Declare As A Sealed Class (non-inheritable)
Aug 16, 2010How to declare this as a sealed class (non-inheritable) I used this in my main coding..
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Importing An Enum Into A Visual Basic Class So That It Becomes Inheritable
Nov 16, 2011Here is what I have in my file
Option Strict On
Imports MyNameSpace.MyEnum
Public Class AwesomeClass
[Code].....
But since MyEnum isn't defined in the subclass it won't work. I am not very familiar with what these types of things are called, but I think that I am import a type definition of sorts. Since I am Importing, and not defining, it is only available in the first file. Basically, I want to include MyEnum as part of the class but I don't how to do it. I don't want to copy/paste it over, and I don't really want to write Imports ... at the top of all of my subclasses.
Make My Class NotInheritable But Inheritable From Within Library Scope?
Dec 17, 2009How to make my class NotInheritable but Inheritable from within the library scope (friend)
View 5 RepliesVS 2008 Option To Serializing A Non-Inheritable Third-Party API Class?
Jul 19, 2011this is an interesting problem and to be honest, I'm not sure there's a solution to it. But thought I'd ask the brain-trust here and see what comes up.I'm developing a dll that is loaded and ran within a third-party application. The third-party company provides an API to use that leverages their application's internal objects so that I can automate our processes. It's really pretty slick. They have a class object that represents the internal structure of their supported documents, appropriately titled Database. I would like to serialize the Database class using the ConfigurationConverterBase (to create a TypeConverter for conversion to and from) in conjunction with custom configuration elements and properties to store this information and retrieve when necessary. I've created the converter and all the necessary code for the custom configuration process. And it all works like a charm with one exception... the Database object does not have the Serializeable attribute applied.
Since I don't have control over the API they developed, I cannot simply add it. And since it is sealed, I cannot inherit it. This leaves me with an ugly option of converting the document to a temporary file that is a text-based version of it, then streaming it into memory before creating a binary format that can be saved into the config file. This is an ugly approach, but will get the job done.
Does anyone know how to work around the original issue for a more streamlined approach?
Does Making A Class NotInheritable In .NET Offer The Same (potential) Compiler Optimizations As Sealed In C#?
Jan 11, 2010I've read that making a class sealed in C# is advisable in high-performance scenarios because it frees the compiler to make certain optimizations (e.g., inlining property getters) that it wouldn't be able to make otherwise. Is the same true for NotInheritable in VB.NET?
View 1 RepliesInside The Service Class, Declare A Class Variable Named Started?
May 8, 2012Create a class named Service. Inside the Service class, declare a class variable named Started. The datatype of this variable is Boolean.Public Class Service Dim started as Boolean End Class Create a class named Server. Inside the Server class, declare a dynamic array that can contain elements of the type Service.(Note: For convenience, both the array and the variable Started can be accessible from a client program that creates an instance of Server and Service respectively)
Create a constructor for the Service class. When the constructor is executed, it will set the value of the class variable Started to True. Create two new classes: WebServer and DatabaseEngine. Both of these classes inherit from the class Service. Inside the Service class, declare a Sub procedure (method) named Terminate. This method should display the following text Service stopping in a message box when executed.This method can be overridden in classes that inherit from Service class.
Inside both the WebServer and DatabaseEngine class, override the method Terminate inherited from their base class Service. Both methods should first call the base class Terminate method. The messages Web server stopping and Database engine stopping should also be displayed in a message box when the Terminate method for the WebServer and DatabaseEngine are called respectively. These messages should only be displayed if the Started variable inherited from their base class is not equal to False.
Inside the Server class, declare a method named Shutdown. This method does not return any value. When executed, it will call the Terminate method for each of the Service instances (if any) in the arrServices
array. You should call the Terminate method within a For Each loop that loops through the elements of the arrServices array.
In the Sub Main method, create an instance of the class Server. Set the size of the arrServices array in
your Server instance to contain 2 elements. Create first a WebServer instance and then a DatabaseEngine
instance into this array. Call the Shutdown method from your Server instance.
Declare A RANDOM Class Instance At CLASS Level?
May 6, 2010If 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.>>
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Declare An Internal Class Within A Public Class?
Nov 17, 2008how to declare an internal class within a public class using vb.net?
View 2 RepliesDeclare A Class As Friend Of Another In VB?
Jun 30, 2009I have class Aand BHow do i declare the class B as a friend of A?
View 4 RepliesDeclare A Class In Two Files?
Dec 12, 2011Say some function is defined in one file and another function is defined in another file
In C++ you can do that right
Declare An Array As A Class?
Jun 21, 2010I could have an array of players but I cant dim and array as new and my players are all a class I made called gameobject
View 4 RepliesGlobally Declare A Class?
Jun 1, 2009I know you can globally declare a structure so every class knows it.But I have a class named "WPNConnection", but I was wondering if you do like.Public WPN as new WPNConnection but so every class in the whole project could access it. It's just annoying having to raise events to get back to the class holding it, or finding the main class and finding it declared there.
View 2 RepliesMust Declare A 'Sub New' Because Its Base Class
Jul 17, 2010I have a class library that have a lot of classes, in every class I have "Inherits LINQDataContext". And In my xx.designer.vb file I have...
Public Sub New()
MyBase.New(Global.My.MySettings.Default.DbConnectionString, mappingSource)
OnCreated()
End Sub
But I get a lot of "Class 'xxxxx' must declare a 'Sub New' because its base class 'LINQDataContext' has more than one accessible 'Sub New' that can be called with no arguments." errors
VS 2008 Extending Sealed Classes?
Apr 1, 2010Briefly, what I'm trying to do is add some methods and properties to the FileInfo class, which is sealed (NotInheritable). As far as I can tell, I have two options to do this.
1) Inherit from FileSystemInfo (the base class for FileInfo) and recreate the methods and properties added by FileInfo (essentially recreating the FileInfo class from scratch)
2) Use extension methods (??) which I just learned about two minutes ago and it being 1am, I'm going to get into this tomorrow
3) Create a wrapper class around a FileInfo object - I think that's the proper term
Ok, so I guess there are 3 options.
A) Why make a class uninheritable
B) Is creating a wrapper class "basically" the same as inheriting from an object, but at least with inheritence you don't need to create any properties and methods other than those you want to modify or add?
Am I correct when I say that a Field is a protected property that can only be accessed by the base class and inherited classes, or is the definition of a field something else?
Declare New Bitmap In Class' Constructor?
Jun 6, 2009i've declared a bitmap at class level + i want to load an image into that variable in the constructor. i don't know why but it won't work and everything i've tried won't work either.am i missing a reference or something?
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Define And Declare In Class Module?
May 25, 2011below is my code to use binarywriter it work fine on class form1 level
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Name Space And Class No Declare In VS2010?
Nov 13, 2010I have some problems with VS2010,in spite of some of the class are valid in project and using namespace in which page that used that one. but name space and class no declare in VS2010 even application run without error. how can I solve this?
View 5 RepliesVS 2005 Where To Declare Reusable Class
Jun 11, 2010I need to declare an Address(street address) class which can be reused in multiple forms. Where should i declare it?
View 3 RepliesDeclare Variables In Public Class Form1?
Apr 29, 2012When and why do you declare variables in the Public Class Form1 section?
View 1 RepliesVS 2005 Where To Declare A Class To Share Between Two Forms?
Aug 24, 2011There are two forms, first form list's the employees and the second form is used to add,edit the employee record. So to pass the information between the two forms i want to use the Employee Objects.To do so, where should i declare the Employee Class?
View 6 RepliesDeclare Events On Class Library (dll) And Catch Them On Form?
Nov 21, 2009I need set events on a class library and catch them in an form.
For example, I run a sub in the dll and I need "receive" the event that the sub in the class is running.
The dll is creted by me in vb, but i don't know how raise events on it to be catched in the form.
Declare Main Class On FrmMain - Working With Classes?
Jun 3, 2009Currently I declare my main class on frmMain. as public MyClass as new clsMyClass Thus anywhere in the application I would address it as: frmMain.MyClass.Function(MyParam) This does not look as neat as I would like it. Where can I load this Class so that I can address it as: MyClass.Function(MyParam) from anywhere inside the application.
View 6 Replies.net - Extending Sealed Intrinsic Datatypes Using CompilerServices.Extensions-No Way To Reuse?
Nov 11, 2010I defined the following extension of the Date? data type
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But when I moved my compiler definition to a separate DLL, I the ToObject method was no longer available from my project even though I had referenced the Class project which now contained the extension. Is this a limitation of the Compiler Extensions? HOw do you get reusability out of them?
OOP - Declare Two Datatables And Fill Them Both From A Datatable Returned By A Function In Class
Sep 27, 2010When I declare two datatables and fill them both from a datatable returned by a function in class, that when i filter the one it seems to filter the other aswell?
For example:
I declare the datatable and initiate my class:
Dim DatatableOne As New Datatable
Dim DatatableTwo As New Datatable
Dim MyClass As New MyClass
I then call the function that returns a datatable and apply it to datatable1 and 2 Then fill two DataGrids with the table:
DatatableOne = MyClass.GetTable()
DatatableTwo = MyClass.GetTable()
DatatableOne.DefaultView.RowFilter = "Name = 'Tom'"
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For some reason i don't understand but both grids end up with the filtered data?
Declare A WithEvents Class In Windows Form Designer Which Is Not Control Base
Jun 4, 2011I am making a TabStrip control to hold a number of tabs just like TabControl, but only with the tabs, no page. The control has a "Tabs Collection", which stores a list of "Tab" class. "Tab" is not inherited from Control, but each tab has its events. So when the user add a "Tab" in the "Tabs Collection", each "Tab" instance should have a (Name) identifier, which user can access it in the code, and with WithEvents keyword so users can add event handlers to each "Tab". The expected out come should similar to this:
Friend TabStrip1 As TabStrip
Friend WithEvents t1 As Tab
...
Me.TabStrip1.Tabs.Add(t1)
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VS 2008 Class Library - Declare New Instance Of MainClass() Before Using Subs/Functions In Class2 Or Class3?
Feb 3, 2011Namespace MyClassLib
Public Class MainClass
Public Sub New()
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Is it possible to make it so that the user using the Class Library has to declare a new Instance of MainClass() before using Subs/Functions in Class2 or Class3?
Declare A Public Param For Public Class Form1?
Apr 7, 2011Imports System
Imports System.Threading
Imports System.ComponentModel[code]....
how to declare "smsport" on class smscomms as public so that it can be access in class form1 or button1_click event.
Class C Inherits Class D Is Class D A Superclass Or Parent Of Class C?
Dec 16, 2009If Class X is within the scope of Class Y, is X a subclass of Y?If Class A is a sub Class of B, then is Class B considered a super class of A?if Class C inherits Class D is Class D a superclass or parent of Class C?if Class E extends Class F then we can consider Class E a child of F?if Class G inherits Class H and is within the scope of Class I then who is the parent of Class G? Classes that inherits Class J and classes that are within Class J are all sub classes of Class J?
View 1 RepliesForm Inheritance - Error1Base Class 'MenuStrip' Specified For Class 'Lesson2' Cannot Be Different From The Base Class
Apr 15, 2010I 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 RepliesRegister The Class File - Not Recognizing My Class.Even The Intellisense Is Not Picking Up Te Class
Jul 22, 2011I have a class (see below)
Imports Microsoft.VisualBasic
Imports System.Data.SqlClient
Public Class ClientProfile
#Region "Variables"
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It is in the file ClientProfile I have placed in both App_Code and also App_Code/Models
In my code behind I have the following
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The last word, "ClientProfile" has the scary squiggly red line below it. It is not recognizing my class.Even the Intellisense is not picking up te class. Do I have to register the class file in any way?