無法將打開的表單帶到前台/焦點vb.net

Question

嗨，我有五種形式，並且我只想在未打開的情況下打開一種形式，如果它是開放的，那么請先關注或關注。 我曾嘗試使用BringToFront ， Show和TopMost但沒有任何效果。

If Not Application.OpenForms.OfType(Of StudentRegistrationFrm).Any Then
        StudentRegistrationFrm.ShowDialog()
    Else
        StudentRegistrationFrm.BringToFront()
        'Me.SendToBack()
End If

Answer 1

我已經通過關閉當前表單解決了它。

 If Not Application.OpenForms.OfType(Of StudentRegistrationFrm).Any Then
        StudentRegistrationFrm.Show()
    Else
        Me.Close()
    End If
   Private Sub StudentInformationToolStripMenuItem_Click(sender As Object, e As EventArgs) Handles StudentInformationToolStripMenuItem.Click
    Dim studentReg As StudentInfoFrm = New StudentInfoFrm
    studentReg.Show()
    Me.Close()
 End Sub