Private Read/Write Access And Public Readonly Access For Variable In Class?
Jan 12, 2012
Is it possible to set a variable in my custom class for Private Read/Write access and Public Readonly access without creating Properties with Get and Set? In other words, from within my class I want full access and from my form I only want read access. Right now I declare my variable as either Private or Public to control Public read/write access. I tried googling my question a bit but I'm not sure what the correct terms even ar
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Jan 9, 2009
Trying to understand the best way to do this and I'm can't get it figured. Here's basically what I have:
Public Class CardParsingClass
Private iAcctIDStart as integer
Private iAcctIDLength as integer
[code]....
I've only included 2 of the class level fields here but there are actually 30, so that's why I was hoping to be able to send the name of the field to set and the value to set it at in the SetValue function. So in some other routine in the program I'd like to be able to issue the following call:
SetValue("iAcctIDStart", "3")
But then when I get into the SetValue routine, I'm not sure how to proceed. I thought about a case statement that would basically be this:
select Case strFieldToSet
case "iAcctIDStart"
iAcctIDStart = cint(strValue)
[code]....
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Feb 23, 2009
Can i have a property that is Readonly for Public but can Read/Write in Private?
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Oct 18, 2011
I have a bunch of private variables I've typed out and I want to put all of my corresponding Public ReadOnly Properties in a bunch below them.Is there some way of copying ten lines of
Private _myVar As String
and pasting in ten sets of
Public Readonly Property MyVar As String
Get
Return _myVar[code]....
I'm currently copying the whole bunch of variable declarations, Find+Replacing Private _ into Public ReadOnly Property then going line-by-line expanding the definitions and writing return statements.how to avoid all this nonsense in the future, as I'm developing on a virtual terminal server, and the input lag on my little copy/paste/type operations on the code is driving me up the wall.
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Feb 10, 2011
I can access a module from code behind but not from the aspx page in inline VB code <% ... %>.
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Jul 25, 2009
How to access a variable that is located in a private sub and then display that variable in another private sub located on the same form.
My actual code is:
Public Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
Dim strFileName As String
strFileName = OpenFD.FileName
OpenFD.InitialDirectory = _
[Code] .....
Obviously, the sub in blue has nothing in it currently and so this is the one I would like to access the variable in. The variable I want to use again is 'FILE_NAME'.
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Sep 27, 2011
I have an API that I created and currently utilize successfully in C#. I am trying to create an example of interacting with the API in VB.NET (so that the QA without C# experience can still utilize it for creating automated tests).
In C# I do the following
[TestingForm(FormName= "Land Lines", CaseType= _caseType
, Application= ApplicationNameCodes.WinRDECode, HasActions= true)]
public class LandLines : RDEMainForm
[Code]....
This gives me a compile time error because it claims that FORM_NAME and CASE_TYPE is not defined, even though the class has it defined inside.
How can I use the defined constants inside the class in the class attributes?
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Nov 29, 2009
I have a public readonly variable in a module, but when I try to set it in my form load event for the first time I get 'ReadOnly' variable cannot be the target of an assignment. It is my understanding that a ReadOnly variable can only be set once and after that you would get an error when setting it.
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Aug 23, 2009
I have a public variable which seems to be going out of scope. I am confused as it has been dimensioned as a public variable: Public xlCell as As Microsoft.Office.Interop.Excel.Range
I originally had all my code in the same module in the same project and it was wrapped within a For/Next Loop (Example 1). I decided to clean up my code and make it more modular (Example 2). All the code is still in the same module in the same project.
Upon doing so, my public variable is not recognized in any of the private subs that I have created. I keep getting the following error: Message="Object reference not set to an instance of an object." When I test the variable using ?IsNothing(xlCell) in the Main Sub I get False in the main sub. this tells me te variable is recognized. However as soon as the Call SelectCaseSub() is triggered, I get a True value for ?IsNothing(xlCell). Why is this? Shouldn't this variable be in scope regardless?
[Code]...
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Feb 24, 2009
How does one implement something as Public ReadOnly Property within a class.
CODE:
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Feb 13, 2009
I have created a class called clsLogIn [code]Now I am on a different form, frmSchedule, and I want to get the ProviderNum property from clsLogin into a text box.
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Mar 20, 2009
I have a class which has various methods that I need to make public to only 1 other class. Is this possible? I don't want to make them public for everybody, just that 1 class.
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Mar 12, 2011
I'm posting this there is a relationship with my previous post [URL]
I have two projects, namely:
1. Project1 (Windows Application)
2. Project2 (Class Library)
in Project2 there are several classes:
* frmLogin.vb
* frmCustomer.vb
* clsGlobals.vb
in my case, I want to frmLogin.vb and frmCustomer.vb not called in Project1 and I can only call is clsGlobals.vb
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Mar 25, 2011
I'm relatively new to .NET and am wondering how people handle naming their private variables and the public properties that access them. Like if you want to be able to just read it, but not write to it.
[Code]...
So far I've taken to putting a 'l' (for local) in front of the all the private variables so as to be able to use the full name for the property. Is there a better way around this, or do you just always have to have different names for private variable/public properties? If so, what sort of conventions do people use?
Its not a huge deal, its just a minor annoyance and I was wondering if I was missing something.
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Feb 16, 2012
what websites, books or courses you guys suggest to use so I learn the fundamentals of programming. What is a class, method, namespace, private vs public. That leads me into .Net programming. A lot of intro to programming use java or C++ as the platform but I want to find one with VB.net or maybe C# if.
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Nov 11, 2009
I have these list of RS-232 strings declared in my public class
Public Class TouchInterface
Dim WatchTVbtnCmd As String = "rs232command1"
Dim VolUpbtnCmd As String = "rs232command2"
Dim VolDownbtnCmd As String = "rs232command3"
Dim SystemOffbtnCmd As String = "rs232command4"
Dim RadiobtnCmd As String = "rs232command5"
Dim MusicbtnCmd As String = "rs232command6"
I then have this private sub. For the sake of this thread, what I would like to do is get the name of the label that was clicked which in the code below is already done, convert it to string (not sure if this needs to be done), this is also done in the code below. Next I want to compare the labelnamestring to all the variables in the public class to find out which one it is equal to and then disply that variable which should be my rs232 string in the message box. I have also added "Cmd" to the variable names above so I also need to work out how to add the text "Cmd" to the string to properly compare.
Private Sub Musicbtn_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles WatchTvbtn.Click, VolUpbtn.Click, VolDownbtn.Click, SystemOffbtn.Click, Radiobtn.Click, Musicbtn.Click, GardenVolUpbtn.Click, GardenVolDownbtn.Click, GardenRadiobtn.Click, GardenOffbtn.Click, GardenMusicbtn.Click, GardenMediaCenterbtn.Click
Dim labelname As Label = DirectCast(sender, Label)
[Code] .....
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May 15, 2009
I can't make difference between public class and private class and friend and protected friend class.
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Mar 4, 2012
I want to do this: [URL] but in VB. I believe that is for C# I have 2 classes.
[Code]....
I know I've been asking too many questions lately and I do apologise for that. I am trying to learn the basics
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Dec 1, 2011
how to access the variable from another [Code] I need to call the variable invoiceno in the class xmlserializer using ord1 and assign the value which the user enters during the runtime.
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Jan 30, 2010
I'm trying to get my application to read to and write from an Access database. I am running Windows 7 x64.
If I disable UAC, I don't the error. If I have UAC enabled, then the error occurs. Here is a screen shot of the error:
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Mar 12, 2010
So I have a database in Microsoft Access (its path is c:database.mdb). There are two tables. Table1 and Table2. I would like to read each row of Table1 to an array, and write a row to Table2.
I have looked all over google, but I couldn't find anything that worked.
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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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May 1, 2011
I've looked for code on this, and it seems needlessly confusing to me. I've tried some code I found and it doesn't return the proper value (I can't find the link to it now). So, I'm attempting to avoid that which I do not understand by writing a function that creates then deletes a file:
Friend Function GetFolderAccess(ByVal sDirectory As String) As Boolean
Try
Dim fs As New FileStream(sDirectory & " estfile.test", FileMode.OpenOrCreate, FileAccess.ReadWrite)
Dim s As New StreamWriter(fs)
[code]....
Through testing, this appears to work for both read and write access. I originally had a File.Exists before the File.Delete, but the function would sometimes return True when it should have returned False.
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Aug 4, 2010
I am creating a file and then trying to read and write to it. I'm coming up with an UnauthorizedAccessException wa unhandled. My question is, How do I get around this properly or otherwise improperly to read and write to my text file?
Imports Scripting
Imports System.IO
Imports System.Security
Imports System.Security.Permissions
Public Class Form1
[Code] .....
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Nov 8, 2009
I am just trying to get to grips with the setup tool in visual studio and seem to be making progress but im falling over with access permissions.My projects includes an mdf table and when i install my project the folder and db file is always set to read only and the application cannot write to it.How can i change or set the permission when the application is installed?
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Nov 7, 2009
I've been scrambling my brain to figure out how to access my FTP server thing to get a list of text files in a folder and to edit the contents of those files online.
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Sep 10, 2009
i have an abstract super class and a sublcass.I don't want any access to the superclasses class variable.Access should only be through the subclass method [code] ' now i just want the GetFoo method exposed however all i get is ' direct access to the Foo string.' I made it Friend so that only the derived class SubClass can see it ' but my main program can see it as well//How can i set this up so that the only call availabe would be
x.GetFoo()What have i got wrong ?
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Mar 23, 2009
If I have the following class and declaration:
Public Class objLocation
Public SysLocationId As String
Public NameFull As String
Public LatRaw As String
Public LongRaw As String
Public Active As Integer
End Class
dim lLocation as new objLocation
I can access each variable thus lLocation.SysLocationId, etc. Is there an alternate way, so I can access each variable by index, so something like lLocation(0), lLocation(1), etc., which gives me the flexibility to compare to classes of the same type via a for next loop, or against other sources, like a datatable.
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May 24, 2009
I want to access (read/write) the user entered text for a document.The document text is housed inside a CONTENTEDITABLE DIV tag within a html document.The html document is loaded into the webbrowser object (webbrowser.navigate(path and filename)).When the html document (bulletin.htm) loads,An error is popped up such as ACCESS DENIED to toolbar.htc and menu.htc And the toolbar and menubar are missing or corrupted.I have tried to generate the code for the document using the code below.
Function ScriptEditorHeader() As String
Dim sBuf As String = Nothing
sBuf = ""
sBuf = sBuf & "<html "
[code]....
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Apr 6, 2008
I am looking for sample code that will allow me to read, write and edit records to a local MS Access DB using VB9.For my project, the datagrid and other controls are not an option.I have looked everywhere and cannot find any code examples.I assume it should be straight forward, but with all the changes in VB9 its tough.
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