WPF 自定义事件处理程序

Question

I have implemented the code for DatePicker https://github.com/cmyksvoll/HighlightDatePicker but I cannot use SelectedDateChanged in WPF with the error ArgumentException: Cannot bind to the target method because its signature or security transparency is not compatible with that of the delegate type

I have tried to create custom Even Handler for "SelectedDateChanged" but the HighlightDatePicker class is static and I cannot register it so that my method will be called in MainWindow

WPF:

<hdp:HighlightDatePicker SelectedDate="{Binding SelectedDate}"  HighlightedDates="{Binding HighlightedDates}" HighlightBrush="LawnGreen" SelectedDateChanged="ProviderDateChanged"/>

My MainWindow method to call:

        public void ProviderDateChanged(object Sender, RoutedEventArgs e)
        { // fetch data to display }

HighlightedDatePicker Class:

    public class HighlightDatePicker : DatePicker
{
     static HighlightDatePicker()
    {
        DefaultStyleKeyProperty.OverrideMetadata(typeof(HighlightDatePicker), new FrameworkPropertyMetadata(typeof(HighlightDatePicker)));


    public static readonly DependencyProperty HighlightedDatesProperty = DependencyProperty.Register("HighlightedDates", typeof(IList<HighlightedDate>), typeof(HighlightDatePicker));



    public IList<HighlightedDate> HighlightedDates
    {
        get { return (IList<HighlightedDate>)GetValue(HighlightedDatesProperty); }
        set { SetValue(HighlightedDatesProperty, value); }
    }

    public static readonly DependencyProperty HighlightBrushProperty = DependencyProperty.Register("HighlightBrush", typeof(Brush),
        typeof(HighlightDatePicker), new PropertyMetadata(Brushes.Orange));

    public Brush HighlightBrush
    {
        get { return (Brush)GetValue(HighlightBrushProperty); }
        set { SetValue(HighlightBrushProperty, value); }
    }
}
public class HighlightedDate
{
    public HighlightedDate(DateTime date, string description)
    {
        Date = date;
        Description = description;
    }

    public DateTime Date { get; set; }
    public string Description { get; set; }
}

Answer 1

The correct signature for the handler method for the SelectedDateChanged event is:

    private void ProviderDateChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
    {
        // fetch data to display
    }