonal.With regard the RANDOM class, why should this be like this when the bounds of the instances are? >>

p.Location = New Point(x.Next(0, Me.Width + 1
), y.Next(0, Me.Height + 1 ))
as in this code.>>

[code].....-2138214fdeb4

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Can't Define A Specific Instance Of Static Method Created As A Java Class

Mar 12, 2011

Under Visual Basic 2010, I am trying to define a specific instance of a static method that was created as a Java class. I have a vendor supplied dll added in as a reference.[code]...

But, I can't seem to define a specific instance of this method. Using "IntegrationMethod.getIntegrationMode()"always returns a value of zero.

There doesn't appear to be any way to "setIntegrationMode" to a specific value.

The documentatoin for this Class as provided by the vendor are shown below.

When I asked the vendor for assistance, their response was: "

Our javadocs for the IntegrationMethod class show that we provide three predefined instances of the IntegrationMethod class[code]...

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Can't Set DataTable Class Level Variable = Class Table Property?

Sep 29, 2011

I have procedure (Import) that calls a for a new instance of frmImportData. I also have a class name clsBatch that has a data table property called prpParametersTable.For some reason, I get an error (indicated below with ERROR>>>) when trying to assign prpParameterTable to cv_dtImport2. The error states "Object reference not set to an instance of an object.". Why does this error not happen when I assign dtBP to cv_dtImport1? Both cv_dtImport1 and cv_dtImport2 are equal to Nothing and in my Import procedure dtBP = prpParametersTable.

Public Sub Import(ByVal clsB As clsBatch)
Try
Me.cv_clsB = clsB

[code]....

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What's The Difference Between Dim On The Member Level And Static On The Procedure Level

Jan 6, 2010

In Visual Basic 2008, there's two different ways that I know of to accomplish the same thing:The Dim on the member level:

Dim counter1 as integer = 0
Dim counter2 as integer = 180
Public Sub SampleSub1()

[code].....

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Use A Static Variable That Is Referenced To In The Class's Children?

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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Unable To Use An Instance Of The Nested Class Through A Public Variable Of The Parent Class?

Jun 7, 2012

I want to created a nested class that can only be visible to and instantiated from the parent class.But I also want to be able to use an instance of the nested class through a public variable of the parent class.I tried making the nested class private, or making the nested class' constructor private, but it won't compile.Is it possible to do this in .NET?

[Code]...

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Subtract A Listbox Item From A Class Level Variable?

Mar 5, 2012

Im creating a registration application where i have a listbox that displays a Course Name column and a Credit Hours column. I also have a textbox that keeps a running total of the credit hours of each course added to the list. When i remove a specific item from the list, i also want to subtract the number of the selected item from the running total in the text box. Essentially i just want to subtract a certain part of a list item from a variable i have.

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Accessing Instance Of A Class Through A Variable?

Nov 12, 2010

i have

VariableA as Class1
Variable1 as string
Variable1 = "VariableA"

I want to be able to use Variable1 to get access to VariableA(?).

So i want to able to do something like

VariableA.Property1 = "test"
But like this:
Variable1.Property1 = "test"

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Check If Variable Holds An Instance Of Class?

Apr 10, 2011

Dim myObject As Something There I defined my variable myObject of type Something. But, as you can see, I am giving it no value yet. Sometime on runtime I want to check if myObject is holding a value or not. I tried this: If myObject <> Nothing Then But apparently I can't do such comparison.

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.net - Create A Variable Of An Instance Object Of A Class At Runtime?

Sep 29, 2011

I am trying to create new variables inside a class after creating its object at runtime. The problem is that I don't know the variable names or the value beforehand so I have to create the new variables at runtime.

[Code]...

This is a more elaborate explanation of my code. If you observe that in the Eval function I have tried to evaluate Fval(abc). Now the object array abc is not declared in the Test class because it existence is not known beforehand. What I want to do is create an object array abc of length 2 and populate it with some values and when Fval(abc) is called then then the value of index 1 should be the return value of Eval fucntion.

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.NET : Runtime Is Initializing A Variable To An Instance Of The Wrong Class?

Jul 26, 2010

I've got some code that looks like this:

If ediFileGroupAbbr = "NIPDSINV" OrElse ediFileGroupAbbr = "WWPDSINV" Then
Dim p As New PrivateBillingAdapter_ForN(ediFileGroupAbbr, businessLocationID, mode, EDIJobItemLogID, BusinessUnitID)
Return p.ProcessEDI(True, False)
ElseIf ediFileGroupAbbr = "FOPDSINV" Then

[code]...

to which I'm passing in a value of ediFileGroupAbbr = "FOPDSINV". But the code is executing as if it's dropping into the third condition (p is a PrivateBillingAdapter). So I've stepped into the code and, sure enough, it drops into the second condition. BUT, if I step into the execution of the constructor, the debugger jumps to an odd place in the code - sort of the middle of a method and not on any actual line of code.A couple clicks and it hops back out of the constructor, still in the second block of code. But if I mouse over the variable p to see it's type, boom, its a PrivateBillingAdapter (from the third block).Like I said, something is clearly wrong but I don't know what. I've tried rebuilding several times but with no new results.This is VS2003, framework 1.1 with VB.NET.

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C# - .NET Generic Class Instance - Passing A Variable Data Type

Jun 2, 2010

I'm tyring to pass a variable data type to a template class. Something like this:

frmExample = New LookupForm(Of Models.MyClass) 'Works fine

Dim SelectedType As Type = InstanceOfMyClass.GetType() 'Works fine
frmExample = New LookupForm(Of SelectedType) 'Ba-bow!
frmExample = New LookupForm(Of InstanceOfMyClass.GetType()) 'Ba-bow!

[Code].....

I'm assuming it's something to do with the template being processed at compile time but even if I'm off the mark there, it wouldn't solve my problem anyway. I can't find any relevant information on using Reflection to instance template classes either.

(How) can I create an instance of a dynamically typed repository at runtime?

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.net - Prohibit An Instance From Calling Shared/Static Method?

Aug 27, 2010

Is it possible to prohibit an instance of a class from calling a shared/static method?

For example:

I want to allow this:

ClassName.MethodOne()

But I want to disallow this:

Dim A As New ClassName
A.MethodOne()

The reason this is desirable is that in this case it is semantically confusing if an instance can call the method.

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VS 2010 Using Reflection Difference Between Static And Instance Fields And Properties

Jun 6, 2012

I'm trying to obtain the values using the prospective GetValue(s) methods but I don't understand the syntax of the documentation. I'm sending the correct bindings (I believe) to filter the fields, and properties that i'm interested in usually

[Code]...

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IDE :: Association To Static Class In Class Diagram

Jan 24, 2010

I'm wondering why I can't create an association from a class to a static class in the class diagram editor of VS. Any reason for this?

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Static Variable In Asp.net?

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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C# - Shared / Static Variable Should Be Nothing?

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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Declare A Static Variable As Global?

Oct 25, 2006

How can i declare a static variable as global in vb.net?(Global static variable)

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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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Generate Serial Numbers From 1 To 100 Using Static Variable?

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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What Is Equivalent Of A Static Class

Nov 30, 2007

what 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"

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Local Variables In Shared Method Work Like Static Variable In C?

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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C# - Reset A Static/shared Class?

May 4, 2009

I've got a shared class (static in C#) which mostly carries some settings data that any class in the application can read and sometimes write. Also there are some static properties which holds some internal states.

Now I want to revert this class to initial stage of it. With all default variables etc. Assume that the user want to reset the current state and start over without restarting the application.

In a singleton model I'd simply renew it with something like this :

Public Sub Reset()
_Instance = New MyClass()
End Sub

However this is not possible in a Shared class. Or should I switch back to Singleton?

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Call A C# Class's Static Method ?

Oct 28, 2010

I have a C# dll and want to use it in VB.NET. I'm using C# 2008 Express and VB 2008 Express. I have added a reference in a VB project to the C# dll. When I create an instane of a class in the C# dll, it gives the following error messsage: "Type 'RF.RabinFingerprint' has no constructors". My C# dll code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;[code].......

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Converting A Static C# Class To VB Module?

Dec 3, 2009

I am trying to convert following code into a VB equivalent so that I can use it with threading my forms and controls.

using
System;
using
System.Collections.Generic;

[code]....

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Equivalent Of A C# Internal Static Class?

Jun 9, 2010

If I have a module in a VB.Net class library, will it's visibility be limited to the assembly? What I'm looking for is the VB.Net equivalent of a C# internal static class.

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Set A Module To Behave Like A Static Class?

Feb 9, 2010

This questions is for VBers, it's irrelevant in C#.

In VB, when you create a module, all it's fucntions and members are available in the scope without need to type the module name, just like all the VB functions (Rnd, Mid, IIf etc.).

I want to create a module but I should have to explicitly write it's name to access it's members, i.e. it shouldn't be loaded to the scope like a namespace.

Update

For example, I have a Module of extension methods, I don't want all it's members to show up on the scope and in the intellisense.

I want it to be available only by instance.ExtensionMethod().

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Declare A Variable For Instance Variable With Dim Not Private?

Feb 6, 2011

why don't we declare a variable for instance variable with dim not private?

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