WPF 自定义事件处理程序

问题描述

我已经实现了 DatePicker https://github.com/cmyksvoll/HighlightDatePicker 的代码，但我无法在 WPF 中使用 SelectedDateChanged 并出现错误 ArgumentException: Cannot bind to the target method because its signature or security transparency is not compatible with that of the delegate type

我尝试为“SelectedDateChanged”创建自定义偶数处理程序，但 HighlightDatePicker 类是静态的，我无法注册它，因此将在 MainWindow 中调用我的方法

WPF：

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

我要调用的 MainWindow 方法：

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

HighlightedDatePicker 类：

    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; }
}

解决方法

SelectedDateChanged 事件处理程序方法的正确签名是：

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