时间选择器选中的时间默认类型为：Time = “2/11/2022 12:00:00 AM”

public void Fun(string date){
	//从WPF组件或者组件绑定的对象属性中获取到Time值，本例为绑定了对象student
	var birthday = Student.Birthday;
	try { 
 	   Time = Convert.ToDateTime(StringToDatetime(birthday)).ToString("yyyy-MM-dd HH:mm:ss"); 
	} catch (Exception e){
	    SystemService.MsgBoxService.ShowMsgBox(e.Message);
	    return;
	}
}

//时间格式转换
public DateTime StringToDatetime(string date) {
       return date == string.Empty ? Convert.ToDateTime("0001/1/1") : Convert.ToDateTime(date);
}

转换后的Time格式即为"yyyy-MM-dd HH:mm:ss"格式