insert into sql table from list

I need to insert into sql table list of strings ("A", "B", "C" etc) as parameters
this is my code:

  Dim strSQLSubItem As String
Try
            Dim strConn As String = "Data Source=***;Initial Catalog=***;Persist Security Info=True;User ID=***;Password=***"
            Dim Connection As SqlConnection = New SqlConnection(strConn)

            Connection.Open()
Dim v As Integer = Integer.Parse(txtCountPerItem.Text)

            Dim ItemId As Integer = 3

strSQLSubItem = "Insert into InventoryVendorItem_SubItem(ItemId,VendorSubItemDefinition) Values(@ItemId,@VendorSubItemDefinition )"
                                    Using cmdInsertSubItem As New SqlCommand(strSQLSubItem, Connection)
                With cmdInsertSubItem

                    .CommandText = strSQLSubItem
                    .Connection = Connection
                    .CommandType = CommandType.Text

                    .Parameters.Add("@VendorSubItemDefinition", SqlDbType.VarChar)
                    .Parameters.Add("@ItemId", SqlDbType.Int)

 Dim SubItems As New List(Of String)


                    SubItems.Add("A")
                    SubItems.Add("B")
                    SubItems.Add("C")
                    SubItems.Add("D")
                    SubItems.Add("E")
                    SubItems.Add("F")
                    SubItems.Add("G")
                    SubItems.Add("H")
                    SubItems.Add("I")
                    SubItems.Add("J")

                    For i As Integer = 0 To v - 1


                                                .Parameters.Add("@VendorSubItemDefinition", SqlDbType.VarChar).Value = TryCast(SubItems.Item(i), String)
                        .Parameters.Add("@ItemId", SqlDbType.Int).Value = ItemId

                        .ExecuteNonQuery()

                    Next

                End With
            End Using
            Connection.Close()


        Catch Ex As Exception

        End Try

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I cannot insert into sql table.

Please, help.
msoutAsked:
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Robert SchuttSoftware EngineerCommented:
You keep adding parameters to the Command object in the loop. Remove the .Parameters.Add() statements on lines 19 and 20. Then change the loop code (lines 36-44) to:
                    .Parameters.Add("@ItemId", SqlDbType.Int).Value = ItemId
                    .Parameters.Add("@VendorSubItemDefinition", SqlDbType.VarChar)
                    For i As Integer = 0 To v - 1
                        .Parameters("@VendorSubItemDefinition").Value = SubItems.Item(i)
                        .ExecuteNonQuery()
                    Next

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Note that I can't make sure this works obviously without access to your database but this should be the general idea.
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Robert SchuttSoftware EngineerCommented:
quick test with local sqlexpress database was successful:
screen capture of inserted records
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msoutAuthor Commented:
Great!
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