实例介绍
【实例截图】
【核心代码】
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using OPCAutomation;
namespace OPCtest4
{
public partial class Form1 : Form
{
OPCServer KepServer;
OPCGroups KepGroups;
OPCGroup KepGroup;
OPCItems KepItems;
OPCItem KepItem;
bool opc_connected = false;//连接状态
int itmHandleClient = 0;//客户端的句柄，句柄即控件名称，如“张三”，用来识别是哪个具体的对象,此处可理解为每个节点的编号
int itmHandleServer = 0;//服务器的句柄
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
GetLocalServer();
}
/// <summary>
/// 获取本地的OPC服务器名称
/// </summary>
public void GetLocalServer()
{
IPHostEntry host = Dns.GetHostEntry("127.0.0.1");
var strHostName = host.HostName;
try
{
KepServer = new OPCServer();
object serverList = KepServer.GetOPCServers(strHostName);
foreach (string turn in (Array)serverList)
{
cmbServerName.Items.Add(turn);
}
cmbServerName.SelectedIndex = 0;
btnConnServer.Enabled = true;
}
catch (Exception err)
{
MessageBox.Show("枚举本地OPC服务器出错：" err.Message, "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
/// <summary>
/// "连接"按钮点击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void BtnConnServer_Click(object sender, EventArgs e)
{
try
{
if (!ConnectRemoteServer(txtRemoteServerIP.Text, cmbServerName.Text))
{
return;
}
btnSetGroupPro.Enabled = true;
opc_connected = true;
GetServerInfo();
RecurBrowse(KepServer.CreateBrowser());
if (!CreateGroup())
{
return;
}
}
catch (Exception err)
{
MessageBox.Show("初始化出错：" err.Message, "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
/// <summary>
/// 连接服务器
/// </summary>
/// <param name="remoteServerIP">服务器IP</param>
/// <param name="remoteServerName">服务器名称</param>
/// <returns></returns>
public bool ConnectRemoteServer(string remoteServerIP, string remoteServerName)
{
try
{
KepServer.Connect(remoteServerName, remoteServerIP);
if (KepServer.ServerState == (int)OPCServerState.OPCRunning)
{
tsslServerState.Text = "已连接到-" KepServer.ServerName " ";
}
else
{
//这里你可以根据返回的状态来自定义显示信息，请查看自动化接口API文档
tsslServerState.Text = "状态：" KepServer.ServerState.ToString() " ";
}
}
catch (Exception err)
{
MessageBox.Show("连接远程服务器出现错误：" err.Message, "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return false;
}
return true;
}
/// <summary>
/// 获取服务器信息，并显示在窗体状态栏上
/// </summary>
public void GetServerInfo()
{
tsslServerStartTime.Text = "开始时间:" KepServer.StartTime.ToString() " ";
tsslversion.Text = "版本:" KepServer.MajorVersion.ToString() "." KepServer.MinorVersion.ToString() "." KepServer.BuildNumber.ToString();
}
/// <summary>
/// 展开树枝和叶子
/// </summary>
/// <param name="oPCBrowser">opc浏览器</param>
public void RecurBrowse(OPCBrowser oPCBrowser)
{
//展开分支
oPCBrowser.ShowBranches();
//展开叶子
oPCBrowser.ShowLeafs(true);
foreach (object turn in oPCBrowser)
{
listBox1.Items.Add(turn.ToString());
}
}
/// <summary>
/// 创建组，将本地组和服务器上的组对应
/// </summary>
/// <returns></returns>
public bool CreateGroup()
{
try
{
KepGroups = KepServer.OPCGroups;//将服务端的组集合复制到本地
KepGroup = KepGroups.Add("S");//添加一个组
SetGroupProperty();//设置组属性
KepItems = KepGroup.OPCItems;//将组里的节点集合复制到本地节点集合
KepGroup.DataChange = KepGroup_DataChange;
KepGroup.AsyncWriteComplete = KepGroup_AsyncWriteComplete;
}
catch (Exception err)
{
MessageBox.Show("创建组出现错误：" err.Message, "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Warning);
return false;
}
return true;
}
/// <summary>
/// 设置组的属性，从对应的控件里获取
/// </summary>
public void SetGroupProperty()
{
KepServer.OPCGroups.DefaultGroupIsActive = Convert.ToBoolean(txtGroupIsActive.Text);//激活组
KepServer.OPCGroups.DefaultGroupDeadband = Convert.ToInt32(txtGroupDeadband.Text);// 死区值，设为0时，服务器端该组内任何数据变化都通知组
KepGroup.UpdateRate = Convert.ToInt32(txtUpdateRate.Text);//服务器向客户程序提交数据变化的刷新速率
KepGroup.IsActive = Convert.ToBoolean(txtIsActive.Text);//组的激活状态标志
KepGroup.IsSubscribed = Convert.ToBoolean(txtIsSubscribed.Text);//是否订阅数据
}
/// <summary>
/// 异步写方法
/// </summary>
/// <param name="TransactionID">处理ID</param>
/// <param name="NumItems">项个数</param>
/// <param name="ClientHandles">OPC客户端的句柄</param>
/// <param name="Errors">错误个数</param>
private void KepGroup_AsyncWriteComplete(int TransactionID, int NumItems, ref Array ClientHandles, ref Array Errors)
{
lblState.Text = "";
for (int i = 1; i <= NumItems; i )
{
lblState.Text = "Tran:" TransactionID.ToString() " CH:" ClientHandles.GetValue(i).ToString() " Error:" Errors.GetValue(i).ToString();
}
}
/// <summary>
/// 数据订阅方法
/// </summary>
/// <param name="TransactionID">处理ID</param>
/// <param name="NumItems">项个数</param>
/// <param name="ClientHandles">OPC客户端的句柄</param>
/// <param name="ItemValues">节点的值</param>
/// <param name="Qualities">节点的质量</param>
/// <param name="TimeStamps">时间戳</param>
private void KepGroup_DataChange(int TransactionID, int NumItems, ref Array ClientHandles, ref Array ItemValues, ref Array Qualities, ref Array TimeStamps)
{
for (int i = 1; i <= NumItems; i )//下标一定要从1开始，NumItems参数是每次事件触发时Group中实际发生数据变化的Item的数量，而不是整个Group里的Items
{
this.txtTagValue.Text = ItemValues.GetValue(i).ToString();
this.txtQualities.Text = Qualities.GetValue(i).ToString();
this.txtTimeStamps.Text = TimeStamps.GetValue(i).ToString();
}
}
/// <summary>
/// 选择列表时触发的事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ListBox1_SelectedIndexChanged(object sender, EventArgs e)
{
try
{
if (itmHandleClient != 0)
{
this.txtTagValue.Text = "";
this.txtQualities.Text = "";
this.txtTimeStamps.Text = "";
Array Errors;
OPCItem bItem = KepItems.GetOPCItem(itmHandleServer);
//注：OPC中以1为数组的基数
int[] temp = new int[2] { 0, bItem.ServerHandle };
Array serverHandle = (Array)temp;
//移除上一次选择的项
KepItems.Remove(KepItems.Count, ref serverHandle, out Errors);
itmHandleClient = 1;//节点编号为1
KepItem = KepItems.AddItem(listBox1.SelectedItem.ToString(), itmHandleClient);//第一个参数为ItemID,第二个参数为节点编号，节点编号可自定义
itmHandleServer = KepItem.ServerHandle;//获取该节点的服务器句柄
}
else
{
itmHandleClient = 1;//节点编号为1
KepItem = KepItems.AddItem(listBox1.SelectedItem.ToString(), itmHandleClient);//第一个参数为ItemID,第二个参数为节点编号，节点编号可自定义
itmHandleServer = KepItem.ServerHandle;//获取该节点的服务器句柄
}
}
catch (Exception err)
{
//没有任何权限的项，都是OPC服务器保留的系统项，此处可不做处理。
itmHandleClient = 0;
txtTagValue.Text = "Error ox";
txtQualities.Text = "Error ox";
txtTimeStamps.Text = "Error ox";
MessageBox.Show("此项为系统保留项:" err.Message, "提示信息");
}
}
/// <summary>
/// 设置组属性的按钮点击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void BtnSetGroupPro_Click(object sender, EventArgs e)
{
SetGroupProperty();
}
/// <summary>
/// “写入”按钮点击事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void BtnWrite_Click(object sender, EventArgs e)
{
OPCItem bItem = KepItems.GetOPCItem(itmHandleServer);
int[] temp = new int[2] { 0, bItem.ServerHandle };
Array serverHandles = (Array)temp;
object[] valueTemp = new object[2] { "", txtWriteTagValue.Text };
Array values = (Array)valueTemp;
Array Errors;
int cancelID;
KepGroup.AsyncWrite(1, ref serverHandles, ref values, out Errors, 2009, out cancelID);
//KepItem.Write(txtWriteTagValue.Text);//这句也可以写入，但并不触发写入事件
GC.Collect();
}
/// <summary>
/// 关闭窗口事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if (!opc_connected)
{
return;
}
if (KepGroup != null)
{
KepGroup.DataChange -= new DIOPCGroupEvent_DataChangeEventHandler(KepGroup_DataChange);
}
if (KepServer != null)
{
KepServer.Disconnect();
KepServer = null;
}
opc_connected = false;
}
}
}
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