I use OPC-UA SDK of treager. I have variable created be PLC S7-1200
.
It displayed the value on Console.WriteLine, but I cant show it on listView
.
Can someone help me show the variable changes on listView1 ?
If I note listView1.Items.Add(itm);
It will show that
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using Opc.Ua.Client;
using Opc.UaFx;
using Opc.UaFx.Client;
namespace Test_OPC
{
public partial class OPCUA : Form
{
private readonly OpcClient client;
public static OpcValue isRunning;
string[] arr = new string[4];
ListViewItem itm;
public OPCUA()
: base()
{
this.client = new OpcClient("opc.tcp://192.168.1.200:4840");
InitializeComponent();
}
private void OPCUA_Load(object sender, EventArgs e)
{
client.Connect();
OpcSubscription subscription = client.SubscribeDataChange("ns=4;i=15",HandleDataChanged);
//ListViewItem listView1 = new ListViewItem();
//ListViewItem itemHienThi = new ListViewItem();
//Add Item vào ListView
arr[0] = "01";
arr[1] = "100";
arr[2] = "10";
itm = new ListViewItem(arr);
listView1.Items.Add(itm);
}
private void HandleDataChanged(object sender,OpcDataChangeReceivedEventArgs e)
{
OpcMonitoredItem item = (OpcMonitoredItem)sender;
//Add the attribute name/value to the list view.
arr[0] = item.NodeId.ToString();
arr[1] = e.Item.Value.ToString();
itm = new ListViewItem(arr);
listView1.Items.Add(itm);
Console.WriteLine("Data Change from NodeId '{0}': {1}",item.NodeId,e.Item.Value);
}
}
}