ArgumentValidationAttribute.IsSpanValid Method

public virtual bool? IsSpanValid(
	CommandLineArgument argument,
	ReadOnlySpan<char> value
)

Public Overridable Function IsSpanValid ( 
	argument As CommandLineArgument,
	value As ReadOnlySpan(Of Char)
) As Boolean?

Dim instance As ArgumentValidationAttribute
Dim argument As CommandLineArgument
Dim value As ReadOnlySpan(Of Char)

Dim returnValue As Boolean?

returnValue = instance.IsSpanValid(argument, 
	value)

public:
virtual Nullable<bool> IsSpanValid(
	CommandLineArgument^ argument, 
	ReadOnlySpan<wchar_t> value
)

Parameters

argument  CommandLineArgument

The argument being validated.

value  ReadOnlySpan<Char>

The raw string argument value provided by the user on the command line.

Return Value

The CommandLineParser class will only call this method if the Mode property is ValidationMode.BeforeConversion.

If you need to check the type of the argument, use the CommandLineArgument.ElementType property unless you want to get the collection type for a multi-value or dictionary argument.

The base class implementation returns null.

Reference