WPF中繼控制

Question

我有以下工作代碼：

<StackPanel> 
     <TextBlock FontSize="14" Foreground="White" Text="Case Type: " TextDecorations="Underline"/> 
     <RadioButton IsChecked="{Binding CaseType, Converter={StaticResource MyEnumToBooleanConverter}, ConverterParameter={x:Static order:CaseTypeEnum.TypeA}}" 
        Style="{StaticResource ToggleButtonStyle}" 
        Content="{Binding CaseType, Converter={StaticResource MyEnumDescriptionConverter}, ConverterParameter={x:Static order:CaseTypeEnum.TypeA}}" /> 
     <RadioButton IsChecked="{Binding CaseType, Converter={StaticResource MyEnumToBooleanConverter}, ConverterParameter={x:Static order:CaseTypeEnum.TypeB}}" 
        Style="{StaticResource ToggleButtonStyle}" 
        Content="{Binding CaseType, Converter={StaticResource MyEnumDescriptionConverter}, ConverterParameter={x:Static order:CaseTypeEnum.TypeB}}" /> 
     ... 
     ... 
     ... 
     <RadioButton IsChecked="{Binding CaseType, Converter={StaticResource MyEnumToBooleanConverter}, ConverterParameter={x:Static order:CaseTypeEnum.TypeJ}}" 
        Style="{StaticResource ToggleButtonStyle}" 
        Content="{Binding CaseType, Converter={StaticResource MyEnumDescriptionConverter}, ConverterParameter={x:Static order:CaseTypeEnum.TypeJ}}" /> 
</StackPanel> 

有沒有辦法做同樣的功能，而無需複製/粘貼:)

Answer 1

好了不知道你的邏輯，我不能，如果你真的驗證需要兩個值進入轉換器，其中1對於每個項目都是相同的。

但是假設你確實確實需要他們：

XAML：

<StackPanel> 
    <ItemsControl ItemsSource="{Binding Items}"> 
    <ItemsControl.Resources> 
     <local:MyEnumDescriptionConverter x:Key="MyEnumDescriptionConverter" /> 
     <local:MyEnumToBooleanConverter x:Key="MyEnumToBooleanConverter" /> 
    </ItemsControl.Resources> 
    <ItemsControl.ItemTemplate> 
     <DataTemplate> 
     <RadioButton> 
      <RadioButton.Content> 
      <MultiBinding Converter="{StaticResource MyEnumDescriptionConverter}"> 
       <Binding Path="." /> 
       <Binding Path="DataContext.CaseType" 
         RelativeSource="{RelativeSource FindAncestor, 
                 AncestorType={x:Type ItemsControl}}" /> 
      </MultiBinding> 
      </RadioButton.Content> 
      <RadioButton.IsChecked> 
      <MultiBinding Converter="{StaticResource MyEnumToBooleanConverter}"> 
       <Binding Path="." /> 
       <Binding Path="DataContext.CaseType" 
         RelativeSource="{RelativeSource FindAncestor, 
                 AncestorType={x:Type ItemsControl}}" /> 
      </MultiBinding> 
      </RadioButton.IsChecked> 
     </RadioButton> 
     </DataTemplate> 
    </ItemsControl.ItemTemplate> 
    </ItemsControl> 
</StackPanel> 

從頂部開始：

Items被定義爲：

public List<CaseTypeEnum> Items { 
    get { 
    return Enum.GetValues(typeof(CaseTypeEnum)).Cast<CaseTypeEnum>().ToList(); 
    } 
} 

和

private CaseTypeEnum _caseType; 
public CaseTypeEnum CaseType { 
    get { 
    return _caseType; 
    } 
    set { 
    if (value == _caseType) 
     return; 
    _caseType = value; 
    RaisePropertyChanged(() => CaseType); 
    } 
} 

枚舉：

public enum CaseTypeEnum{ 
    TypeA, 
    TypeB, 
    TypeC, 
    TypeD, 
    TypeE, 
    TypeF, 
    TypeG, 
    TypeH, 
    TypeI, 
    TypeJ, 
} 

至於兩MultiBinding的，我只是把一些虛擬的代碼一樣

MyEnumDescriptionConverter -

public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture) { 
    if (values.Length < 2) 
    return string.Empty; 
    return string.Format("Formatted {0} with CaseType property: {1}", (CaseTypeEnum)values[0], (CaseTypeEnum)values[1]); 
} 

和MyEnumToBooleanConverter

public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture) { 
    if (values.Length < 2) 
    return false; 
    return ((CaseTypeEnum)values[0]).ToString().EndsWith("D"); 
} 

這應該給你運行時：

您也可以下載樣本Here