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.
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?
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
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]...
How to comment and uncomment codes at multiple place within my project at the same time?I am using VS 2010 trial version to develop a VB application.Some of functions only should be showed to developer, not to users. So I must comment them and uncomment them many times during the process of development. please note that those codes are located in many locations and many VB files within my project.
Can I do this in a conveninent way, just clicking a button, or just defining a const or "#define something", something like that?
i was doing a fair amount of programming many years ago, like 10 it feels like, so I'm sorely not up to date on how my newly downloaded Visual Basic Express expects me to communicate with it.I am writing a program that pulls a cell from a database after the user has gone through several forms to determine which cells they want. When I write it like that, it doesn't sound very efficient, but I've designed it this way for usability.Here's where I have a problem: Should I store the path the user takes in a string, an array, what?
Here's an example:Someone wants baseball stats and trivia. They run my program, main form pops up, they select National League button, the NL Form pops up. Now the way my program is set up right now, is there are two ListBoxes on the form, one is populated, and as the user selects a Team from ListBox1, it jumps to ListBox2. Once they've selected all the teams they want info for, they click a button Next.
What I now need the program to do is show the next form "Team: name" once for each team, and insert the name of the team on the form in the appropriate label which I'll have blank. This form will also do the Listbox thing except the first listbox will populated with Topics like HR Stats, Pitching Stats, Coach History, etc.
I need to open a form 6 times, I have the following
[Code]...
But when I click the button 6 times all the 6 forms open, but when I close one and click in the button to open again (since I only have 5 opened) the compiler says that I need to sure that the object isn't in use before using it again.
I am currently making a game with multiple levels when you complete one level the form hides and shows the form for the next level. But the keydown event doesnt work on the second level. How can I make it work?
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
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.
I have a main form, and some sub forms, and each sub form can have some sub forms. When I have multiple sub forms open, and I try to get data from the parent form, it returns the data from the wrong parent form.For example I have two instances of Mainform.subform running. If I do something like this in a child form of one instance of the subform. It returns data from the other subform.
dim l = Mainform.subform.listofdata
Edit:I am using visual Studio 2008. Winforms, form designed using designer. In my mainform I am doing this
Protected Friend frmMain as Mainform frmmain = new mainform
In frmMain I am doing this
Protected Friend frmsub as new Subform' frmsub = new subform
i have a problem with trying to get 2 forms to close at different times using a timer on each of the 2 forms.
This is my form layout:
Quote: frmMain Frm1 Frm2
Frm1 and Frm2 are identical to each other. FrmMain has 2 buttons on it. One button to call Frm1 and the other to call Frm2.Frm1 and Frm2 each has a timer. It counts down to 0 and then does a .close(). However, if i pause between clicking the second button they both seem to always disappears at the same time.I would do something like this...
Click on the first button (showing the Frm1 form)
wait about 10 secs...Click on the second button (showing the Frm2 form)they both are shown on screen...hen they both disappear at the same time.... which shouldn't happen since i clicked the Frm2 box 10 seconds AFTER Frm1... So Frm1 should hide before Frm2 does...but it does not.
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
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
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]...
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)
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).
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
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()
