Best Way To Initialize Shared Members In A Class

Aug 23, 2011

I was looking on the interweb to see if there were any good examples on how to initialize shared members within a class while still initializing instance variables.[code]How do I initialize both instance and shared members without re-initializing the shared members every time an object is created from a class?

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Constructor - Whats The Best Way To Initialize Shared Members In A Class In VB.Net?

Dec 8, 2010

I was looking on the interweb to see if there were any good examples on how to initialize shared members within a class while still initializing instance variables. I did find an expression that might fit to the answer:

[code]...

How do I initialize both instance and shared members without re-initializing the shared members every time an object is created from a class? Thanks!

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Initializers On Strcture Members Are Only Valid For Shared Members And Constants?

Jan 5, 2010

ok this is annoying, i've got a structure RInteger.

Private VAR_Value As Integer
Private VAR_Max As Integer
Private VAR_Min As Integer

[code]......

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Asp.net - Access A Module Or A Public Class With Public Shared Members From Inline Vb Code <% .. %>?

Feb 10, 2011

I can access a module from code behind but not from the aspx page in inline VB code <% ... %>.

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Why It Is Not Necessary To Initialize All Members In Parameterized Constructor Of A Structure

Jan 19, 2012

When it comes to constructors in a Structure type ,it is fact that we can not explicitly provide the default constructor .It is provided by the runtime. Ok, another point that is applicable to C# language is that if we are defining a parametrized constructor then it is compulsory to initialize all fields . We can not leave any field uninitialized , since the runtime will not call default constructor if we are calling parametrized constructor .Its logically right , but in VB.NET language , actually you are free to leave any of the fields uninitialized in your parametrized constructor.

[Code]...

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Use Derived Class Shared Variables In Shared Methods Of Base Class?

Jun 4, 2010

I am trying to add shared members in derived classes and use that values in base classes...

I have base

class DBLayer
public shared function GetDetail(byval UIN as integer)
dim StrSql = string.format("select * from {0} where uin = {1}", tablename, uin)
end function
end class

[Code]..

currently there is error using the tablename variable of derived class in base class but i want to use it i dun know other techniques if other solutions are better then u can post it or u can say how can i make it work? confused...

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IDE :: Intellesense Shared Members?

Jun 22, 2010

Why does intellesense show shared members? e.g:Dim x as doublex.epsi 'Epsilon will show up as a valid member in intellesenseIs there a way to change this behavior?

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Visibility Of Static / Shared Members

Dec 30, 2009

I have faced with a situation in VB.NET and C# (.NET2) with the visibility of the static/shared members. It seems to me a little strange in VB.NET:

public class A {
private static A instance;
public static A Instance {
get { return instance; }
} public string Name { get { } }}
[Code] .....
Shared member behaves like a class public one I can repeat it to infinite..

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.net - Access Shared Members In Partial Classes

Feb 16, 2011

I'm writing a WCF-Service and I split up my service class to multiple partial class files, so every ServiceContract-Implementation gets its own file. I have one file however that should contain e.g. members that are used by every partial class file such as a logger. The service is hosted with IIS 7 if this matters in any way.

[Code]....

The code compiles fine, but at runtime I get an BC30451: The name m_Log is not declared Error (Don't know the exact words for it. I get a german message ;) ). I don't think it has something to do with the type of m_Log or a depending assembly because I get the same error if i try this with a String. What am I doing wrong? How can I make this work? Edit: I was trying the same thing in a simple console application without any problems. :(

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C# - Best Practice For Complex Shared / Static Members

Sep 7, 2011

I took over an ASP.NET application and have found this throughout several classes in the application. The programmers before defined several shared/static variables that act as "complex enums" throughout the application. As a fairly new programmer, it doesn't look like best practice.

Here is an example:
Public Shared SecureCommentsWrite As New Task("Secure Comments Write")
Public Shared SecureCommentsRead As New Task("Secure Comments Read")
Public Shared EditEmergencyContact As New Task("Edit Emergency Contact")
Public Shared DisplayPersonalReferences As New Task("Display Personal References")
Public Shared EditPersonalReferences As New Task("Edit Personal References")

The constructor takes the description, then loads the ID key from the database using a stored procedure (the database is SQL Server.) This seems like a good idea since we deploy this application to multiple databases and want to ensure that we load the ID key that's in that database in case it changes. However, since there are literally hundreds of these in the application, the first load takes a while.

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Handle Shared Members When Dealing With Interfaces?

Sep 30, 2011

So I did tons and tons of work trying to make an interface for a common set of classes. The idea was to make an interface that each class could use within the set, but ultimately each class is different. Turns out interfaces do not like shared members. What I tried:

Public Interface ISomeInterface
Shared Property Meta() as Object
End Interface
Public Class A
Implements ISomeInterface

[Code]...

Obviously, had I done my homework on this, I would have known that shared members can't be use in interfaces. Should I just leave the individual classes completely responsible for handling its shared members? Is there another way to keep coupling down to a minimum with shared members? Theres about 20 something or so classes that will implement a single interface.

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Override 'Equals' In A Structure With All Shared Members?

Dec 5, 2011

I have a structure written in vb.net with all shared members.  I need to override 'Equals', '==' and '!=' to avoid a warning. 

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VS 2005 Modules Vs Private Classes With Shared Members

Mar 28, 2011

I've read that modules are basically shared classes. For a module though, you can call a method directly without prefixing the module name. So I can do this: methodTest("abc", mod1Enum.enum2)But for a class with shared members I have to fully qualify the method call, and in this case fully qualify the enum:[code]In our conversion from VB6 to .NET the need to fully qualify all calls like this might be an argument for us to bring our VB6 modules over as modules instead of converting them to classes.

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Access Members Of A Sub Class Through A Property Of The Parent Class?

Mar 30, 2010

This is a bit of a continuation from a previous post for which AtmaWeapon was very informative.

Problem:
A parent class has a sub class with various properties. A property of the parent class is a List(of T) with T = the sub class The issue is how to store data in the sub class of the instantiated parent

Some example code (hopefully formatted correctly):

Code:
'=========== Class Definitions =============
Public Class courseClass
Public Class timeTableClass

[Code].....

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Method To "override" Shared Members In Child Classes

Mar 5, 2010

At the moment I'm trying to create a kind of model in vb.net which can be used to create/fetch database entrys.

I created a main class Model with a shared function to fetch the datasets, e.g. Model.find(). Now I'd like to create Classes which inherit the main Model-Class, e.g. a separate one for users: UserModel.find() => "SELECT * FROM users".

What I need now is to find a way to tell the Class which table it should use. I thought about an abstract String "table" which is a constant in each "child-model", but how could this be implemented as it's not possible to override shared members?

Edit: Maybe this will make it a little clearer what I mean:

Public Class Model
Public Shared _controller As Controller
Public Shared table As String

[Code].....

So I want a shared method which finds all database entries and gives back an array of instances of its own type, e.g. Model(). That's why I wanted to keep the find-method shared and not bound to an instance.

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Use A Private Class And It's Members From Another Class?

May 18, 2009

I usually use which is free, works a little too well, it's obfuscating the code that passes between my scripting class and the other classes, so after obfuscating the app, the scripting functions no longer work.However I found another obfuscator called Skater lite which is a free edition, it will only obfuscate private classes and members, so what I would like to do if possible is make most of my classes private and their members (except for the scripting class, which should allow it to work properly after being obfuscated), and somehow still use them globally, declaring an instance of the class doesn't seem to work, I'm not even sure it's possible and I know little about the scope of private classes, so anyone got any ideas or workarounds?

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Access Enum Members From Outside A Class?

Aug 1, 2011

I'm going to do my best to describe what I'm trying to do. I have a class that has an enum in it.[code]...

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Class Members Autogenerate The The Corresponding Properties?

Sep 19, 2011

I have a Data class whichs hold 70 class members to save me a hole lot time and effort not having to type all the properties for hand I'm wondering if there is a   simple tool i VS2010 that I can use to auotgenerat the "property stubbs"

[Code]...

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Struct Or Class For List Members

Apr 16, 2012

I have an application that reads data from a SQL query into a list corresponding to the rows of the query. So, I have something like this:[code]What I'd like to know is if I should be using a class (as above) or a structure, and what the difference may be in terms of memory or runtime, if any.

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Create A "shared" Variable That Is Shared With All Instances Of A Class?

Jan 14, 2011

I seem to be drawing a blank.  I'd like to create a "shared" variable that is shared with all instances of a class but not classes that inherit from it.  For example.Class A: Shared list As New List(Of String): list.Add("A")

Class B Inherits A: list.Add("B")Class C Inherits B: list.Add("C")The end result I'd like is that any instance of A has just A in the list.  Any instance of B has A and B in the list.  Any instance of C has A, B, and C in the list.  I can accomplish it by creating Instance variables, but I have to construct the list for each instance of a class.  I'd like to construct it once for a specific point in the Hierarchy and then share it accross other instances of that class.

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Can't Inherit Shared Properties From A Base Class In A Child Class?

Dec 29, 2010

This is another one of my "I think it's not possible but I need confirmation" questions.I have a base class for a bunch of child classes. Right now, this base class has a few common properties the children use, like Name. The base is an abstract class (MustInherit)Technically, this means that everytime a child class is instantiated, it lugs around, in memory, its own copy of Name. The thing is, Name is going to be a fixed value for all instances of a given child. I.e., Child1.Name will return "child_object1", and Child2.Name will return "child_object2".

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Access A Class Members In Asp.net Vb 2008 - Different From Vs 2003?

Mar 10, 2009

This might seem like a silly question, even for a newbie but I can't access the members of a class from a user control. I am developing a shopping cart application in vb 2008. inside the app_data folder i have a folder name BusinessObjects which contains a class called Catalog. This is the code for this class:

[Code].....

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C# - Handle Events Of Members From Another Class / Instance?

Jul 14, 2010

I am attempting to share a sub menu among several different parts of an application so that it is consistent (not wanting to copy/paste.) I thought it would be simple. I am doing something like this:

[Code]...

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.net - Derived Class Members Not Available When Added To Custom Collectionbase?

Apr 28, 2009

I have a Base Class, called primitive Graphics. derived from this class are several different types of graphics, squares, rectangles, lines, etc. I am storing those graphics in an object that inherits collectionbase. This causes a problem because I cannot access any of the members in the derived class when they are added to the collection. Here is the default property for my primitivecollection class

[Code]...

My current workaround is to just put all of the public members in the base class, however this is starting to look ugly as I add more derived classes that need members available to the derived class only

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VS 2010 Disable Default Class Members And Methods?

Mar 13, 2011

Is there a way to disable the default members and methods inherited from the base class?

I made some classes in which elements like "Equals" and "ReferenceEquals" are confusing or I don't want them to show, or I have other methods providing similar functionality with different names and I don't want to override and use the default name.

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C# - Initialize The Variables - Name Property Of The Dings Class To Be Initialized At First?

Jan 27, 2011

I have classes similar the following:

[Code]...

I want the Name property of the Dings class to be initialised at first, I know, I could also create the foo-object (as member of dings) later in the constructor. But I want to have it this way, because in the end there are very much singleton objects instantiated in the Dings-class that I want to be created in only one line.

[Code]...

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Class - .NET - Automatically Initialize Extended Property Of Type Object?

Feb 15, 2012

I am building a code behind page that has a public property (MyDTOItem) which is essentially a DTO object (dtDTOItem) Note: In my code the Get and Set are actually real code (I stripped it for the example).The problem I am having is in the Page_Load event. When I set the .Member1 property of the DTO object the Get code runs and not the Set and therefore the DTO ibject property .Member1 never gets assigned. I figured out that if I add code (MyDTOItem = New dtDTOItem) to the Page_Load event then it will set the value correctly. What I am trying to figure out is how to initialize the property object without having to do it explicitly. It has to be an extended property because I have custom Get and Set code.

Public Property MyDTOItem As dtDTOItem
Get
End Get
Set(value As dtDTOItem)

[code]....

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Class - Automatically Initialize Extended Property Of Type Object?

Jun 5, 2006

I am building a code behind page that has a public property (MyDTOItem) which is essentially a DTO object (dtDTOItem) Note: In my code the Get and Set are actually real code (I stripped it for the example).

The problem I am having is in the Page_Load event. When I set the .Member1 property of the DTO object the Get code runs and not the Set and therefore the DTO ibject property .Member1 never gets assigned.

I figured out that if I add code (MyDTOItem = New dtDTOItem) to the Page_Load event then it will set the value correctly. What I am trying to figure out is how to initialize the property object without having to do it explicitly. It has to be an extended property because I have custom Get and Set code.

Public Property MyDTOItem As dtDTOItem
Get
End Get

[code]....

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Initialize A New Instance Of A Class, But Pass It To Other Forms Too For A Wizard Based App?

Dec 20, 2011

As an ameture developer, I've never really used classes. However, I've been reading about using classes and automatic properties. I have therefore created a class which looks similar to this:

Public Class Quote
Property QuoteNum as integer
Property AccNum as String
Property Price as Decimal
End Class

The stumbling part for me comes in the way of letting form2 know which class form1 has initialized. There are in this example 3 forms to this wizard. If someone starts another wizard whilst half way through the first wizard we need to keep the variables seperate hence using the class. I think I'm along the right track, but maybe confusing myself a little.

[Code]...

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Partial Entity Class With Shared Extension Not Associated With 'other' Partial Class In Client Using RIA Services?

Apr 21, 2011

I have extended an Entity Framework 4 entity class with a calculated property in a partial class. This member is not available on the client to which the entities are exposed via WCF RIA Services.when using C# appears to be changing the extension of the partial class file from .cs to .shared.cs. I tried this with my VB.Net solution (.vb to .shared.vb) and got a long list of errors. I believe what happened is that the partial class lost its association with the entity on the client - it inherited from object rather than EntityObject.

My best guess is that this is related to the way that VB.Net handles namespaces.Each project has a 'Root Namespace' which is prepended to anything that is defined within a code file. C# has a 'Default Namespace'which is the namespace into which new types are placed by default - via a namespace statement within the file.The partial class is probably having the client namespace prepended to it which puts it into a different namespace than the entity with which it is associated on the server.Is there any means of extending an entity in such a way that those extensions are available on the client via WCF RIA Services and VB.Net?

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Access Shared Variables Of A Class?

Jul 23, 2009

I am making a small application in which i have added a class module and a window forms in vb.net. i want to acess the shared variables and mathods of class without making any object.

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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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Class Module Which Is Shared Between The 2 Projects?

Mar 29, 2010

I have no idea what is going on here but it is strange to say the least.I created a new solution in VS2008Pro under windows 7 This solution has 2 projects one for the pc and one for a CE based device.There is one class module which is shared between the 2 projects.In VS2005 under xp this same basic project worked fine but here I am seeing error messages that appear out of no where.

Example the CE portion flags 3 lines initially 1 related to a file i.o function and 2 others related to socket methods. All three of these were supported in VS2005 using framework 2.0 which is the same framework I am using here. This is just the tip of the ice berg however.If I attempt to run the code it runs fine for the pc client and of course not for the CE device. If I make any kind of change, add a line, comment a line or just add a comment I get lots more errors with odd messages that are not even valid.

In one case after I saved it jumped from 3 errors to 30, in another case to 50 and yet another to 144 errors yet the only errors that were present were the original 3 that were flagged.The ide threw errors like Try Catch must end with matching End Try.Get no longer supported ' apparently referring to the binary file get but here it is used as the get portion of the property.Get must end with matching end get.It also started complaining about functions and data types.For example saying "an is not declared" pointing to the word Boolean Or telling me my functions are not declared point to only 1/2 of the function name.

I do not see any errors in the code and it reports no errors in VS2005 under XP.As a test I tryed adding a new property to the project after it was telling me there were 144 errors. I allowed the ide to do most of the work and when I hit enter the errors went back to 3. Then I saved the project and the errors went to 105 pointing first at the new property just created.

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Derived Class Shared Methods?

Nov 3, 2010

I have a function that 2 derived classes use, but the third doesn't, would it make sense to just leave it in the base class, even though one of the 3 derived classes doesn't use it?The only way I could think of disallowing the third class is to basically create an intermediate class that is derived of the base, then the 2 that use the common function are derived off the second class.

Is it possible to prevent the 3rd class from using the function, while letting the two that are supposed to use it, use it?Does that just seem to go overboard, I mean as long as I don't "try" to call the function from the 3rd class, it shouldn't be a problem, I just was interested if there was a way to prevent it all together without a lot of hassle.

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Library Of Functions In A Shared Class?

Feb 11, 2009

I have large group of functions that I would like to store in basically a library and simply call the functions from the controls on my forms. Back in VB 6 I would have done this with a module, but now I have been told that a Public Class is the correct way in .NET. How should I go about doing this?

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Shared Class Across A Web Service Boundary?

Aug 15, 2011

I have a class in a shared library, that I have added references to on both the webservice and the client project. One of the functions in the webservice returns a list of this class.

when I try to cast the return value into a List of the class on the client side, I keep getting an error telling me that a 1-dimensional array of type '<webservice.class>' cannot be converted to type '<sharedlib.clas>'.

The reason that I put the class into the shared library, was because I wanted the webservice to return strongly typed data, but I also have a couple of methods in the class. I dont care about them on the server side, but they are needed on the client side. I figured that this would be the "better" method, since in a shared library it is only declared once for both projects.

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Shared Class With Generic Methods?

Jan 28, 2010

I have created a Interface and a couple classes that implement this Interface.  I am in the process of developing a Shared Class that utilizes the functions that each of the individual classes have, due to the interface implementation.What i need to know is how do i develop this Shared Class so that way each of the methods within it are restricted to a single data type.  This single data type needs to be restricted to any class that has implemented the Interface.

Some examples:

Public Interface IVector(Of T)
Sub Add(ByVal v2 as T)

[code]....

As you can see it would allow me to develop one form, since i have standardized the required Subs/Functions for any class the implements the IVector interface.  As i am still in developement, i was wondering if my current understanding of the method generics is correct in its current form or what i would have to do to make the Generic Shared Class work in the fashion that i am looking for in the example implementation.

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Use Shared Property With Class Inheritance?

Jan 12, 2011

I have a base class which defines a shared readonly property like this[code]...

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VS 2008 - Getting Final Value From Shared Class

Dec 4, 2009

I am having trouble trying to get my shared class final value

Class name : Encryption
Public Shared Sub PassEn(ByVal PassTxt As String)
Dim strText As String = PassTxt
Dim salt As String = "61651616516161651615"
Dim bytHashedData As Byte()
[Code] .....

I am trying to call this from the call and get the return hash but when I try to make a global variable it doesn't allow it. How would I call this and get "HashValue" on to a textbox on my form.

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Writing Shared Subroutines In A Class?

Dec 8, 2009

AdamSpeight2008, on 19 Jul, 2008 - 10:50 AM, said:Labels You have a label on a form and If you're using Label1.Caption = "Text for label" it's VB6 If you're using Label1.Text= "Text for label" it's VB.Net Buttons You have a button on a form. To set the text on the button.You're using Button.Caption= "Text on button" it's VB6 You're using Button.Text="Text on button" it's VB.Net

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.net - Enforcing Using The Class Name Whenever A Shared Member Is Accessed?

Jan 20, 2010

We have a coding standard that says all shared (static) fields and methods must be called with the class name. E.g. NameOfClass.whatever Is there a tool that we can use to check this is in fact the case? (Likewise for modules) I should have make it clearer we are using VB.NET.

[Code]...

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Access Of A Shared Member [...] In Custom Class?

Jun 9, 2012

I have a custom class called "Time" with the following function, for determining if one Time equals another Time.

Public Shared Shadows Function Equals(ByVal Time1 As Time, ByVal Time2 As Time) As Boolean
Dim x(2) As Integer
x(0) = CInt(Time1.Hour)
x(1) = CInt(Time1.Minute)

[code].....

Access of shared member, constant member, enum member or nested type through an instance; qualifying expression will not be evaluated.I know it shouldn't do any harm, just let the compiler skip evaluation, but is it a way of getting rid of this warning?

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Accessing A Public Shared Variable From A Different Class?

Jan 10, 2012

I currently have two forms, and I need to share the value of a variable in one of them.

I declared the variable to be 'Public Shared', and assigned a value to it. However,

when I inspect the value it appears as 'Nothing'. Here is the snippet:

Public Class A
Public Shared sVar As String = Nothing
Private Sub A_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

[Code]....

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Call A Shared Method In A Loaded Dll Using Class Name?

May 8, 2012

[code]...

Dim ass as Assembly = Assembly.LoadFile("sample.dll")

Now, I want to call the shared method using the class name.

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Calling Shared Methods From .NET Class Library In VB6

Jan 25, 2010

I have the following class in a .NET class library:

Code:
Public Class JasonTest
Sub New()
End Sub

[Code]....

The .AddNumbers call works fine, but the AddStrings call yields the error 'Object doesn't support this property or method'.

Is there any way to call a shared method from .NET in VB6? I was unable to find any documentation on this.

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