Use A New Class Rather Than Add To An Existing Class?

Feb 27, 2009

I have a class called Player in the business layer of my web application.Player class has fields PlayerID, CategoryID and CountryIDA function in Player Class calls a function in PlayerDB Class in the Data Access Layer which in turn calls a stored proc which returns data for PlayerID, CategoryID (foreign key to Category table) and CountryID(foreign key to Country table) from the Player table.I now have a situation where I want to add Country Name and Country Image (url path) to the above call, returning the new fields from the Country table for each CountryID.My question is, do I add the country name and country image as additional fields to the Player class or do I have new classes called Country(BLL) and CountryDB(DAL) and a new stored proc?

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Add / Implement An Interface To An Existing Class Without Changing Code Anywhere That Call The Class And Functions

Mar 1, 2010

I need to create unit testing project for my current website. The currentw ebsite si written in VB. All unit testing examples are using interface to create mock object. My current VB class does not implment any interface. Can I add interface and implement it to my current class and functions without affecting or changing codes to any pages in my website that call the functions? For examples my current class is like:

[Code]...

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Add An Existing Class To A Class Diagram?

Jan 10, 2010

We can add class in class diagram and voila the code show up. What about the other way around. Say we already have a class. Can we add that to class diagrams?

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Class C Inherits Class D Is Class D A Superclass Or Parent Of Class C?

Dec 16, 2009

If 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?

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Attributes.Add("class", "className") But Preserve Existing Class?

Nov 1, 2011

Simple thing, well, I think it is.I need to Add a class to an element within an asp:repeater under certain conditions, using VB.

So, I can do
ITEMID.Attributes.Add("class", "classToAdd")
But this removes the existing classes and therefore screws up my CSS.

[code].....

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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.

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Add A Class To An Existing Project?

Jun 27, 2009

I found what i was looking for on this old thread but I don't know exactly what to do woth it. The code given by Tall Dude seems to compile fine except for two errors..

[Code]...

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Register The Class File - Not Recognizing My Class.Even The Intellisense Is Not Picking Up Te Class

Jul 22, 2011

I have a class (see below)

Imports Microsoft.VisualBasic
Imports System.Data.SqlClient

Public Class ClientProfile

#Region "Variables"

[CODE]...

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

[CODE]...

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?

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Add An Extra Method To An Existing Class?

Sep 24, 2010

Suppose that I want to implement another method for a class namely hasFiles for System.IO.Directory , How can I do that?

for example if I add <Extension()> _ tag before each function or Sub I can add a new function or method for each Control.

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Inherital Class For Existing Element?

May 30, 2010

I still can't understand classes in VB.net and I fell myself like a child.. I have found on MSDN example:Almoust everything is clearly, but DataGridView1 is created in this code in programm. If I have already DataGridView1 that created in designer - how can I override it events and ground it on other class?

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Open An Existing VB Class File?

Jun 30, 2011

I want to open an existing VB class file, add a few properties and close it again.

Simple enough, I thought: Take the CodeDom, a VBCodeProvider, parse the code (using the Parse-method), then identify the location where I want my stuff added (doubtless using some nifty LINQ expressions), add a bit of code and then have it generated and here we go.

Now I see that Microsoft apparently added the Parse method only for the fun of it but never implemented it.

What's the story here? Can I only generate code from scratch? Is it not possible to load existing code?

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How To Compile Single Class Into Existing Project

Mar 18, 2010

I have a VB.NET solution (call it S1) which produces a .vb file (say File1.vb) to be compiled and then included in another solution (S2). S2 is a console app which I want to run from a cmd prompt, not VS. My plan is to shell out from S1 to run a batch file to do the compile and then copy the .dll file, overwriting the old one in S2 (then I can run S2 in a separate operation). Here's the batch file for the compile:

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Overload Method To Existing Public Class?

May 8, 2009

I have written a method to replace multiple characters in a string. Is it possible to overload my own method to the existing method "Replace" in the String namespace?

Function Replace(ByVal inValue As String, ByVal ParamArray replacechars() As String) As String
For i As Integer = 0 To UBound(replacechars) Step 2

[Code].....

As you can see it have a different signature from the public method so I think it would be nice to have my method overloading the existing method

I can live with it if it isn't possible. See it as a "nice to have"

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C# - Rewriting Existing Functionality In The .NET Base Class Library

Apr 14, 2009

Relating to another question I asked yesterday with regards to logging I was introduced to TraceListeners which I'd never come across before and sorely wish I had. I can't count the amount of times I've written loggers needlessly to do this and nobody had ever pointed this out or asked my why I didn't use the built in tools. This leads me to wonder what other features I've overlooked and written into my applications needlessly because of features of .NET that I'm unaware of.

Does anyone else have features of .NET that would've completely changed the way they wrote applications or components of their applications had they only known that .NET already had a built in means of supporting it?

It would be handy if other developers posted scenarios where they frequently come across components or blocks of code that are completely needless in hindsight had the original developer only known of a built in .NET component - such as the TraceListeners that I previously noted.

This doesn't necessarily include newly added features of 3.5 per se, but could if pertinent to the scenario.

Edit - As per previous comments, I'm not really interested in the "Hidden Features" of the language which I agree have been documented before - I'm looking for often overlooked framework components that through my own (or the original developer's) ignorance have written/rewritten their own components/classes/methods needlessly.

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Use An Existing Class To Implement The Standard DES (using ECB) To Encrypt DES File

Jul 27, 2010

link that implements DES algorithm with CBC. if I want to use an existing class to implement the standard DES (using ECB) to encrypt file, how do i do? I want to use this class because it implements each step of the algorithm.

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VS 2010 Adding Properties To An Existing Class / Control

Sep 27, 2011

Is there any way to add new properties to a control? For example, I'm using an "OvalShape" from Microsoft's Powerpacks, these are designated as "Cells". I would like to add properties to the class itself (if I had a physical class to edit) for different processes such as "energy level", "family number", "mutation", etc. General variables that are either Boolean, Integers, or etc. If there isn't a way to edit the powerpack class itself, is there a way I can use the ovalshape power pack in my own class and add extra properties to it myself?

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MovablePictureBox - Set The Flags In All Other Existing Instances Of The Class, When It Is Set To True In The Selected PictureBox?

Apr 17, 2010

if I have several of these movable PictureBoxes added to a Form (Form1) and want to display a selection rectangle only on that PictureBox, that is just selected,then I think I should use a flag to mark whether a PictureBox is selected or not. The flag could be used in paint event to decide,whether the selection rectangle is to be drawn or no .To add a flag property to the new class is no problem. But how can I set the flags in all other existing instances of the class, when it is set to True in the selected PictureBox?

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C# - Get The Type For A Class By Sending Just The Name Of The Class Instead Of The Class Itself As The Parameter?

Sep 11, 2009

Dim a as Type=GetType(className) would gimme the type. But I have only the name of the class as string. I want something like GetType("class1") which would return the type.

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Can't Make Difference Between Public Class And Private Class And Friend And Protected Friend Class

May 15, 2009

I can't make difference between public class and private class and friend and protected friend class.

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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

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VB Class (class File - Not School Class)

Aug 9, 2011

so I used to mess around with C#, just a little. And someone had helped me make a class for Visual C# that was supposed to do the math parts for "internal structure" - which the program used for a part of its calculations and screen... Basically there were 2 options. Endo-Steel and Standard. The user would use a updownbox to determine weight of the machine and then internal structure was a % of that total. If it was standard then it was 10% of the overall weight, if it was Endo-Steel then it was 50% of standard (so 5% of total weight) rounded to next 0.5 (so .25 was .5, 1.25 was 1.5, 1.75 was 2.0, etc). I have the code for the C# class file for it, but want to make it in VB.

[Code]...

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Adding Auto Width (.width = -2) To Existing Listview Class?

Nov 7, 2010

I'm using the next class to fill my listview

Imports System.Data.SqlClient
Public Class ListViewData
Public Sub FillListView(ByRef MyListView As ListView, _

[code]....

I want all the listview columns to be in auto width. I tried adding the next line of code but then only my first column fills my entering listview width. All other columns are not affected!

lvwColumn.Width = -2

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Create A New Class That Inherits From The Base Form Class And Define A New() Method With Parameters?

Oct 1, 2008

I've been creating short test apps repeatedly to try to understand some of the concepts in VB.NET.For the most part it has been illuminating.I read Bucky's .NET knowlegebase tutorial on passing objects as parameters to newly created forms. He shows how to create a new class that inherits from the base form class and define a New() method with parameters Extending the concept I thought about doing the same thing with a form that was created at design-time (In this case Form2).

[Code]...

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.NET Multithreading / Calling Invoke On A UI Control From A Class In A Separate Class File?

May 13, 2011

Example:

Two files - TestClass.vb, myForm.vb

TestClass.vb looks as follows:

Imports System.Threading
Public Class TestClass
Private myClassThread As New Thread(AddressOf StartMyClassThread)

[code]....

The result:Application runs, no errors or exceptions.Displayed is the listbox and the Start button.I press the start button and a msgbox says "Not Invoked" as expected and upon clicking OK to that msgbox "Start Button Pressed" is added to the Output listbox control.Immediately following that the msgbox pops up again and says "Not Invoked". I was expecting "Invoked" as a separate thread is trying to use the Output listbox control.Of course this results in the Output.Items.Add being attempted which results in no visible result as the thread is not allowed to directly update the UI control.

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Access To Object Passed ByRef In The Constructor Of A Class Through Another Part Of The Class?

Aug 18, 2009

I have some classes, BsfciFile and StudyFlashCard. Bsfci is the extension to which I save my set of flashcards in an INI format. I am currently working to transform my code from using Windows API calls to access the INI to using a IniFile class that I found on the internet. I would like the BsfciFile to have a Array of StudyFlashCard objects, but I would like the StudyFlashCard class to use the IniFile class object contained in the BsfciFile class. I can pass the IniFile from the BsfciFile class to the constructor for the StudyFlashCard class, but I want it to modify the same IniFile as the BsfciFile class has later on.

[Code]...

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Any Event Built In The Class That Is Fired Automatically When A Class Is Deserialized And Ready To Be Used?

Nov 18, 2010

I have a class that is stored after serialization and compression.Is there any event built in the class that is fired automatically when a class is deserialized and ready to be used??

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Call Method Base Class In Program Passing Sub Class Objects?

Apr 22, 2012

Base class has one field to hold numeric balance value. With 2 methods that accept arguments for adding and subtracting the new input calculating new balance. Sub class has four fields dates, transaction, memo and amount.I have a deposit form, and withdraw form. Each time one transaction is entered it creates an object with sub class fields, then adds to the account collection. My problem is not understanding how to call the deposit/withdraw method and pass the current transaction amount back to the base class to alculate the new balance. Does anyone have any links to information/tutorials on how to perform something like this? As you can see with my code I have tried various different approaches without any success.

[Code]...

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Inside The Service Class, Declare A Class Variable Named Started?

May 8, 2012

Create 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.

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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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VS 2010 : Create A New Class And Have Each List Item Of That Class Such As 'btnID', 'btnText'?

Apr 27, 2011

I want to read a number of items from a file and then associate each of those items with a new button at run-time, so that when the user clicks one of the buttons I can display some information about that item.Can I use a LIST to manage these buttons and items? Can I create a new class and have each list item of that class, such as 'btnID', 'btnText', etc... ?

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