/// <summary>
/// Fetches the operand value.
/// </summary>
public FilterOperand GetOperand(TypeInfo typeInfo)
{
if (Element != null)
{
return(new ElementOperand((uint)Element));
}
if (Literal != null)
{
object targetLiteral = TypeInfo.Cast(Literal, typeInfo.BuiltInType);
return(new LiteralOperand(targetLiteral));
}
if (Attribute != null)
{
AttributeOperand attributeOperand = new AttributeOperand(new NodeId(Attribute.NodeId), Attribute.BrowsePath);
attributeOperand.Alias = Attribute.Alias;
attributeOperand.AttributeId = Attribute.AttributeId.ResolveAttributeId();
attributeOperand.IndexRange = Attribute.IndexRange;
return(attributeOperand);
}
if (SimpleAttribute != null)
{
List <QualifiedName> browsePaths = new List <QualifiedName>();
if (SimpleAttribute.BrowsePaths != null)
{
foreach (var browsePath in SimpleAttribute.BrowsePaths)
{
browsePaths.Add(new QualifiedName(browsePath));
}
}
SimpleAttributeOperand simpleAttributeOperand = new SimpleAttributeOperand(new NodeId(SimpleAttribute.TypeId), browsePaths.ToArray());
simpleAttributeOperand.AttributeId = SimpleAttribute.AttributeId.ResolveAttributeId();
simpleAttributeOperand.IndexRange = SimpleAttribute.IndexRange;
return(simpleAttributeOperand);
}
return(null);
}
/// <summary>
/// Displays the dialog.
/// </summary>
public FilterOperand ShowDialog(
Session session,
IList <ContentFilterElement> elements,
int index,
FilterOperand operand)
{
if (session == null)
{
throw new ArgumentNullException("session");
}
if (elements == null)
{
throw new ArgumentNullException("elements");
}
m_session = session;
TypeDefinitionIdCTRL.Browser = new Browser(session);
TypeDefinitionIdCTRL.RootId = ObjectTypes.BaseEventType;
OperandTypeCB.SelectedItem = typeof(LiteralOperand).Name;
if (operand != null)
{
OperandTypeCB.SelectedItem = operand.GetType().Name;
}
ElementsCB.Items.Clear();
for (int ii = index + 1; ii < elements.Count; ii++)
{
ElementsCB.Items.Add(elements[ii].ToString(m_session.NodeCache));
}
ElementOperand elementOperand = operand as ElementOperand;
if (elementOperand != null)
{
ElementsCB.SelectedIndex = (int)elementOperand.Index - index - 1;
}
AttributeOperand attributeOperand = operand as AttributeOperand;
if (attributeOperand != null)
{
TypeDefinitionIdCTRL.Identifier = attributeOperand.NodeId;
BrowsePathTB.Text = attributeOperand.BrowsePath.Format(session.NodeCache.TypeTree);
AttributeIdCB.SelectedItem = Attributes.GetBrowseName(attributeOperand.AttributeId);
IndexRangeTB.Text = attributeOperand.IndexRange;
AliasTB.Text = attributeOperand.Alias;
}
LiteralOperand literalOperand = operand as LiteralOperand;
if (literalOperand != null)
{
NodeId datatypeId = TypeInfo.GetDataTypeId(literalOperand.Value.Value);
DataTypeCB.SelectedItem = TypeInfo.GetBuiltInType(datatypeId);
StringBuilder buffer = new StringBuilder();
Array array = literalOperand.Value.Value as Array;
if (array != null)
{
for (int ii = 0; ii < array.Length; ii++)
{
if (ii > 0)
{
buffer.Append("\r\n");
}
buffer.AppendFormat("{0}", new Variant(array.GetValue(ii)));
}
}
else
{
buffer.AppendFormat("{0}", literalOperand.Value);
}
ValueTB.Text = buffer.ToString();
}
if (ShowDialog() != DialogResult.OK)
{
return(null);
}
return(operand);
}