'Declaration
Public Overloads Function TryGetFieldValue( _ ByVal attributeField As UAAttributeField, _ ByRef value As Object _ ) As Boolean
'Usage
Dim instance As UAEventData Dim attributeField As UAAttributeField Dim value As Object Dim value As Boolean value = instance.TryGetFieldValue(attributeField, value)
public bool TryGetFieldValue( UAAttributeField attributeField, out object value )
public: bool TryGetFieldValue( UAAttributeField^ attributeField, [Out] Object^ value )
Parameters
- attributeField
- Attribute field to look up in the event data.
Because the UAAttributeField has an implicit conversion from OpcLabs.EasyOpc.UA.Filtering.UASimpleAttributeOperand, in languages that support implicit conversion operators (such as C# or VB.NET), you can simply use a OpcLabs.EasyOpc.UA.Filtering.UASimpleAttributeOperand in place of this parameter, and the corresponding OPC UA attribute field will be constructed automatically. When the implicit conversion operators are not supported (such as with Python.NET), you can use the FromUASimpleAttributeOperand static method instead.
The value of this parameter cannot be
null
(Nothing
in Visual Basic). - value
- The value found, or a null reference if the attribute field has not been found.
The value of this parameter can be
null
(Nothing
in Visual Basic).
Return Value
true
if the attribute field has been found; false
otherwise.