從發件人獲取選定日期

Question

我想從對象發件人中獲取選定日期並將該日期傳遞給其他方法。所以，如何從發件人對象獲取日期。

我的C＃代碼;

public partial class MonthView : MetroWindow 
{ 
    AppController a=new AppController(); 


    public MonthView() 
    { 
     InitializeComponent(); 
     calMain.DisplayDate = DateTime.Today; 
    } 

    public void calItemSelectedDate(object sender, SelectionChangedEventArgs e) 
    { 
     //sender = calMain.SelectedDate; 
     //DateTime d = (DateTime)sender; 
     //a.fetchAndPopulateForDate(d);   <------I want code here. 
     //DayView Activity = new DayView(); 
     //Activity.Show(); 
     //this.Close(); 

    } 

} 

Answer 1

sender始終是引發事件的控件。在這種情況下，它是Calendar。所以accordidngly投它：

public void calItemSelectedDate(object sender, SelectionChangedEventArgs e) 
{ 
    Calendar cal = (Calendar)sender; 
    DateTime d = cal.SelectedDate; 
    a.fetchAndPopulateForDate(d); <------I want code here. 
    // ... 
} 

（但是，因爲你可以還可以通過直接calMain.SelectedDate訪問我真的不明白的問題）