Traté de obligar a la siguiente enumeración a un cuadro combinadoEncuadernación convertida Enum a un cuadro combinado
Public Enum PossibleActions
ActionRead
ActionWrite
ActionVerify
End Enum
No puedo cambiar la propia enumeración, pero no desee mostrar estas cadenas. Mi intención es solo cortar el prefijo 'Acción' y mostrar 'Leer', 'Escribir' y 'Verificar' en el ComboBox. Por lo tanto escribí un ValueConverter
Public Class PossibleActionsConverter
Implements IValueConverter
Public Function Convert(ByVal value As Object, ByVal targetType As System.Type, ByVal parameter As Object, ByVal culture As System.Globalization.CultureInfo) As Object Implements System.Windows.Data.IValueConverter.Convert
Dim actions() As PossibleActions
Dim strings() As String
actions = CType(value, PossibleActions())
ReDim strings(actions.GetUpperBound(0))
For i = 0 To actions.GetUpperBound(0)
strings(i) = actions(i).ToString.Substring(6)
Next
Return strings
End Function
Public Function ConvertBack(ByVal value As Object, ByVal targetType As System.Type, ByVal parameter As Object, ByVal culture As System.Globalization.CultureInfo) As Object Implements System.Windows.Data.IValueConverter.ConvertBack
Dim s As String
s = CStr(value)
Return [Enum].Parse(GetType(PossibleActions), "Action" & s)
End Function
End Class
Mi XAML parece
xmlns:sys="clr-namespace:System;assembly=mscorlib"
xmlns:local="clr-namespace:StepEditor"
[...]
<Window.Resources>
<ObjectDataProvider x:Key="possibleActionsEnum" MethodName="GetValues"
ObjectType="{x:Type sys:Enum}">
<ObjectDataProvider.MethodParameters>
<x:TypeExtension Type="local:PossibleActions"></x:TypeExtension>
</ObjectDataProvider.MethodParameters>
</ObjectDataProvider>
<local:PossibleActionsConverter x:Key="possibleActionsConverter"></local:PossibleActionsConverter>
</Window.Resources>
[...]
O bien:
<ComboBox ItemsSource="{Binding Source={StaticResource possibleActionsEnum}, Converter={StaticResource possibleActionsConverter}}"
SelectedItem="{Binding SelectedAction}"></ComboBox>
O bien:
<ComboBox ItemsSource="{Binding Source={StaticResource possibleActionsEnum}, Converter={StaticResource possibleActionsConverter}}"
SelectedItem="{Binding SelectedAction, Converter={StaticResource possibleActionsConverter}}"></ComboBox>
Mi problema es la vinculación del artículo seleccionado. No funciona, pero no puedo entender por qué.