// This example shows how to read the values of 4 different items at once.
mle_outputtext.Text = ""
// Instantiate the client object
OLEObject client
client = CREATE OLEObject
client.ConnectToNewObject("OpcLabs.EasyOpc.DataAccess.EasyDAClient")
// Prepare arguments.
OLEObject readItemArguments1
readItemArguments1 = CREATE OLEObject
readItemArguments1.ConnectToNewObject("OpcLabs.EasyOpc.DataAccess.OperationModel.DAReadItemArguments")
readItemArguments1.ServerDescriptor.ServerClass = "OPCLabs.KitServer.2"
readItemArguments1.ItemDescriptor.ItemID = "Simulation.Random"
OLEObject readItemArguments2
readItemArguments2 = CREATE OLEObject
readItemArguments2.ConnectToNewObject("OpcLabs.EasyOpc.DataAccess.OperationModel.DAReadItemArguments")
readItemArguments2.ServerDescriptor.ServerClass = "OPCLabs.KitServer.2"
readItemArguments2.ItemDescriptor.ItemID = "Trends.Ramp (1 min)"
OLEObject readItemArguments3
readItemArguments3 = CREATE OLEObject
readItemArguments3.ConnectToNewObject("OpcLabs.EasyOpc.DataAccess.OperationModel.DAReadItemArguments")
readItemArguments3.ServerDescriptor.ServerClass = "OPCLabs.KitServer.2"
readItemArguments3.ItemDescriptor.ItemID = "Trends.Sine (1 min)"
OLEObject readItemArguments4
readItemArguments4 = CREATE OLEObject
readItemArguments4.ConnectToNewObject("OpcLabs.EasyOpc.DataAccess.OperationModel.DAReadItemArguments")
readItemArguments4.ServerDescriptor.ServerClass = "OPCLabs.KitServer.2"
readItemArguments4.ItemDescriptor.ItemID = "Simulation.Register_I4"
OLEObject readItemArgumentsList
readItemArgumentsList = CREATE OLEObject
readItemArgumentsList.ConnectToNewObject("OpcLabs.BaseLib.Collections.ElasticVector")
readItemArgumentsList.Add(readItemArguments1)
readItemArgumentsList.Add(readItemArguments2)
readItemArgumentsList.Add(readItemArguments3)
readItemArgumentsList.Add(readItemArguments4)
// Obtain values.
OLEObject valueResultList
valueResultList = client.ReadItemValueList(readItemArgumentsList)
// Display results
Int i
FOR i = 0 TO valueResultList.Count - 1
OLEObject valueResult
valueResult = valueResultList.Item[i]
IF valueResult.Succeeded THEN
mle_outputtext.Text = mle_outputtext.Text + "valueResult[" + String(i) + "].Value: " + String(valueResult.Value) + "~r~n"
ELSE
mle_outputtext.Text = mle_outputtext.Text + "valueResult[" + String(i) + "] *** Failure: " + valueResult.ErrorMessageBrief + "~r~n"
END IF
NEXT