Question

我想通过单击Calendar Control中的日期使用MouseLeftButtonDown来引发事件。但是直到我点击这个组件之外它才会被提升。

这是xaml代码：

<Controls:BasicCalendar Grid.Row="0"
                        x:Name="DemoCalendar" 
                        DisplayDate="{Binding Path=DisplayDate, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
                        HighlightedDateText="{Binding HighlightedDateText, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
                        Grid.Column="0"
                        HorizontalAlignment="Center"
                        VerticalAlignment="Center"
                        Margin="0,0,0,0"
                        DateHighlightBrush="Gold">
  <i:Interaction.Triggers>
      <i:EventTrigger EventName="MouseLeftButtonDown">
          <cal:ActionMessage MethodName="CalendarSelectDateEvent">
             <cal:Parameter Value="{Binding ElementName=DemoCalendar, Path=SelectedDate}" />
            </cal:ActionMessage>
      </i:EventTrigger>
   </i:Interaction.Triggers>
</Controls:BasicCalendar>

以下是点击日历中的某个日期后我要提出的事件：

public void CalendarSelectDateEvent(DateTime selectedDate)
{
  this.ActualCalendarEvents = this.CalendarEvents.Where(x => x.Date >= selectedDate).ToList();

  var a = this.ActualCalendarEvents;
  this.ActualCalendarEvents = null;
  NotifyOfPropertyChange(() => ActualCalendarEvents);
  this.ActualCalendarEvents = a;
  NotifyOfPropertyChange(() => ActualCalendarEvents);
}

当我尝试使用Click事件而不是MouseLeftButtonDown时，Calendar Control自动处理它而不触发CalendarSelectDateEvent。有没有办法解雇这两个事件？（对于Calendar Control选择并突出显示dat，对我来说是CalendarSelectDateEvent）

Answer 1

我已经明白了。最后真的很容易。 Calendar Control具有SelectedDate属性。我刚刚在后面的代码中将SelectedDate绑定到我的属性SelectedDateChanged，当SelectedDate更改时，我引发了事件CalendarSelectDateEvent。

            <Controls:BasicCalendar Grid.Row="0"
                                    x:Name="DemoCalendar" 
                                    DisplayDate="{Binding Path=DisplayDate, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
                                    HighlightedDateText="{Binding HighlightedDateText, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
                                    Grid.Column="0"
                                    HorizontalAlignment="Center"
                                    VerticalAlignment="Center"
                                    Margin="0,0,0,0"
                                    SelectedDate="{Binding SelectedDateChanged}"
                                    DateHighlightBrush="Gold">
            </Controls:BasicCalendar>

像这样：

public DateTime SelectedDateChanged
{
  get
  {
    return selectedDateChanged;
  }

  set
  {
    this.selectedDateChanged = value;
    this.CalendarSelectDateEvent(this.selectedDateChanged);
  }
}

单击组件外部后触发日历MouseLeftButtonDown

1 个答案: