public ServerNode(ServersTree owner, ServerDescription description)
{
Owner = owner;
Id = description.Id;
Name = description.ProgramId;
ServerName = description.Name;
IsExpanded = true;
Icon = "/Images/ServerOff.png";
}
/// <summary>
/// Returns an enumerator to allow to determine available OPC servers.
/// </summary>
/// <param name="categories">OPC Server categories (OPCDA/OPCHDA etc.)</param>
/// <returns>Enumerator to allow to determine available OPC servers.</returns>
public IEnumerable<ServerDescription> GetEnumerator(params Guid[] categories)
{
IEnumGUID enumerator = null;
IOPCEnumGUID opcEnumerator = null;
try
{
var tmp = Guid.Empty;
if(serverList2 != null)
serverList2.EnumClassesOfCategories(
(uint)categories.Length,
categories,
0,
ref tmp,
out opcEnumerator);
else
serverList.EnumClassesOfCategories(
(uint)categories.Length,
categories,
0,
ref tmp,
out enumerator);
while(true)
{
var res = 0;
uint fetched = 0;
var ids = new Guid[1];
if (opcEnumerator != null)
res = opcEnumerator.Next((uint)ids.Length, ids, out fetched);
else if (enumerator != null)
res = enumerator.Next(1, ids, out fetched);
if (res > 1)
Marshal.ThrowExceptionForHR(res);
if(fetched == 0)
break;
var id = ids[0];
ServerDescription serverDescription;
try
{
string name;
string programId;
var versionIndependentProgramId = string.Empty;
if (serverList2 != null)
serverList2.GetClassDetails(ref id, out programId, out name, out versionIndependentProgramId);
else
serverList.GetClassDetails(ref id, out programId, out name);
serverDescription = new ServerDescription(id, programId, versionIndependentProgramId, name);
}
catch(Exception e)
{
serverDescription = new ServerDescription(id, e);
}
yield return serverDescription;
}
}
finally
{
if(enumerator != null)
Marshal.ReleaseComObject(enumerator);
if(opcEnumerator != null)
Marshal.ReleaseComObject(opcEnumerator);
}
}
/// <summary>
/// Returns an enumerator to allow to determine available OPC servers.
/// </summary>
/// <param name="categories">OPC Server categories (OPCDA/OPCHDA etc.)</param>
/// <returns>Enumerator to allow to determine available OPC servers.</returns>
public IEnumerable <ServerDescription> GetEnumerator(params Guid[] categories)
{
IEnumGUID enumerator = null;
IOPCEnumGUID opcEnumerator = null;
try
{
var tmp = Guid.Empty;
if (serverList2 != null)
{
serverList2.EnumClassesOfCategories(
(uint)categories.Length,
categories,
0,
ref tmp,
out opcEnumerator);
}
else
{
serverList.EnumClassesOfCategories(
(uint)categories.Length,
categories,
0,
ref tmp,
out enumerator);
}
while (true)
{
var res = 0;
uint fetched = 0;
var ids = new Guid[1];
if (opcEnumerator != null)
{
res = opcEnumerator.Next((uint)ids.Length, ids, out fetched);
}
else if (enumerator != null)
{
res = enumerator.Next(1, ids, out fetched);
}
if (res > 1)
{
Marshal.ThrowExceptionForHR(res);
}
if (fetched == 0)
{
break;
}
var id = ids[0];
ServerDescription serverDescription;
try
{
string name;
string programId;
var versionIndependentProgramId = string.Empty;
if (serverList2 != null)
{
serverList2.GetClassDetails(ref id, out programId, out name, out versionIndependentProgramId);
}
else
{
serverList.GetClassDetails(ref id, out programId, out name);
}
serverDescription = new ServerDescription(id, programId, versionIndependentProgramId, name);
}
catch (Exception e)
{
serverDescription = new ServerDescription(id, e);
}
yield return(serverDescription);
}
}
finally
{
if (enumerator != null)
{
Marshal.ReleaseComObject(enumerator);
}
if (opcEnumerator != null)
{
Marshal.ReleaseComObject(opcEnumerator);
}
}
}