AFListData Class

public class AFListData

// This example demonstrates how to update multiple values using
// the AFListData.UpdateValues method

// Get the Database and UOMs
PISystems myPISystems = new PISystems();
PISystem myPISystem = myPISystems.DefaultPISystem;
AFDatabase myDB = myPISystem.Databases.DefaultDatabase;
UOM uomYard = myPISystem.UOMDatabase.UOMs["yard"];
UOM uomSqFoot = myPISystem.UOMDatabase.UOMs["square foot"];
UOM uomLiter = myPISystem.UOMDatabase.UOMs["liter"];

// Create the Element
AFElement myElement = myDB.Elements.Add("MyElement");
AFAttribute myAttribute = myElement.Attributes.Add("MyAttribute");
myAttribute.Type = typeof(double);
myAttribute = myElement.Attributes.Add("MyAttribute2");
myAttribute.Type = typeof(double);

// Create List of Attributes and their new values
AFTime newTime = new AFTime("T-1d", CultureInfo.CurrentCulture);
AFAttributeList attrList = new AFAttributeList();
List<AFValue> newValues = new List<AFValue>();
Random randomValues = new Random();

// Create Dynamic Attribute to a PIPoint to Update
PIServer piServer = PIServers.GetPIServers().DefaultPIServer;
if (PIPoint.TryFindPIPoint(piServer, "MyTestPoint#1", out PIPoint point))
{
    myAttribute = new AFAttribute(point);
    myAttribute.DefaultUOM = uomLiter;
    myAttribute.ConfigString += ";ReadOnly=False";
    attrList.Add(myAttribute);
    newValues.Add(new AFValue(myAttribute, randomValues.NextDouble(), newTime, uomLiter));
}
if (PIPoint.TryFindPIPoint(piServer, "MyTestPoint#2", out point))
{
    myAttribute = new AFAttribute(point);
    myAttribute.DefaultUOM = uomYard;
    myAttribute.ConfigString += ";UOM=ft;ReadOnly=True";
    attrList.Add(myAttribute);
    newValues.Add(new AFValue(myAttribute, randomValues.NextDouble(), newTime, uomYard));
}

// Get some Attributes from the Element to Update
myAttribute = myElement.Attributes["MyAttribute"];
attrList.Add(myAttribute);
newValues.Add(new AFValue(myAttribute, 100, newTime, uomSqFoot));
myAttribute = myElement.Attributes["MyAttribute2"];
attrList.Add(myAttribute);
newValues.Add(new AFValue(myAttribute, 200, newTime, null));

// Get the Current Values for the Attributes
AFValues currentValues = attrList.GetValue(newTime);
Console.WriteLine("Current Values:");
foreach (AFValue value in currentValues)
{
    Console.WriteLine("  {0}: '{1} {2}' at '{3}'",
        value.Attribute, value.Value, value.UOM, value.Timestamp);
}

// Update the Attribute Values and Display any Errors
AFErrors<AFValue> errors =
    AFListData.UpdateValues(newValues, AFUpdateOption.Replace);
if (errors != null && errors.HasErrors)
{
    Console.WriteLine("\nErrors returned from AFListData.UpdateValues:");

    // Display Value errors
    if (errors.Errors != null && errors.Errors.Count > 0)
    {
        foreach (var item in errors.Errors)
        {
            Console.WriteLine("  AFValue '{0}': {1}", item.Key, item.Value);
        }
    }

    // Display error from the PI Data Archive
    if (errors.PIServerErrors != null && errors.PIServerErrors.Count > 0)
    {
        foreach (var item in errors.PIServerErrors)
        {
            Console.WriteLine("  AFValue '{0}': {1}", item.Key, item.Value);
        }
    }

    // Display PI System errors
    if (errors.PISystemErrors != null && errors.PISystemErrors.Count > 0)
    {
        foreach (var item in errors.PISystemErrors)
        {
            Console.WriteLine("  AFValue '{0}': {1}", item.Key, item.Value);
        }
    }
}

// Get the Updated Current Values for the Attributes
currentValues = attrList.GetValue(newTime);
Console.WriteLine("\nUpdated Current Values:");
foreach (AFValue value in currentValues)
{
    Console.WriteLine("  {0}: '{1} {2}' at '{3}'",
        value.Attribute, value.Value, value.UOM, value.Timestamp);
}