TabControl Issue

Question

Hi Team

I have tab control in windows form. The tab control has two tabs . One tab contain form with textbox and another tab contain only textbox . What I am trying select the text from 1st tab but not able to select the text from the text box. I have no problem selecting the text from the second tab. We have attached the sample from following location.

Sample: https://1drv.ms/u/s!AsISs7GoFbYYgsFck1q05FFRR0U4bw?e=vQ5C9H

Kindly check the sample and let me know any way to solve this behavior?

Answer 1

Hi SaravananGanesn-3331,
First, you can give your textbox control a name for easy searching later.

textBox.Name = "t1"  

And the you need to cast the control in the TabPage back to Form before you can access the property.
Please refer to the following code example:

Private Sub button1_Click(ByVal sender As Object, ByVal e As EventArgs)  
    If tabControl1.SelectedTab IsNot Nothing Then  
  
        If tabControl1.SelectedTab.Controls.Count > 0 Then  
  
            If TypeOf tabControl1.SelectedTab.Controls(0) Is Form Then  
                Dim f2 As Form = CType(tabControl1.SelectedTab.Controls(0), Form)  
                label1.Text = f2.Controls.Find("t1", True).FirstOrDefault().Text  
            End If  
        End If  
    End If  
End Sub  

Best Regards,
Daniel Zhang

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