private ArrayList FetchElements(EnumString enumerator, int maxElements, bool isBranch)
{
ArrayList list = new ArrayList();
while (list.Count < maxElements)
{
int count = 10;
if ((list.Count + count) > maxElements)
{
count = maxElements - list.Count;
}
string[] strArray = enumerator.Next(count);
if ((strArray == null) || (strArray.Length == 0))
{
break;
}
foreach (string str in strArray)
{
BrowseElement element = new BrowseElement {
Name = str
};
try
{
string pszItemID = null;
this.m_browser.GetItemID(str, out pszItemID);
element.ItemName = pszItemID;
element.ItemPath = null;
element.HasChildren = isBranch;
}
catch
{
}
list.Add(element);
}
}
IdentifiedResult[] resultArray = this.m_server.ValidateItems((ItemIdentifier[])list.ToArray(typeof(ItemIdentifier)));
if (resultArray != null)
{
for (int i = 0; i < resultArray.Length; i++)
{
if (resultArray[i].ResultID.Succeeded())
{
((BrowseElement)list[i]).IsItem = true;
}
}
}
return(list);
}
/// <summary>
/// Fetches the element names and item ids for each element.
/// </summary>
private ArrayList FetchElements(EnumString enumerator, int maxElements, bool isBranch)
{
ArrayList elements = new ArrayList();
while (elements.Count < maxElements)
{
// fetch next batch of element names.
int count = BLOCK_SIZE;
if (elements.Count + count > maxElements)
{
count = maxElements - elements.Count;
}
string[] names = null;
names = enumerator.Next(count);
// check if no more elements found.
if (names == null || names.Length == 0)
{
break;
}
// create new element objects.
foreach (string name in names)
{
TsCHdaBrowseElement element = new TsCHdaBrowseElement();
element.Name = name;
// lookup item id for element.
try
{
string itemID = null;
m_browser.GetItemID(name, out itemID);
element.ItemName = itemID;
element.ItemPath = null;
element.HasChildren = isBranch;
}
catch
{
// ignore errors.
}
elements.Add(element);
}
}
// validate items - this is necessary to set the IsItem flag correctly.
OpcItemResult[] results = m_server.ValidateItems((OpcItem[])elements.ToArray(typeof(OpcItem)));
if (results != null)
{
for (int ii = 0; ii < results.Length; ii++)
{
if (results[ii].Result.Succeeded())
{
((TsCHdaBrowseElement)elements[ii]).IsItem = true;
}
}
}
// return results.
return(elements);
}
private BrowseElement[] GetElements(int elementsFound, ItemIdentifier itemID, BrowseFilters filters, bool branches, ref OpcCom.Da20.BrowsePosition position)
{
EnumString enumerator = null;
if (position == null)
{
IOPCBrowseServerAddressSpace server = (IOPCBrowseServerAddressSpace)base.m_server;
OPCNAMESPACETYPE pNameSpaceType = OPCNAMESPACETYPE.OPC_NS_HIERARCHIAL;
try
{
server.QueryOrganization(out pNameSpaceType);
}
catch (Exception exception)
{
throw OpcCom.Interop.CreateException("IOPCBrowseServerAddressSpace.QueryOrganization", exception);
}
if ((pNameSpaceType == OPCNAMESPACETYPE.OPC_NS_FLAT) && branches)
{
return(new BrowseElement[0]);
}
enumerator = this.GetEnumerator((itemID != null) ? itemID.ItemName : null, filters, branches);
}
else
{
enumerator = position.Enumerator;
}
ArrayList list = new ArrayList();
BrowseElement element = null;
int index = 0;
string[] names = null;
if (position != null)
{
index = position.Index;
names = position.Names;
position = null;
}
Label_0089:
if (names != null)
{
for (int i = index; i < names.Length; i++)
{
if ((filters.MaxElementsReturned != 0) && (filters.MaxElementsReturned == (list.Count + elementsFound)))
{
position = new OpcCom.Da20.BrowsePosition(itemID, filters, enumerator, branches);
position.Names = names;
position.Index = i;
break;
}
element = this.GetElement(names[i], filters, branches);
if (element == null)
{
break;
}
list.Add(element);
}
}
if (position == null)
{
names = enumerator.Next(10);
index = 0;
if ((names != null) && (names.Length > 0))
{
goto Label_0089;
}
}
if (position == null)
{
enumerator.Dispose();
}
return((BrowseElement[])list.ToArray(typeof(BrowseElement)));
}
private BrowseElement[] GetElements(int elementsFound, ItemIdentifier itemID, BrowseFilters filters, bool branches, ref BrowsePosition position)
{
EnumString enumString = null;
if (position == null)
{
IOPCBrowseServerAddressSpace iOPCBrowseServerAddressSpace = (IOPCBrowseServerAddressSpace)m_server;
OPCNAMESPACETYPE pNameSpaceType = OPCNAMESPACETYPE.OPC_NS_HIERARCHIAL;
try
{
iOPCBrowseServerAddressSpace.QueryOrganization(out pNameSpaceType);
}
catch (Exception e)
{
throw Interop.CreateException("IOPCBrowseServerAddressSpace.QueryOrganization", e);
}
if (pNameSpaceType == OPCNAMESPACETYPE.OPC_NS_FLAT)
{
if (branches)
{
return(new BrowseElement[0]);
}
if (itemID != null && itemID.ItemName != null && itemID.ItemName.Length > 0)
{
throw new ResultIDException(ResultID.Da.E_UNKNOWN_ITEM_NAME);
}
}
enumString = GetEnumerator(itemID?.ItemName, filters, branches, pNameSpaceType == OPCNAMESPACETYPE.OPC_NS_FLAT);
}
else
{
enumString = position.Enumerator;
}
ArrayList arrayList = new ArrayList();
BrowseElement browseElement = null;
int num = 0;
string[] array = null;
if (position != null)
{
num = position.Index;
array = position.Names;
position = null;
}
do
{
if (array != null)
{
for (int i = num; i < array.Length; i++)
{
if (filters.MaxElementsReturned != 0 && filters.MaxElementsReturned == arrayList.Count + elementsFound)
{
position = new BrowsePosition(itemID, filters, enumString, branches);
position.Names = array;
position.Index = i;
break;
}
browseElement = GetElement(itemID, array[i], filters, branches);
if (browseElement == null)
{
break;
}
arrayList.Add(browseElement);
}
}
if (position != null)
{
break;
}
array = enumString.Next(10);
num = 0;
}while (array != null && array.Length > 0);
if (position == null)
{
enumString.Dispose();
}
return((BrowseElement[])arrayList.ToArray(typeof(BrowseElement)));
}
private ArrayList FetchElements(EnumString enumerator, int maxElements, bool isBranch)
{
ArrayList arrayList = new ArrayList();
while (arrayList.Count < maxElements)
{
int num = 10;
if (arrayList.Count + num > maxElements)
{
num = maxElements - arrayList.Count;
}
string[] array = enumerator.Next(num);
if (array == null || array.Length == 0)
{
break;
}
string[] array2 = array;
foreach (string text in array2)
{
BrowseElement browseElement = new BrowseElement();
browseElement.Name = text;
browseElement.ItemPath = null;
browseElement.HasChildren = isBranch;
string pszItemID = null;
try
{
if (isBranch)
{
pszItemID = GetFullBranchName(text);
}
else
{
m_browser.GetItemID(text, out pszItemID);
}
}
catch
{
pszItemID = null;
}
browseElement.ItemName = pszItemID;
arrayList.Add(browseElement);
}
}
IdentifiedResult[] array3 = m_server.ValidateItems((ItemIdentifier[])arrayList.ToArray(typeof(ItemIdentifier)));
if (array3 != null)
{
for (int j = 0; j < array3.Length; j++)
{
if (array3[j].ResultID.Succeeded())
{
((BrowseElement)arrayList[j]).IsItem = true;
}
}
}
return(arrayList);
}