LuckyLuke82 LuckyLuke82 - 3 months ago 22 Question

VB.NET - Form in TabControl not opened after closing It

I have ToolStripMenu from where I open forms. Forms are opened in TabControl, which is placed in one of the Split Container's panel. I have placed a button in Split container too, It closes any selected TabPages(where forms open). Problem is that when I open form in new TabPage and close It by this button, form doesn't open anymore. WHY ? ....Here is my code:

Private Sub SearchItemsAPOToolStripMenuItem_Click(sender As Object, e As EventArgs) Handles SearchItemsToolStripMenuItem.Click

'Define new page in Tab control and form to open in It
Dim PageNew As New TabPage()
Dim FrmItem As New Search_Items

'Define where and how form should open
FrmItem.TopLevel = False
FrmItem.Dock = DockStyle.Fill
FrmItem.FormBorderStyle = FormBorderStyle.None

'If form allready opened in TabPage, only send focus to It
If Application.OpenForms().OfType(Of Search_Items).Any Then

For Each page As TabPage In TabControl1.TabPages

If page.Text = "Search Items" Then

TabControl1.SelectedTab = page

End If

Next page

'If form not allready opened, we open It in Tab control and send focus on that TabPage

PageNew.Text = "Search Items"
TabControl1.Visible = True
BtnTab.Visible = True
TabControl1.SelectedTab = PageNew

End If

End Sub

Private Sub BtnTab_Click(sender As Object, e As EventArgs) Handles BtnTab.Click

'Button is visible when TabPages are opened, and with click It closes selected TabPage

'IF no TabPages, button hides again
If TabControl1.TabPages.Count = 0 Then
TabControl1.Visible = False
BtnTab.Visible = False
End If
End Sub


The object already exists and is only hidden and you are creating it again, dispose of the onjext before recreating it.

Dim tbp As TabPage = TabControl1.SelectedTab