结合单选按钮组在WPF属性 [英] binding radiobuttons group to a property in WPF

问题描述

让我们想象一下，我有：

 ＆LT;单选按钮组名=组1=器isChecked{绑定路径= RadioButton1IsChecked}/＆GT;
＆LT;单选按钮组名=组1=器isChecked{绑定路径= RadioButton2IsChecked}/＆GT;
 

然后在我的数据源类我有：

 公共BOOL Rad​​ioButton1IsChecked {搞定;组; }
公共BOOL Rad​​ioButton2IsChecked {搞定;组; }
公共枚举单选按钮{RadioButton1，RadioButton2，无}
公众的RadioButtons SelectedRadioButton
{
    得到
    {
        如果（this.RadioButtonIsChecked）
            返回RadioButtons.RadioButton1;
        否则，如果（this.RadioButtonIsChecked）
            返回RadioButtons.RadioButton2;
        其他
            返回RadioButtons.None;
     }
}
 

我可以以某种方式直接绑定我的单选按钮 SelectedRadioButton 属性？我真的需要 RadioButton1IsChecked 和 RadioButton2IsChecked 属性只计算选定的单选按钮。

解决方案

 ＆LT;单选按钮组名=组1器isChecked ={绑定路径= SelectedRadioButton，转换器= {StaticResource的EnumBooleanConverter}， ConverterParameter = RadioButton1}/＆GT;
＆LT;单选按钮组名=组1=器isChecked{绑定路径= SelectedRadioButton，转换器= {StaticResource的EnumBooleanConverter}，ConverterParameter = RadioButton2}/＆GT;
 

公共枚举单选按钮{RadioButton1，RadioButton2，无}
公共单选按钮SelectedRadioButton {获取;集;} 公共类EnumBooleanConverter：的IValueConverter
    {
        公共对象转换（对象的值，类型TARGETTYPE，对象参数，CultureInfo的文化）
        {
            VAR ParameterString =参数作为字符串;
            如果（ParameterString == NULL）
                返回DependencyProperty.UnsetValue;            如果（Enum.IsDefined（value.GetType（），价值）== FALSE）
                返回DependencyProperty.UnsetValue;            对象paramvalue = Enum.Parse（value.GetType（），ParameterString）;
            返回paramvalue.Equals（值）;
        }        公共对象ConvertBack（对象的值，类型TARGETTYPE，对象参数，CultureInfo的文化）
        {
            VAR ParameterString =参数作为字符串;
            VAR valueAsBool =（布尔）值;            如果（ParameterString == NULL ||！valueAsBool）
            {
                尝试
                {
                    返回Enum.Parse（TARGETTYPE，0）;
                }
                赶上（例外）
                {
                    返回DependencyProperty.UnsetValue;
                }
            }
            返回Enum.Parse（TARGETTYPE，ParameterString）;
        }
    }


Let's imagine that I have:

<RadioButton GroupName="Group1" IsChecked="{Binding Path=RadioButton1IsChecked}" />
<RadioButton GroupName="Group1" IsChecked="{Binding Path=RadioButton2IsChecked}" />

And then in my data source class I have:

public bool RadioButton1IsChecked { get; set; }
public bool RadioButton2IsChecked { get; set; }
public enum RadioButtons { RadioButton1, RadioButton2, None }
public RadioButtons SelectedRadioButton
{
    get
    {
        if (this.RadioButtonIsChecked) 
            return RadioButtons.RadioButton1;
        else if (this.RadioButtonIsChecked) 
            return RadioButtons.RadioButton2;
        else 
            return RadioButtons.None;
     }
}

Can I somehow bind my radio buttons directly to SelectedRadioButton property? I really need RadioButton1IsChecked and RadioButton2IsChecked properties only to calculate the selected radiobutton.

解决方案

<RadioButton GroupName="Group1" IsChecked="{Binding Path=SelectedRadioButton, Converter={StaticResource EnumBooleanConverter}, ConverterParameter=RadioButton1}" />
<RadioButton GroupName="Group1" IsChecked="{Binding Path=SelectedRadioButton, Converter={StaticResource EnumBooleanConverter}, ConverterParameter=RadioButton2}" />

public enum RadioButtons { RadioButton1, RadioButton2, None }
public RadioButtons SelectedRadioButton {get;set;}

 public class EnumBooleanConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            var ParameterString = parameter as string;
            if (ParameterString == null)
                return DependencyProperty.UnsetValue;

            if (Enum.IsDefined(value.GetType(), value) == false)
                return DependencyProperty.UnsetValue;

            object paramvalue = Enum.Parse(value.GetType(), ParameterString);
            return paramvalue.Equals(value);
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            var ParameterString = parameter as string;
            var valueAsBool = (bool) value;

            if (ParameterString == null || !valueAsBool)
            {
                try
                {
                    return Enum.Parse(targetType, "0");
                }
                catch (Exception)
                {
                    return DependencyProperty.UnsetValue;
                }
            }
            return Enum.Parse(targetType, ParameterString);
        }
    }

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