Form freezes after showing, hiding and re-displaying

[williamdepadua]

Hello, follow the schematic code. 

<Autodesk.autocad.rutime.commandmethod("teste")>_

Public Sub open()

ShowModalDialog(Myform)

End Sub

Private Sub btClick()

Me.hide()

.

.

.

If ...... then

ShowModalDialog(Myform)

Exit sub

End if

End sub

I view my form in a restricted way, click on a button that hides the form using myform.hide, and ask me to select an entity. If I deselect it, it should display the form again. This works the first time I cancel, but if I do it one more time, the form freezes. The sequence would be to display form, click button, esc, click button, and esc. Freezes.

[Norman_Yuan · Accepted solution]

It is known issue that calling Form.Hide() with a modal form in AutoCAD plugin is problematic.

When user needs to interact with AutoCAD editor from a modal UI, as you intend to do, you should use EditorUserInteraction object, by calling

var editor=Application.DocumentManager.MdiActiveDocument.Editor;

// This hide the modal form automatically

using (edit.StartUserInteraction([modalForm]))

{

   // Do selection in AutoCAD editor here

   // When the using{...} ends, the modal form shows back automatically

}

[williamdepadua]

Great, it worked. Thank you