Why I get an 'System.ObjectDisposedException' when open the second time a Form?

[DevilAkuma]

I created a simple form with the .NET's assistant.

At the top of the code, I have...

Dim myForm As New myForm

And when I click a button I do only this...

myForm.Show()

The first time runs very well, but when I close this form, and try to open it another time I get a sad 'System.ObjectDisposedException'. Is it normal?

Thanks in advance.

 

[Paszt]

Yes this is normal. When you close a form it gets disposed of (eventually) and that instance is no longer existant. Therefore before calling the show method for a form you should check to see if it exists and if it has been disposed of and if it doesn't exist or has been disposed then create a new instance. I'm not following your code posted above however since you declare myForm but then use the variable cercalia. I've no idea what cercalia is.
About the first line of code: it's not a good idea to have the variable name the same as the class name, it's confusing.

 

[DevilAkuma]

Sorry... I've edited my first post. Cercalia was another part of my code... I wanted to write myForm.Show().

About your explanation, tomorrow I'm going to try it.

Thanks a lot!