Question

我正在编写一个有两种可能性的程序：Set Time＆amp;手动日期，或使用计算机/系统时间＆amp;日期。

所以现在我需要制作两个互斥的Checkbox。如果选择一个，则必须取消选中另一个。如何在MVVM中实现这一点？

<CheckBox Name="UseSystemTime" Margin="7"  Content="Use System Time and Date settings (Time, Date, DST, Timezone)" IsChecked="{Binding UseSystemTime}"/>
<CheckBox Name="ManualTime" Margin="7"  Content="Set settings Manually" IsChecked="{Binding SetSettingsManually}"/>

有没有办法在XAML中执行此操作？

WPF coding mutually exclusive Checkboxes with Data Binding

谢谢！

Answer 1

在你只有2 checkboxes的情况下，我只会在我的viewmodel中为ManualTime引入一个bool-property。

public bool IsManualTimeUsed
{
   // get;set with property-changed 
}

然后在用户界面中，您有两个机会：

机会1：

 <CheckBox Name="UseSystemTime" Margin="7" Content="Use System Time and Date settings (Time, Date, DST, Timezone)" 
           IsChecked="{Binding IsManualTimeUsed, Converter{converterNamespace:InverseBoolConverter}}"/>
 <CheckBox Name="ManualTime" Margin="7" Content="Set settings Manually" 
           IsChecked="{Binding IsManualTimeUsed}"/>

InverseBoolConverter的外观如下：

public class InverseBoolConverter : MarkupExtension, IValueConverter
{
    private static InverseBoolConverter converter;

    public InverseBoolConverter()
    {

    }

    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        if (value is bool)
            return !((bool) value);
        return value;
    }

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

    public override object ProvideValue(IServiceProvider serviceProvider)
    {
        return converter ?? (converter = new InverseBoolConverter());
    }
}

机会2

<CheckBox Name="UseSystemTime" Margin="7" Content="Use System Time and Date settings (Time, Date, DST, Timezone)" 
          IsChecked="{Binding ElementName=ManualTime, Path=IsChecked, Converter={converterNamespace:InverseBoolConverter}}"/>
<CheckBox Name="ManualTime" Margin="7" Content="Set settings Manually" 
          IsChecked="{Binding IsManualTimeUsed}"/>

与机会1中的转换器相同

Answer 2

您可以从IValueConverter接口实现BootToCheckBoxConvertor并传递ConvertorParameter以选中取消选中复选框。

http://blogs.msdn.com/b/bencon/archive/2006/05/10/594886.aspx

Answer 3

但是复选框的形式更漂亮（更加用户友好） - 我想是这样:)我宁愿使用复选框，或者可以将radiobutton的形状更改为复选框形式？ :)用checkmark和everythink？：）

您可以为RadioButton创建一个样式，使其看起来像CheckBox：

    <Style x:Key="FocusVisual">
        <Setter Property="Control.Template">
            <Setter.Value>
                <ControlTemplate>
                    <Rectangle Margin="2" SnapsToDevicePixels="true" Stroke="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}" StrokeThickness="1" StrokeDashArray="1 2"/>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
    <SolidColorBrush x:Key="OptionMark.Static.Background" Color="#FFFFFFFF"/>
    <SolidColorBrush x:Key="OptionMark.Static.Border" Color="#FF707070"/>
    <Style x:Key="OptionMarkFocusVisual">
        <Setter Property="Control.Template">
            <Setter.Value>
                <ControlTemplate>
                    <Rectangle Margin="14,0,0,0" SnapsToDevicePixels="true" Stroke="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}" StrokeThickness="1" StrokeDashArray="1 2"/>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
    <SolidColorBrush x:Key="OptionMark.MouseOver.Background" Color="#FFF3F9FF"/>
    <SolidColorBrush x:Key="OptionMark.MouseOver.Border" Color="#FF5593FF"/>
    <SolidColorBrush x:Key="OptionMark.MouseOver.Glyph" Color="#FF212121"/>
    <SolidColorBrush x:Key="OptionMark.Disabled.Background" Color="#FFE6E6E6"/>
    <SolidColorBrush x:Key="OptionMark.Disabled.Border" Color="#FFBCBCBC"/>
    <SolidColorBrush x:Key="OptionMark.Disabled.Glyph" Color="#FF707070"/>
    <SolidColorBrush x:Key="OptionMark.Pressed.Background" Color="#FFD9ECFF"/>
    <SolidColorBrush x:Key="OptionMark.Pressed.Border" Color="#FF3C77DD"/>
    <SolidColorBrush x:Key="OptionMark.Pressed.Glyph" Color="#FF212121"/>
    <SolidColorBrush x:Key="OptionMark.Static.Glyph" Color="#FF212121"/>
    <Style x:Key="CheckBoxRadioButtonStyle" TargetType="{x:Type RadioButton}">
        <Setter Property="FocusVisualStyle" Value="{StaticResource FocusVisual}"/>
        <Setter Property="Background" Value="{StaticResource OptionMark.Static.Background}"/>
        <Setter Property="BorderBrush" Value="{StaticResource OptionMark.Static.Border}"/>
        <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
        <Setter Property="BorderThickness" Value="1"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type RadioButton}">
                    <Grid x:Name="templateRoot" Background="Transparent" SnapsToDevicePixels="True">
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="Auto"/>
                            <ColumnDefinition Width="*"/>
                        </Grid.ColumnDefinitions>
                        <Border x:Name="checkBoxBorder" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="1" VerticalAlignment="{TemplateBinding VerticalContentAlignment}">
                            <Grid x:Name="markGrid">
                                <Path x:Name="optionMark" Data="F1 M 9.97498,1.22334L 4.6983,9.09834L 4.52164,9.09834L 0,5.19331L 1.27664,3.52165L 4.255,6.08833L 8.33331,1.52588e-005L 9.97498,1.22334 Z " Fill="{StaticResource OptionMark.Static.Glyph}" Margin="1" Opacity="0" Stretch="None"/>
                                <Rectangle x:Name="indeterminateMark" Fill="{StaticResource OptionMark.Static.Glyph}" Margin="2" Opacity="0"/>
                            </Grid>
                        </Border>
                        <ContentPresenter x:Name="contentPresenter" Grid.Column="1" Focusable="False" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
                    </Grid>
                    <ControlTemplate.Triggers>
                        <Trigger Property="HasContent" Value="true">
                            <Setter Property="FocusVisualStyle" Value="{StaticResource OptionMarkFocusVisual}"/>
                            <Setter Property="Padding" Value="4,-1,0,0"/>
                        </Trigger>
                        <Trigger Property="IsMouseOver" Value="true">
                            <Setter Property="Background" TargetName="checkBoxBorder" Value="{StaticResource OptionMark.MouseOver.Background}"/>
                            <Setter Property="BorderBrush" TargetName="checkBoxBorder" Value="{StaticResource OptionMark.MouseOver.Border}"/>
                            <Setter Property="Fill" TargetName="optionMark" Value="{StaticResource OptionMark.MouseOver.Glyph}"/>
                            <Setter Property="Fill" TargetName="indeterminateMark" Value="{StaticResource OptionMark.MouseOver.Glyph}"/>
                        </Trigger>
                        <Trigger Property="IsEnabled" Value="false">
                            <Setter Property="Background" TargetName="checkBoxBorder" Value="{StaticResource OptionMark.Disabled.Background}"/>
                            <Setter Property="BorderBrush" TargetName="checkBoxBorder" Value="{StaticResource OptionMark.Disabled.Border}"/>
                            <Setter Property="Fill" TargetName="optionMark" Value="{StaticResource OptionMark.Disabled.Glyph}"/>
                            <Setter Property="Fill" TargetName="indeterminateMark" Value="{StaticResource OptionMark.Disabled.Glyph}"/>
                        </Trigger>
                        <Trigger Property="IsPressed" Value="true">
                            <Setter Property="Background" TargetName="checkBoxBorder" Value="{StaticResource OptionMark.Pressed.Background}"/>
                            <Setter Property="BorderBrush" TargetName="checkBoxBorder" Value="{StaticResource OptionMark.Pressed.Border}"/>
                            <Setter Property="Fill" TargetName="optionMark" Value="{StaticResource OptionMark.Pressed.Glyph}"/>
                            <Setter Property="Fill" TargetName="indeterminateMark" Value="{StaticResource OptionMark.Pressed.Glyph}"/>
                        </Trigger>
                        <Trigger Property="IsChecked" Value="true">
                            <Setter Property="Opacity" TargetName="optionMark" Value="1"/>
                            <Setter Property="Opacity" TargetName="indeterminateMark" Value="0"/>
                        </Trigger>
                        <Trigger Property="IsChecked" Value="{x:Null}">
                            <Setter Property="Opacity" TargetName="optionMark" Value="0"/>
                            <Setter Property="Opacity" TargetName="indeterminateMark" Value="1"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

并像这样使用它：

<RadioButton Style="{StaticResource CheckBoxRadioButtonStyle}" />

（我刚使用默认的CheckBox样式并更改了目标类型）

但是，我强烈建议您使用普通的单选按钮，因为用户熟悉它。相互独立的复选框可能会让用户感到奇怪。

互斥复选框 - C＃，MVVM

3 个答案: