static public void ListHDAServers(String node)
{
IDiscovery discovery = new OpcCom.ServerEnumerator();
Opc.Server[] servers;
try {
if (string.IsNullOrEmpty(node))
{
servers = discovery.GetAvailableServers(Specification.COM_HDA_10);
}
else
{
servers = discovery.GetAvailableServers(Specification.COM_HDA_10, node, null);
}
foreach (Opc.Server s in servers)
{
Console.WriteLine(s.Name);
}
} catch (System.Runtime.InteropServices.ExternalException e) {
Console.WriteLine("Error getting available servers: {0}", e.Message);
}
}
public static object Connect(URL url, ConnectData connectData)
{
string text = url.Path;
string text2 = null;
int num = url.Path.LastIndexOf('/');
if (num >= 0)
{
text = url.Path.Substring(0, num);
text2 = url.Path.Substring(num + 1);
}
Guid guid;
if (text2 == null)
{
guid = new ServerEnumerator().CLSIDFromProgID(text, url.HostName, connectData);
if (guid == Guid.Empty)
{
try
{
guid = new Guid(text);
}
catch
{
throw new ConnectFailedException(text);
}
}
}
else
{
try
{
guid = new Guid(text2);
}
catch
{
throw new ConnectFailedException(text2);
}
}
NetworkCredential credential = connectData?.GetCredential(null, null);
if (connectData == null || connectData.LicenseKey == null)
{
try
{
return(Interop.CreateInstance(guid, url.HostName, credential));
}
catch (Exception e)
{
throw new ConnectFailedException(e);
}
}
try
{
return(Interop.CreateInstanceWithLicenseKey(guid, url.HostName, credential, connectData.LicenseKey));
}
catch (Exception e2)
{
throw new ConnectFailedException(e2);
}
}
/// <summary>
/// Connects to the specified COM server server.
/// </summary>
public static object Connect(Opc.URL url, Opc.ConnectData connectData)
{
// parse path to find prog id and clsid.
string progID = url.Path;
string clsid = null;
int index = url.Path.LastIndexOf('/');
if (index >= 0)
{
progID = url.Path.Substring(0, index);
clsid = url.Path.Substring(index + 1);
}
// look up prog id if clsid not specified in the url.
Guid guid;
if (clsid == null)
{
// use OpcEnum to lookup the prog id.
guid = new ServerEnumerator().CLSIDFromProgID(progID, url.HostName, connectData);
// check if prog id is actually a clsid string.
if (guid == Guid.Empty)
{
try
{
guid = new Guid(progID);
}
catch
{
throw new Opc.ConnectFailedException(progID);
}
}
}
// convert clsid string to a guid.
else
{
try
{
guid = new Guid(clsid);
}
catch
{
throw new Opc.ConnectFailedException(clsid);
}
}
// get the credentials.
NetworkCredential credentials = (connectData != null)?connectData.GetCredential(null, null):null;
// instantiate the server using CoCreateInstanceEx.
if (connectData == null || connectData.LicenseKey == null)
{
try
{
return(OpcCom.Interop.CreateInstance(guid, url.HostName, credentials));
}
catch (Exception e)
{
throw new Opc.ConnectFailedException(e);
}
}
// instantiate the server using IClassFactory2.
else
{
try
{
return(OpcCom.Interop.CreateInstanceWithLicenseKey(guid, url.HostName, credentials, connectData.LicenseKey));
}
catch (Exception e)
{
throw new Opc.ConnectFailedException(e);
}
}
}
