C# 多个绑定作为转换器WPF MVVM的参数

我正在尝试更改椭圆的填充笔刷。它不起作用，所以作为一个快速修复，我做了一些体力劳动：

<Ellipse Height="55" Width="55" Grid.Column="1" Grid.Row="1" Fill="DarkGray" 
Visibility="{Binding Model.TransitLow, Converter={StaticResource BoolToVisibilityConverter}}"/>
<Ellipse Height="55" Width="55" Grid.Column="1" Grid.Row="1" Fill="White" 
Visibility="{Binding Model.IndicationHigh, Converter={StaticResource BoolToVisibilityConverter}}"/>
<Ellipse Height="55" Width="55" Grid.Column="1" Grid.Row="1" Fill="DarkGray" 
Visibility="{Binding Model.IndicationLow, Converter={StaticResource BoolToVisibilityConverter}}"/>
<Ellipse Height="55" Width="55" Grid.Column="1" Grid.Row="1" Fill="White" 
Visibility="{Binding Model.High, Converter={StaticResource BoolToVisibilityConverter}}"/>
<Ellipse Height="55" Width="55" Grid.Column="1" Grid.Row="1" Fill="DarkGray" 
Visibility="{Binding Model.Low, Converter={StaticResource BoolToVisibilityConverter}}"/>
<Ellipse Height="55" Width="55" Grid.Column="1" Grid.Row="1" Fill="Red" 
Visibility="{Binding Model.FeedbackError, Converter={StaticResource BoolToVisibilityConverter}}"/>
<Ellipse Height="55" Width="55" Grid.Column="1" Grid.Row="1" Fill="Red" 
Visibility="{Binding Model.FunctionFailed, Converter={StaticResource BoolToVisibilityConverter}}"/>
<Ellipse Height="55" Width="55" Grid.Column="1" Grid.Row="1" Fill="Red" 
Visibility="{Binding Model.LossOfXE, Converter={StaticResource BoolToVisibilityConverter}}"/>

正如你们所看到的，我基本上只是创建了图层，并使用了隐藏和显示算法

理想情况下，所有这些绑定属性都将进入一个转换器，执行逻辑并为一个椭圆返回一个笔刷

理想情况下，我想要这样的东西：

<Ellipse Height="55" Width="55" Grid.Column="1" Grid.Row="1" Fill="{Binding Model.LossOfXE,Model.FunctionFailed....... Converter={StaticResource attrsToBrushConverter}}"/>   

---

假设椭圆的颜色因多种情况而改变，您可以使用

IMultiValueConverter

界面。例如，您有两个按钮，用于确定椭圆的颜色。所以你可以把你的转换器编码成这样

public class EllipseColorConverter : IMultiValueConverter
{
    public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
    {
        bool btn1 = (bool)values[0];
        bool btn2 = (bool)values[1];

        if (btn1 && !btn2)
            return Brushes.Red;
        else if (btn2 && !btn1)
            return Brushes.Blue;
        else if (btn1 && btn2)
            return Brushes.Pink;
        else
            return Brushes.Black;
    }

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

然后在

xaml

中可以实现

 <Window.Resources>
    <local:EllipseColorConverter x:Key="ellipseColorConvert"/>
</Window.Resources>

 <Ellipse Grid.Row="0" Width="100" Height="100">
        <Ellipse.Fill>
            <MultiBinding Converter="{StaticResource ellipseColorConvert}">
                <Binding ElementName="btn1" Path="IsPressed"/>
                <Binding ElementName="btn2" Path="IsPressed"/>
            </MultiBinding>
        </Ellipse.Fill>
    </Ellipse>
    <Button Grid.Row="1" Content="button 1" x:Name="btn1"/>
    <Button Grid.Row="2" Content="button 2" x:Name="btn2"/>

我对WPF的了解并不深刻，但我认为您正在寻找的是一个多值转换器。您所说的“填充椭圆刷”是什么意思？？我认为理想情况下，您不想拥有图层，也不想向椭圆发送可用颜色的列表。您可能需要一些其他类型的控件来告诉代码隐藏更改和更新ellipseI没有代码隐藏，这就是重点。我的意思是填充画笔，用来填充椭圆的画笔。你应该这样做。萨金特先生有个好线索给你