Close() Puts Forms Into Crazy Open/Close Loop?

Mar 4, 2011

In a program I'm working on, I want a "Loading..." dialog to close when it can't log in to a site using the username and password provided by the user. Basically, I have the code set up right because the function it is supposed to carry out when that occurs does work, but for some reason it ends up in some really weird stuff happening. In the Loading form, I have it set to do "Form1.Show()" and then "Me.Close()", assuming it would simply show the login form and then close the Loading form. However, when this happens, the Loading form closes, and then for only an instant Form1 shows, and then the Loading form shows and Form1 closes. This happens forever until I stop the debugging, and I can't seem to figure out why. Am I using the wrong method? What exactly does Me.Close() do anyways? All I want to do is close the form and open another

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Script To Open And Close Cd Drive In A Loop?

Mar 18, 2011

i am in need a script to open and close cd drive in a loop i already got this :

[code]...

But i need to start it with a button in visual basic 2008

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Aug 30, 2009

my web browser is my main form and it has a number of sub forms , how can i set it that when i close the main form my sub forms dont close ?

At the moment when i close the main form all the forms close

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May 20, 2012

I want to close form and open another one without termination of the application, when I try to open second form and close first one the application terminate.[code]...

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Apr 24, 2009

I have an application that has multiple forms. The "main" form within this application can be accessed from other forms. However, each time this "main" form is accessed throughout the application, a "new" instance is created, resulting in multiple instances of this form being open.

I would like to have "only" one instance of this form open at one time. If it is currently opened, I would like it to be brought to the forefront, instead of opening a new instance.

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Forms :: When Me.close() Doesn't Close Form

Mar 2, 2009

I have a situation where me.close() doesn't close the form. I have a form with a button with the code seen below. What happens when the button is clicked is the new form shows, but the original form(calling form) is still there. When I go into debug mode, I can see the me.close() execute, but nothing happens (calling form stays open). When I close the second form both forms close. If I comment out the call for the second form to open the first form closes without problem.

Private Sub cmdNext_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdNext.Click
Dim f As New frmOrder3

[Code].....

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Apr 24, 2010

I'm developing software using vb.net. I want to do following things in my application.

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Jan 16, 2009

I'm currently in the process of building a text editor type program, and have run into a brick wall. I haven't done VB in years, so I may just need a little reminder on some things. I have coded everything so far as far as opening files, saving them, changing fonts, colors, etc. However, I'm looking to add a Close button to my menu strip that will just close the currently opened file, and not the entire program, while also ask the user if he/she would like to save before closing the file, and then if they select yes, it will show the save dialog, and if not, it will go ahead and close the currently opened item.

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Forms :: Multiple Forms Open And Close

Apr 16, 2009

I have two forms frmMain and frmNew, and one module modMain. In modMain I hold public variables which are needed for application. My question is how to open and close those two forms when needed? I ask this because if i set frmMain as startup form, then when closed, application will end, and one of those two forms will always be displayed. Also if I set frmNew as startup form, then when I close this form, application will also end. Is there a way to do this from module or something so my application won't end after closing and opening any of those two forms?

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Forms :: First Form Close And Second Form Open?

Feb 21, 2009

how can i do that? first form close and second open........i did that but first is only hiding not close

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[2008] Notify Icon When The User Clicks The Close Button That It Doesn't Close The Form?

Jan 17, 2009

I have set up a notify icon for my form. I want to make it so that when the user clicks the close button that it doesn't close the form it just takes it to shows the notify icon. They can exit the program from the notify icon. Can someone tell me how to keep it running?

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Click My Close Button The Application Will Close But The Debugger Is Still In Active?

Nov 29, 2009

It seems like whenever i click my close button the application will close but the debugger is still in active.How to exit this debugger? :)

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.NET End Vs Form.Close() Vs Application.Exit Cleaner Way To Close One's App?

Feb 12, 2011

sometimes, when I use Form.close() when debugging my program, although the form is closed, the application is still running. I noticed this behaviour when using the msgbox function.

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Close Windows Calculator In .net 2008 When Application Close?

Aug 30, 2009

how to use windows calculator in vb.net 2008? 

 use System.Diagnostic.Process.Start(calc)

its working but i want when application close it also close this calculator how?

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VS 2008 Open And Close Connection Every Second, Or Keep It Open All The Time??

Oct 21, 2009

In my program, I have a timer with a inteval set to 1000ms. The timer is executing a MySQL-command, and right now I'm opening and closing the connection each time.

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Get The Inputbox To Close Without It Conflicting With The Loop?

Jun 22, 2010

I was looking though a book on Visual Basic .Net and came across a little password-protection program (A very simple one).

Problem is, that this was written for VB6, not the 2008 version, so i did a little editing as shown below:
'Start by declaring variables
Dim Password As String

[code]....

The only thing i am having difficulty is with the line at the end. Even though it has been told it needs to close if more than three attempts are made, it keeps trying to create a fourth attempt and is fighting against the If statement.How do i get the inputbox to close without it conflicting with the loop? I thought maybe an End If statement at the end would help, but it doesn't.

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Loop To Close Multiple Objects?

Oct 5, 2010

I'm using VB.net from the Visual Studio 2008. I have a large number of PictureBoxs in a form. They have been created sequentially, Pic1, Pic2, Pic3, ... Depending on how I access this form, I want to turn off a number of them. I'm working with the code below.I can put the name of the object into a variable, Pic, but am still unable to hide the object names in that variable, Pic.Hide().

Dim StartNumber As UShort = 1
Dim StopNumber As UShort = 33
Dim Number As Object = 1

[code].....

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Close File And Exit Fron Read Loop

Feb 4, 2011

i have this code

[Code]...

I want If A.Text = (detline(0)) the program show a msgbox (OK this) and after the msgbox to cl;ose the file and exit from soubroutine When the pointer reach the FileClose(ReadFile) i receive in Catch When an Err.Number 13 WHY??

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Aug 17, 2009

can't close open image

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Jun 3, 2010

I would like to close my appliaction and then open it based on a condition.Lets say I have a Lab1.EXE file, I want to close if the flag = True and then reopen it. 

If ClFlag = True then
Application.Exit
---Then
RUN LAB1.EXE
Endif

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Oct 3, 2009

I never had problems with this before but now this ain't working right. What I want to do is open a new Form and close the Current Form that is already open. This code use to work for me

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Close One Form And Open Another?

Jun 30, 2010

When I open my application I have the first form which opens as the Register form. When I press the Activate Button I want the MAIN form to open and I am using the code below as the last two line[code]...

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Sep 3, 2009

I'm developing a WinForms app in VB.NET, that handles sets of style data, and when the user clicks on another set's label, it prompts through a dialog "You are leaving this style preset to edit another one. keep changes on this one? [Yes] [No]".But, I'm facing the problem that, when the user clicks either option, and the dialog closes, everything has to be refreshed, and loading the form again seems a good option.[code]But as soon as that sub is called from the prompt, it crashes the application. (doesn't show an error in debug, simply crashes) How should I, from a given dialog, close the dialog, it's parent, and re-open it's parent? (which triggers all the Dialog_Load() code of the parent)

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Open / Close BAT Or CMD File?

Oct 9, 2010

Any code I could get that would Open + Close a .bat or .cmd file? Not ALL .bat / .cmd files that are open, but just ONE (runserver.bat / runserver.cmd).

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Jan 5, 2010

i want to open and close com ports in vb.net and send data through ports.

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Jun 4, 2010

Is it possible to issue a Open CD and a Close CD using VB.net? Are there any examples of code I could see or articles? Thanks for you help, in what seems to be such a trivial matter. (I know though that the simpler the function the more code seems to be

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Sep 26, 2009

i have just started to use this program...i accidently opened more than 1 program and i cant close them.

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VS 2010 Unexpected Error On Program Close With A Wait Loop?

Dec 1, 2011

In my MDI Application code I have a form that launches a second form then hides itself until the spawned form closes. It works great unless I choose to close the application while the spawned form is still up.

The following is some example code.

Dim ChildForm as New frmTaskWindow With { .MDIParent = Me, .AddingNew = True }
ChildForm.Show
Me.Hide()

[Code].....

Me.Show() ' error occurs here because my form is already closed by the system. Is there a way to get around this without just an error catcher?

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Close Open Text File?

Mar 20, 2012

In this project I want to read text from the text file.. after that want to update the text file.. if i just run the code manually, the code run well.. but if I want use timer to keep the code run automatically there show problem.

here my code

Imports System.IO
Public Class Form1
Dim skrng As Date = Date.Now()

[code]....

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DB/Reporting :: SQL Connection Open/close?

Dec 16, 2011

SQL connections confuse me sometimes In almost every SQL related code on the internet the routine is like this;

* Open connection
* Execute SQL command
* Close connection

Is it good practice to just open a connection when the application starts and use that connection until the application closes?I know that sequential connections are required when processing more queries, but what if I need to poll a certain Table every x seconds? Isn't is better to keep that single connection open for as long as the application is running (and re-open when a failure occurs) instead of opening a new connection every x seconds?

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Jul 7, 2011

I am making a VB .NET application using Visual Studio 2010. I want to know how to open/close ports of the computer. The application will be running in Windows XP only.Actually the thing I want is to close all ports but 80 but also have the ability to open a few more if I need them. Any ideas?

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Jul 6, 2010

Are there code can open and close forms in particular Time (reference is computer clock)..?
Example: in 08:00:00 open form1 and in 08:45:00 close it
And can I let the user enter the time to open and close the forms in the Basic Form?

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Invisibly Open A Url & Automatically Close It?

Oct 22, 2009

I wanted to open a URL from my VB.net Application on a button click event (for sending SMS from my application). However, I don't want my users to know about it & I don't want to have a browser pop up and execute the URL.

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Invisibly Open Url & Automatically Close It?

Oct 22, 2009

I wanted to open a URL from my VB.net Application on a button click event (for sending SMS from my application). However, I don't want my users to know about it & I don't want to have a browser pop up and execute the URL.

Is it possible to do it invisibly? And once it is done, is it possible to close the invisible browser window too?

[URL]

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MAYDAY - Close An Already Open File?

Jun 9, 2011

I am having issues with people not closing an important file in excel.I have a new vb.net based application that i want to close the excel file when i prompt it to. The application checks for specific named files in a hidden folder on a timer event, (that all works fine) how do i tell it to close a file that is already open.All threads i have read say things like this:

Dim XLApp As New Application
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Dim Sheet As Worksheet = CType(WkBook.Sheets(1), Worksheet)

[code]....

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Sep 16, 2010

I am trying to give some user entertainment, and show a "please wait" window, with Marquee, during the loading of a separate complex Window. I am attempting to do this by loading the Window in a new thread, like this:

Public Function ShowPleaseWait() As System.Threading.Thread
Dim PleaseWait As New System.Threading.Thread(AddressOf LoadPleaseWait)
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[code]....

In the calling code, it calls ShowPleaseWait and saves the Thread for later.. To close the window, it calls Thread.Abort, on the saved thread. This in turn will causes it to enter the Catch. I have tried, many different ways, with and without the catch.This works incredibly, the first time it is called. However, additional calls will fail at window.Show() with the exception: The calling thread cannot access this object because a different thread owns it..This really puzzles me as the window was created one line above the call to window.Show and is local. How is it owned by a different thread? How can I fix this?

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Jun 20, 2010

My cousin and I were discussing the difference between Java and VB.Net and I thought I would make a simple application to show him.

My form has two labels a numerical up and down component and a button.

I want to set it so when my cousin presses the button it will open and close his disk tray for the amount of time he chose using the numerical up and down.

I have tried making the program using a sample I have acquired but ti keeps throwing this error.

This is the error.

PInvokeStackImbalance was detected

Message: A call to PInvoke function 'WindowsApplication1!WindowsApplication1.Form1::mciSendString' has unbalanced the stack. This is likely because the managed PInvoke signature does not match the unmanaged target signature. Check that the calling convention
and parameters of the PInvoke signature match the target unmanaged signature.

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May 30, 2009

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May 29, 2011

i am developing client-server app. i want to hide the opened form and open the another form when i recive the commnd from server. the client side has two form and one class.code(this code execute when i recive the msg):

Sub messagerecieved(ByVal message As String)
Dim msg() As String = message.Split("|") ' if a message is recieved, split it to process it
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[code]....

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Nov 30, 2011

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Jan 2, 2010

I know it's asimple code but i cant remember. i want when my program closed then website open for the user for a site

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May 17, 2009

I'm trying to make a splash screen that closes and loads the main form. I know this is very simple but for some reason I can't get it to work.

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Dec 21, 2010

i've tried

On Form1
form2.show
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[code].....

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Apr 24, 2009

I've been looking for ways to convert a pdf to an image so i can display a preview of the file in my application. I google and find a bunch of api's you have to pay for, but I would like to know how to actually do this myself...

[Code]...

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