ASP.net placing database model numbers into an array - asp.net

Question

Hey all i am trying to figure out how to add some of my model numbers from my database to am array while looping.
This is my code:
objCmd = New MySqlCommand(strSQL, objConn)
dtReader = objCmd.ExecuteReader()
If dtReader.HasRows() Then
grdViewItems.DataSource = dtReader
grdViewItems.DataBind()
Dim arrayOfItems As String() = New String() {}
While dtReader.Read()
arrayOfItems(intX) = dtReader.GetString("model_number")
'arrayItems(intX) = dtReader.GetString("model_number")
intX += 1
End While
'Session.Add("arrayOfItems", arrayItems)
Session("arrayOfItems") = arrayOfItems
dtReader.Close()
dtReader = Nothing
objConn.Close()
objConn = Nothing
End If
Problem being that it never populates the array with the values (although the values are present in the gridview because it skips the reading of the values in the while loop.
What am i doing incorrectly here?
Complete code
Dim intX As Integer = 0
objConn = New MySqlConnection(product.strConnString)
objConn.Open()
strSQL = "SELECT prod.id, PP.model_number, description, price, price_new, price_direct, price_builder " & _
"FROM product as prod " & _
"INNER JOIN product_price as PP ON PP.product_id = prod.type " & _
"WHERE prod.id = " & pageID & ";"
Try
objCmd = New MySqlCommand(strSQL, objConn)
dtReader = objCmd.ExecuteReader()
If dtReader.HasRows() Then
grdViewItems.DataSource = dtReader
grdViewItems.DataBind()
Dim arrayOfItems As New List(Of String)()
For Each row As GridViewRow In grdViewItems.Rows
arrayOfItems(intX) = row.Cells(0).Text.ToString
intX = intX + 1
Next
MsgBox(arrayOfItems(0))
'Session.Add("arrayOfItems", arrayItems)
Session("arrayOfItems") = arrayOfItems
dtReader.Close()
dtReader = Nothing
objConn.Close()
objConn = Nothing
End If
Catch ex As Exception
MsgBox("LoadProductItems: " & ex.Message)
End Try

Answer 1

Instead of array, I would recommend using List of int or string

Answer 2

It looks like the problem is in your loop. Replace the following code
Do While dtReader.Read
arrayOfItems(intX) = dtReader.GetString("model_number")
intX += 1
Loop
'with this code
While dtReader.Read()
arrayOfItems(intX) = dtReader.GetString("model_number")
intX += 1
End While
Updated Answer:
When you assign data to gridview then also save the data in a datatable like this
Dim dt As DataTable = New DataTable
dt = dtReader
`Then get the data from the table
Dim i As Integer = 0
Do While (i < dt.Rows.Count)
dt.Rows(i)("COlumnName").ToString
i = (i + 1)
Loop
Again Updated Answer:
Read the data from the gridview
For Each row As GridViewRow In grdViewItems.Rows
arrayOfItems(intX) = row.Cells(0).Text.ToString ` in cell specify the index of the model_number column
intX = intX + 1
Next