c# - 如何在 WPF 工具包日历控件中绑定(bind) BlackoutDates？

Question

我想将日期列表绑定(bind)到 BlackoutDates 属性，但这似乎不太可能。特别是在 MVVM 场景中。有没有人完成过这样的事情？是否有适合 MVVM 的良好日历控件？

Answer 1

对于你的 DatePicker 难题，我发现了一个使用附加属性的巧妙 hack(根据我对 CommandBindings 的使用进行了修改):

class AttachedProperties : DependencyObject
{

    #region RegisterBlackoutDates

    // Adds a collection of command bindings to a date picker's existing BlackoutDates collection, since the collections are immutable and can't be bound to otherwise.
    //
    // Usage: <DatePicker hacks:AttachedProperties.RegisterBlackoutDates="{Binding BlackoutDates}" >

    public static DependencyProperty RegisterBlackoutDatesProperty = DependencyProperty.RegisterAttached("RegisterBlackoutDates", typeof(System.Windows.Controls.CalendarBlackoutDatesCollection), typeof(AttachedProperties), new PropertyMetadata(null, OnRegisterCommandBindingChanged));

    public static void SetRegisterBlackoutDates(UIElement element, System.Windows.Controls.CalendarBlackoutDatesCollection value)
    {
        if (element != null)
            element.SetValue(RegisterBlackoutDatesProperty, value);
    }
    public static System.Windows.Controls.CalendarBlackoutDatesCollection GetRegisterBlackoutDates(UIElement element)
    {
        return (element != null ? (System.Windows.Controls.CalendarBlackoutDatesCollection)element.GetValue(RegisterBlackoutDatesProperty) : null);
    }
    private static void OnRegisterCommandBindingChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
    {
        System.Windows.Controls.DatePicker element = sender as System.Windows.Controls.DatePicker;
        if (element != null)
        {
            System.Windows.Controls.CalendarBlackoutDatesCollection bindings = e.NewValue as System.Windows.Controls.CalendarBlackoutDatesCollection;
            if (bindings != null)
            {
                element.BlackoutDates.Clear();
                foreach (var dateRange in bindings)
                {
                    element.BlackoutDates.Add(dateRange);
                }
            }
        }
    }

    #endregion
}

我敢肯定我来不及帮你了，但希望其他人会觉得它有用。