【WPF】右下角弹出自定义通知样式（Notification）——简单教程

原文:【WPF】右下角弹出自定义通知样式（Notification）——简单教程

1.先看效果

2.实现

1.主界面是MainWindow

上面就只摆放一个Button即可。在Button的点击事件中需要new一个弹出的NotificationWindow。代码如下：

 public static List<NotificationWindow> _dialogs = new List<NotificationWindow>();
 int i = 0;
 private void Button_Click(object sender, RoutedEventArgs e)
 {
            i++;
            NotifyData data = new WpfApplication1.NotifyData();
            data.Title = "This is Title:"+i;
            data.Content = "content content content content content content content ";

            NotificationWindow dialog = new NotificationWindow();//new 一个通知
            dialog.Closed += Dialog_Closed;
            dialog.TopFrom = GetTopFrom();
            _dialogs.Add(dialog);
            dialog.DataContext = data;//设置通知里要显示的数据
            dialog.Show();
  }
  private void Dialog_Closed(object sender, EventArgs e)
  {
            var closedDialog = sender as NotificationWindow;
            _dialogs.Remove(closedDialog);
  }

其中NotifyData类只有两个属性分别是Title和Content，给NotificationWindow提供所要展示的消息数据。

GetTopFrom方法用来获取弹出通知框的底部应该在WorkArea（工作区）的哪个位置:

 double GetTopFrom()
        {
            //屏幕的高度-底部TaskBar的高度。
            double topFrom = System.Windows.SystemParameters.WorkArea.Bottom - 10;
            bool isContinueFind = _dialogs.Any(o => o.TopFrom == topFrom);

            while (isContinueFind)
            {
                topFrom = topFrom - 100;//此处100是NotifyWindow的高
                isContinueFind = _dialogs.Any(o => o.TopFrom == topFrom);
            }

            if (topFrom <= 0)
                topFrom = System.Windows.SystemParameters.WorkArea.Bottom - 10;

            return topFrom;
        }

2.弹出的通知是一个NotificationWindow

这个Window就一个Image,一个Button，两个TextBlock。

就长这个样子：

---

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• Image用来显示通知的图标，Button用来关闭当前window，两个TextBlock的Text属性分别banding到NotifyData类的Title和Content属性上，用来显示消息的标题和正文。

• 在NotificationWindow中添加如下代码：

public double TopFrom{get; set;}
private void NotificationWindow_Loaded(object sender, RoutedEventArgs e)
{
            NotificationWindow self = sender as NotificationWindow;
            if (self != null)
            {
                self.UpdateLayout();
                SystemSounds.Asterisk.Play();//播放提示声

                double right = System.Windows.SystemParameters.WorkArea.Right;//工作区最右边的值
                self.Top = self.TopFrom - self.ActualHeight;
                DoubleAnimation animation = new DoubleAnimation();
                animation.Duration = new Duration(TimeSpan.FromMilliseconds(NotifyTimeSpan));//NotifyTimeSpan是自己定义的一个int型变量，用来设置动画的持续时间
                animation.From = right;
                animation.To = right - self.ActualWidth;//设定通知从右往左弹出
                self.BeginAnimation(Window.LeftProperty, animation);//设定动画应用于窗体的Left属性

                Task.Factory.StartNew(delegate
                {
                    int seconds = 5;//通知持续5s后消失
                    System.Threading.Thread.Sleep(TimeSpan.FromSeconds(seconds));
                    //Invoke到主进程中去执行
                    Invoke(self, delegate
                    {
                        animation = new DoubleAnimation();
                        animation.Duration = new Duration(TimeSpan.FromMilliseconds(NotifyTimeSpan));
                        animation.Completed += (s, a) => { self.Close(); };//动画执行完毕，关闭当前窗体
                        animation.From = right - self.ActualWidth;
                        animation.To = right;//通知从左往右收回
                        self.BeginAnimation(Window.LeftProperty, animation);
                    });
                });
            }
}
static void Invoke(Window win, Action a)
{
     win.Dispatcher.Invoke(a);
}

上面这段代码注释已经很明白了，没什么好讲的。

• 当Button按钮点击后执行关闭窗体操作,这段代码其实跟上面的类似：

private void ButtonClose_Click(object sender, RoutedEventArgs e)
{
            double right = System.Windows.SystemParameters.WorkArea.Right;
            DoubleAnimation animation = new DoubleAnimation();
            animation.Duration = new Duration(TimeSpan.FromMilliseconds(NotifyTimeSpan));

            animation.Completed += (s, a) => { this.Close(); };
            animation.From = right - this.ActualWidth;
            animation.To = right;
            this.BeginAnimation(Window.LeftProperty, animation);
}

3.结束了，就这么简单

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