/// <summary>
/// Fetches the set of data filters from the server.
/// </summary>
public ComplexItem[] GetDataFilters(Opc.Da.Server server)
{
// not a valid operation for data filter items.
if (m_unfilteredItemID != null)
{
return(null);
}
// data filters not supported by the item.
if (m_filterItem == null)
{
return(null);
}
BrowsePosition position = null;
try
{
// browse any existing filter instances.
BrowseFilters filters = new BrowseFilters();
filters.ElementNameFilter = null;
filters.BrowseFilter = browseFilter.item;
filters.ReturnAllProperties = false;
filters.PropertyIDs = CPX_PROPERTIES;
filters.ReturnPropertyValues = true;
BrowseElement[] elements = server.Browse(m_filterItem, filters, out position);
// nothing found.
if (elements == null || elements.Length == 0)
{
return(new ComplexItem[0]);
}
// contruct an array of complex data items for each available data filter.
ArrayList dataFilters = new ArrayList(elements.Length);
foreach (BrowseElement element in elements)
{
ComplexItem item = new ComplexItem();
if (item.Init(element))
{
dataFilters.Add(item);
}
}
// return the set of available data filters.
return((ComplexItem[])dataFilters.ToArray(typeof(ComplexItem)));
}
finally
{
if (position != null)
{
position.Dispose();
position = null;
}
}
}
// Token: 0x06000355 RID: 853 RVA: 0x00008C14 File Offset: 0x00007C14
public ComplexItem[] GetDataFilters(Da.Server server)
{
if (this.m_unfilteredItemID != null)
{
return(null);
}
if (this.m_filterItem == null)
{
return(null);
}
BrowsePosition browsePosition = null;
ComplexItem[] result;
try
{
BrowseFilters browseFilters = new BrowseFilters();
browseFilters.ElementNameFilter = null;
browseFilters.BrowseFilter = browseFilter.item;
browseFilters.ReturnAllProperties = false;
browseFilters.PropertyIDs = ComplexItem.CPX_PROPERTIES;
browseFilters.ReturnPropertyValues = true;
BrowseElement[] array = server.Browse(this.m_filterItem, browseFilters, out browsePosition);
if (array == null || array.Length == 0)
{
result = new ComplexItem[0];
}
else
{
ArrayList arrayList = new ArrayList(array.Length);
foreach (BrowseElement element in array)
{
ComplexItem complexItem = new ComplexItem();
if (complexItem.Init(element))
{
arrayList.Add(complexItem);
}
}
result = (ComplexItem[])arrayList.ToArray(typeof(ComplexItem));
}
}
finally
{
if (browsePosition != null)
{
browsePosition.Dispose();
browsePosition = null;
}
}
return(result);
}
// Token: 0x06000356 RID: 854 RVA: 0x00008D00 File Offset: 0x00007D00
public ComplexItem CreateDataFilter(Da.Server server, string filterName, string filterValue)
{
if (this.m_unfilteredItemID != null)
{
return(null);
}
if (this.m_filterItem == null)
{
return(null);
}
BrowsePosition browsePosition = null;
ComplexItem result;
try
{
ItemValue itemValue = new ItemValue(this.m_filterItem);
StringWriter stringWriter = new StringWriter();
XmlTextWriter xmlTextWriter = new XmlTextWriter(stringWriter);
xmlTextWriter.WriteStartElement("DataFilters");
xmlTextWriter.WriteAttributeString("Name", filterName);
xmlTextWriter.WriteString(filterValue);
xmlTextWriter.WriteEndElement();
xmlTextWriter.Close();
itemValue.Value = stringWriter.ToString();
itemValue.Quality = Quality.Bad;
itemValue.QualitySpecified = false;
itemValue.Timestamp = DateTime.MinValue;
itemValue.TimestampSpecified = false;
IdentifiedResult[] array = server.Write(new ItemValue[]
{
itemValue
});
if (array == null || array.Length == 0)
{
throw new ApplicationException("Unexpected result from server.");
}
if (array[0].ResultID.Failed())
{
throw new ApplicationException("Could not create new data filter.");
}
BrowseFilters browseFilters = new BrowseFilters();
browseFilters.ElementNameFilter = filterName;
browseFilters.BrowseFilter = browseFilter.item;
browseFilters.ReturnAllProperties = false;
browseFilters.PropertyIDs = ComplexItem.CPX_PROPERTIES;
browseFilters.ReturnPropertyValues = true;
BrowseElement[] array2 = server.Browse(this.m_filterItem, browseFilters, out browsePosition);
if (array2 == null || array2.Length == 0)
{
throw new ApplicationException("Could not browse to new data filter.");
}
ComplexItem complexItem = new ComplexItem();
if (!complexItem.Init(array2[0]))
{
throw new ApplicationException("Could not initialize to new data filter.");
}
result = complexItem;
}
finally
{
if (browsePosition != null)
{
browsePosition.Dispose();
browsePosition = null;
}
}
return(result);
}
// Token: 0x06000354 RID: 852 RVA: 0x00008AA0 File Offset: 0x00007AA0
public ComplexItem[] GetTypeConversions(Da.Server server)
{
if (this.m_unconvertedItemID != null || this.m_unfilteredItemID != null)
{
return(null);
}
BrowsePosition browsePosition = null;
ComplexItem[] result;
try
{
BrowseFilters browseFilters = new BrowseFilters();
browseFilters.ElementNameFilter = "CPX";
browseFilters.BrowseFilter = browseFilter.branch;
browseFilters.ReturnAllProperties = false;
browseFilters.PropertyIDs = null;
browseFilters.ReturnPropertyValues = false;
BrowseElement[] array = server.Browse(this, browseFilters, out browsePosition);
if (array == null || array.Length == 0)
{
result = null;
}
else
{
if (browsePosition != null)
{
browsePosition.Dispose();
browsePosition = null;
}
ItemIdentifier itemID = new ItemIdentifier(array[0].ItemPath, array[0].ItemName);
browseFilters.ElementNameFilter = null;
browseFilters.BrowseFilter = browseFilter.item;
browseFilters.ReturnAllProperties = false;
browseFilters.PropertyIDs = ComplexItem.CPX_PROPERTIES;
browseFilters.ReturnPropertyValues = true;
array = server.Browse(itemID, browseFilters, out browsePosition);
if (array == null || array.Length == 0)
{
result = new ComplexItem[0];
}
else
{
ArrayList arrayList = new ArrayList(array.Length);
foreach (BrowseElement browseElement in array)
{
if (browseElement.Name != "DataFilters")
{
ComplexItem complexItem = new ComplexItem();
if (complexItem.Init(browseElement))
{
complexItem.GetDataFilterItem(server);
arrayList.Add(complexItem);
}
}
}
result = (ComplexItem[])arrayList.ToArray(typeof(ComplexItem));
}
}
}
finally
{
if (browsePosition != null)
{
browsePosition.Dispose();
browsePosition = null;
}
}
return(result);
}
/// <summary>
/// Creates a new data filter.
/// </summary>
public ComplexItem CreateDataFilter(Opc.Da.Server server, string filterName, string filterValue)
{
// not a valid operation for data filter items.
if (m_unfilteredItemID != null)
{
return(null);
}
// data filters not supported by the item.
if (m_filterItem == null)
{
return(null);
}
BrowsePosition position = null;
try
{
// write the desired filter to the server.
ItemValue item = new ItemValue(m_filterItem);
// create the filter parameters document.
StringWriter ostrm = new StringWriter();
XmlTextWriter writer = new XmlTextWriter(ostrm);
writer.WriteStartElement("DataFilters");
writer.WriteAttributeString("Name", filterName);
writer.WriteString(filterValue);
writer.WriteEndElement();
writer.Close();
// create the value to write.
item.Value = ostrm.ToString();
item.Quality = Quality.Bad;
item.QualitySpecified = false;
item.Timestamp = DateTime.MinValue;
item.TimestampSpecified = false;
// write the value.
IdentifiedResult[] result = server.Write(new ItemValue[] { item });
if (result == null || result.Length == 0)
{
throw new ApplicationException("Unexpected result from server.");
}
if (result[0].ResultID.Failed())
{
throw new ApplicationException("Could not create new data filter.");
}
// browse for new data filter item.
BrowseFilters filters = new BrowseFilters();
filters.ElementNameFilter = filterName;
filters.BrowseFilter = browseFilter.item;
filters.ReturnAllProperties = false;
filters.PropertyIDs = CPX_PROPERTIES;
filters.ReturnPropertyValues = true;
BrowseElement[] elements = server.Browse(m_filterItem, filters, out position);
// nothing found.
if (elements == null || elements.Length == 0)
{
throw new ApplicationException("Could not browse to new data filter.");
}
ComplexItem filterItem = new ComplexItem();
if (!filterItem.Init(elements[0]))
{
throw new ApplicationException("Could not initialize to new data filter.");
}
// return the new data filter.
return(filterItem);
}
finally
{
if (position != null)
{
position.Dispose();
position = null;
}
}
}
/// <summary>
/// Fetches the set of type conversions from the server.
/// </summary>
public ComplexItem[] GetTypeConversions(Opc.Da.Server server)
{
// only the root item can have type conversions.
if (m_unconvertedItemID != null || m_unfilteredItemID != null)
{
return(null);
}
BrowsePosition position = null;
try
{
// look for the 'CPX' branch.
BrowseFilters filters = new BrowseFilters();
filters.ElementNameFilter = CPX_BRANCH;
filters.BrowseFilter = browseFilter.branch;
filters.ReturnAllProperties = false;
filters.PropertyIDs = null;
filters.ReturnPropertyValues = false;
BrowseElement[] elements = server.Browse(this, filters, out position);
// nothing found.
if (elements == null || elements.Length == 0)
{
return(null);
}
// release the browse position object.
if (position != null)
{
position.Dispose();
position = null;
}
// browse for type conversions.
ItemIdentifier itemID = new ItemIdentifier(elements[0].ItemPath, elements[0].ItemName);
filters.ElementNameFilter = null;
filters.BrowseFilter = browseFilter.item;
filters.ReturnAllProperties = false;
filters.PropertyIDs = CPX_PROPERTIES;
filters.ReturnPropertyValues = true;
elements = server.Browse(itemID, filters, out position);
// nothing found.
if (elements == null || elements.Length == 0)
{
return(new ComplexItem[0]);
}
// contruct an array of complex data items for each available conversion.
ArrayList conversions = new ArrayList(elements.Length);
foreach (BrowseElement element in elements)
{
if (element.Name != CPX_DATA_FILTERS)
{
ComplexItem item = new ComplexItem();
if (item.Init(element))
{
// check if data filters supported for type conversion.
item.GetDataFilterItem(server);
conversions.Add(item);
}
}
}
// return the set of available conversions.
return((ComplexItem[])conversions.ToArray(typeof(ComplexItem)));
}
finally
{
if (position != null)
{
position.Dispose();
position = null;
}
}
}