private int FetchElements(BrowseType browseType, int maxElements, UCOMIEnumString enumerator, ArrayList elements)
{
string[] rgelt = new string[1];
int celt = ((maxElements > 0) && ((maxElements - elements.Count) < rgelt.Length)) ? (maxElements - elements.Count) : rgelt.Length;
int pceltFetched = 0;
int num3 = enumerator.Next(celt, rgelt, out pceltFetched);
while (num3 == 0)
{
for (int i = 0; i < pceltFetched; i++)
{
BrowseElement element = new BrowseElement {
Name = rgelt[i],
QualifiedName = this.GetQualifiedName(rgelt[i], browseType),
NodeType = browseType
};
elements.Add(element);
}
if ((maxElements > 0) && (elements.Count >= maxElements))
{
return num3;
}
celt = ((maxElements > 0) && ((maxElements - elements.Count) < rgelt.Length)) ? (maxElements - elements.Count) : rgelt.Length;
num3 = enumerator.Next(celt, rgelt, out pceltFetched);
}
return num3;
}
public void BrowseAccessPaths(string p_ItemID, out UCOMIEnumString p_StringEnumerator)
{
object l_EnumTemp;
m_IfBrowse.BrowseAccessPaths(p_ItemID, out l_EnumTemp);
p_StringEnumerator = (UCOMIEnumString)l_EnumTemp;
}
// Address of the IEnumString pointer variable that receives the interface
// pointer to the enumeration object. If the method is unsuccessful, the
// value of this output variable is undefined.
/// <summary>
/// This method creates another enumerator that contains the same enumeration state as the current one.
/// Using this function, a client can record a particular point in the enumeration sequence and return to
/// that point at a later time. The new enumerator supports the same interface as the original one.
/// </summary>
public void Clone(
out UCOMIEnumString ppenum)
{
SourceCustomList clone = new SourceCustomList();
clone.currentPosition = currentPosition;
clone.StringList = (String[])StringList.Clone();
ppenum = clone;
}
public void BrowseAccessPaths(string itemID, out UCOMIEnumString stringEnumerator)
{
stringEnumerator = null;
object enumtemp;
ifBrowse.BrowseAccessPaths(itemID, out enumtemp);
stringEnumerator = (UCOMIEnumString)enumtemp;
enumtemp = null;
}
public override void Dispose()
{
base.Dispose();
if (this.m_enumerator != null)
{
OpcCom.Interop.ReleaseServer(this.m_enumerator);
this.m_enumerator = null;
}
}
/// <summary>
/// This method creates another enumerator that contains the same enumeration state as the current one.
/// Using this function, a client can record a particular point in the enumeration sequence and return to
/// that point at a later time. The new enumerator supports the same interface as the original one.
/// </summary>
public void Clone(
out UCOMIEnumString ppenum) // Address of the IEnumString pointer variable that receives the interface
// pointer to the enumeration object. If the method is unsuccessful, the
// value of this output variable is undefined.
{
SourceCustomList clone = new SourceCustomList();
clone.currentPosition = currentPosition;
clone.StringList = (String[])StringList.Clone();
ppenum = clone;
}
public void BrowseOPCItemIDs(OPCBROWSETYPE filterType, string filterCriteria,
VarEnum dataTypeFilter, OPCACCESSRIGHTS accessRightsFilter,
out UCOMIEnumString stringEnumerator)
{
stringEnumerator = null;
object enumtemp;
ifBrowse.BrowseOPCItemIDs(filterType, filterCriteria, (short)dataTypeFilter, accessRightsFilter, out enumtemp);
stringEnumerator = (UCOMIEnumString)enumtemp;
enumtemp = null;
}
private void listItems(OPCBROWSETYPE type, out List <string> items, out List <string> paths)
{
string szFilter = "";
items = new List <string>();
paths = new List <string>();
int m_Res;
m_Res = 0;
object pIEnumString;
m_Res = m_pIBrowse.BrowseOPCItemIDs(type, szFilter, (int)VarEnum.VT_EMPTY, 0, out pIEnumString);
if (m_Res >= 0 && pIEnumString != null)
{
if (pIEnumString is UCOMIEnumString)
{
int celt = 1;
string[] rgelt = new string[1];
int p_celtFetched = 0;
UCOMIEnumString stringArray = (UCOMIEnumString)pIEnumString;
stringArray.Reset();
int ret = stringArray.Next(celt, rgelt, out p_celtFetched);
while (p_celtFetched > 0)
{
string path = getFullPath(rgelt[0]);
items.Add(rgelt[0]);
paths.Add(path);
celt = 1;
p_celtFetched = 0;
stringArray.Next(celt, rgelt, out p_celtFetched);
}
}
else
{
throw new Exception("Browser: IEnumString is not found.");
}
}
else
{
throw new Exception("Browser: Enumeration Items error.");
}
}
public BrowseElement[] Browse(string areaID, BrowseType browseType, string browseFilter, int maxElements, out IBrowsePosition position)
{
position = null;
lock (this)
{
if (base.m_server == null)
{
throw new NotConnectedException();
}
this.InitializeBrowser();
this.ChangeBrowsePosition(areaID);
UCOMIEnumString enumerator = (UCOMIEnumString) this.CreateEnumerator(browseType, browseFilter);
ArrayList elements = new ArrayList();
if (this.FetchElements(browseType, maxElements, enumerator, elements) != 0)
{
OpcCom.Interop.ReleaseServer(enumerator);
}
else
{
position = new OpcCom.Ae.BrowsePosition(areaID, browseType, browseFilter, enumerator);
}
return (BrowseElement[]) elements.ToArray(typeof(BrowseElement));
}
}
public BrowseElement[] BrowseNext(int maxElements, ref IBrowsePosition position)
{
lock (this)
{
if (base.m_server == null)
{
throw new NotConnectedException();
}
if (position == null)
{
throw new ArgumentNullException("position");
}
this.InitializeBrowser();
this.ChangeBrowsePosition(((OpcCom.Ae.BrowsePosition) position).AreaID);
UCOMIEnumString enumerator = ((OpcCom.Ae.BrowsePosition) position).Enumerator;
ArrayList elements = new ArrayList();
if (this.FetchElements(((OpcCom.Ae.BrowsePosition) position).BrowseType, maxElements, enumerator, elements) != 0)
{
position.Dispose();
position = null;
}
return (BrowseElement[]) elements.ToArray(typeof(BrowseElement));
}
}
public void BrowseOPCItemIDs(OPCBrowseType p_FilterType, string p_FilterCriteria,
VarEnum p_DataTypeFilter, OPCAccessRights p_AccessRightsFilter, out UCOMIEnumString p_StringEnumerator)
{
object l_EnumTemp;
m_IfBrowse.BrowseOPCItemIDs(p_FilterType, p_FilterCriteria, (short)p_DataTypeFilter, p_AccessRightsFilter, out l_EnumTemp);
p_StringEnumerator = (UCOMIEnumString)l_EnumTemp;
}
public int GetZoneMappings(Interop.URLZONE dwZone, out UCOMIEnumString ppenumString, uint dwFlags)
{
ppenumString = null;
return(Interop.INET_E_DEFAULT_ACTION);
}
public void BrowseOPCItemIDs( OPCBROWSETYPE filterType, string filterCriteria,
VarEnum dataTypeFilter, OPCACCESSRIGHTS accessRightsFilter,
out UCOMIEnumString stringEnumerator)
{
stringEnumerator = null;
object enumtemp;
ifBrowse.BrowseOPCItemIDs( filterType, filterCriteria, (short) dataTypeFilter, accessRightsFilter, out enumtemp );
stringEnumerator = (UCOMIEnumString) enumtemp;
enumtemp = null;
}
public void BrowseAccessPaths( string itemID, out UCOMIEnumString stringEnumerator )
{
stringEnumerator = null;
object enumtemp;
ifBrowse.BrowseAccessPaths( itemID, out enumtemp );
stringEnumerator = (UCOMIEnumString) enumtemp;
enumtemp = null;
}
public BrowsePosition(string areaID, BrowseType browseType, string browseFilter, UCOMIEnumString enumerator) : base(areaID, browseType, browseFilter)
{
this.m_enumerator = null;
this.m_enumerator = enumerator;
}
