OPC Studio User's Guide and Reference
IsOptional Property (_DataField)



OpcLabs.BaseLib Assembly > OpcLabs.BaseLib.DataTypeModel.ComTypes Namespace > _DataField Interface : IsOptional Property
Determines whether the field may be omitted from the encoded data.
Syntax
'Declaration
 

Property IsOptional As Boolean
'Usage
 

Dim instance As _DataField
Dim value As Boolean
 
instance.IsOptional = value
 
value = instance.IsOptional
bool IsOptional {get; set;}
property bool IsOptional {
   bool get();
   void set (    bool value);
}

Property Value

The default value of this property is False.

Remarks
Whether the field is encoded may depend on other factors, such as the value of a switch field.

This member or type is for use from COM. It is not meant to be used from .NET or Python. Refer to the corresponding .NET member or type instead, if you are developing in .NET or Python.

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

Reference

_DataField Interface
_DataField Members

 

 

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