'Declaration
Public Overloads Function TryGetFieldValue(Of TValue)( _ ByVal attributeField As UAAttributeField, _ ByRef value As TValue _ ) As Boolean
'Usage
Dim instance As UAEventData Dim attributeField As UAAttributeField Dim value As TValue Dim value As Boolean value = instance.TryGetFieldValue(Of TValue)(attributeField, value)
public bool TryGetFieldValue<TValue>( UAAttributeField attributeField, out TValue value )
public: bool TryGetFieldValuegeneric<typename TValue> ( UAAttributeField^ attributeField, [Out] TValue^ 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 or is not of the specified type.
The value of this parameter can be
null
(Nothing
in Visual Basic).
Type Parameters
- TValue
- Type of the value to be retrieved.