created class TestA. There is Sub mysub defined inside it. Now I want to use this Sub in other class. So far I did like this:
Dim oTestA As New TestA
Dim dblA As Double
dblA = oTestA.mysub
[code].....
Here is some example code of what I mean:
vb
Public Class Form1
Private Sub Button1_Click(ByVal sender as Object, e as systemEventArgs) Handles Button1.Click
[Code]....
I`m a beginner in programming and i`m having problems calling an instance of my nested classes. I`m using VB.net and my code is something like this
[Code]....
I have an original assignment that works fine, now I need to go back and make it into classes. I am not 100% how to do this. My issues are with calling the classes to be used in the main form, and what to put into the classes.
I will post the original working assignment and my understanding of the classes.
[Code]...
I Have just been watching a video on throwing Exceptions. Are you supposed to throw System.Exceptions from within your custom classes. to the calling code, Which other way can they communicate. I have read in several places it is bad practice to throw SystemExeptions.
View 3 RepliesI have two classes, one nested in the other. [code]Neither "Name" or "ID" are unique between operations and records.I wish to construct a dictionary using LINQ = Dictionary(Of String, Of List(Of Integer), whereby the keys are uniqe examples of Names in my collection and the values are the collective set of distinct IDs that are associated with those names.
View 2 RepliesHow 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.
I m trying to raise Click event of Textbox explictly but I m getting "Derived classes cannot raise base classes" error.[code]....
View 1 Repliesso far i got
code
For Each item As Reflection.FieldInfo In GetType(NameSpace.ClassWithNestedClasses).GetFields
rtfAppend(item.Name & ":" & Tab & item.GetValue(Me))
Next
For Each item As Reflection.PropertyInfo In GetType(NameSpace.ClassWithNestedClasses).GetProperties()
[code]...
which gets me the simple string vars and properties of my top class, but how can i apply this to loop through all sub classes and get there vars and props?
Searching the internet finds no less than 700 different ways and opinions to accomplish what I'm trying to do, and I would just like to know the simplest, most bullet-proof way possible.
[Code]...
I simply want to extract the string "bar," which is inside <hostName></hostName>I can do this easily enough with simple string functions, but I'd like to do it with one of the .NET XML classes/methods.
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")
I find that I write a lot of code within my classes to keep properties in sync with each other. I've read about Events in Classes, but have not been able to wrap my head around how to make them work for what I'm looking for.For example, in this one I always want to keep myColor up to date with any change whatsoever in any or all of the Red, Green or Blue properties.
Class myColors
Private Property Red As Byte
Private Property Green As Byte
[code]....
If one or more of those changes, I want myColor to be updated. Easy enough as above, but is there a way to work with events that would automatically do this so I don't have to put myColor = Color.FromArgb(Red, Green, Blue) in every sub routine?
How can I create a namespace and classes in it, then save it, and reuse the namespace in other projects? Do I have to click on Create Class Library in Visual Studio?
View 2 RepliesI am new to .net and was wondering if there are any projects which have sets of vb.net classes online which i can use. For example we have Flourish — PHP Unframework which has lots of php classes therefore a programmer doesn't not to replicate code on each project. Is there a asp.net (vb) resource website or any open source project which has built in vb.net functions.
View 3 RepliesI have a slew of sub routines that I need to use in my software because each website that I will be accessing don't all use the same methods.....go here...click that...go here...click that...etc etc
So I've divided them into sub routines and call them when I need them but the coding is getting so long that it's becoming confusing to keep up with each sub.
Is it possible to place the sub routines into an independent file like a class and then call them from the file when I need them so I can free up some space to code?
The 1st part of the code required me to write a class definition for a class(Worker). The class should include Private variables and Property procedures for a worker object's name and salary.
The salary may contain a decimal place. The class should also contain two constructors:a default and a parameterized.
The second part for the code indicates that I need add a method named GetNewSalary to the Worker class.The method should calculate a Worker objects new salary, which is based on a raise percentage provided by the application using the object.
Before calculating the new salary, the method should verify that the raise percentage is greater than or equal to zero. If the raise percentage is less than zero the method should assign the number zero as the new salary
There are three text boxes which allows the user to enter the employees name current salary and raise percentage....the calculate button will display the new salary in the new salary label box...so far here is what I have for the worker class.
The Class for the code had to be written from scratch. Can you please look over the class code and see if I need to chang anything....that will allow the program to run.[code...]
'A way to connect to SQL with VB.Net using Classes
'This must be a class on its own
Imports System
Imports System.IO
[code].....
How can I add c# classes to my vb project. I am using vb .net express 2008
View 1 RepliesI am trying to get to grips with Classes and how to use them "efficiently", So bearing this in mind I decided to create a small class driven application.I am struggling to understand how I can "use" this new instance of this user somewhere else.
Test Data was
Name : Joe
username : JoeBloggs
Password : JoesPassword
[code].....
Now this works and updates the listbox with the new instance of the user but how can I use that instance from the listBox control to retrieve that users details?
As easily as possible? How to parse and create XML easily?
View 3 Replieshow to write classes. I have been searching and I understand classes a little. What I am confused on is how to write a class that contains more than 1 bit of information. How would I write a class that contains someone First Name, Last Name, Age, Address, City and State they live in. For instance all the information in the class can be retreived if I enter the person last name. And the class has to have more than 1 person infomation in it.
View 8 RepliesIDE: VS2010 Framework.net: 4.0 I created a c# dll project under Visual Studio 2010, with several public classes, and I would like to use its classes inside another dll project, but written in vb.net.
In the vb.net dll project, I referenced the built c# dll, but impossible to import the c# classes. The namespace of the c# dll is even not recognized.
What must I do to see my c# classes? If this is possible.
[Code]...
How do I integrate C++ into Visual Basic applications made in Visual Studio?
View 4 RepliesI've often wondered why would you need to make your own classes in vb.net? What purpose can they serve a typical application that cannot be already down without creating them?
View 2 RepliesI am trying to do is get interoperability between my "mainwindow" and a class. As far as I know the way to do this is to create an instance of the class (in "mainwindow") for example and then use that instance to call the functions etc... This works. However I want to allow the class to call functions in the "mainwindow" The moment I declare the instance on the class as well it goes into an endless loop.
View 4 Repliesi have always just bundled code into my main form. I am trying to tidy this up now and start using classes. But when should you use a class?For example. Say we have a function thats called by a button.
[code]...
this is more clutter to the main form, so would i add this to a class? or am i going about this all wrong?If the answer is yes. Then im not quite sure how you call a class function.How would i have this function in a class and be able to call it from formMain?
So Im having trouble taking the code i have and being able to break it down into a tip class and a total class along with the main form. i did the whole code in on form and now im so confused on how to break it down.this is what i have! its alot because im using radio buttons.. on and im using visual
Option Strict On
Option Explicit On
Imports System.Convert
[code].....
What advantage is there, if any, to using Modules rather than classes in VB? How do they differ, and what advantages/disadvantages are there in using modules? In VB or VB.NET, I use both.
View 3 RepliesI am using a third party .Net dll in my code and when I add a reference to this dll from a VB.Net application it shows different classes in intellisense and object browser than when I use it in a C# project. Why is there this difference? If designer intended it that way I'd like to know how to do it in my own dlls.
View 3 RepliesI have a little syntax declare problem in VB.Net.
Dim proxy As USImportoerServiceTypeClient = DMRUtils.CreateAndConfigureClient()
Dim request As New USDeclare_I()
request.DeclareCollection = New US_ITypeDeclare() {}
[code]....
This above code do not work, becase the "US_ITypeDeclare() {}" is empty an only contains a new DeclareCollectionStructure
declare a KoeretoejErklaeringStructure to this an set this date value til "DeclareCollectionStructure.DeclareCollectionValidDate" ?
