OPC Studio User's Guide and Reference
SelectValue<TOutput>(Func<T,TOutput>) Method



OpcLabs.BaseLib Assembly > OpcLabs.BaseLib.OperationModel.Generic Namespace > ValueResult<T> Class > SelectValue Method : SelectValue<TOutput>(Func<T,TOutput>) Method
The type of the value returned by valueSelector.
A transform function to apply to the value.
Transforms the value of a value result using a specified function.
Syntax
'Declaration
 
<NotNullAttribute()>
Public Overloads Function SelectValue(Of TOutput)( _
   ByVal valueSelector As Func(Of T,TOutput) _
) As ValueResult(Of TOutput)
'Usage
 
Dim instance As ValueResult(Of T)
Dim valueSelector As Func(Of T,TOutput)
Dim value As ValueResult(Of TOutput)
 
value = instance.SelectValue(Of TOutput)(valueSelector)
[NotNull()]
public ValueResult<TOutput> SelectValue<TOutput>( 
   Func<T,TOutput> valueSelector
)
[NotNull()]
public:
ValueResult<TOutput^>^ SelectValuegeneric<typename TOutput>
( 
   Func<T^,TOutput^>^ valueSelector
) 

Parameters

valueSelector
A transform function to apply to the value.

Type Parameters

TOutput
The type of the value returned by valueSelector.

Return Value

A ValueResult<T> where the value is transformed using the valueSelector transform function, if the value result represents a success. If the value result represents a failure, a ValueResult<T> representing the same failure is returned.
Exceptions
ExceptionDescription

A null reference (Nothing in Visual Basic) is passed to a method that does not accept it as a valid argument.

This is a usage error, i.e. it will never occur (the exception will not be thrown) in a correctly written program. Your code should not catch this exception.

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