/// <summary>
/// Метод для поиска всех тегов на ОРС сервере
/// </summary>
/// <param name="itemName"></param>
public void Browse(string itemName = "")
{
var itemIdentifier = new Opc.ItemIdentifier();
itemIdentifier.ItemName = itemName;
var browseFilters = new Opc.Da.BrowseFilters();
browseFilters.BrowseFilter = browseFilter.all;
var browsePosition = new Opc.Da.BrowsePosition(itemIdentifier, browseFilters);
BrowseElement[] browseElements = serverHandle.Browse(itemIdentifier, browseFilters, out browsePosition);
if (browseElements != null)
{
foreach (BrowseElement element in browseElements)
{
if (element.IsItem)
{
Console.WriteLine("Item name : {0}", element.ItemName);
}
else
{
Console.WriteLine();
Console.WriteLine("Group name : {0}", element.ItemName);
Browse(element.ItemName);
}
}
}
}
/// <summary>
/// Вспомогательный метод для инициализации списка тегов с сервера.
/// Вызывается при соединении с сервером
/// </summary>
/// <param name="itemName"></param>
void InitTagList(string itemName = "")
{
var itemIdentifier = new Opc.ItemIdentifier();
itemIdentifier.ItemName = itemName;
var browseFilters = new Opc.Da.BrowseFilters();
browseFilters.BrowseFilter = browseFilter.all;
var browsePosition = new Opc.Da.BrowsePosition(itemIdentifier, browseFilters);
BrowseElement[] browseElements = serverHandle.Browse(itemIdentifier, browseFilters, out browsePosition);
if (browseElements != null)
{
foreach (BrowseElement element in browseElements)
{
if (element.IsItem)
{
var item = new Opc.Da.Item
{
ItemName = element.ItemName
};
tagList.Add(item);
}
else
{
InitTagList(element.ItemName);
}
}
}
}
/// <summary>
/// Метод рекурсивного поиска тегов в UA структурах и добавление их в disoveredTags
/// </summary>
/// <param name="id">объект который надо просканировать</param>
private int Browse(Opc.ItemIdentifier id = null)
{
try
{
var filters = new Opc.Da.BrowseFilters {
BrowseFilter = Opc.Da.browseFilter.all
};
Opc.Da.BrowsePosition pos = null;
var elements = server.Browse(id, filters, out pos);
if (elements != null)
{
foreach (Opc.Da.BrowseElement element in elements)
{
if (element.IsItem)
{
_tags.Add(new Opc.Da.Item {
ItemName = element.ItemName
});
}
if (element.HasChildren)
{
Browse(new Opc.ItemIdentifier(element.ItemPath, element.ItemName));
}
}
}
return(0);
}
catch (Exception ex)
{
return(-1);
}
}
// Token: 0x06000049 RID: 73 RVA: 0x000035E4 File Offset: 0x000025E4
public BrowseElement[] Browse(ItemIdentifier itemID, BrowseFilters filters, out BrowsePosition position)
{
if (this.m_server == null)
{
throw new NotConnectedException();
}
return(((IServer)this.m_server).Browse(itemID, filters, out position));
}
//======================================================================
// BrowseNext
/// <summary>
/// Continues a browse operation with previously specified search criteria.
/// </summary>
/// <param name="position">An object containing the browse operation state information.</param>
/// <returns>The set of elements found.</returns>
public BrowseElement[] BrowseNext(ref BrowsePosition position)
{
if (m_server == null)
{
throw new NotConnectedException();
}
return(((IServer)m_server).BrowseNext(ref position));
}
//======================================================================
// BrowseNext
/// <summary>
/// Continues a browse operation with previously specified search criteria.
/// </summary>
/// <param name="position">An object containing the browse operation state information.</param>
/// <returns>The set of elements found.</returns>
public Opc.Da.BrowseElement[] BrowseNext(ref Opc.Da.BrowsePosition position)
{
if (position == null)
{
throw new ArgumentNullException("position");
}
lock (this)
{
return(m_cache.Browse(position.ItemID, position.Filters, ref position));
}
}
//======================================================================
// Browse
/// <summary>
/// Fetches the children of a branch that meet the filter criteria.
/// </summary>
/// <param name="itemID">The identifier of branch which is the target of the search.</param>
/// <param name="filters">The filters to use to limit the set of child elements returned.</param>
/// <param name="position">An object used to continue a browse that could not be completed.</param>
/// <returns>The set of elements found.</returns>
public Opc.Da.BrowseElement[] Browse(
ItemIdentifier itemID,
BrowseFilters filters,
out Opc.Da.BrowsePosition position)
{
position = null;
lock (this)
{
return(m_cache.Browse(itemID, filters, ref position));
}
}
//======================================================================
// Browse
/// <summary>
/// Fetches the children of a branch that meet the filter criteria.
/// </summary>
/// <param name="itemID">The identifier of branch which is the target of the search.</param>
/// <param name="filters">The filters to use to limit the set of child elements returned.</param>
/// <param name="position">An object used to continue a browse that could not be completed.</param>
/// <returns>The set of elements found.</returns>
public BrowseElement[] Browse(
ItemIdentifier itemID,
BrowseFilters filters,
out Opc.Da.BrowsePosition position)
{
position = null;
lock (this)
{
if (m_proxy == null)
{
throw new NotConnectedException();
}
// use default filters if none specified.
if (filters == null)
{
filters = new BrowseFilters();
}
BrowsePosition pos = new BrowsePosition(itemID, filters, m_options.Locale, ((m_options.Filters & (int)ResultFilter.ErrorText) != 0));
OpcXml.Da10.BrowseElement[] elements = null;
OpcXml.Da10.OPCError[] errors = null;
OpcXml.Da10.ReplyBase reply = m_proxy.Browse(
OpcXml.Da10.Request.GetPropertyNames(filters.PropertyIDs),
pos.Locale,
"",
(itemID != null)?itemID.ItemPath:null,
(itemID != null)?itemID.ItemName:null,
ref pos.ContinuationPoint,
filters.MaxElementsReturned,
OpcXml.Da10.Request.GetBrowseFilter(filters.BrowseFilter),
filters.ElementNameFilter,
filters.VendorFilter,
filters.ReturnAllProperties,
filters.ReturnPropertyValues,
pos.ReturnErrorText,
out elements,
out errors,
out pos.MoreElements);
CacheResponse(pos.Locale, reply, errors);
if (pos.MoreElements || (pos.ContinuationPoint != null && pos.ContinuationPoint != ""))
{
position = pos;
}
return(OpcXml.Da10.Request.GetBrowseElements(elements));
}
}
//======================================================================
// BrowseNext
/// <summary>
/// Continues a browse operation with previously specified search criteria.
/// </summary>
/// <param name="position">An object containing the browse operation state information.</param>
/// <returns>The set of elements found.</returns>
public BrowseElement[] BrowseNext(ref Opc.Da.BrowsePosition position)
{
if (position == null)
{
throw new ArgumentNullException("position");
}
if (m_proxy == null)
{
throw new NotConnectedException();
}
lock (this)
{
BrowsePosition pos = (BrowsePosition)position;
if (pos.ContinuationPoint == null || pos.ContinuationPoint == "")
{
throw new BrowseCannotContinueException();
}
OpcXml.Da10.BrowseElement[] elements = null;
OpcXml.Da10.OPCError[] errors = null;
OpcXml.Da10.ReplyBase reply = m_proxy.Browse(
OpcXml.Da10.Request.GetPropertyNames(pos.Filters.PropertyIDs),
pos.Locale,
"",
(pos.ItemID != null)?pos.ItemID.ItemPath:null,
(pos.ItemID != null)?pos.ItemID.ItemName:null,
ref pos.ContinuationPoint,
pos.Filters.MaxElementsReturned,
OpcXml.Da10.Request.GetBrowseFilter(pos.Filters.BrowseFilter),
pos.Filters.ElementNameFilter,
pos.Filters.VendorFilter,
pos.Filters.ReturnAllProperties,
pos.Filters.ReturnPropertyValues,
pos.ReturnErrorText,
out elements,
out errors,
out pos.MoreElements);
CacheResponse(pos.Locale, reply, errors);
position = null;
if (pos.MoreElements || (pos.ContinuationPoint != null && pos.ContinuationPoint != ""))
{
position = pos;
}
return(OpcXml.Da10.Request.GetBrowseElements(elements));
}
}
private bool BuildBrowseStack(ItemIdentifier itemID, ItemIdentifier targetID)
{
BrowseFilters filters = new BrowseFilters {
MaxElementsReturned = 0,
BrowseFilter = browseFilter.all,
ElementNameFilter = null,
VendorFilter = null,
ReturnAllProperties = false,
PropertyIDs = null,
ReturnPropertyValues = false
};
BrowseElement[] elementArray = null;
Opc.Da.BrowsePosition position = null;
try
{
elementArray = this.m_server.Browse(itemID, filters, out position);
}
catch (Exception)
{
this.m_browseStack.Clear();
return(false);
}
if (position != null)
{
position.Dispose();
position = null;
}
if ((elementArray == null) || (elementArray.Length == 0))
{
this.m_browseStack.Clear();
return(false);
}
foreach (BrowseElement element in elementArray)
{
if (element.ItemName == targetID.ItemName)
{
return(true);
}
if (targetID.ItemName.StartsWith(element.ItemName))
{
ItemIdentifier identifier = new ItemIdentifier(targetID.ItemName);
this.m_browseStack.Push(identifier);
return(this.BuildBrowseStack(identifier, targetID));
}
}
return(false);
}
public virtual BrowseElement[] BrowseNext(ref Opc.Da.BrowsePosition position)
{
lock (this)
{
if (m_server == null)
{
throw new NotConnectedException();
}
if (position == null || (object)position.GetType() != typeof(BrowsePosition))
{
throw new BrowseCannotContinueException();
}
BrowsePosition browsePosition = (BrowsePosition)position;
if (browsePosition == null || browsePosition.ContinuationPoint == null || browsePosition.ContinuationPoint == "")
{
throw new BrowseCannotContinueException();
}
int pdwCount = 0;
int pbMoreElements = 0;
ItemIdentifier itemID = ((BrowsePosition)position).ItemID;
BrowseFilters filters = ((BrowsePosition)position).Filters;
IntPtr pszContinuationPoint = Marshal.StringToCoTaskMemUni(browsePosition.ContinuationPoint);
IntPtr ppBrowseElements = IntPtr.Zero;
try
{
((IOPCBrowse)m_server).Browse((itemID != null && itemID.ItemName != null) ? itemID.ItemName : "", ref pszContinuationPoint, filters.MaxElementsReturned, Interop.GetBrowseFilter(filters.BrowseFilter), (filters.ElementNameFilter != null) ? filters.ElementNameFilter : "", (filters.VendorFilter != null) ? filters.VendorFilter : "", filters.ReturnAllProperties ? 1 : 0, filters.ReturnPropertyValues ? 1 : 0, (filters.PropertyIDs != null) ? filters.PropertyIDs.Length : 0, Interop.GetPropertyIDs(filters.PropertyIDs), out pbMoreElements, out pdwCount, out ppBrowseElements);
}
catch (Exception e)
{
throw OpcCom.Interop.CreateException("IOPCBrowse.BrowseNext", e);
}
BrowseElement[] browseElements = Interop.GetBrowseElements(ref ppBrowseElements, pdwCount, deallocate: true);
browsePosition.ContinuationPoint = Marshal.PtrToStringUni(pszContinuationPoint);
Marshal.FreeCoTaskMem(pszContinuationPoint);
if (pbMoreElements == 0 && (browsePosition.ContinuationPoint == null || browsePosition.ContinuationPoint == ""))
{
position = null;
}
ProcessResults(browseElements, filters.PropertyIDs);
return(browseElements);
}
}
public override BrowseElement[] BrowseNext(ref Opc.Da.BrowsePosition position)
{
lock (this)
{
if (m_server == null)
{
throw new NotConnectedException();
}
if (position == null && (object)position.GetType() != typeof(BrowsePosition))
{
throw new BrowseCannotContinueException();
}
BrowsePosition position2 = (BrowsePosition)position;
ItemIdentifier itemID = position2.ItemID;
BrowseFilters filters = position2.Filters;
ArrayList arrayList = new ArrayList();
if (position2.IsBranch)
{
BrowseElement[] elements = GetElements(arrayList.Count, itemID, filters, branches: true, ref position2);
if (elements != null)
{
arrayList.AddRange(elements);
}
position = position2;
if (position != null)
{
return((BrowseElement[])arrayList.ToArray(typeof(BrowseElement)));
}
}
if (filters.BrowseFilter != browseFilter.branch)
{
BrowseElement[] elements2 = GetElements(arrayList.Count, itemID, filters, branches: false, ref position2);
if (elements2 != null)
{
arrayList.AddRange(elements2);
}
position = position2;
}
return((BrowseElement[])arrayList.ToArray(typeof(BrowseElement)));
}
}
public virtual BrowseElement[] BrowseNext(ref Opc.Da.BrowsePosition position)
{
lock (this)
{
if (base.m_server == null)
{
throw new NotConnectedException();
}
if ((position == null) || (position.GetType() != typeof(OpcCom.Da.BrowsePosition)))
{
throw new BrowseCannotContinueException();
}
OpcCom.Da.BrowsePosition position2 = (OpcCom.Da.BrowsePosition)position;
if (((position2 == null) || (position2.ContinuationPoint == null)) || (position2.ContinuationPoint == ""))
{
throw new BrowseCannotContinueException();
}
int pdwCount = 0;
int pbMoreElements = 0;
ItemIdentifier itemID = ((OpcCom.Da.BrowsePosition)position).ItemID;
BrowseFilters filters = ((OpcCom.Da.BrowsePosition)position).Filters;
IntPtr pszContinuationPoint = Marshal.StringToCoTaskMemUni(position2.ContinuationPoint);
IntPtr zero = IntPtr.Zero;
try
{
((IOPCBrowse)base.m_server).Browse(((itemID != null) && (itemID.ItemName != null)) ? itemID.ItemName : "", ref pszContinuationPoint, filters.MaxElementsReturned, OpcCom.Da.Interop.GetBrowseFilter(filters.BrowseFilter), (filters.ElementNameFilter != null) ? filters.ElementNameFilter : "", (filters.VendorFilter != null) ? filters.VendorFilter : "", filters.ReturnAllProperties ? 1 : 0, filters.ReturnPropertyValues ? 1 : 0, (filters.PropertyIDs != null) ? filters.PropertyIDs.Length : 0, OpcCom.Da.Interop.GetPropertyIDs(filters.PropertyIDs), out pbMoreElements, out pdwCount, out zero);
}
catch (Exception exception)
{
throw OpcCom.Interop.CreateException("IOPCBrowse.BrowseNext", exception);
}
BrowseElement[] elements = OpcCom.Da.Interop.GetBrowseElements(ref zero, pdwCount, true);
position2.ContinuationPoint = Marshal.PtrToStringUni(pszContinuationPoint);
Marshal.FreeCoTaskMem(pszContinuationPoint);
if ((pbMoreElements == 0) && ((position2.ContinuationPoint == null) || (position2.ContinuationPoint == "")))
{
position = null;
}
this.ProcessResults(elements, filters.PropertyIDs);
return(elements);
}
}
public override BrowseElement[] BrowseNext(ref Opc.Da.BrowsePosition position)
{
lock (this)
{
if (base.m_server == null)
{
throw new NotConnectedException();
}
if ((position == null) && (position.GetType() != typeof(OpcCom.Da20.BrowsePosition)))
{
throw new BrowseCannotContinueException();
}
OpcCom.Da20.BrowsePosition position2 = (OpcCom.Da20.BrowsePosition)position;
ItemIdentifier itemID = position2.ItemID;
BrowseFilters filters = position2.Filters;
ArrayList list = new ArrayList();
if (position2.IsBranch)
{
BrowseElement[] c = this.GetElements(list.Count, itemID, filters, true, ref position2);
if (c != null)
{
list.AddRange(c);
}
position = position2;
if (position != null)
{
return((BrowseElement[])list.ToArray(typeof(BrowseElement)));
}
}
if (filters.BrowseFilter != browseFilter.branch)
{
BrowseElement[] elementArray2 = this.GetElements(list.Count, itemID, filters, false, ref position2);
if (elementArray2 != null)
{
list.AddRange(elementArray2);
}
position = position2;
}
return((BrowseElement[])list.ToArray(typeof(BrowseElement)));
}
}
private BrowseElement FindChild(string name)
{
ItemIdentifier itemID = null;
if (this.m_browseStack.Count > 0)
{
itemID = (ItemIdentifier)this.m_browseStack.Peek();
}
BrowseElement[] elementArray = null;
try
{
BrowseFilters filters = new BrowseFilters {
MaxElementsReturned = 0,
BrowseFilter = browseFilter.all,
ElementNameFilter = name,
VendorFilter = null,
ReturnAllProperties = false,
PropertyIDs = null,
ReturnPropertyValues = false
};
Opc.Da.BrowsePosition position = null;
elementArray = this.m_server.Browse(itemID, filters, out position);
if (position != null)
{
position.Dispose();
position = null;
}
}
catch (Exception)
{
return(null);
}
if ((elementArray != null) && (elementArray.Length > 0))
{
return(elementArray[0]);
}
return(null);
}
public virtual BrowseElement[] Browse(ItemIdentifier itemID, BrowseFilters filters, out Opc.Da.BrowsePosition position)
{
if (filters == null)
{
throw new ArgumentNullException("filters");
}
lock (this)
{
if (m_server == null)
{
throw new NotConnectedException();
}
position = null;
int pdwCount = 0;
int pbMoreElements = 0;
IntPtr pszContinuationPoint = IntPtr.Zero;
IntPtr ppBrowseElements = IntPtr.Zero;
try
{
((IOPCBrowse)m_server).Browse((itemID != null && itemID.ItemName != null) ? itemID.ItemName : "", ref pszContinuationPoint, filters.MaxElementsReturned, Interop.GetBrowseFilter(filters.BrowseFilter), (filters.ElementNameFilter != null) ? filters.ElementNameFilter : "", (filters.VendorFilter != null) ? filters.VendorFilter : "", filters.ReturnAllProperties ? 1 : 0, filters.ReturnPropertyValues ? 1 : 0, (filters.PropertyIDs != null) ? filters.PropertyIDs.Length : 0, Interop.GetPropertyIDs(filters.PropertyIDs), out pbMoreElements, out pdwCount, out ppBrowseElements);
}
catch (Exception e)
{
throw OpcCom.Interop.CreateException("IOPCBrowse.Browse", e);
}
BrowseElement[] browseElements = Interop.GetBrowseElements(ref ppBrowseElements, pdwCount, deallocate: true);
string text = Marshal.PtrToStringUni(pszContinuationPoint);
Marshal.FreeCoTaskMem(pszContinuationPoint);
if (pbMoreElements != 0 || (text != null && text != ""))
{
position = new BrowsePosition(itemID, filters, text);
}
ProcessResults(browseElements, filters.PropertyIDs);
return(browseElements);
}
}
public virtual BrowseElement[] Browse(ItemIdentifier itemID, BrowseFilters filters, out Opc.Da.BrowsePosition position)
{
if (filters == null)
{
throw new ArgumentNullException("filters");
}
lock (this)
{
if (base.m_server == null)
{
throw new NotConnectedException();
}
position = null;
int pdwCount = 0;
int pbMoreElements = 0;
IntPtr zero = IntPtr.Zero;
IntPtr ppBrowseElements = IntPtr.Zero;
try
{
((IOPCBrowse)base.m_server).Browse(((itemID != null) && (itemID.ItemName != null)) ? itemID.ItemName : "", ref zero, filters.MaxElementsReturned, OpcCom.Da.Interop.GetBrowseFilter(filters.BrowseFilter), (filters.ElementNameFilter != null) ? filters.ElementNameFilter : "", (filters.VendorFilter != null) ? filters.VendorFilter : "", filters.ReturnAllProperties ? 1 : 0, filters.ReturnPropertyValues ? 1 : 0, (filters.PropertyIDs != null) ? filters.PropertyIDs.Length : 0, OpcCom.Da.Interop.GetPropertyIDs(filters.PropertyIDs), out pbMoreElements, out pdwCount, out ppBrowseElements);
}
catch (Exception exception)
{
throw OpcCom.Interop.CreateException("IOPCBrowse.Browse", exception);
}
BrowseElement[] elements = OpcCom.Da.Interop.GetBrowseElements(ref ppBrowseElements, pdwCount, true);
string continuationPoint = Marshal.PtrToStringUni(zero);
Marshal.FreeCoTaskMem(zero);
if ((pbMoreElements != 0) || ((continuationPoint != null) && (continuationPoint != "")))
{
position = new OpcCom.Da.BrowsePosition(itemID, filters, continuationPoint);
}
this.ProcessResults(elements, filters.PropertyIDs);
return(elements);
}
}
/// <summary>
/// Returns the set of elements in the address space that meet the specified criteria.
/// </summary>
public Opc.Da.BrowseElement[] Browse(
ItemIdentifier itemID,
BrowseFilters filters,
ref Opc.Da.BrowsePosition position)
{
lock (this)
{
if (m_disposed)
{
throw new ObjectDisposedException("Opc.Da.Cache");
}
BrowseElement element = m_addressSpace;
// find desired element.
string browsePath = (itemID != null) ? itemID.ItemName : null;
if (browsePath != null && browsePath.Length > 0)
{
element = m_addressSpace.Find(browsePath);
if (element == null)
{
// check if browsing a property item.
PropertyID property = Property.VALUE;
string rootID = LookupProperty(browsePath, out property);
if (rootID != null)
{
element = m_addressSpace.Find(rootID);
}
if (element == null)
{
throw new ResultIDException(ResultID.Da.E_UNKNOWN_ITEM_NAME);
}
// property items never contain children.
return(new Opc.Da.BrowseElement[0]);
}
}
// check if no elements exist.
if (element.Count == 0)
{
return(new Opc.Da.BrowseElement[0]);
}
// determine start position.
int start = 0;
if (position != null)
{
start = ((BrowsePosition)position).Index;
position.Dispose();
position = null;
}
// process child nodes.
ArrayList results = new ArrayList();
for (int ii = start; ii < element.Count; ii++)
{
BrowseElement child = element.Child(ii);
// exclude elements without children.
if (filters.BrowseFilter == browseFilter.branch && child.Count == 0)
{
continue;
}
// check if an element is an item.
CacheItem item = (CacheItem)m_items[child.ItemID];
// exclude elements which are not items.
if (filters.BrowseFilter == browseFilter.item && item == null)
{
continue;
}
// apply name filter (using the SQL LIKE operator).
if (filters.ElementNameFilter != null && filters.ElementNameFilter.Length > 0)
{
if (!Opc.Convert.Match(child.Name, filters.ElementNameFilter, true))
{
continue;
}
}
// add element to list of results.
Opc.Da.BrowseElement result = new Opc.Da.BrowseElement();
result.Name = child.Name;
result.ItemName = child.ItemID;
result.ItemPath = null;
result.IsItem = item != null;
result.HasChildren = child.Count > 0;
result.Properties = null;
// add properties to results.
if (filters.ReturnAllProperties || filters.PropertyIDs != null)
{
result.Properties = GetProperties(item, (filters.ReturnAllProperties) ? null : filters.PropertyIDs, filters.ReturnPropertyValues);
}
results.Add(result);
// check if max elements exceeded.
if (filters.MaxElementsReturned > 0 && results.Count >= filters.MaxElementsReturned)
{
if (ii + 1 < element.Count)
{
position = new BrowsePosition(itemID, filters);
((BrowsePosition)position).Index = ii + 1;
}
break;
}
}
// return results.
return((Opc.Da.BrowseElement[])results.ToArray(typeof(Opc.Da.BrowseElement)));
}
}
public override BrowseElement[] Browse(ItemIdentifier itemID, BrowseFilters filters, out Opc.Da.BrowsePosition position)
{
if (filters == null)
{
throw new ArgumentNullException("filters");
}
position = null;
lock (this)
{
if (m_server == null)
{
throw new NotConnectedException();
}
BrowsePosition position2 = null;
ArrayList arrayList = new ArrayList();
if (filters.BrowseFilter != browseFilter.item)
{
BrowseElement[] elements = GetElements(arrayList.Count, itemID, filters, branches: true, ref position2);
if (elements != null)
{
arrayList.AddRange(elements);
}
position = position2;
if (position != null)
{
return((BrowseElement[])arrayList.ToArray(typeof(BrowseElement)));
}
}
if (filters.BrowseFilter != browseFilter.branch)
{
BrowseElement[] elements2 = GetElements(arrayList.Count, itemID, filters, branches: false, ref position2);
if (elements2 != null)
{
arrayList.AddRange(elements2);
}
position = position2;
}
return((BrowseElement[])arrayList.ToArray(typeof(BrowseElement)));
}
}
//======================================================================
// Browse
/// <summary>
/// Fetches the children of a branch that meet the filter criteria.
/// </summary>
/// <param name="itemID">The identifier of branch which is the target of the search.</param>
/// <param name="filters">The filters to use to limit the set of child elements returned.</param>
/// <param name="position">An object used to continue a browse that could not be completed.</param>
/// <returns>The set of elements found.</returns>
public virtual BrowseElement[] Browse(
ItemIdentifier itemID,
BrowseFilters filters,
out Opc.Da.BrowsePosition position)
{
if (filters == null)
{
throw new ArgumentNullException("filters");
}
lock (this)
{
if (m_server == null)
{
throw new NotConnectedException();
}
position = null;
// initialize arguments.
int count = 0;
int moreElements = 0;
IntPtr pContinuationPoint = IntPtr.Zero;
IntPtr pElements = IntPtr.Zero;
// invoke COM method.
try
{
((IOPCBrowse)m_server).Browse(
(itemID != null && itemID.ItemName != null)?itemID.ItemName:"",
ref pContinuationPoint,
filters.MaxElementsReturned,
OpcCom.Da.Interop.GetBrowseFilter(filters.BrowseFilter),
(filters.ElementNameFilter != null)?filters.ElementNameFilter:"",
(filters.VendorFilter != null)?filters.VendorFilter:"",
(filters.ReturnAllProperties)?1:0,
(filters.ReturnPropertyValues)?1:0,
(filters.PropertyIDs != null)?filters.PropertyIDs.Length:0,
OpcCom.Da.Interop.GetPropertyIDs(filters.PropertyIDs),
out moreElements,
out count,
out pElements);
}
catch (Exception e)
{
throw OpcCom.Interop.CreateException("IOPCBrowse.Browse", e);
}
// unmarshal results.
BrowseElement[] elements = OpcCom.Da.Interop.GetBrowseElements(ref pElements, count, true);
string continuationPoint = Marshal.PtrToStringUni(pContinuationPoint);
Marshal.FreeCoTaskMem(pContinuationPoint);
// check if more results exist.
if (moreElements != 0 || (continuationPoint != null && continuationPoint != ""))
{
// allocate new browse position object.
position = new OpcCom.Da.BrowsePosition(itemID, filters, continuationPoint);
}
// process results.
ProcessResults(elements, filters.PropertyIDs);
return(elements);
}
}
private void Browse(ItemIdentifier itemID, OPCBROWSETYPE dwBrowseFilterType, string szFilterCriteria, short vtDataTypeFilter, int dwAccessRightsFilter, ArrayList hits)
{
BrowseFilters filters = new BrowseFilters {
MaxElementsReturned = 0,
BrowseFilter = browseFilter.all,
ElementNameFilter = (dwBrowseFilterType != OPCBROWSETYPE.OPC_FLAT) ? szFilterCriteria : "",
VendorFilter = null,
ReturnAllProperties = false
};
filters.PropertyIDs = new PropertyID[] { Property.DATATYPE, Property.ACCESSRIGHTS };
filters.ReturnPropertyValues = true;
BrowseElement[] elementArray = null;
try
{
Opc.Da.BrowsePosition position = null;
elementArray = this.m_server.Browse(itemID, filters, out position);
if (position != null)
{
position.Dispose();
position = null;
}
}
catch
{
throw new ExternalException("BrowseOPCItemIDs", -2147467259);
}
foreach (BrowseElement element in elementArray)
{
if (dwBrowseFilterType == OPCBROWSETYPE.OPC_FLAT)
{
if (element.HasChildren)
{
this.Browse(new ItemIdentifier(element.ItemName), dwBrowseFilterType, szFilterCriteria, vtDataTypeFilter, dwAccessRightsFilter, hits);
}
}
else
{
if (dwBrowseFilterType == OPCBROWSETYPE.OPC_BRANCH)
{
if (element.HasChildren)
{
goto Label_00F9;
}
continue;
}
if ((dwBrowseFilterType == OPCBROWSETYPE.OPC_LEAF) && element.HasChildren)
{
continue;
}
}
Label_00F9:
if (element.IsItem)
{
if (vtDataTypeFilter != 0)
{
short type = (short)OpcCom.Interop.GetType((System.Type)element.Properties[0].Value);
if (type != vtDataTypeFilter)
{
continue;
}
}
if (dwAccessRightsFilter != 0)
{
accessRights rights = (accessRights)element.Properties[1].Value;
if (((dwAccessRightsFilter == 1) && (rights == accessRights.writable)) || ((dwAccessRightsFilter == 2) && (rights == accessRights.readable)))
{
continue;
}
}
}
if (dwBrowseFilterType != OPCBROWSETYPE.OPC_FLAT)
{
hits.Add(element.Name);
}
else if (element.IsItem && ((szFilterCriteria.Length == 0) || Opc.Convert.Match(element.ItemName, szFilterCriteria, true)))
{
hits.Add(element.ItemName);
}
}
}
public void ChangeBrowsePosition(OPCBROWSEDIRECTION dwBrowseDirection, string szString)
{
OpcCom.Da.Wrapper.Server server;
Monitor.Enter(server = this);
try
{
BrowseElement element;
BrowseFilters filters = new BrowseFilters {
MaxElementsReturned = 0,
BrowseFilter = browseFilter.all,
ElementNameFilter = null,
VendorFilter = null,
ReturnAllProperties = false,
PropertyIDs = null,
ReturnPropertyValues = false
};
ItemIdentifier itemID = null;
Opc.Da.BrowsePosition position = null;
switch (dwBrowseDirection)
{
case OPCBROWSEDIRECTION.OPC_BROWSE_UP:
if (this.m_browseStack.Count == 0)
{
throw CreateException(-2147467259);
}
goto Label_0146;
case OPCBROWSEDIRECTION.OPC_BROWSE_DOWN:
if ((szString == null) || (szString.Length == 0))
{
throw CreateException(-2147024809);
}
goto Label_00F4;
case OPCBROWSEDIRECTION.OPC_BROWSE_TO:
if ((szString != null) && (szString.Length != 0))
{
break;
}
this.m_browseStack.Clear();
goto Label_0179;
default:
goto Label_0179;
}
itemID = new ItemIdentifier(szString);
BrowseElement[] elementArray = null;
try
{
elementArray = this.m_server.Browse(itemID, filters, out position);
}
catch (Exception)
{
throw CreateException(-2147024809);
}
if ((elementArray == null) || (elementArray.Length == 0))
{
throw CreateException(-2147024809);
}
this.m_browseStack.Clear();
this.m_browseStack.Push(null);
this.m_browseStack.Push(itemID);
goto Label_0179;
Label_00F4:
element = this.FindChild(szString);
if ((element == null) || !element.HasChildren)
{
throw CreateException(-2147024809);
}
this.m_browseStack.Push(new ItemIdentifier(element.ItemName));
goto Label_0179;
Label_0146:
itemID = (ItemIdentifier)this.m_browseStack.Pop();
if ((this.m_browseStack.Count > 0) && (this.m_browseStack.Peek() == null))
{
this.BuildBrowseStack(itemID);
}
Label_0179:
if (position != null)
{
position.Dispose();
position = null;
}
}
catch (Exception exception)
{
throw CreateException(exception);
}
finally
{
Monitor.Exit(server);
}
}
public void Browse(string szItemID, ref IntPtr pszContinuationPoint, int dwMaxElementsReturned, OPCBROWSEFILTER dwBrowseFilter, string szElementNameFilter, string szVendorFilter, int bReturnAllProperties, int bReturnPropertyValues, int dwPropertyCount, int[] pdwPropertyIDs, out int pbMoreElements, out int pdwCount, out IntPtr ppBrowseElements)
{
OpcCom.Da.Wrapper.Server server;
Monitor.Enter(server = this);
try
{
ItemIdentifier itemID = new ItemIdentifier(szItemID);
BrowseFilters filters = new BrowseFilters {
MaxElementsReturned = dwMaxElementsReturned,
BrowseFilter = OpcCom.Da.Interop.GetBrowseFilter(dwBrowseFilter),
ElementNameFilter = szElementNameFilter,
VendorFilter = szVendorFilter,
ReturnAllProperties = bReturnAllProperties != 0,
ReturnPropertyValues = bReturnPropertyValues != 0,
PropertyIDs = OpcCom.Da.Interop.GetPropertyIDs(pdwPropertyIDs)
};
Opc.Da.BrowsePosition position = null;
BrowseElement[] input = null;
string key = null;
if (pszContinuationPoint != IntPtr.Zero)
{
key = Marshal.PtrToStringUni(pszContinuationPoint);
}
if ((key == null) || (key.Length == 0))
{
input = this.m_server.Browse(itemID, filters, out position);
}
else
{
ContinuationPoint point = (ContinuationPoint)this.m_continuationPoints[key];
if (point != null)
{
position = point.Position;
this.m_continuationPoints.Remove(key);
}
if (position == null)
{
throw new ExternalException("E_INVALIDCONTINUATIONPOINT", -1073478653);
}
Marshal.FreeCoTaskMem(pszContinuationPoint);
pszContinuationPoint = IntPtr.Zero;
position.MaxElementsReturned = dwMaxElementsReturned;
input = this.m_server.BrowseNext(ref position);
}
this.CleanupContinuationPoints();
if (position != null)
{
key = Guid.NewGuid().ToString();
this.m_continuationPoints[key] = new ContinuationPoint(position);
pszContinuationPoint = Marshal.StringToCoTaskMemUni(key);
}
if (pszContinuationPoint == IntPtr.Zero)
{
pszContinuationPoint = Marshal.StringToCoTaskMemUni(string.Empty);
}
pbMoreElements = 0;
pdwCount = 0;
ppBrowseElements = IntPtr.Zero;
if (input != null)
{
pdwCount = input.Length;
ppBrowseElements = OpcCom.Da.Interop.GetBrowseElements(input, dwPropertyCount > 0);
}
}
catch (Exception exception)
{
throw CreateException(exception);
}
finally
{
Monitor.Exit(server);
}
}
//======================================================================
// BrowseNext
/// <summary>
/// Continues a browse operation with previously specified search criteria.
/// </summary>
/// <param name="position">An object containing the browse operation state information.</param>
/// <returns>The set of elements found.</returns>
public virtual BrowseElement[] BrowseNext(ref Opc.Da.BrowsePosition position)
{
lock (this)
{
if (m_server == null)
{
throw new NotConnectedException();
}
// check for valid position object.
if (position == null || position.GetType() != typeof(OpcCom.Da.BrowsePosition))
{
throw new BrowseCannotContinueException();
}
OpcCom.Da.BrowsePosition pos = (OpcCom.Da.BrowsePosition)position;
// check for valid continuation point.
if (pos == null || pos.ContinuationPoint == null || pos.ContinuationPoint == "")
{
throw new BrowseCannotContinueException();
}
// initialize arguments.
int count = 0;
int moreElements = 0;
ItemIdentifier itemID = ((BrowsePosition)position).ItemID;
BrowseFilters filters = ((BrowsePosition)position).Filters;
IntPtr pContinuationPoint = Marshal.StringToCoTaskMemUni(pos.ContinuationPoint);
IntPtr pElements = IntPtr.Zero;
// invoke COM method.
try
{
((IOPCBrowse)m_server).Browse(
(itemID != null && itemID.ItemName != null)?itemID.ItemName:"",
ref pContinuationPoint,
filters.MaxElementsReturned,
OpcCom.Da.Interop.GetBrowseFilter(filters.BrowseFilter),
(filters.ElementNameFilter != null)?filters.ElementNameFilter:"",
(filters.VendorFilter != null)?filters.VendorFilter:"",
(filters.ReturnAllProperties)?1:0,
(filters.ReturnPropertyValues)?1:0,
(filters.PropertyIDs != null)?filters.PropertyIDs.Length:0,
OpcCom.Da.Interop.GetPropertyIDs(filters.PropertyIDs),
out moreElements,
out count,
out pElements);
}
catch (Exception e)
{
throw OpcCom.Interop.CreateException("IOPCBrowse.BrowseNext", e);
}
// unmarshal results.
BrowseElement[] elements = OpcCom.Da.Interop.GetBrowseElements(ref pElements, count, true);
pos.ContinuationPoint = Marshal.PtrToStringUni(pContinuationPoint);
Marshal.FreeCoTaskMem(pContinuationPoint);
// check if more no results exist.
if (moreElements == 0 && (pos.ContinuationPoint == null || pos.ContinuationPoint == ""))
{
position = null;
}
// process results.
ProcessResults(elements, filters.PropertyIDs);
return(elements);
}
}
public ContinuationPoint(Opc.Da.BrowsePosition position)
{
this.Position = position;
}
public ContinuationPoint(Opc.Da.BrowsePosition position)
{
Timestamp = DateTime.UtcNow;
Position = position;
}
public void Browse(string szItemID, ref IntPtr pszContinuationPoint, int dwMaxElementsReturned, OPCBROWSEFILTER dwBrowseFilter, string szElementNameFilter, string szVendorFilter, int bReturnAllProperties, int bReturnPropertyValues, int dwPropertyCount, int[] pdwPropertyIDs, out int pbMoreElements, out int pdwCount, out IntPtr ppBrowseElements)
{
lock (this)
{
try
{
ItemIdentifier itemID = new ItemIdentifier(szItemID);
BrowseFilters browseFilters = new BrowseFilters();
browseFilters.MaxElementsReturned = dwMaxElementsReturned;
browseFilters.BrowseFilter = Interop.GetBrowseFilter(dwBrowseFilter);
browseFilters.ElementNameFilter = szElementNameFilter;
browseFilters.VendorFilter = szVendorFilter;
browseFilters.ReturnAllProperties = (bReturnAllProperties != 0);
browseFilters.ReturnPropertyValues = (bReturnPropertyValues != 0);
browseFilters.PropertyIDs = Interop.GetPropertyIDs(pdwPropertyIDs);
Opc.Da.BrowsePosition position = null;
BrowseElement[] array = null;
string text = null;
if (pszContinuationPoint != IntPtr.Zero)
{
text = Marshal.PtrToStringUni(pszContinuationPoint);
}
if (text == null || text.Length == 0)
{
array = m_server.Browse(itemID, browseFilters, out position);
}
else
{
ContinuationPoint continuationPoint = (ContinuationPoint)m_continuationPoints[text];
if (continuationPoint != null)
{
position = continuationPoint.Position;
m_continuationPoints.Remove(text);
}
if (position == null)
{
throw new ExternalException("E_INVALIDCONTINUATIONPOINT", -1073478653);
}
Marshal.FreeCoTaskMem(pszContinuationPoint);
pszContinuationPoint = IntPtr.Zero;
position.MaxElementsReturned = dwMaxElementsReturned;
array = m_server.BrowseNext(ref position);
}
CleanupContinuationPoints();
if (position != null)
{
text = Guid.NewGuid().ToString();
m_continuationPoints[text] = new ContinuationPoint(position);
pszContinuationPoint = Marshal.StringToCoTaskMemUni(text);
}
if (pszContinuationPoint == IntPtr.Zero)
{
pszContinuationPoint = Marshal.StringToCoTaskMemUni(string.Empty);
}
pbMoreElements = 0;
pdwCount = 0;
ppBrowseElements = IntPtr.Zero;
if (array != null)
{
pdwCount = array.Length;
ppBrowseElements = Interop.GetBrowseElements(array, dwPropertyCount > 0);
}
}
catch (Exception e)
{
throw CreateException(e);
}
}
}
public void ChangeBrowsePosition(OPCBROWSEDIRECTION dwBrowseDirection, string szString)
{
lock (this)
{
try
{
BrowseFilters browseFilters = new BrowseFilters();
browseFilters.MaxElementsReturned = 0;
browseFilters.BrowseFilter = browseFilter.all;
browseFilters.ElementNameFilter = null;
browseFilters.VendorFilter = null;
browseFilters.ReturnAllProperties = false;
browseFilters.PropertyIDs = null;
browseFilters.ReturnPropertyValues = false;
ItemIdentifier itemIdentifier = null;
Opc.Da.BrowsePosition position = null;
switch (dwBrowseDirection)
{
case OPCBROWSEDIRECTION.OPC_BROWSE_TO:
{
if (szString == null || szString.Length == 0)
{
m_browseStack.Clear();
break;
}
itemIdentifier = new ItemIdentifier(szString);
BrowseElement[] array = null;
try
{
array = m_server.Browse(itemIdentifier, browseFilters, out position);
}
catch (Exception)
{
throw CreateException(-2147024809);
}
if (array == null || array.Length == 0)
{
throw CreateException(-2147024809);
}
m_browseStack.Clear();
m_browseStack.Push(null);
m_browseStack.Push(itemIdentifier);
break;
}
case OPCBROWSEDIRECTION.OPC_BROWSE_DOWN:
{
if (szString == null || szString.Length == 0)
{
throw CreateException(-2147024809);
}
BrowseElement browseElement = FindChild(szString);
if (browseElement == null || !browseElement.HasChildren)
{
throw CreateException(-2147024809);
}
m_browseStack.Push(new ItemIdentifier(browseElement.ItemName));
break;
}
case OPCBROWSEDIRECTION.OPC_BROWSE_UP:
if (m_browseStack.Count == 0)
{
throw CreateException(-2147467259);
}
itemIdentifier = (ItemIdentifier)m_browseStack.Pop();
if (m_browseStack.Count > 0 && m_browseStack.Peek() == null)
{
BuildBrowseStack(itemIdentifier);
}
break;
}
if (position != null)
{
position.Dispose();
position = null;
}
}
catch (Exception e)
{
throw CreateException(e);
}
}
}
public override BrowseElement[] Browse(ItemIdentifier itemID, BrowseFilters filters, out Opc.Da.BrowsePosition position)
{
if (filters == null)
{
throw new ArgumentNullException("filters");
}
position = null;
lock (this)
{
if (base.m_server == null)
{
throw new NotConnectedException();
}
OpcCom.Da20.BrowsePosition position2 = null;
ArrayList list = new ArrayList();
if (filters.BrowseFilter != browseFilter.item)
{
BrowseElement[] c = this.GetElements(list.Count, itemID, filters, true, ref position2);
if (c != null)
{
list.AddRange(c);
}
position = position2;
if (position != null)
{
return((BrowseElement[])list.ToArray(typeof(BrowseElement)));
}
}
if (filters.BrowseFilter != browseFilter.branch)
{
BrowseElement[] elementArray2 = this.GetElements(list.Count, itemID, filters, false, ref position2);
if (elementArray2 != null)
{
list.AddRange(elementArray2);
}
position = position2;
}
return((BrowseElement[])list.ToArray(typeof(BrowseElement)));
}
}
