public bool LoadServers(string file)
{
XmlDocument XmlDoc = new XmlDocument();
try
{
XmlDoc.Load(System.IO.Path.GetFullPath(file));
}
catch
{
return(false);
}
if (XmlDoc.DocumentElement == null)
{
return(false);
}
if (XmlDoc.DocumentElement.Name == "servergroups")
{
foreach (XmlNode XmlGroup in XmlDoc.SelectNodes("servergroups/servergroup"))
{
ServerGroup servergroup = AddServerGroup();
foreach (XmlNode XmlServer in XmlGroup.SelectNodes("servers/server"))
{
string Address = XmlServer.SelectSingleNode("address").InnerText;
int Port = int.Parse(XmlServer.SelectSingleNode("port").InnerText);
int Connections = int.Parse(XmlServer.SelectSingleNode("connections").InnerText);
bool RequiresLogin = XmlServer.SelectSingleNode("login").HasChildNodes;
string Username = "";
string Password = "";
if (RequiresLogin)
{
Username = XmlServer.SelectSingleNode("login/username").InnerText;
Password = XmlServer.SelectSingleNode("login/password").InnerText;
}
bool NeedsGroup = true;
if (XmlServer.SelectSingleNode("needsgroup") != null)
{
NeedsGroup = (XmlServer.SelectSingleNode("needsgroup").InnerText.ToLower() == "true");
}
Server server = servergroup.AddServer(new Server(Address, Port, Connections, RequiresLogin, Username, Password, NeedsGroup));
if (XmlServer.Attributes.GetNamedItem("enabled") != null)
{
if (!bool.Parse(XmlServer.Attributes.GetNamedItem("enabled").InnerText))
{
DisableServer(server);
}
}
}
}
}
return(true);
}
/// <summary>
/// Reading all readings from an OPC server.
/// </summary>
private void ProcessOPCServer(OOPCDAServer opcDaServer)
{
if (opcDaServer.AutomaticPollingEnabled == 0)
return;
XmlServer srv = null;
try
{
srv = new XmlServer(opcDaServer.ObjectName);
List<OPoint> points = TablesLogic.tPoint.LoadList(
TablesLogic.tPoint.OPCDAServerID == opcDaServer.ObjectID);
if (points.Count == 0)
return;
List<ReadRequestItem> readRequestItems = new List<ReadRequestItem>();
Hashtable hash = new Hashtable();
foreach (OPoint point in points)
{
readRequestItems.Add(NewReadRequestItem(point.OPCItemName));
hash[point.OPCItemName] = point;
}
ReadRequestItemList readItemList = new ReadRequestItemList();
readItemList.Items = readRequestItems.ToArray();
ReplyBase reply;
RequestOptions options = new RequestOptions();
options.ReturnErrorText = true;
options.ReturnItemName = true;
ReplyItemList rslt;
OPCError[] err;
reply = srv.Read(options, readItemList, out rslt, out err);
if (rslt == null)
throw new Exception(err[0].Text);
else
{
int count = 0;
foreach (ItemValue iv in rslt.Items)
{
if (iv.ResultID == null)
{
try
{
using (Connection c = new Connection())
{
// Create the readings.
//
OReading reading = TablesLogic.tReading.Create();
OPoint point = hash[iv.ItemName] as OPoint;
if (point != null)
{
reading.PointID = point.ObjectID;
reading.LocationID = point.LocationID;
//reading.LocationTypeParameterID = point.LocationTypeParameterID;
reading.EquipmentID = point.EquipmentID;
//reading.EquipmentTypeParameterID = point.EquipmentTypeParameterID;
reading.DateOfReading = DateTime.Now;
if (iv.Value is bool)
reading.Reading = ((bool)iv.Value) ? 1 : 0;
else
reading.Reading = Convert.ToDecimal(iv.Value.ToString());
reading.Source = ReadingSource.OPCServer;
reading.CheckForBreachOfReading(point);
reading.Save();
count++;
}
c.Commit();
}
}
catch (Exception ex)
{
LogEvent(ex.Message + "\n\n" + ex.StackTrace, BackgroundLogMessageType.Error);
}
}
else
LogEvent("Error reading '" + iv.ItemName + "': " + iv.ResultID.Name, BackgroundLogMessageType.Error);
}
LogEvent(count + " points out of " + readItemList.Items.Length + " successfully read from server '" + opcDaServer.ObjectName + "'.");
}
}
catch (Exception ex)
{
LogEvent(ex.Message + "\n\n" + ex.StackTrace, BackgroundLogMessageType.Error);
}
finally
{
if (srv != null)
srv.Dispose();
}
}