在这种情况下，为每个规则编写一个转换器会将您的业务逻辑放在两个位置（在转换器和视图模型中）。我建议使用 INotifyPropertyChanged 事件为 ViewModel 中的每个控件创建一个属性/标志，以决定该控件是否可见（或其他行为）。
请注意，当您查看我的视图模型（如下）时，您会看到我公开了 bool 和 Visibilty 类型的属性。
如果您需要将该属性用作一般规则，请使用 bool 和 DataTrigger。
public bool ControlD
如果您只需要控制可见性，您可以直接绑定到可见性：
public Visibility ControlA
更新：由于@Wallstreet Programmer 的评论，我添加了另一个选项来使用 BooleanVisibilityConverter。我更新了下面的第五个控件以反映如何使用转换器。我在底部添加了转换器的代码。
这是 XAML 中的测试窗口：
<Window x:Class="ControlVisibleTrigger.Views.MainView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Main Window" Height="400" Width="800">
<Window.Resources>
<Style x:Key="DropDownStyle" TargetType="TextBox">
<Setter Property="Visibility" Value="Hidden"/>
<Style.Triggers>
<DataTrigger Binding="{Binding ControlC}" Value="True">
<Setter Property="Visibility" Value="Visible"/>
</DataTrigger>
</Style.Triggers>
</Style>
</Window.Resources>
<DockPanel>
<Grid>
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
</Grid.RowDefinitions>
<StackPanel Grid.Row="0">
<CheckBox IsChecked="{Binding Path=Alpha,Mode=TwoWay}" Content="Alpha"/>
<CheckBox IsChecked="{Binding Path=Beta,Mode=TwoWay}" Content="Beta"/>
<CheckBox IsChecked="{Binding Path=Gamma,Mode=TwoWay}" Content="Gamma"/>
<CheckBox IsChecked="{Binding Path=Delta,Mode=TwoWay}" Content="Delta"/>
</StackPanel>
<TextBox Grid.Row="1" Visibility="{Binding Path=ControlA}" Text="Binding to visibility"/>
<Button Grid.Row="2" Visibility="{Binding Path=ControlB}" Content="Binding to visibility"/>
<TextBox Grid.Row="3" Style="{StaticResource DropDownStyle}" Text="Using WindowResource DataTrigger"/>
<TextBox Grid.Row="4" Text="Using Local DataTrigger">
<TextBox.Style>
<Style TargetType="TextBox">
<Setter Property="Visibility" Value="Hidden"/>
<Style.Triggers>
<DataTrigger Binding="{Binding ControlD}" Value="True">
<Setter Property="Visibility" Value="Visible"/>
</DataTrigger>
</Style.Triggers>
</Style>
</TextBox.Style>
</TextBox>
<Button Grid.Row="5"
Content="Press me"
Visibility="{Binding Path=ControlE, Converter={StaticResource booleanVisibilityConverter}, ConverterParameter=True, Mode=OneWay}">
</Grid>
</DockPanel>
</Window>
这是视图模型：
public class MainViewModel : ViewModelBase
{
public MainViewModel()
{
}
private bool _alpha = true;
public bool Alpha
{
get
{
return _alpha;
}
set
{
_alpha = value;
OnPropertyChanged("ControlA");
OnPropertyChanged("ControlB");
OnPropertyChanged("ControlC");
OnPropertyChanged("ControlD");
OnPropertyChanged("ControlE");
}
}
private bool _beta = true;
public bool Beta
{
get
{
return _beta;
}
set
{
_beta = value;
OnPropertyChanged("ControlA");
OnPropertyChanged("ControlB");
OnPropertyChanged("ControlC");
OnPropertyChanged("ControlD");
OnPropertyChanged("ControlE");
}
}
private bool _gamma = true;
public bool Gamma
{
get
{
return _gamma;
}
set
{
_gamma = value;
OnPropertyChanged("ControlA");
OnPropertyChanged("ControlB");
OnPropertyChanged("ControlC");
OnPropertyChanged("ControlD");
OnPropertyChanged("ControlE");
}
}
private bool _delta = true;
public bool Delta
{
get
{
return _delta;
}
set
{
_delta = value;
OnPropertyChanged("ControlA");
OnPropertyChanged("ControlB");
OnPropertyChanged("ControlC");
OnPropertyChanged("ControlD");
OnPropertyChanged("ControlE");
}
}
public Visibility ControlA
{
get
{
Visibility result = Visibility.Hidden;
if ( Alpha && (Beta || Gamma))
{
result = Visibility.Visible;
}
return result;
}
}
public Visibility ControlB
{
get
{
Visibility result = Visibility.Hidden;
if ( Delta )
{
result = Visibility.Visible;
}
return result;
}
}
private bool _controlC = false;
public bool ControlC
{
get
{
return Delta || Beta;
}
}
private bool _controlD = false;
public bool ControlD
{
get
{
return Gamma && Alpha && Delta;
}
}
private bool _controlE = false;
public bool ControlE
{
get
{
return Alpha || Gamma;
}
}
}
这是转换器：
public class BooleanVisibilityConverter : IValueConverter
{
public object Convert( object value, Type targetType, object parameter, System.Globalization.CultureInfo culture )
{
if( ( value == null ) || ( !( value is bool ) ) )
return Binding.DoNothing;
Visibility elementVisibility;
bool shouldCollapse = ( ( bool )value );
if( parameter != null )
{
try
{
bool inverse = System.Convert.ToBoolean( parameter );
if( inverse )
shouldCollapse = !shouldCollapse;
}
catch
{
}
}
elementVisibility = shouldCollapse ? Visibility.Collapsed : Visibility.Visible;
return elementVisibility;
}
public object ConvertBack( object value, Type targetType, object parameter, System.Globalization.CultureInfo culture )
{
throw new NotImplementedException();
}
}