控件 xaml

控件 cs

using System;using System.Collections.Generic;using System.Linq;using System.Net;using System.Windows;using System.Windows.Controls;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Animation;using System.Windows.Shapes;namespace neihan8.Control{    public partial class Toast : UserControl    {        public Toast()        {            InitializeComponent();        }        public static readonly DependencyProperty MessageProperty            = DependencyProperty.Register("Message", typeof(string), typeof(Toast), new PropertyMetadata(OnMessageChanged));        public string Message        {            get            {                return (string)GetValue(MessageProperty);            }            set            {                SetValue(MessageProperty, value);            }        }        private static void OnMessageChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)        {            if (d != null && d is Toast)            {                (d as Toast).SetMessage((string)e.NewValue);            }        }        private void SetMessage(string toastBox)        {            message.Text = toastBox;        }    }}

调用控件的类

using System;using System.Net;using System.Windows;using System.Windows.Controls;using System.Windows.Documents;using System.Windows.Ink;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Animation;using System.Windows.Shapes;using neihan8.Control;using System.Windows.Controls.Primitives;using System.Windows.Threading;namespace neihan8{    public class ToastPrompt    {        public event EventHandler Click;        public event EventHandler Completed;        public void Show(string message)        {            Popup p = new Popup();            Toast tb = new Toast() { Message = message };            p.Child = tb;            p.IsOpen = true;            tb.Open.Begin();            DispatcherTimer timer = new DispatcherTimer();            tb.Open.Completed += new EventHandler((sender, eventargs) =>            {                timer.Interval = TimeSpan.FromSeconds(3);                timer.Tick += new EventHandler((sd, ea) =>                {                    if (timer != null && timer.IsEnabled)                    {                        timer.Stop();                        tb.Close.Begin();                    }                });                timer.Start();            });            tb.Close.Completed += new EventHandler((s, e) =>            {                p.IsOpen = false;                if (Completed != null)                    Completed.Invoke(this, new EventArgs());            });            tb.Tap += new EventHandler
      
       ((sender, eventargs) =>            {                if (Click != null)                    Click.Invoke(this, new EventArgs());            });            tb.ManipulationCompleted += new EventHandler
       
        ((sender, eventargs) =>            {                if (eventargs.TotalManipulation.Translation.X > 200 || eventargs.FinalVelocities.LinearVelocity.X > 1000)                {                    if (timer != null && timer.IsEnabled)                    {                        timer.Stop();                        tb.Close.Begin();                    }                }            });        }    }}
       
      

类支持 Completed、Click 事件，支持右划关闭控件

按返回键两次退出程序事例

private bool canexit = false;        public MainPage()        {            InitializeComponent();            this.BackKeyPress += new EventHandler
     
      (MainPage_BackKeyPress);        }        private void MainPage_BackKeyPress(object sender, System.ComponentModel.CancelEventArgs e)        {            e.Cancel = !canexit;            ToastPrompt toast = new ToastPrompt();            toast.Completed += (o, ex) => { canexit = false; };            toast.Show("再按一次退出程序。");            canexit = true;        }