c__ppt_教程Lesson05_Demo

1、复合时间控件示例Demo5_11步骤一 建立复合控件ctlClock;(1)在该复合控件上放置一个Label控件:lblDisplay 一个Timer控件:Maintimer(interval:1000,Enable=true)(2)添加数据成员:private Color colFColor;private Color colBColor;2(3)添加背景色属性方法:public Color ClockBackColor get return colBColor; set colBColor = value; lblDisplay.BackColor = colBColor; 前景色属性方法

2、类似3(4)处理Maintimer的Tick事件protected virtual void Maintimer_Tick(object sender, EventArgs e) lblDisplay.Text = DateTime.Now.ToLongTimeString(); 4步骤二以ctlClock为基类建立复合控件ctlAlarmClock(1)在该复合控件上放置一个Label控件:lblAlarm一个Button控件:btnAlarmOff (2)添加数据成员:private DateTime dteAlarmTime;/存储发出警报的日期和时间值private bool blnA

3、larmSet;/是否设置了警报。private bool blnColorTicker; /颜色变换5(3)添加数据成员dteAlarmTime和blnAlarmSet 的属性方法(AlarmTime和AlarmSet): public DateTime AlarmTime get return dteAlarmTime; set dteAlarmTime = value; 6(3)重写基类的Maintimer_Tick 事件处理函数 protected override void Maintimer_Tick(object sender, System.EventArgs e) base.

4、Maintimer_Tick(sender, e); if (AlarmSet = false) return; else if (AlarmTime.Date = DateTime.Now.Date & AlarmTime.Hour = DateTime.Now.Hour & AlarmTime.Minute = DateTime.Now.Minute ) lblAlarm.Visible = true; 7if (blnColorTicker = false) lblAlarm.BackColor = Color.Red; blnColorTicker = true; else lblAl

5、arm.BackColor = Color.Blue; blnColorTicker = false; else lblAlarm.Visible = false; 8步骤三(1)创建新的Windows应用程序项目; (2)添加控件ctlAlarmClock;DateTimePicker控件;Label控件;(3)处理DateTimePicker控件的ValueChanged事件:private void dtpTest_ValueChanged(object sender, EventArgs e) ctlAlarmClock1.AlarmTime = dtpTest.Value; ctlAlarmClock1.AlarmSet = true