public ComplexItem[] GetDataFilters(Opc.Da.Server server)
{
ComplexItem[] itemArray;
if (this.m_unfilteredItemID != null)
{
return(null);
}
if (this.m_filterItem == null)
{
return(null);
}
BrowsePosition position = null;
try
{
BrowseFilters filters = new BrowseFilters {
ElementNameFilter = null,
BrowseFilter = browseFilter.item,
ReturnAllProperties = false,
PropertyIDs = CPX_PROPERTIES,
ReturnPropertyValues = true
};
BrowseElement[] elementArray = server.Browse(this.m_filterItem, filters, out position);
if ((elementArray == null) || (elementArray.Length == 0))
{
return(new ComplexItem[0]);
}
ArrayList list = new ArrayList(elementArray.Length);
foreach (BrowseElement element in elementArray)
{
ComplexItem item = new ComplexItem();
if (item.Init(element))
{
list.Add(item);
}
}
itemArray = (ComplexItem[])list.ToArray(typeof(ComplexItem));
}
finally
{
if (position != null)
{
position.Dispose();
position = null;
}
}
return(itemArray);
}
public ComplexItem CreateDataFilter(Opc.Da.Server server, string filterName, string filterValue)
{
ComplexItem item2;
if (this.m_unfilteredItemID != null)
{
return(null);
}
if (this.m_filterItem == null)
{
return(null);
}
BrowsePosition position = null;
try
{
ItemValue value2 = new ItemValue(this.m_filterItem);
StringWriter w = new StringWriter();
XmlTextWriter writer2 = new XmlTextWriter(w);
writer2.WriteStartElement("DataFilters");
writer2.WriteAttributeString("Name", filterName);
writer2.WriteString(filterValue);
writer2.WriteEndElement();
writer2.Close();
value2.Value = w.ToString();
value2.Quality = Quality.Bad;
value2.QualitySpecified = false;
value2.Timestamp = DateTime.MinValue;
value2.TimestampSpecified = false;
IdentifiedResult[] resultArray = server.Write(new ItemValue[] { value2 });
if ((resultArray == null) || (resultArray.Length == 0))
{
throw new ApplicationException("Unexpected result from server.");
}
if (resultArray[0].ResultID.Failed())
{
throw new ApplicationException("Could not create new data filter.");
}
BrowseFilters filters = new BrowseFilters {
ElementNameFilter = filterName,
BrowseFilter = browseFilter.item,
ReturnAllProperties = false,
PropertyIDs = CPX_PROPERTIES,
ReturnPropertyValues = true
};
BrowseElement[] elementArray = server.Browse(this.m_filterItem, filters, out position);
if ((elementArray == null) || (elementArray.Length == 0))
{
throw new ApplicationException("Could not browse to new data filter.");
}
ComplexItem item = new ComplexItem();
if (!item.Init(elementArray[0]))
{
throw new ApplicationException("Could not initialize to new data filter.");
}
item2 = item;
}
finally
{
if (position != null)
{
position.Dispose();
position = null;
}
}
return(item2);
}
public ComplexItem[] GetTypeConversions(Opc.Da.Server server)
{
ComplexItem[] itemArray;
if ((this.m_unconvertedItemID != null) || (this.m_unfilteredItemID != null))
{
return(null);
}
BrowsePosition position = null;
try
{
BrowseFilters filters = new BrowseFilters {
ElementNameFilter = "CPX",
BrowseFilter = browseFilter.branch,
ReturnAllProperties = false,
PropertyIDs = null,
ReturnPropertyValues = false
};
BrowseElement[] elementArray = server.Browse(this, filters, out position);
if ((elementArray == null) || (elementArray.Length == 0))
{
return(null);
}
if (position != null)
{
position.Dispose();
position = null;
}
ItemIdentifier itemID = new ItemIdentifier(elementArray[0].ItemPath, elementArray[0].ItemName);
filters.ElementNameFilter = null;
filters.BrowseFilter = browseFilter.item;
filters.ReturnAllProperties = false;
filters.PropertyIDs = CPX_PROPERTIES;
filters.ReturnPropertyValues = true;
elementArray = server.Browse(itemID, filters, out position);
if ((elementArray == null) || (elementArray.Length == 0))
{
return(new ComplexItem[0]);
}
ArrayList list = new ArrayList(elementArray.Length);
foreach (BrowseElement element in elementArray)
{
if (element.Name != "DataFilters")
{
ComplexItem item = new ComplexItem();
if (item.Init(element))
{
item.GetDataFilterItem(server);
list.Add(item);
}
}
}
itemArray = (ComplexItem[])list.ToArray(typeof(ComplexItem));
}
finally
{
if (position != null)
{
position.Dispose();
position = null;
}
}
return(itemArray);
}
