VS 2010 Simple Classes And Delegates?
Dec 5, 2010I've been trying to do this for a while now.What I intend to do is that when I load a webpage in a class, i raise event to my form that the data is recieved.
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VS 2010 Structure Classes So That The User Interfaces Though A Single Class While The Supporting Classes Are Hidden From Their View?
Jun 13, 2012How 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.
VS 2010 Calling Subs And Functions Within Classes That Are Within Classes?
Oct 24, 2009Here 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]....
Delegates And Multicast Delegates In .NET
Mar 27, 2009What are Delegates and Multicast Delegates in VB.NET? How do I use them? provide a simple example to illustrate the concept.
View 1 RepliesSimple Inventory - Program Using Classes Hard Coded - Database Named "DATABASE" In Ms Access 2003
Sep 29, 2010I want to create program in vb2008 express with ms access database. Can somebody help me so i can learn how to program using classes hard coded. I have learned vb6 before but it has a big difference on vb2008.
I have a database named "DATABASE" in ms access 2003 and the details are: Table :
EMPLOYEE(EmpNo, EmpName), DEPARTMENT(DeptID, DeptName), CATEGORY(CategoryID, CategoryName), SUPPLIER(SupplierID, SupplierName), ITEM(ItemID, Itemname), ITEMLIST(ItemListID, ItemID, ItemDescription), INVENTORY
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All the CAPITALIZED name are Table and all items inside the parenthesis are fieldnames. I don't know where to start on working on this RECORDS. I was able to understand visual basic 6 a bit, and i am trying to apply the coding to VB 2008 but all i get is errors. I am hopeless now and i need help to be able to start my programs. If someone can give me a sample code, i think i would be able to trace the line of code to be able to understand it. I am currently an inventory manager on the small company i was working with and i like to organize my record by using database.
VS 2010 - Classes Vs Structures?
Dec 11, 2011For the time being I have been using a Structure to store "people" (their name, gender, age, etc...), because I really love to refer to something like Mike.name or Caroline.age, so I could simply put Caroline.age += 1 anywhere in the code and here you go, Caroline is one year older. No more simpler.But because of how inflexible (compared to Classes) Structures appear to be, when I needed to iterate through all the instances I was forced to use a list or dictionary so I could use a FOR EACH ... NEXT block. That was resolved by you people in the previous post, but I'm having the problem that I couldn't use the elements of the list to change the original instance of the Structure proper... I mean, if I code something like this...
For Each thisperson As Person In peoplelist
If thisperson.name = person_selected Then
'person_selected is the SelectedItem.ToString of a listbox[code]....
Well, I thought that thisperson.teamleader and Mike.teamleader were going to be equivalent (when the IF statement was true, that is) but that doesn't appear to be the case. So right now I'm really hating Structures...But when I look into Classes... well, they have more flexibility, yes. You could construct a FOR EACH block without any other trick like the "on-top" list, and that it's very useful indeed, but (a big "but" IMHO) I lose that NICE feature that makes possible to write the name of one of them instances like Mike.age or Caroline. kills
I mean, if I wanted to add a year to Mike, well... there is no "Mike" in the first place. A "Mike" string could be a property for the class, but I cannot (or know) magically refer to him with the ease of a Structure, so when I want something so simple as Mike.age +=1 ...well, with a Class I'm simply clueless to how locate him and change ANOTHER property of him.I suppose I am doing something very wrong, because I cannot believe VBasic could force on you those two extreme philosophies...:
Classes = +flexibility -usability ???
Structures = -flexibility +usability ???
What I want to do is SO simple that I cannot believe I need to choose between the two.
VS 2010 How To Organize Classes
Jun 28, 2011I need some help with how to organize classes in VB.NET. I have a class called parent with methods for adding, deleting etc. But I also need a method that returns a list of all the parents, a list with parent objects. Where do I put this method? Do I put it in the parent class or do I need to make another class called parents?
View 1 RepliesVS 2010 Nested Classes
Oct 16, 2011I've seen people discourage other from using nested classes, because the make things more complicated and are evil and whatnot.But I want to know what possible justification there would be for using a nested class and if there are any possible benefits for using them(or structures for that matter).
View 10 RepliesVS 2010 Using Variable In Different Classes?
Oct 21, 2010Public Class Form1 Dim CharList As ArrayList Private Sub btnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click CharList.Add(TextBox1.Text.ToUpper)End Sub Private Sub btnClear_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnClear.Click
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Use LINQ To Filter Collection Of Nested Classes To Yield Dictionary Of Unique Properties Of Those Classes?
Jan 23, 2012I 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 RepliesVS 2010 Dice Roller Using Classes And OOP?
Nov 16, 2011For a class project (online course, no instructor handy to get a quick reply from -_-) we are to write a short program using classes and OOP to roll a pair of 6-sided dice 1000 times and count the number of times the total of the two dice is 7. Easy enough, and I've read over a few examples that people have written, but they don't seem to use OOP. I'm not asking you guys to do my homework for me, but I am terribly lost when it comes to using OOP. So far I understand that I should be using a Random() class object to determine the roll itself, and then maybe load each roll into an array and use a loop to check if each element is 7 or not, and then increment a counter? How do I set the range of Random() so my dice rolls are representative of a 6 sided die? It's all a bit overwhelming and I'm not sure what I should do next.
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VS 2010 Finding Built-In Classes?
Feb 24, 2011What are the best ways you guys recommend to search the MSDN Code Library. I know there have been several instances in searching for ways to do something, doing a long workaround, and finding out later that there was a built in class that handled the problem that I was working on much simpler.
So what are some of the ways you guys use to find tools, classes, etc. when coding. Or are you just that awesome already.This is kindve just a general tips and tricks question. Sorry if Im in the wrong forum mods.
VS 2010 Multiple Classes In Namespace?
Oct 26, 2011Is it possible to have multiple classes in a namespace and be able to reference the functions within the clases if the Major class is instaniatated from another class?? for instacnce:
Namespace Database
Public Class Data
Public Class Prepare
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VS 2010 Public Variables For All Classes?
Mar 30, 2011I have a MDI application and a very complicated class there which populates its properties from a dataset derived from an external database. Each form, including child forms have to be able to access that class and use its properties thorughout the whole session.I don't know where to 'preserve' these property values within the application. I kmow many books etc. suggest not to use public variables but I really can't find a way to solve this other than to use a public variable (which is a list(of my custom class) in this case.
I have a separate class called PublicItems.vb and declared there my public variable as
Public Shared secuniverse As List(Of myCustomClass)Is there something wrong with the syntax because if I try to use the variable secuniverse in my main application class, I get the following exception:'sectoruniverse' is not declared. It may be inaccessible due to its protection level.
VS 2010 Variable Scope In Nested Classes?
Jul 13, 2011I have put together the following code to illustrate the problems I've been struggling with:
Public Class OuterClass
Private _OuterProp1 As Boolean = False
Public Property OuterProp1 As Boolean
[code]....
I need to be able to refer to outer class properties and variables in an inner class, and I need to have a variable in one inner class set in a different class. I've tried Public, Private, Protected, Friend and all kinds of combinations of them, and I can't figure it out.
VS 2010 - Automatically Adding Namespaces To Classes Within Folders
Jul 26, 2010Is it possible to have visual studio 2010 automatically add namespaces to classes within folders just like c#?
View 1 RepliesVS 2010 Make Classes Import Into Main Form.vb
Mar 20, 2012I was just wondering how you can make classes import into your main Form.vb
Let's say I make a class with the following.
Public Class OtherStuff
Public Sub HideMe()
Form1.Hide()
[Code]....
How could I make the Form1.vb include the things that are in OtherStuff.vb.
All of the solutions that I have tried come up with the same error. Reference to a non-shared member requires an object reference.
Derived Classes Cannot Raise Base Classes
Jul 10, 2009I m trying to raise Click event of Textbox explictly but I m getting "Derived classes cannot raise base classes" error.[code]....
View 1 RepliesMaking A Simple HEX Editor With VB 2010?
Mar 3, 2011I'm making a simple HEX Editor with VB 2010. As a result I am trying to automatically leave a DataGridView cell after entering two characters and move onto the next cell
View 1 RepliesSimple Text Printer In 2010?
May 13, 2010In VB6, when I wanted to print text, I would do something like this...
Dim TextToPrint as string
TextToPrint = LastName(1) & ", " & FirstName(1) & " " & G(1,1) & " " & G(1,2) & " " & G(1,3) & vbCrLf
TextToPrint = LastName(2) & ", " & FirstName(2) & " " & G(2,1) & " " & G(2,2) & " " & G(2,3)
TextToPrint = LastName(3) & ", " & FirstName(3) & " " & G(3,1) & " " & G(3,2) & " " & G(3,3) & vbCrLf
Printer.Print TextToPrint
What's the equivalent in VB 2010?
VS 2010 : Creating A Simple Browser?
Oct 13, 2011I am trying to create a simple browser that will be mainly for personal use. I followed a tutorial to create the actual browser; the address bar and the Go button and now I need to create the Home button, Back and Forward button.If I can find the source code for it, I am going to implement it into my sample browser and perhaps?
View 20 RepliesVS 2010 Can't Connect To Simple .MDF Database
Dec 8, 2010I'm trying to connect to a .MDF database (created via VS2010), but I'm having some issues.
My code is simple:
Imports System.Data.SqlClient
Partial Class MasterPage
Inherits System.Web.UI.MasterPage
[code]....
I get error on line connection.Open().
The path of my DB is App_DataVisitas.mdf
It may be my connection string.
VS 2010 Simple Dynamic Text Box
Apr 28, 2012I can't understand why this isn't working [code]I've created that text box. And I'm trying to use this event handler, to change the value of the public variable oName. But I'm getting an error saying that Text is not a member of HeroName.[code]
View 6 RepliesVS 2010 Simple Low Pass Filter?
Jan 29, 2012How would I implement a simple low pass filter in VB.NET? I have a byte array of 8-bit sound values sampled at 44.1 KHz and I would like to apply a crude and simple low pass filter that starts to roll off around 2.5 KHz. Nothing fancy - I'm not expecting lots of dBs per octave, just something to slightly reduce unwanted HF components. When I Google this all I seem to find are complex FFTs and other functions derived from electronics design packages that are way beyond my math to have any chance of adapting them for VB.NET.
I have tried some very crude averaging: take sample 0 and sample 2, average them and put the result in sample 1. It sort of works but is probably a bit too crude.
VS 2010 Simple Spell Check
Dec 19, 2011i'm trying to write a basic code to check a single word in a textbox against a text document, but i have no idea how to handle outside files (in this case the text document) also i would like to have an "add" option that adds the input from the textbox into the .txt file..What is the code for the relationship to the .txt file and how should i declare the variables relating to it?
View 4 RepliesVS 2010 Simple Test Program
Jan 1, 2012I would like to develop a very simple question-answer program whereby there is a user form with a label which contains the question, a text box where the user enters the answer and a button that the user clicks to change to the next question. This should be rather simple but I would like to have about 500 questions in the end (will be slowly adding more questions).
View 19 RepliesHow To Do A Seemingly Simple Object-oriented In .NET 2010
Jun 17, 2010how to do a seemingly simple object-oriented problem in VB.NET 2010. Basically, I want to be able to write code such that I could do the following:
Dim myObject as Object
myObject.Group1.Command1()
myObject.Group2.Command2()
[code]....
Very similar to how VBA handles objects, such as in Excel, I can use
Dim myBook as Workbook
Set myBook = ActiveWorkbook
myBook.Sheets(1).Range("A1").Value()
to get the value of the cell "A1" on the first sheet. This structure has been eluding me for some time now, and it would be great if anyone could suggest how to do it. I'm currently using a class and declaring all methods as Shared Friend inside subclasses, which throws warnings when I use it as I want to in other code.
VB 2010 - Creating A Simple Db - Overwhelmed With Choices
Aug 1, 2011What is the simplest and most straightforward way to: Create a local dB with a table with 2 fields (a string, a number) Determine is string s is present in the dB Add a record into the table consisting of a string and number Delete a record based on the string Get the record for a particular string Get the record with the highest number
View 3 RepliesVS 2010 Create A Simple Yet Cool Splashscreen?
Jul 5, 2011how to create a simple yet cool Splashscreen?
View 9 RepliesVS 2010 Simple Program - Unable To Get It To Function
Jun 20, 2010I am trying to write a simple program but am unable to get it to function.
Module Module1
Private Property sum As Object
Private Property number2 As Integer
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