VS 2010 Using Variable In Different Classes?

Oct 21, 2010

Public 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

[Code]...

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VS 2010 Variable Scope In Nested Classes?

Jul 13, 2011

I 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.

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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, 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.

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VS 2010 Calling Subs And Functions Within Classes That Are Within Classes?

Oct 24, 2009

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]....

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Optional 'Color' Variable Parameters In Classes?

May 27, 2010

Is it possible to make Color variable parameters in custom classes Optional?Everytime I try, it gives me a "Constant expression required" error.[code]

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Declare A Variable To Be Shared By 2 Forms (classes) In The Same Project?

Jan 1, 2011

I've gone brain dead and can't remember how (where) to declare a variable to be shared by 2 forms (classes) in the same project.

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Script Task: Write 2 Classes And Access Global Variable

Mar 18, 2012

Can i write 2 classes for one Script Task editor in SSIS(2008). I tried to access the global variable like below. I created 2 classes and it doesn't show any compile error, but i couldn't access the global variable in class2 which was assigned as 2 in class, ScriptMain.

[Code]...

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VS 2010 Compiler Creates New Variable Automatically When Use If Statement Without Strictly Declared Variable?

Jan 10, 2011

Say that i have the following code that parse about 20k records from the DB.

Code #1

vb.net While reader.Read()
list.Add(If(Integer.TryParse(reader(0).ToString, 0), Integer.Parse(reader(0).ToString), 0))
End While

And then another code which does the very same thing but it seems to be a little cleaner.

Code #2

vb.net While reader.Read()
Dim storeowner As Integer = 0
Integer.TryParse(reader(0).ToString, storeowner)
list.Add(storeowner)
End While

This is what i am confused about; does the compiler creates a new variable automatically when i use the if statement without strictly declared variable? What approach is better in sense of performance?

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VS 2010 Merging An Integer Variable With A String Variable?

Jun 2, 2011

Say I have something like this

Dim Level1 as Integer = 83
Dim Goal as String
Goal = InputBox(" What level is your goal?")

[code].....

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VS 2010 - Classes Vs Structures?

Dec 11, 2011

For 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.

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VS 2010 How To Organize Classes

Jun 28, 2011

I 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?

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VS 2010 Nested Classes

Oct 16, 2011

I'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).

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Use LINQ To Filter Collection Of Nested Classes To Yield Dictionary Of Unique Properties Of Those Classes?

Jan 23, 2012

I 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.

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VS 2010 Dice Roller Using Classes And OOP?

Nov 16, 2011

For 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.

[Code]...

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VS 2010 Finding Built-In Classes?

Feb 24, 2011

What 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.

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VS 2010 Multiple Classes In Namespace?

Oct 26, 2011

Is 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

[code]....

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VS 2010 Public Variables For All Classes?

Mar 30, 2011

I 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.

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VS 2010 Simple Classes And Delegates?

Dec 5, 2010

I'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.

[Code]...

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VS 2010 - Automatically Adding Namespaces To Classes Within Folders

Jul 26, 2010

Is it possible to have visual studio 2010 automatically add namespaces to classes within folders just like c#?

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VS 2010 Make Classes Import Into Main Form.vb

Mar 20, 2012

I 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.

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Derived Classes Cannot Raise Base Classes

Jul 10, 2009

I m trying to raise Click event of Textbox explictly but I m getting "Derived classes cannot raise base classes" error.[code]....

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VS 2010 Module With Multiple Classes Shows As A Windows Form In Solution Explorer

Mar 29, 2012

I am having this strange thing happen where I have a Module that contains multiple classes in my project. In the Solution Explorer, the module shows up as a Windows Form and if I double click on it to open it, it tries to open the Form Designer. What could be causing VS to think that it is a Windows Form instead of a module?

[Code]...

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VS 2010 Variable Name Within A Variable?

May 18, 2012

If a string variable contains the name of an integer variable how do I then use the contents of the integer variable.i.e.I have a string variable called 'Rowname' which will contain the name of an integer variable.The integer variables will have been previously defined with values such as RowA = 0, RowB = 5, RowC = 10..I now want to add together the contents of the variable defined in 'RowName' with a the contents of an integer variable ColumnNumber.

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Loop And Enumerate Properties Of Nested Classes In Nested Classes?

Sep 24, 2010

so 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?

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VB XML Classes Vs String Classes?

Oct 13, 2011

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.

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VS 2010 Variable Increment On Vb 2010

Jan 17, 2012

i want to create a program that pressing a button will increment an integer variable and a textbox will show the result. Te code i wrote is below:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
dim i as integer
i = i+1
textbox1.text = i
End Sub

now, the same code works for the vb6 form but on vb 2010 the textbox just show 1 and does not increment any further.

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VS 2008 Error: Range Variable 'sender' Hides A Variable In An Enclosing Block Or A Range Variable Previously Defined In The Query Expression

Mar 25, 2010

I am getting the error:"Range variable 'sender' hides a variable in an enclosing block or a range variable previously defined in the query expression."for this

Imports System.Data.SqlClient
Imports System.Linq
Public Class Form1

[code]....

I can select any other item from the table without the error. "sender" has the same properties as "receiver" in the SQL table.

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VS 2010 Use Variable From One Sub In Another?

May 29, 2011

So I have an arraylist with some strings in it in one private sub. But I would like to use this same arraylist in a different private sub also. How could I accomplish this?

I tried changing the subs to public but still got the "is not declared" error. And I tried switching the arraylist's dim with public only to get another error.

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.Net And VS 2010 Append A Variable To An URL?

Apr 16, 2012

I'm a newbie writing my first app. I need help with the following: I need to retrieve the logged in user which = GID, I then need to append it to a URL which will start our Help Desk chat client. I can retrieve the GID easy enough but can't figure out how to append it and pass it with the URL. I found a post which instructed to declare the url as a string also and concatenate it. The UserName would follow the ":" at the end of the Url.

[Code]...

We use javascript to do this from the HelpDesk site, but I need to adapt it to work from my app.

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VB 2010 :: A Variable With A Value Of A Label Name?

Nov 4, 2011

I'm using VB 2010 Express and have a label named "lblTitle" in my form.The next code doesn't work and I know it , but how can I do something like this?

Dim bla As String
bla = "lblTitle"
bla.Text = "Hello world"

[code].....

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