Visual Basic 2015 Unleashed

The IConvertible Interface

Objects implementing the IConvertible interface expose a series of ToXXX methods exactly as the Convert class does so that such objects can easily be converted into another type. This example uses a structure instead of a class, for the sake of simplicity. Listing 13.4 shows how the IConvertible interface can be implemented.

LISTING 13.4 Implementing the IConvertible Interface

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Public Structure ThreePoint    Implements IConvertible    Public Function GetTypeCode() As System.TypeCode Implements _        System.IConvertible.GetTypeCode        Return TypeCode.Object    End Function    'Just a custom return value    Public Function ToBoolean(provider As System.IFormatProvider) _        As Boolean ...