Vb net close form

You cannot call this method from the Activated event when WindowState is set to Maximized. When a form is closed, all resources created within the object are closed and the form is disposed. You can prevent the closing of a form at run time by handling the Closing event and setting the Cancel property of the CancelEventArgs passed as a parameter to your event handler. If the form you are closing is the startup form of your application, your application ends. The two conditions when a form is not disposed on Close is when 1 it is part of a multiple-document interface MDI application, and the form is not visible; and 2 you have displayed the form using ShowDialog.

In these cases, you will need to call Dispose manually to mark all of the form's controls for garbage collection. When the Close method is called on a Form displayed as a modeless window, you cannot call the Show method to make the form visible, because the form's resources have already been released.

To hide a form and then make it visible, use the Control. Hide method. Prior to the. NET Framework 2. Closed and Form. Closing events are not raised when the Application. Exit method is called to exit your application.

If you have validation code in either of these events that must be executed, you should call the Form. Close method for each open form individually before calling the Exit method.

Skip to main content. Exit focus mode. Close Method Definition Namespace: System. Forms Assembly: System. Closes the form. Note When the Close method is called on a Form displayed as a modeless window, you cannot call the Show method to make the form visible, because the form's resources have already been released.

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I'm venturing into making my VB. NET application a little better to use by making some of the forms modeless. I think I've figured out how to use dlg. Show and dlg. Hide instead of calling dlg. I have an instance of my modeless dialog in my main application form:. The "X" button in the upper right is getting me, though. When I close the form with that button, then try to reopen the form, I get. This is the proper way to do what you are trying to achieve though.

I also have a form flag bterminate to force the cancel where i want it to and therefore not ask the question.

Thanks your suggestion helped me as well :. John was Hiding the form in his code and the answers above provide a solution to that case. Often, though, you are not planning to use the form again, so you really do want the form to be Disposed. Note the use of the Me. Dispose instead of any existing Me. If you leave the Me. Close you'll create an infinite loop. See this for the subtle differences between Close and Dispose.

Agree with handling the FormClosing event. Or change the properties on the form to hide the system X control. I've tried everything and it didn't work if you just want to close, without showing an messagebox, you will just need:. Learn more. Ask Question. Asked 9 years, 11 months ago. Active 1 year, 10 months ago. Viewed 62k times. Object, ByVal e As System.

Click Me. OK Me. Cancel Me.Having multiple forms as part of your Visual Basic. NET program may be nice, but when your Visual Basic. NET program runs, it normally displays one form. Before you can open or close a form, you need to know the specific name of the form you want to open or close. The Solution Explorer window lists the names of all the forms that make up your Visual Basic.

NET program, such as a form named frmMain. After you know the name of the form that you want to display, you need to use BASIC command to open the form, such as the following:.

The first line tells Visual Basic. The oForm name is arbitrary and can be any name you choose. The second line tells Visual Basic. NET to get ready to create an object to represent your form while the second line actually creates that object to represent your form.

The third line tells Visual Basic. The fourth line tells Visual Basic. To clear a form out of memory, you need to use the Close command, such as:. To make your program end, you have to shut down all your forms. This command just tells Visual Basic. Related Book VisualBasic. NET For Dummies.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here.

Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. But everytime i switch forms the form load event will only trigger once. Is there something wrong with my code? I am guesing the Me.

Hide will only hide the previous form and not totally close it. I want to be able to close the previous form so that when i will open it again, the form load event will trigger again. This is exactly what is happening. The Hide method just hides the form from the user, effectively making it invisible.

What you're looking for is the Close methodwhich actually closes the form. Since you are displaying the form using the Show method, you do not need to call Dispose. You will, however, not be able to close a form and continue to run code in its methods. So you'll need to reverse the order of the statements in your event handler functions, displaying the other form first and then closing itself. Make them look like this:. That will do what you want.

vb net close form

The Load event will be triggered each time you call the Show method, because you're creating and showing a new form. It is worth pointing out, though, that you're relying on an unusual characteristic of VB. NET, one that it retains from the older VB languages for backwards compatibility reasons.

Instead of referring to an object of your form class like you would have to do with all other class objectsyou are referring to it by the type name the name of the class itself. You really shouldn't do that, it causes all sorts of headaches and will confuse people reading your code.

It is better to just instantiate a new form object, like this:. When you run this code, you will likely run immediately into another problem: the first time you close Form1your entire application will quit. This is because, by default for a new project, Form1 is designated as the "Startup form" in your project's properties "My Project" in the Solution Explorer.

You will either have to:. Yes, it does what it says. If you want to close the form then use Me. Close instead. The Load event will fire again when you create the new instance. You'll have to change a setting to ensure that doesn't also close your application. And put the Me. Close call after the Show call. I also had a similar question. When u. Hide you are just storing it away in memory somewhere such that when it is re-opened it doesnt have to make a new form just recalls the one from memory hence that method is not called again.

You have to destroy the form. So what you can do when navigating to another form is go to that form first and then destroy the current form like so Form2. Show Me. Look at my question and my accepted answer.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Opening, Closing, and Hiding Forms with Visual Basic .NET

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. An unhandled exception of type 'System. InvalidOperationException' occurred in mscorlib. I believe this is because I close the form executing the code before the loop can go to the next form.

If this is the case, how can I make it so my loop finishes once the last form is closed? Can I even do that? Learn more. Trying to close all opened forms in visual basic Ask Question. Asked 4 years, 2 months ago. Active 2 years, 10 months ago. Viewed 13k times. I want it so when my button is clicked, I exit my application. OpenForms Form.

Opening, Closing, and Hiding Forms with Visual Basic .NET

Close Next End Sub But after closing all forms besides the form with this button on it, I get this error: An unhandled exception of type 'System. Reza Aghaei Klink45 Klink45 1 1 gold badge 2 2 silver badges 19 19 bronze badges. Do you want to exit the application or you want close all forms except the current form? Is this what you need? Active Oldest Votes. Close all but current form: My. ForEach Sub form form.

Close Close application normally: Application. Exit Force application to exit: Environment. Exit 1. Reza Aghaei Reza Aghaei Can you explain the reason behind Environment. Exit 1? As my understanding that is used for console based applicationsBy using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

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vb net close form

Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. This code runs after the form has been closed, when it's being disposed. Depending on how you're showing the form, it might not get disposed at all. You need to handle the FormClosing event and set e. Cancel to True if you want to cancel the close. Use FormClosing event. This code may not be 'efficient' but allows the user to save their work before closing, close the form if they press 'No' or return back to the form without closing if they press 'Cancel'.

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Close all active forms in Parent Form in VB net

How to handle a form close event in vb. Asked 8 years, 11 months ago. Active 5 days ago. Viewed 71k times. I have used the below code but its not showing the msgbox.

What is wrong with this code? EventArgs Handles Me. Yes Then me. Close End If End Sub. Active Oldest Votes. SLaks SLaks k gold badges silver badges bronze badges.

vb net close form

No Then e. Getting Error : 'Cancel' is not a member of 'System. Sorry, didn't notice that. FormClosing If MessageBox. Show "Are you sur to close this application?

YesNo, MessageBoxIcon. Yes Then Else e. Jack Jack 8, 3 3 gold badges 18 18 silver badges 24 24 bronze badges. Close End If. Sivashankar Sivashankar 21 1 1 bronze badge. If MessageBox. I think it is more clean and simply! If MsgBox "Are you sure you want to Exit? Filippo Filippo 11 1 1 bronze badge.The following example uses Closing to test if the text in a TextBox has changed. If it has, the user is asked whether to save the changes to a file. The Closing event is obsolete starting with the.

vb net close form

NET Framework 2. The Closing event occurs as the form is being closed. When a form is closed, all resources created within the object are released and the form is disposed. If you cancel this event, the form remains opened.

To cancel the closure of a form, set the Cancel property of the CancelEventArgs passed to your event handler to true. When a form is displayed as a modal dialog box, clicking the Close button the button with an X at the upper-right corner of the form causes the form to be hidden and the DialogResult property to be set to DialogResult. You can override the value assigned to the DialogResult property when the user clicks the Close button by setting the DialogResult property in an event handler for the Closing event of the form.

When the Close method is called on a Form displayed as a modeless window, you cannot call the Show method to make the form visible, because the form's resources have already been released. To hide a form and then make it visible, use the Control.

Hide method. The Form. Closed and Form. Closing events are not raised when the Application. Exit method is called to exit your application. If you have validation code in either of these events that must be executed, you should call the Form.

Close method for each open form individually before calling the Exit method. However, canceling the event will set to true the Cancel property of the CancelEventArgs that is passed as a parameter to the parent form. For more information about handling events, see Handling and Raising Events. Skip to main content. Exit focus mode. Closing Event Definition Namespace: System.

Forms Assembly: System. Occurs when the form is closing.