/// <summary>
/// Establishes a physical connection to the remote server identified by a OpcUrl.
/// </summary>
/// <param name="url">The network address of the remote server.</param>
/// <param name="connectData">Any protocol configuration or user authenication information.</param>
public virtual void Connect(OpcUrl url, OpcConnectData connectData)
{
if (url == null)
{
throw new ArgumentNullException("url");
}
if (_server != null)
{
throw new OpcResultException(new OpcResult((int)OpcResult.E_FAIL.Code, OpcResult.FuncCallType.SysFuncCall, null), "The server is already connected.");
}
// save url.
SetUrl(url);
try
{
_factory.ForceDa20Usage = ForceDa20Usage;
// instantiate the server object.
_server = _factory.CreateInstance(url, connectData);
// save the connect data.
_connectData = connectData;
try
{
// cache the supported locales.
GetSupportedLocales();
// update the default locale.
SetLocale(_locale);
SupportedSpecifications = new List <OpcSpecification>();
#if (_OPCCLIENTSDK_DA)
if (_server is Com.Da20.Server)
{
SupportedSpecifications.Add(OpcSpecification.OPC_DA_20);
}
else if (_server is Com.Da.Server)
{
SupportedSpecifications.Add(OpcSpecification.OPC_DA_30);
SupportedSpecifications.Add(OpcSpecification.OPC_DA_20);
}
#endif
#if (_OPCCLIENTSDK_AE)
#if (_OPCCLIENTSDK_DA)
else if (_server is Com.Ae.Server)
#else
if (_server is Com.Ae.Server)
#endif
{
SupportedSpecifications.Add(OpcSpecification.OPC_AE_10);
}
#endif
#if (_OPCCLIENTSDK_HDA)
#if (_OPCCLIENTSDK_DA || _OPCCLIENTSDK_AE)
else if (_server is Com.Hda.Server)
#else
if (_server is Com.Hda.Server)
#endif
{
SupportedSpecifications.Add(OpcSpecification.OPC_HDA_10);
}
#endif
#if (_OPCCLIENTSDK_XMLDA)
else if (m_server is Xml.Da.Server)
{
SupportedSpecifications.Add(OpcSpecification.XML_DA_10);
}
#endif
#if (_OPCCLIENTSDK_XI)
else if (m_server is Xi.Server)
{
SupportedSpecifications.Add(OpcSpecification.OPC_XI_10);
}
#endif
}
catch (Exception e)
{
}
}
catch (Exception e)
{
if (_server != null)
{
try { Disconnect(); }
catch (Exception e1)
{
}
}
throw e;
}
}
/// <summary>
/// Contructs a server by de-serializing its OpcUrl from the stream.
/// </summary>
internal OpcServer(SerializationInfo info, StreamingContext context)
{
_serverName = info.GetString(Names.NAME);
_url = (OpcUrl)info.GetValue(Names.URL, typeof(OpcUrl));
_factory = (IOpcFactory)info.GetValue(Names.FACTORY, typeof(IOpcFactory));
}
/// <summary>
/// Updates the OpcUrl for the server.
/// </summary>
private void SetUrl(OpcUrl url)
{
if (url == null)
{
throw new ArgumentNullException("url");
}
// cannot change the OpcUrl if the remote server is already instantiated.
if (_server != null)
{
throw new OpcResultException(new OpcResult((int)OpcResult.E_FAIL.Code, OpcResult.FuncCallType.SysFuncCall, null), "The server is already connected.");
}
// copy the url.
_url = (OpcUrl)url.Clone();
// construct a name for the server.
string name = "";
// use the host name as a base.
if (_url.HostName != null)
{
name = _url.HostName.ToLower();
// suppress localhoat and loopback as explicit hostnames.
if (name == "localhost" || name == "127.0.0.1")
{
name = "";
}
}
// append the port.
if (_url.Port != 0)
{
name += String.Format(".{0}", _url.Port);
}
// add a separator.
if (name != "")
{
name += ".";
}
// use the prog id as the name.
if (_url.Scheme != OpcUrlScheme.HTTP)
{
string progID = _url.Path;
int index = progID.LastIndexOf('/');
if (index != -1)
{
progID = progID.Substring(0, index);
}
name += progID;
}
// use full path without the extension as the name.
else
{
string path = _url.Path;
// strip the file extension.
int index = path.LastIndexOf('.');
if (index != -1)
{
path = path.Substring(0, index);
}
// replace slashes with dashes.
while (path.IndexOf('/') != -1)
{
path = path.Replace('/', '-');
}
name += path;
}
// save the generated name in case the server name is not already set
if (String.IsNullOrEmpty(_serverName))
{
_serverName = name;
}
}
/// <summary>
/// Construct a server by de-serializing its OpcUrl from the stream.
/// </summary>
internal OpcServer(SerializationInfo info, StreamingContext context)
{
serverName_ = info.GetString(Names.Name);
opcUrl_ = (OpcUrl)info.GetValue(Names.Url, typeof(OpcUrl));
Factory = (IOpcFactory)info.GetValue(Names.Factory, typeof(IOpcFactory));
}
/// <summary>
/// Creates a new instance of the server.
/// </summary>
public virtual IOpcServer CreateInstance(OpcUrl url, OpcConnectData connectData)
{
IOpcServer server = (IOpcServer)Activator.CreateInstance(SystemType, new object[] { url, connectData });
return(server);
}
/// <summary>
/// Loads the configuration for the current server.
/// </summary>
private bool OnLoad(bool prompt, Technosoftware.DaAeHdaClient.OpcUrl url)
{
Stream stream = null;
try
{
Cursor = Cursors.WaitCursor;
// prompt user to select a configuration file.
if (prompt)
{
var dialog = new OpenFileDialog
{
CheckFileExists = true,
CheckPathExists = true,
DefaultExt = ".config",
Filter = "Config Files (*.config)|*.config|All Files (*.*)|*.*",
Multiselect = false,
ValidateNames = true,
Title = "Open Server Configuration File",
FileName = configFile_
};
if (dialog.ShowDialog() != DialogResult.OK)
{
return(false);
}
// save the new config file name.
configFile_ = dialog.FileName;
}
// disconnect from current server.
OnDisconnect();
// open configuration file.
stream = new FileStream(configFile_, FileMode.Open, FileAccess.Read, FileShare.Read);
// deserialize the server object.
server_ = (TsCHdaServer) new BinaryFormatter().Deserialize(stream);
// overrided default url.
if (url != null)
{
server_.Url = url;
}
// connect to new server.
OnConnect();
// load succeeded.
return(true);
}
catch (Exception e)
{
if (prompt)
{
MessageBox.Show(e.Message);
}
return(false);
}
finally
{
// close the stream.
if (stream != null)
{
stream.Close();
}
Cursor = Cursors.Default;
}
}
