OPC Data Client - OPC DA - C# - Subscribing to Items Stored in a CSV File

    //create the OPC Client object
    EasyDAClient easyDAClient1 = new EasyDAClient();

    //assign the callback event to the OPC Client object
    easyDAClient1.ItemChanged += easyDAClient1_ItemChanged;

    //create the file reader
    System.IO.StreamReader file = new System.IO.StreamReader("TestTags.csv");

    //skip the first line since it is a header
    string line = file.ReadLine();

    //keep reading the file until we reach the end.
    while ((line = file.ReadLine()) != null)
    {
        //the file is Comma seperated, we need to break the elements out individually
        string[] splitLine = line.Split(new char[] { ',' });

        //subscribe to each item.
        //splitLine[0] is the Machine IP
        //splitLine[1] is the OPC Server
        //splitLine[2] is the Tag Name
        easyDAClient1.SubscribeItem(splitLine[0], splitLine[1], splitLine[2], 1000, null);
    }


    //Close the file since we are done
    file.Close();
}
private void easyDAClient1_ItemChanged(object sender, EasyDAItemChangedEventArgs e)
{
    //add the item that changed to the list box
    listBox1.Items.Add(string.Format("Tag: {0}, Value: {1}, Quality: {2}, Timestamp: {3}", e.Arguments.ItemDescriptor.ItemId, e.Vtq.Value.ToString(), e.Vtq.Quality.QualityChoiceBitField.ToString(), e.Vtq.Timestamp.ToString()));
}

A sample project can be found here:

• CSharp SubscribingToItemsInACSV.zip