How do I save textboxes with tabs depending which tab is open?

问题

I am trying to create a document writer in vb.net

So I decided to add a tab control, so I can create a new tab when I press a button. I would like to save the text in the tab that is open. I created a function the returns the text depending on what tab is open, but that only works for the two default tabs. I don't know how I would save if I've created a new tab.

The function to get the text is this:

Public Function getText() As String
If tabPage1.Visible = True Then
Return mainText.Text
ElseIf tabPage2.Visible = True Then
Return textBox1.Text
End If
End Function

I've done some research online, I've even looked at SharpDevelop's source code and I couldn't find anything. Thanks in advance!

EDIT :

Public Sub setText(Byval value As String)
  If tabPage1.Visible = True Then
     mainText.Text = value
  ElseIf tabPage2.Visible = True Then
     textBox1.Text = value
  End If
End Sub

Does anyone know how I would do an open feature determined on what tab is open (as before.)

回答1:

If I understand you correctly, you are trying to have a textbox in each of your tabPages generated dynamically. If this is the case you could generalize your GetText function with this code

Function GetText() As String
    If tabControl1.SelectedTab IsNot Nothing Then
        Return tabControl1.SelectedTab.Controls.OfType(Of TextBox)().First().Text
    End If

End Function

This requires that you have at least one textbox in each page (and your TabControl is named tabControl1). The SelectedTab property (if not nothing) is the current tabPage displayed by your tabControl

来源：https://stackoverflow.com/questions/34241621/how-do-i-save-textboxes-with-tabs-depending-which-tab-is-open