使用多个绑定的C＃WPF IsEnabled？

Question

我有一个描述GUI部分的WPF xaml文件，我希望特定控件的启用/禁用依赖于其他两个文件。该代码看起来是这样的时刻：

<ComboBox Name="MyComboBox" 
      IsEnabled="{Binding ElementName=SomeCheckBox, Path=IsChecked}"/> 

但我想它是依赖于另一复选框，以及所以像：

<ComboBox Name="MyComboBox" 
      IsEnabled="{Binding ElementName=SomeCheckBox&AnotherCheckbox, Path=IsChecked}"/> 

什么是去的最佳途径？我不禁感到我错过了明显的东西，或者以错误的方式去做这件事？

Answer 1

我相信你可能必须使用一个MultiBinding与MultiValueConverter。在这里看到：http://www.developingfor.net/wpf/multibinding-in-wpf.html

这里是一个直接关系例如：http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/5b9cd042-cacb-4aaa-9e17-2d615c44ee22

Answer 2

您可以使用MultiBinding与实现IMultiValueConverter的转换器。

只给一个答案，你可以（几乎）复制&贴：

所需的静态资源：

<converterNamespace:BooleanAndConverter x:Key="booleanAndConverter" /> 

组合框：

<ComboBox Name="MyComboBox"> 
    <ComboBox.IsEnabled> 
    <MultiBinding Converter="{StaticResource booleanAndConverter}"> 
     <Binding ElementName="SomeCheckBox" Path="IsChecked" /> 
     <Binding ElementName="AnotherCheckbox" Path="IsChecked" /> 
    </MultiBinding> 
    </ComboBox.IsEnabled> 
</ComboBox> 

该转换器的代码：

namespace ConverterNamespace 
{ 
    public class BooleanAndConverter : IMultiValueConverter 
    { 
     public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture) 
     { 
      foreach (object value in values) 
      { 
       if ((value is bool) && (bool)value == false) 
       { 
        return false; 
       } 
      } 
      return true; 
     } 
     public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture) 
     { 
      throw new NotSupportedException("BooleanAndConverter is a OneWay converter."); 
     } 
    } 
} 

Answer 3

您也可以尝试同样的短版：

public class BooleanAndConverter : IMultiValueConverter 
{ 
    public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture) 
    { 
     return values.OfType<IConvertible>().All(System.Convert.ToBoolean); 
    } 

    public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture) 
    { 
     throw new NotSupportedException(); 
    } 
} 

public class BooleanOrConverter : IMultiValueConverter 
{ 
    public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture) 
    { 
     return values.OfType<IConvertible>().Any(System.Convert.ToBoolean); 
    } 

    public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture) 
    { 
     throw new NotSupportedException(); 
    } 
} 

，当然，你可能需要知名度的转换器，太：

public class BooleanOrToVisibilityConverter : IMultiValueConverter 
{ 
    public Visibility HiddenVisibility { get; set; } 

    public bool IsInverted { get; set; } 

    public BooleanOrToVisibilityConverter() 
    { 
     HiddenVisibility = Visibility.Collapsed; 
     IsInverted = false; 
    } 

    public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture) 
    { 
     bool flag = values.OfType<IConvertible>().Any(System.Convert.ToBoolean); 
     if (IsInverted) flag = !flag; 
     return flag ? Visibility.Visible : HiddenVisibility; 
    } 

    public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture) 
    { 
     throw new NotImplementedException(); 
    } 
} 

public class BooleanAndToVisibilityConverter : IMultiValueConverter 
{ 
    public Visibility HiddenVisibility { get; set; } 

    public bool IsInverted { get; set; } 

    public BooleanAndToVisibilityConverter() 
    { 
     HiddenVisibility = Visibility.Collapsed; 
     IsInverted = false; 
    } 

    public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture) 
    { 
     bool flag = values.OfType<IConvertible>().All(System.Convert.ToBoolean); 
     if (IsInverted) flag = !flag; 
     return flag ? Visibility.Visible : HiddenVisibility; 
    } 

    public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture) 
    { 
     throw new NotImplementedException(); 
    } 
}