View source for Configuring a DataSubscriber2 with a CSV file

== Using a Comma Separated Text File to Configure a DataSubscriber2 ==

This walk-through will show how to configure the list of PLCAddressVaueItems in a DataSubscriber using a text file.

1) In Solution Explorer, right click the AdvancedHMI project and select Add->New Item<br>
2) From the list select Text File<br>
3) Name the text file MyConfigFile.txt and click the Add button<br>
4) In Solution Explorer, click the new file once to select it<br>
5) In the Properties Window change Copy To Output Directory to Copy If Newer<br>
6) In Solution Explorer double click the file to edit<br>
7) Add these lines to the file:<br>

DINTTag,1,0<br>
LINTTag,1,0

8) In Solution Explorer under the AdvancedHMI project, double click MainForm to show design view<br>
9) From the Toolbox ad a DataSubscriber2<br>
10) Double click on a blank area of the MainForm to get to the FormLoad event handler<br>
11) Add this code:<br>

        '* Start initializing the Datasubscriber to prevent subscribing until all items added
        DataSubscriber21.BeginInit()

        '* Open the configuration file
        Using sw As New System.IO.StreamReader("MyConfigFile.txt")
            Dim LineFromFile As String
            Dim Settings() As String
            Dim NewPLCAddressItem As MfgControl.AdvancedHMI.Drivers.PLCAddressItem
            While Not sw.EndOfStream
                '* Read a line from the file
                LineFromFile = sw.ReadLine

                '* Split into comma separated items
                Settings = LineFromFile.Split(",")

                '* Create a new PLCAddresItem to setup and add to the list
                NewPLCAddressItem = New MfgControl.AdvancedHMI.Drivers.PLCAddressItem
                NewPLCAddressItem.PLCAddress = Settings(0)
                If Settings.Length > 1 Then
                    NewPLCAddressItem.ScaleFactor = CDbl(Settings(1))
                End If
                If Settings.Length > 2 Then
                    NewPLCAddressItem.ScaleOffset = CDbl(Settings(2))
                End If

                '* Add the new item to the datasubscriber
                DataSubscriber21.PLCAddressValueItems.Add(NewPLCAddressItem)
            End While
        End Using

        '* Allow the Datasubscriber to proceed
        DataSubscriber21.EndInit()