// This example shows how to write a value into a single item, specifying its requested data type.
 
using OpcLabs.BaseLib.ComInterop;
using OpcLabs.EasyOpc.DataAccess;
 
namespace DocExamples
{
    namespace _EasyDAClient
    {
        partial class WriteItemValue
        {
            public static void RequestedDataType()
            {
                var client = new EasyDAClient();
 
                client.WriteItemValue("", "OPCLabs.KitServer.2", "Simulation.Register_I4", 12345,
                    VarTypes.I4);   // <-- the requested data type
            }
        }
    }
}

// Shows how to write into multiple OPC items using a single method call, specifying their requested data types.
 
using System;
using System.Diagnostics;
using OpcLabs.BaseLib.ComInterop;
using OpcLabs.BaseLib.OperationModel;
using OpcLabs.EasyOpc.DataAccess;
using OpcLabs.EasyOpc.DataAccess.OperationModel;
 
namespace DocExamples
{
    namespace _EasyDAClient
    {
        partial class WriteMultipleItemValues
        {
            public static void RequestedDataType()
            {
                var client = new EasyDAClient();
 
                Console.WriteLine("Writing multiple item values...");
                OperationResult[] resultArray = client.WriteMultipleItemValues(new[] { 
                    new DAItemValueArguments("", "OPCLabs.KitServer.2", "Simulation.Register_I2", 12345) 
                        { ItemDescriptor = { RequestedDataType = VarTypes.I2}}, // <-- the requested data type
                    new DAItemValueArguments("", "OPCLabs.KitServer.2", "Simulation.Register_R4", 234.56)
                        { ItemDescriptor = { RequestedDataType = VarTypes.R4}}  // <-- the requested data type 
                });
 
 
                for (int i = 0; i < resultArray.Length; i++)
                {
                    Debug.Assert(resultArray[i] != null);
                    if (resultArray[i].Succeeded)
                        Console.WriteLine("Result {0}: success", i);
                    else
                    {
                        Debug.Assert(resultArray[i].Exception != null);
                        Console.WriteLine("Result {0}: {1}", i, resultArray[i].Exception.GetBaseException().Message);
                    }
                }
 
                Console.WriteLine("Reading multiple item values...");
                ValueResult[] valueResultArray = client.ReadMultipleItemValues("OPCLabs.KitServer.2",
                    new DAItemDescriptor[] { "Simulation.Register_I2", "Simulation.Register_R4" });
 
                for (int i = 0; i < valueResultArray.Length; i++)
                {
                    Debug.Assert(valueResultArray[i] != null);
                    Console.WriteLine("valueResultArray[{0}]: {1}", i, valueResultArray[i]);
                }
            }
        }
    }
}