getting values from two dynamic textboxes in different Panels - asp.net

Question

I have two dynamic textboxes in different Panels. When I click the button save it saves multiple records on the system. for example: I have two textbox on each panel. On the Panel 1 lets say it has (a, b) and On the Panel 2 lets say it has (1 ,2). What I'm expecting a result is a1 and b2. but the result goes like this a1 a2 b1 b2 which is wrong. Please help. here's the code of the button.
For Each text2 As TextBox In pnlTextBoxes.Controls.OfType(Of TextBox)()
For Each text1 As TextBox In pnlTextdesc.Controls.OfType(Of TextBox)()
Dim con As New SqlConnection(ConfigurationManager.ConnectionStrings("prod").ToString)
con.Open()
Try
Using cmd As New SqlCommand("INSERT INTO tblProduct (ProductName,productdescription) VALUES (#ProductName,#productdescription) ")
cmd.Parameters.AddWithValue("#ProductName", text2.text)
cmd.Parameters.AddWithValue("#productdescription", text1.text)
cmd.Connection = con
cmd.ExecuteNonQuery()
End Using
Catch ex As Exception
MsgBox(ex.Message)
End Try
con.Close()
Next
Next

Answer 1

You get that result because you are using nested For Each loops. If you have two letters and two numbers and, for each letter, you combine it with each number, of course you'll end up with four combinations. What you should do is create two lists of TextBoxes from the two Panels, then use a single For loop to combine them by index, e.g.
Dim list1 = TextBox In pnlTextBoxes.Controls.OfType(Of TextBox)().ToArray()
Dim list2 = TextBox In pnlTextdesc.Controls.OfType(Of TextBox)().ToArray()
For i = 0 To list1.GetUpperBound(0)
Dim text1 = list1(i)
Dim text2 = list2(i)
'...
Next
This assumes that there will be the same number of TextBoxes in each Panel and that they are in corresponding order.