When user clicks on x and then I need to reload that form

[dschuessler]

I was needing to add .hide and .shows on the form the only time now I run into the previous error is when I close the form by clicking on the x.

1. Is there away to avoid the previous error if a user closed the form by clicking the x and then I need to reload that form again?
If anyone can help me with this issue I would greatly appreciate it.

Thanks to everyone on vbforums.
The help is outstanding.

Previous error:
An unhandled exception of type 'System.ObjectDisposedException' occurred in system.windows.forms.dll
Additional information: Cannot access a disposed object named "Form2".


Thanks again for all the help.
Dan Schuessler

[dschuessler]

When a user clicks on the x and I need to reuse that form. Is it possible to do that or not.

or is there an easy way to take out the x from the user. I would even consider this as an option.

Thanks so much
Dan Schuessler

[dschuessler]

Sorry, I found it just set the ControlBox to False.

However, just to be sure I'm doing this correct in vb.net is this the only way or can a user close a form with the X button and then reload that form whether it be a menu choice or a button click.

Thanks
Dan Schuessler

[SAS-Trooper]

I just tested my project and i can close a second form with the x and then reload the form from a button.

I'd say you've got some problem somewhere else thats affecting the close form event.

[dschuessler]

I get the error message:
An unhandled exception of type 'System.ObjectDisposedException' occurred in system.windows.forms.dll - when a user clicks on the x on the second form then I click the command button again.

Additional information: Cannot access a disposed object named "Form2".

After I saw your post I tried a new simple app Here is what I did and I get the same message.

I am using, form1, form2, a command buttone and a shared class. Here is the following code. I hope I am doing something wrong that can be easily corrected.

Only code I am using is from the command button on form1 to open form2 and I am making the forms shared in a class.

Class Code:
Public Class cAppForms
Public Shared appform1 As New Form1()
Public Shared appform2 As New Form2()
End Class

Form1 and Comamnd Button Code:
Public Class Form1

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
cAppForms.appform2.Show()
End Sub
End Class

No Code for Form2.


Thanks
Dan Schuessler

[dschuessler]

If I don't need the forms delcared in a class the form will close, open,reopen just fine. However, I need these forms in a class so they can be used throughout the app.

Any thoughts.

Thanks
Dan Schuessler

[dschuessler]

I'm not sure if this is the correct way to do it in vb.net but it works.
I just had to add this to each form.

#Region "Upgrade Support "
Private Shared m_vb6FormDefInstance As Form2
Private Shared m_InitializingDefInstance As Boolean
Public Shared Property DefInstance() As Form2
Get
If m_vb6FormDefInstance Is Nothing OrElse m_vb6FormDefInstance.IsDisposed Then
m_InitializingDefInstance = True
m_vb6FormDefInstance = New Form2()
m_InitializingDefInstance = False
End If
DefInstance = m_vb6FormDefInstance
End Get
Set(ByVal Value As Form2)
m_vb6FormDefInstance = Value
End Set
End Property
#End Region

Thanks
Dan Schuessler

[SAS-Trooper]

Well, you've got it working now then. I wasn't using a class for the form just the standard way thats why it was working for me then.

Well done!