Inheritance (Private Overrides Function) - Create A Class And All Other Classes Inherit From It And Modify It A Bit

Oct 15, 2011

I am cleaning up some code and I have multiple classes that are 99% exactly the same. So my understanding is that my options are...

1. Create a class and all other classes inherit from it and modify it a bit

2. Create an abstract class and all classes inherit from it and modify a bit ** I took this route

3. Create an interface and all classes Implement that interface.

Here is my 'original' class below (the one that all of them look 99% identical). This class is used in an arraylist so I have a listing of all my images from a folder I have searched.

[Code]...

View 10 Replies


ADVERTISEMENT

Error In Protected Overrides Function Class Datagridview

Mar 29, 2010

I have this class Public Class DGVMod Inherits DataGridView

Protected Overrides Sub OnEditingControlShowing(ByVal e As System.Windows.Forms.DataGridViewEditingControlShowingEventArgs)
MyBase.OnEditingControlShowing(e)
Try

[Code]...

View 3 Replies

Inheritance - Create A Method Called StartWorking() And Want FrmChild To Inherit - Method

Nov 25, 2011

I have a large problem with inheritance in vb.net. The problem is the following:

I have 2 forms => frmBase and frmChild

In frmBase i want to create a method Called StartWorking() and i want frmChild to inherit this method.

But here is the tricky thing: when frmChild.StartWorking is called i would like the following => without calling MyBase.StartWorking()

I want frmBase.StartWorking() to be executed first and after a test in frmBase.StartWorking if blnValue is true then frmChild.StartWorking has to be activated. if blnValue is false that frmChild.StartWorking cannot be activated.

View 2 Replies

Design Patterns - Inheritance - Do All Properties In The Derived Classes Have To Be Declared In The Base Class

Aug 8, 2011

Background:I have a base class and several inherited derived classes. The derived classes don't always need to have the same properties. If any properties are shared among the derived classes, those properties would live at the base class level ('Contents', for example).Similarly, GoodDocument below has 'GoodThings' but would not want/need to have 'BadThings'.I want to treat instances of both 'GoodDocument' and 'BadDocument' as type 'Document'

public mustinherit class Document
public property Contents as string
public sub new()...

[code]....

View 3 Replies

How To Create Class Which Inherit From Data Types

May 30, 2011

How to create a class which inherits from a data type, specifically from Char data type? I just want to add one property to it. If it's not possible, are there any other ways to accomplish this?

View 2 Replies

Best Pratice In Inheritance - Three Classes Employee, Manager And Salesman. Manager And Salesman Classes Inherits Employee Class

Jul 27, 2010

I have three classes Employee, Manager and Salesman. Manager and Salesman classes inherits Employee class.

Employee :

Public MustInherit Class Employee
' Field data.
Protected empName As String
Protected empID As Integer
Protected currPay As Single

[CODE]...

Manager :

Public Class Manager
Inherits Employee

[CODE]...

Salesman :

Public Class Salesman
Inherits Employee

[CODE]...

Now I have created a object of salesman and manager using the following code:

Dim objSalesMan as Employee=new Salesman("xyz",1,2000,5000)
Dim objManager as Employee=new Manager("abx",2,5000,"production")

Is this a good programming pratice or should I use:

Dim objSalesMan as new Salesman("xyz",1,2000,5000)
Dim objManager as new Manager("abx",2,5000,"production")

View 6 Replies

Difference Between Private Sub / Function And Class

Oct 30, 2010

What is the difference between Private Sub /private Function / Private Class and to use them?

View 4 Replies

Create A Derived Class, And Identify The Inheritance?

May 8, 2010

The test is base on Visual Basic inheritance, need to create a derived class, and identify the inheritance.

View 5 Replies

C# - Using Many Classes In GUI That Inherit From A Base?

Oct 20, 2010

I have classes setup similar to this:

<DataContract()> _
Public MustInherit Class SystemTaskProcessBase
Public MustOverride ReadOnly Property Name() As String
Public MustOverride ReadOnly Property Description() As String
Public MustOverride Property Result() As SystemTaskResult

[Code]...

I need to use these classes on the client system, but also need to be able to create these "tasks" through a management interface. Each class (Task) that inherits the base, could have its own properties that are unique to each class, but at the same time, share the same common base class properties. For example, the above shows a reboot task and a delete file task, the delete file task needs to know which file to delete, so has a property for that. But the reboot task does not need this property. So when the management application is creating these tasks, it shouldn't provide a text box for the file property for the reboot task. There may be more tasks created at a later date with completely different properties.

How would I go about providing the WinForms management application a way to enumerate each class into a ListView for example, and allowing the user to create these tasks and filling in the dynamic properties that each class would have? Desired functionality would be to create a task form that creates dynamic controls available for the properties as needed, depending on the public properties in each class, but at the same time have the base class properties available as well.

View 1 Replies

Create A Private Shared Object In Each Class And Lock On That Instead?

Jul 13, 2009

I have created a synchronized queue and am using SyncLock on the SyncRoot property of that queue when I invoke the Enqueue/Dequeue methods. The methods are invoked from instances of standard producer/consumer classes.Is that a proper use of the SyncRoot property?

Would it be better practice to create a private shared object in each class and lock on that instead?

View 1 Replies

Reflection - Function Witch Return Type Is The Class Itself In Inherited Classes?

Dec 10, 2011

I have a parent class that is also a factory. For example:

Public Class Factory
Public Function clone() as Factory
' Some logic here

[code].....

View 2 Replies

Utilize Classes That Inherit The System.Data Name Space?

Mar 9, 2009

I would like to utilize classes that inherit the System.Data name space.Specifically, I would like to have classes CarColumn, CarTable, and CarSet derived from DataColumn, DataTable, and Dataset respectively.I would like to be able to add additional properities to each class. As an example this is how I would like to reference items within the classes:

CarSet.CarTable(0).Columns(0).foo
CarSet.CarTable(0).bar

I know that VB.Net is not capable of Multi-Inheritance.

View 1 Replies

Overrides WndProc From Within Class

Mar 28, 2009

Currently im trying to write a HotKey class, however in order to intercept the messages you need to overwrite the WndProc and check for WM_HOTKEY.

Currently, im using Inherits Form inside of the class, so that it has the option of overwriding the wndproc, but along with that I get all the forms normal events when trying to handle it.

Below is my

Public Class Form1
Private Class HotKey
Inherits Form

[Code].....

View 2 Replies

Create Multiple Classes Of Different Names That Use That Class?

Mar 6, 2009

Okay, say I have a class named "ChannelList", and it raises an event named "FoundChannel"

But what I'M wanting to do is create multiple classes of different names that use that class, but I want to have all of the "FoundChannel" events be handled under one single sub routine?

View 15 Replies

Form Inheritance - Error1Base Class 'MenuStrip' Specified For Class 'Lesson2' Cannot Be Different From The Base Class

Apr 15, 2010

I have put this code in the global form Inherits System.Windows.Forms.Form. And then in the form that will inherit this from the global Inherits MenuStrip. "MenuStrip" is what the global form is called. But keep getting this error: Error1Base class 'MenuStrip' specified for class 'Lesson2' cannot be different from the base class 'System.Windows.Forms.Form' of one of its other partial types.

View 5 Replies

Inheritance And Entity Classes In VB 2008?

Jun 27, 2011

I am having trouble getting inheritance to work with the VB 2008 Express entity classes. I am a beginner with VB.Net and self-taught in VB6.0.I am able to pull data from an SQL Server data base into my application using the O/R designer. The data can be successfully queried using LINQ to SQL, either returning a single record, or multiple records or an entire table as a collection of the enty class type (so the problem is not with LINQ queries).

View 2 Replies

Inheritance In Classes And Extending Subs ?

Feb 26, 2011

I've been wondering if there is anyway to extend a sub of a base class in a derived class or subclass. To date, the only thing I've been able to find is overrides and overloads functions, but to my understanding these functions just ignore your base class's sub and just allows you to run the new one with the same name.

What I want to be able to do is:

CODE:

I'm not sure whether this is possible, or if I'd simply either make a new sub in my derived class that first ran the base's class sub or whether I'd override the base class and then copy and paste the old code.

View 6 Replies

Create A Class To Deal With Records From The Classes Table?

Dec 5, 2010

Create a class to deal with records from the Classes table, much like the Student class we created in Lecture #17 handles Students records. The name of the class should be Ualb_Class (note we cannot use Class, as it is a reserved word in VBA). All of the fields should have corresponding properties. There are few considerations:

The class (course) code, department code, and course number are set at Initialize, so there is only a Get property method for those

The property for Meeting Day only accepts one of the values defined in the table. You can decide whether to accept an integer value or a string value of the days represented.

You are also to code the Initialize method, much like we coded the Initialize method for the Student class in Lecture #17. In the Initialize method, you will use the InputBox function to obtain the department code and course number. use a different InputBox for each value, so you don't have to mess with separating the single text value returned from that function. The Course Code will be obtained by using a function that has already been created, called GetNewCourseID. It has no parameters.

TABLE: Classes
Field Name
Data type

[Code]....

View 2 Replies

Difference Between Public Sub And Private Sub And Private Function And Public Function And Sub And Shared Function?

May 31, 2011

explain me the difference between them? I'm new to visual basic, and I need to know the very basic things in Visual Basic allowing me to become a professional User

View 8 Replies

Create A Generic Shared Class That Can Operate On Predefined Classes

Jan 27, 2010

I have an interface that i have declared some of the basic internal functions, subs, properties, etc. This interface is then implemented into 3 pre-defined classes. These classes are end-use classes so they dont get derived or inherited elsewhere. I am trying to create a generic shared class that can operate on each of these 3 predefined classes and potentially more as long as they implement the interface.

[Code]...

View 10 Replies

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".

View 1 Replies

Overload Operator In Generic Class With Generic Interface Of Super Class And Inherit Class?

Jan 21, 2010

I can do this without problem.

Class A
End Class
Class B : Inherit A
End Class
Dim Obj1 As A = New B

View 4 Replies

What’s The Difference Between Private Sub And Private Function

Dec 14, 2011

I am completely lost on procedures. Whats the difference bewteen Private sub and private function?

View 1 Replies

Class Inherit From Another Class And Implement An Interface?

Jun 18, 2009

class inherit from another class and implement an interface?

View 4 Replies

Using Inheritance-Based Controls - Creating As New Classes (not UserControls) Inheriting From An Existing System Control

Oct 15, 2011

I seem to be having a problem with controls that I am creating as new classes (not UserControls) inheriting from an existing system control. Everything seems ok while I create the control code, through to the compile (which is successful and adds the control to the toolbox) and dragging the control from the toolbox to the GUI surface. However, when I then debug or compile the project, I get a message such

[Code]...

View 2 Replies

Suppress Private Variables In .NET Classes?

Feb 28, 2010

Does anyone know how to supress the private variables from showing in the .NET Namespace? I have a Class that looks similar to this.

[Code]...

View 5 Replies

VS 2010 Structure Classes So That The User Interfaces Though A Single Class While The Supporting Classes Are Hidden From Their View?

Jun 13, 2012

How can I structure my classes so that the user interfaces though a single class while the supporting classes are hidden from their view? I think its best understood in an example:

Public Class MyInterface
Public Economic as EconomicClass
Public Sub New()
MyBase.New()

[code].....

So you might ask why am I even separating them? It's strictly for others who will be working with this interface. I need to funnel them though a logical structure:

interface.Economic.MyMethod
interface.Currency.MyMethod
etc

This way everything is already handled for them in the background and they only need to run the method they need. I don't know if I can have it both ways in VB.NET.

View 23 Replies

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.

View 7 Replies

Asp.net - Inherit Same Method For 2 Different Class?

Sep 22, 2010

How to simplify this, 2 method in class are identical.First class.

Public Class Gui
Inherits System.Web.UI.Page
Public Sub CreateStyleLink(ByVal StyleArray() As String)

[code].....

View 1 Replies

Inherit Same Method For 2 Different Class

Dec 19, 2010

How to simplify this, 2 method in class are identical.[code]

View 3 Replies







Copyrights 2005-15 www.BigResource.com, All rights reserved