Scope - VB Equivalent Of {} Nesting
Feb 27, 2009Does VB.NET have any scope nesting operators like {} in C type languages? Example C++ type code:
int i;
i = 0;
{
int i;
i++;
}
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Php - C# Or .NET Equivalent To Scope Resolution Operator?
Nov 22, 2011I am porting php code to vbnet (i'm a little better at vbnet than c#). In the php is the scope resolution operator.
Here's the bit:
$args = phpZenfolio::processArgs( func_get_args() );
Equivalent in c#/vbnet?The whole function is the following which i gues is equivalent to the sub new in vbnet.
public function __construct()
{
$args = phpZenfolio::processArgs( func_get_args() );
$this->APIVer = ( array_key_exists( 'APIVer', $args ) ) ? $args['APIVer'] : '1.4';
[code]....
.net-checking For Nesting Of Comments?
Jun 7, 2011i am writing a program which takes a c program as input and it has to check whether there is a nesting of comments in that c program and gives an output based on that,how do i go about that
View 1 RepliesNesting Objects And Where To Retrieve Data?
Dec 6, 2009I am trying to re-write an existing system with objects. I have created a few basic objects but am stuck on exactly how to get them to work how I want.These are the basic classes:
Public Class Course
Public AcadPeriod As String
Public AoSCode As String
[code]......
VS 2008 Difference Between Nesting 'If' In 'Else' & Using 'ElseIf'?
Jul 15, 2011What is the difference between nesting an 'If' statement in and 'Else' statement and using an 'ElseIf' statement? In the example below, the controls labeled [nAMEoFdAY]Limit are instances of the NumericUpDown object, each representing a day of the week. I need the application to decide which NumericUpDown to draw the value from based on the current day of the week. Will this code work or should I use the 'ElseIf' statement, and if so, how?
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Define The Nesting Structure - Modify The Program ?
Apr 18, 2010CODE:
When the program runs out to the red code, it clewed error, the error screenshot shown as Figure 1.
I want to ask the wrong place, and how to modify the program.
Ado.net - .NET: Nesting "Using" For Database Access?
May 23, 2012I'm wondering if this is a good way of doing data access, in terms of all the database objects being properly closed and disposed? For example:
Using conn As New SqlConnection(MyConnectionString)
Using cmd As New SqlCommand("some SQL here", conn)
... add parameters ...
conn.Open()
[code]....
Is nesting Using like acceptable practice? If I exit the method at some point within the Read() loop, will the use of Using like this ensure all objects are cleaned up properly regardless?
VS 2008 Nesting A Datatable Inside A Datatable?
Mar 16, 2011Is there a way to nest a datatable into another datatable? I know you can do this with gridviews but thats not what I'm looking for.
Also, I don't want to merge the datatables. What I'm trying to do is have a datatable with 2 columns and each column containing different datatables.
Javascript Scope With Asp.net?
Jul 2, 2009I'm probably missing out on something fundamental here but it seems rather tricky and confusing to me so here goes.to demonstrate the issue I have the following example .aspx page
<%@ Page Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
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Asp.net - For Each Looping Getting Out Of Scope Exception MVC?
Jun 18, 2012Am looping a list object. The list contain 18 object. The loop running 18 times but the end of the 18th one getting Object reference not set to an instance of an object..
@For Each Slogs As SFAMobile.MobileServices.CustomerDetail In Model.Customers
@<option value='@Slogs.CustomerId' @selectedVal >@Slogs.Name ( @Slogs.CustomerId ) </option>
Next
Keeping An Item In Scope?
Aug 31, 2010I have been working on a VB app to edit an excel document. I want to keep my excel workbook in scope for the whole app.
For example here is how my program looks now
private sub
open workbook
end sub
private sub
reference workbook
end sub
I want a way to just call my workbook at the top and have all of my subs recognize it. I guess like a global variable or something.
[URL]
Variable Scope Error/
Dec 16, 2011ok I have two procedures:This is for the tick of a timer
Private Sub Timer1_Tick(sender As System.Object, e As System.EventArgs) Handles Timer1.Tick
intTickCounter = intTickCounter + 1
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Variable Scope Outside A Class?
Jun 12, 2011how to declare scope for variables outside their class?
Here's what i have in a class known Create_User:
Public Class Create_User
Public conn As New SqlConnection(My.Settings.HotelConnectionString)
Public usercmd As SqlCommand
[Code]....
How can i increase the scope of these variables to be used in another class? I dont want to keep declaring them again and again.
VS 2005 Scope Of Using Block
Aug 17, 2010[code]In the above code what will be state of 'conn' variable and the 'cmd' variable and the State of the Connection to the DB in the following two case
i. Me.Close line
2. If any error occurs
Event Variable Scope Across Whole Project
Jun 7, 2011I'm moving from VB6 to VB.net and there are a few things confusing. In vb.net, your program just automatically has a form, now the form in in a class and so it may or may not be there. In vb6, the main subroutine controls program flow and I don't see that in vb.net. However, my biggest problem is that I have a com dll that has a connect class with events. I need to be able to access these variable outside of that class. I don't understand how to do that. I can't seem to declare public withevents outside of the class and in the namespace so it can be shared with other code. Its say "not valid" in Namespace.
So what is the best way to do that. Do I create a set/get property for the class that holds this value? And, if I do that, is the connect class automatically instantiated as a part of the COM dll? Right now I don't instantiate the connect class, I assume the application does. But I'm not sure exactly how the property of the class would be set...perhaps I would need to call the property set from the on-connection method. Anybody know what the answer to these two questions are and this 3rd one? How can I have a variable that has "events" have scope across the entire project?
How Does Block Level Scope Work With Dim As New
Jan 21, 2010While DataReader.Read
Dim Foo as New FooBar
Foo.Property = "Test"
Loop
In VB.net, does this create a new Foo instance every for every loop? Or just one Foo instance with block level scope? Do all blocks (If..EndIf, For..Next) work the same in this regard?
Let Users Set Application Scope Settings?
Mar 19, 2012I am writing an App that automates file uploads from users desktops to a specified file server. On the first run of the app, I need the user to select a file server and save it for all other users of that PC. I thought I could do this
with application settings but it appears it is not suitable for this purpose. I need suggestions on how I can make this work.
I thought about a registry setting but the user may not have permission to edit the registry based on group policy/security settings.
I also thought about creating an XML file with the file server name that I can read from the installed project directory, but I was hoping there was a more streamlined way.
Narrowing The Scope Of Sub In Inherited Class?
Apr 5, 2011Below is example code of what I want to do:
Public Class Test
Sub New()
Dim cool As New B
cool.Doit()
[code]....
Public Function With Form Scope?
May 17, 2012I have a Function for checking the input in a textbox and only allowing Numeric & Backspace; everything works fine so far. My form is for financials and it has about 20 textboxes; they all receive Numeric only data; there is NO alpha data on the entire form required. Note in the snippet below that I don't even need a decimal point as well.
Is there a way to handle ALL textboxes on this form without having to place the Function call in each textbox KeyPress event. took a long (5 year) hiatus from developing VB6
Public Function TrapKey(ByVal KCode As String) As Boolean
If (KCode >= 48 And KCode <= 57) Or KCode = 8 Then
TrapKey = False
[Code].....
Public Variable Goe Out Of Scope In Private Sub?
Aug 23, 2009I 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?
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Safe To Use An App-scope Regex Object?
Nov 28, 2011I have a complex Regex which is used to help strip out HTML from user input. I'm aware that .NET caches static Regex calls to some extent, but this one is big and used frequently, so I'd like it to hang around.[code]...
View 1 RepliesScope Of .NET's List(Of T).Reverse Method
Apr 7, 2009I've got a simple function that takes a List parameter. While working with it, it copies it and reverses the copy using .NET's List(Of T).Reverse method.
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Scope: Access A Collection In Another Form?
Nov 10, 2009I am trying to acccess a Collection in another form
vb
MsgBox(frmNetworkTest.servers.Count)
What I do this from the same form, I get 16, but when I run this code from a different form, I get 0.The variable is declared public.
vb
Public servers As New System.Collections.ArrayList()
Variable Scope And Event Timer
Mar 15, 2011I'm trying to create a simple media player that will scan a directory for certain filetypes, add them to a playlist then play a random playlist entry - changing every x seconds.I figured this would be simple in VB and, to an extent it was. I have the code running that chooses the directory and plays the random file.I just need to now make this repeat every 30 seconds or so.I have all the coded attached under the sub for the 'open' function of the player so it's quite flat. I think I need to use a timer here, to trigger the routine to pick and play the media every 30 seconds?In doing this I think I need to break the variables out of the function I currently have as they need to be shared between the timer loop function and the central 'creating file list' function.
I'm having trouble - I'm no coder (as you'll tell!) and although getting this far was easy I'm now (I think) bumping into threading / variable scope issues which are a bit of a brick wall.I've tried making the variables public / global by declaring in the class rather than the sub but I get errors at runtime. Presumably because of how I'm creating the windows media objects? [code]
Variable Scope When Using Forms VB2008?
Mar 11, 2010where I should declare my variable when using forms and the scope in my test code.
In my code below I have declared variable x in my form1 which can be printed in form2.
But when I create a structure in form1, initialize an array of the type protorec and try to assign values to cards(1).firstname etc... I get a "declartion expected" error.
Why does it work for x but not for cards(x) my array of records?
Public
Class Form1
Public Structure protorec
[Code]....
VB 6 - Duplicate Declaration In Current Scope?
Jul 7, 2009I am attempting to dynamically dim a variable (i.e. create instance based on user selection).
For example, based on the users selection from a combo box containing report names ("Report A", "Report B", "Report C", etc.), I would like to Dim a report variable (MyReport).
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VS 2005 Error Handling Scope?
Mar 10, 2011plain how error handling scope works. What I mean by that is if I have a sub called ImportData and in there I have a for loop to go through a list of files and in the for loop I call another sub routine called CheckData. All have catch error in. If a sub has a catch error in where does it go from its call.
Private Sub ImportData
Dim iLoop as Int16
Try
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.net - Public Enum With One Item In A Different Scope (Like Friend)
Nov 18, 2011Is there a way to do something like this?
Public Enum CarMakes
Honda
BMW
Mazda
Friend Yugo
End Enum
I need to expose the the Enum to Public except for one of the items I just want to be available from inside the assembly.
C# - When Variables Defined In The Inner Scope May Be Garbage Collected?
Sep 28, 2009If I want to narrow scope of a variable in C#, I can introduce additional braces - i.e.:
class Program
{
static void Main(string[] args)[code].....
In the ide, I can no longer reference y outside of the scope introduced by the new braces. I would have thought that this would mean that the variable y would be available for garbage collection.(it is interesting to note that when viewing the compiled code using reflector it appears that there is no difference with or without the additional braces)Is there any way similar to this to narrow scope when using VB.net? Does this have any impact on when variables defined in the inner scope may be garbage collected?
Call New Class With Global Scope From Function?
Dec 4, 2011I want to create a new instance of a class when I click on a button, but I need to interact with members of that class using other controls on the form, so I need the class to have a global scope. I know I could call the new class in formload, but the class creates certain variables that need to be current. If it is done on formload, the variables wouldn't be current, because if the class is created at formload, it would have different info at that time. Surely, there must be a way to create an instance of the myClass from within a sub that is accessible from other subs of the same class.
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