/// <summary>
/// 当KEPWARE端OPCITEM的值发生变化时触发此事件
/// </summary>
/// <param name="blockName">数据块名称</param>
/// <param name="status">数据块的Quality编码</param>
protected virtual void OnBadBlockDetected(string blockName, OPCQualities status)
{
if (BadBlockDetected != null)
{
BadBlockDetected(blockName, status);
}
}
private void _client_BadBlockDetected(string blockName, OPCQualities status)
{
if (status != OPCQualities.Good)
{
this.State = ServiceState.Warning;
picStatus.Image = imageList1.Images["yellow.png"];
}
else
{
this.State = ServiceState.OK;
picStatus.Image = imageList1.Images["green.png"];
}
}
private void Client_BadBlockDetected(string blockName, OPCQualities status)
{
lblStatus.Text = blockName + "连接品质不正常，代码为 " + status;
}
/// <summary>
/// 更新一组OPCItem值
/// </summary>
/// <param name="blocks">要更新的item列表</param>
/// <returns>是否更新成功</returns>
public bool SetValues(Dictionary <string, string> blocks)
{
if (blocks.Count == 0)
{
return(true);
}
// 组合xml请求
string xml = "<?xml version=\"1.0\" encoding=\"utf-8\"?><write>";
foreach (string key in blocks.Keys)
{
xml += "<item name=\"" + key + "\" quality=\"\">" + blocks[key] + "</item>";
}
xml += "</write>";
string cmd = "ESTSHOPCSVC.WRITES:" + xml;
while (!this.Connected && !_socket.Connected)
{
this.Connect();
Application.DoEvents();
Thread.Sleep(20);
}
bool done = false;
while (!done)
{
try
{
_socket.Send(Encoding.UTF8.GetBytes(cmd));
done = true;
}
catch { this.Connect(); Application.DoEvents(); Thread.Sleep(20); }
}
this.WaitDataAvailableTimeout(_socket, this.Timeout);
try {
if (_socket.Available == 0)
{
return(false);
}
}
catch { return(false); }
byte[] bytes = new byte[_socket.Available];
done = false;
while (!done)
{
try
{
_socket.Receive(bytes, bytes.Length, SocketFlags.None);
done = true;
}
catch { this.Connect(); Application.DoEvents(); Thread.Sleep(20); }
}
string reply = Encoding.UTF8.GetString(bytes);
// 解析服务器返回的信息
bool ret = true;
if (reply.StartsWith("ESTSHOPCSVC.RESULT:"))
{
xml = reply.Split(':')[1];
try
{
_doc.LoadXml(xml);
}
catch { return(false); }
foreach (XmlNode node in _doc.DocumentElement.SelectNodes("item"))
{
if (node.InnerText != blocks[node.Attributes.GetNamedItem("name").InnerText])
{
ret = false;
}
try {
OPCQualities quality = (OPCQualities)Enum.Parse(typeof(OPCQualities), node.Attributes.GetNamedItem("quality").InnerText);
if (quality != OPCQualities.Good)
{
OnBadBlockDetected(node.Attributes.GetNamedItem("name").InnerText, quality);
}
}
catch { }
}
}
else
{
ret = false;
}
return(ret);
}
/// <summary>
/// 获取OPCItem值
/// </summary>
/// <param name="block">数据块名称</param>
/// <returns>获得的值</returns>
public string GetValue(string block)
{
while (!this.Connected && !_socket.Connected)
{
this.Connect();
Application.DoEvents();
Thread.Sleep(20);
}
bool done = false;
while (!done)
{
try
{
string cmd = "ESTSHOPCSVC.READ:" + block;
_socket.Send(Encoding.UTF8.GetBytes(cmd));
done = true;
}
catch { this.Connect(); Application.DoEvents(); Thread.Sleep(20); }
}
this.WaitDataAvailableTimeout(_socket, this.Timeout);
try
{
if (_socket.Available == 0)
{
return("ERROR");
}
} catch { return("ERROR"); }
byte[] bytes = new byte[_socket.Available];
done = false;
while (!done)
{
try
{
_socket.Receive(bytes, bytes.Length, SocketFlags.None);
done = true;
}
catch { this.Connect(); Application.DoEvents(); Thread.Sleep(20); }
}
string reply = Encoding.UTF8.GetString(bytes);
if (reply.StartsWith("ESTSHOPCSVC.RESULT:"))
{
try
{
OPCQualities quality = (OPCQualities)Enum.Parse(typeof(OPCQualities), reply.Split(':')[2]);
if (quality != OPCQualities.Good)
{
OnBadBlockDetected(block, quality);
}
}
catch { }
return(reply.Split(':')[1]);
}
else
{
return("ERROR");
}
}
private static void Client_BadBlockDetected(string blockName, OPCQualities status)
{
Console.Write(blockName + " quality is " + status.ToString());
}
