字符串到 IsChecked 转换器

在 XAML 中：

<RadioButton IsChecked="{Binding EntityValue, Mode=TwoWay,
                         Converter={StaticResource StringToIsCheckedConverter},
                         ConverterParameter=Male}"
             Content="Male"/>

<RadioButton IsChecked="{Binding EntityValue, Mode=TwoWay,
                         Converter={StaticResource StringToIsCheckedConverter},
                         ConverterParameter=Female}"
             Content="Female"/>

C#类：

public class StringToIsCheckedConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        string input = (string)value;
        string test = (string)parameter;
        return input == test;
    }

    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        if (value == null || !(value is bool))
        {
            return string.Empty;
        }
        if (parameter == null || !(parameter is string))
        {
            return string.Empty;
        }
        if ((bool)value)
        {
            return parameter.ToString();
        }
        else
        {
            return string.Empty;
        }
    }
}