C# 将复选框值作为参数传递给转换器

我的WPF应用程序中有以下代码。我的xaml屏幕有2个控件…复选框按钮和一个文本框

我需要能够触发MandatoryFieldConverter并将复选框值传递给它，以便采取适当的操作。 请问我如何做到这一点

更新：我尝试使用多值转换器，但不起作用：

我尝试了以下操作，但我的转换器代码没有被触发。请告知。谢谢

<CheckBox Name="chkPlaceholder" Command="{Binding PlaceholderCheckboxCommand}" VerticalAlignment="Center" IsChecked="{Binding IsSecurityPlaceholderChecked}" Style="{DynamicResource PlaceholderToggleButtonStyle}" ></CheckBox>

    <TextBox Name="txtUnitFactor" HorizontalAlignment="Left" Height="23" VerticalAlignment="Top" Width="180" TabIndex="1" Text="{Binding CommonSecurityAttributes.UnitFactor,NotifyOnSourceUpdated=True,  UpdateSourceTrigger=PropertyChanged}" Grid.Row="7" Grid.Column="4" >
                <TextBox.Background>

                    <MultiBinding Converter="{StaticResource CustomMandatoryFieldConverter}" UpdateSourceTrigger="PropertyChanged">
                            <Binding ElementName="chkPlaceholder" Path= "IsSecurityPlaceholderChecked" />
                            <Binding ElementName="txtUnitFactor" Path= "CommonSecurityAttributes.UnitFactor" />
                        </MultiBinding>
                </TextBox.Background>
                </TextBox>

---

谢谢您的帮助。

既然您的

复选框已选中
已绑定到
IsSecurityPlaceholderChecked
，那么您应该让转换器直接绑定到视图模型的同一属性，而不是
复选框（显然，它没有
IsSecurityPlaceholderChecked
属性）


您是说要将两个值传递给转换器，
CommonSecurityAttributes.UnitFactor
和
IsSecurityPlaceholderChecked
？如果是这样，您需要的是多转换器（IMultiValueConverter），而不是常规的值转换器。什么是CustomMandaryFieldConverter？你能告诉我它的代码吗？当您说它“不起作用”时，您能确切地告诉我这是什么意思吗？复选框没有
IsSecurityPlaceholderChecked
属性。而是在复选框中将
IsChecked
绑定到
IsSecurityPlaceholderChecked
。您需要绑定
IsChecked
，或者从视图模型中绑定相同的
IsSecurityPlaceholderChecked
。调试时请检查控制台。你可能有绑定错误。注意马特——在你的
@MattBurland中去掉两个元素名。我想他需要的不是颜色，而是画笔<代码>新SolidColorBrush（Colors.BurlyWood）等。
<Converter:CustomMandatoryFieldBackgroundColourConverter x:Key="CustomMandatoryFieldConverter"/>

<CheckBox 
    Name="chkPlaceholder" 
    Command="{Binding PlaceholderCheckboxCommand}" 
    VerticalAlignment="Center" 
    IsChecked="{Binding IsSecurityPlaceholderChecked}" 
    Style="{DynamicResource PlaceholderToggleButtonStyle}" 
    ></CheckBox>

<TextBox 
    HorizontalAlignment="Left" 
    Height="23" 
    VerticalAlignment="Top" 
    Width="180" 
    TabIndex="1" 
    Text="{Binding Price,NotifyOnSourceUpdated=True,  UpdateSourceTrigger=PropertyChanged}" 
    Background="{Binding CommonSecurityAttributes.UnitFactor,Converter ={StaticResource MandatoryFieldConverter}}" 
    Grid.Row="7" 
    Grid.Column="4"  />

public class MandatoryFieldBackgroundColourConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            string defaultBgColor = "BurlyWood";

            try
            {
                if (string.IsNullOrEmpty(value.ToString()))
                {
                    return defaultBgColor;
                }
                else
                {
                    return "LightGreen";
                }
            }
            catch (Exception)
            {
                return defaultBgColor;
            }
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            return value;
        }
    }



public class CustomMandatoryFieldBackgroundColourConverter : IMultiValueConverter
{

    public object Convert(object[] value, Type targetType, object parameter, CultureInfo culture)
    {
        string defaultBgColor = "BurlyWood";
        string validationSuccessColor = "LightGreen";
        bool isPlaceHolderChecked = false;

 if (value == null || value != null && value.Length == 0)
            return defaultBgColor;

        try
        {
            bool result = bool.TryParse(value[1].ToString(), out isPlaceHolderChecked);

            if (isPlaceHolderChecked)
            {
                return validationSuccessColor;
            }

            if (string.IsNullOrEmpty(value.ToString()))
            {
                return defaultBgColor;
            }
            else
            {
                return validationSuccessColor;
            }
        }
        catch (Exception)
        {
            return defaultBgColor;
        }
    }

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

<CheckBox Name="chkPlaceholder" Command="{Binding PlaceholderCheckboxCommand}" VerticalAlignment="Center" IsChecked="{Binding IsSecurityPlaceholderChecked}" Style="{DynamicResource PlaceholderToggleButtonStyle}" ></CheckBox>

    <TextBox Name="txtUnitFactor" HorizontalAlignment="Left" Height="23" VerticalAlignment="Top" Width="180" TabIndex="1" Text="{Binding CommonSecurityAttributes.UnitFactor,NotifyOnSourceUpdated=True,  UpdateSourceTrigger=PropertyChanged}" Grid.Row="7" Grid.Column="4" >
    <TextBox.Background>

        <MultiBinding Converter="{StaticResource CustomMandatoryFieldConverter}" UpdateSourceTrigger="PropertyChanged">
            <Binding Path= "IsSecurityPlaceholderChecked" />
            <Binding Path= "CommonSecurityAttributes.UnitFactor" />
        </MultiBinding>
    </TextBox.Background> 
</TextBox>