QuickOPC User's Guide and Reference
OnRequestNullableChanged Method (AutomaticValueControl)



OpcLabs.BaseLibForms Assembly > OpcLabs.BaseLib.Forms Namespace > AutomaticValueControl Class : OnRequestNullableChanged Method
The old value of the property.The old value of the property.
Called when the value of the RequestNullable property has changed.Called when the value of the RequestNullable property has changed.
Syntax
'Declaration
 
Protected Overrides NotOverridable Sub OnRequestNullableChanged( _
   ByVal oldValue As Boolean _
) 
'Usage
 
Dim instance As AutomaticValueControl
Dim oldValue As Boolean
 
instance.OnRequestNullableChanged(oldValue)
protected override void OnRequestNullableChanged( 
   bool oldValue
)
protected:
void OnRequestNullableChanged( 
   bool oldValue
) override 

Parameters

oldValue
The old value of the property.The old value of the property.
Requirements

Target Platforms: .NET Framework: Windows 10 (selected versions), Windows 11 (selected versions), Windows Server 2016, Windows Server 2022; .NET: Linux, macOS, Microsoft Windows

See Also