綁定單選按鈕以枚舉silverlight

Question

我正在使用this作爲我當前需要的源代碼。 它工作正常，但我可以選擇我的單選按鈕只有一次。這裏是我的代碼：

<StackPanel Orientation="Vertical" Grid.Column="0" > 
    <sdk:Label Content="Materiale:" Margin="0,0,0,5" /> 
    <RadioButton GroupName="Materiale" Margin="0,0,0,2" 
        Content="All" 
        IsChecked="{Binding Path=Materiale, 
           Mode=TwoWay, 
           Converter={StaticResource EnumToVisibilityConverter}, 
           ConverterParameter=All}" 
        Command="{Binding CambioMaterialeCommand}" /> 
    <RadioButton GroupName="Materiale" Margin="0,0,0,2" 
        Content="RotabiliSingoli" 
        IsChecked="{Binding Path=Materiale, 
           Mode=TwoWay, 
           Converter={StaticResource EnumToVisibilityConverter}, 
           ConverterParameter=RotabiliSingoli}" 
        Command="{Binding CambioMaterialeCommand}" /> 
    <RadioButton GroupName="Materiale" Margin="0,0,0,2" 
        Content="Treni" 
        IsChecked="{Binding Path=Materiale, 
           Mode=TwoWay, 
           Converter={StaticResource EnumToVisibilityConverter}, 
           ConverterParameter=Treni}" 
        Command="{Binding CambioMaterialeCommand}" /> 
    <RadioButton GroupName="Materiale" Margin="0,0,0,2" 
        Content="CarrozzeLocomotive" 
        IsChecked="{Binding Path=Materiale, 
           Mode=TwoWay, 
           Converter={StaticResource EnumToVisibilityConverter}, 
           ConverterParameter=CarrozzeLocomotive}" 
        Command="{Binding CambioMaterialeCommand}"/> 
</StackPanel> 

在視圖模型，我有：

public void CambioMateriale() 
     { 
      switch (Materiale) 
      { 
       case E_Materiale.All: 
        IsVisibleLocomotivaCarozza = false; 
        IsVisibleTrenoPartenza = false; 
        break; 
       case E_Materiale.RotabiliSingoli: 
        IsVisibleLocomotivaCarozza = false; 
        IsVisibleTrenoPartenza = false; 
        break; 
       case E_Materiale.Treni: 
        IsVisibleLocomotivaCarozza = false; 
        IsVisibleTrenoPartenza = true; 
        break; 
       case E_Materiale.CarrozzeLocomotive: 
        IsVisibleLocomotivaCarozza = true; 
        IsVisibleTrenoPartenza = false; 
        break; 
      } 

     } 

當把一個斷點的開關上，我可以看到一個單選按鈕去到另一個時Materiale值發生變化，但如果我嘗試重新選擇一個已經選擇的單選按鈕，則該值不會更改並保持之前選定的單選按鈕值。

有人能解釋我發生了什麼事嗎？

感謝您的幫助，

[編輯]

這裏是我的枚舉器：

public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) 
    { 
     string parameterString = parameter as string; 
     if (parameterString == null) 
      return DependencyProperty.UnsetValue; 

     if (Enum.IsDefined(value.GetType(), value) == false) 
      return DependencyProperty.UnsetValue; 

     object parameterValue = Enum.Parse(value.GetType(), parameterString, true); 

     return parameterValue.Equals(value); 
    } 


    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) 
    { 
     return value.Equals(true) ? parameter : DependencyProperty.UnsetValue; 
    } 

[/編輯]

Answer 1

這裏是鏈接到文章，這可能有助於您輕鬆完成任務或解決您的問題： Binding RadioButtons to an Enum in Silverlight