3.Popup 消息弹出框

  • 3.Popup 消息弹出框已关闭评论
  • 46 次浏览
  • A+
所属分类:.NET技术
摘要

 Popup 是一个用于显示临时性内容的控件,它可以在应用程序的其他内容之上显示一个弹出窗口。它通常用于实现下拉菜单、工具提示、通知消息等功能。

 Popup 是一个用于显示临时性内容的控件,它可以在应用程序的其他内容之上显示一个弹出窗口。它通常用于实现下拉菜单、工具提示、通知消息等功能。

主要属性为:

Child:获取或设置 Popup控件的内容。
IsOpen:获取或设置一个值,该值指示Popup 是否可见
Placement:获取或设置 Popup 控件打开时的控件方向,并指定Popup 控件在与屏幕边界重叠时的控件行为
PlacementTarget:获取或设置当打开 Popup 控件时该控件相对于其放置的元素。
PopupAnimation:获取或设置Popup 控件的打开和关闭动画。
StaysOpen:获取或设置一个值,该值指示当 Popup 控件焦点不再对准时,是否关闭该控件。

 

案例:

PopupBox.xaml

<Popup x:Class="WPF.Common.Dialog.PopupBox"              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"               xmlns:d="http://schemas.microsoft.com/expression/blend/2008"               xmlns:local="clr-namespace:WPF.Common.Dialog"              mc:Ignorable="d"               d:DesignHeight="450" d:DesignWidth="800">     <Grid>         <Border x:Name="border" Background="Gray" CornerRadius="8" MinHeight="35" Width="400" Height="100">             <TextBlock TextWrapping="WrapWithOverflow"                        Foreground="White"                        Margin="10"                        FontSize="18"                        HorizontalAlignment="Center"                        VerticalAlignment="Center"                        Text="{Binding Path=Message,RelativeSource={RelativeSource Mode=FindAncestor,AncestorType=local:PopupBox},UpdateSourceTrigger=PropertyChanged}"/>         </Border>     </Grid> </Popup>

PopupBox.xaml.cs

 /// <summary>     /// PopupBox.xaml 的交互逻辑     /// </summary>     public partial class PopupBox : Popup     {         private static PopupBox dialog = new PopupBox();         private static DispatcherTimer timer = new DispatcherTimer();          public PopupBox()         {             InitializeComponent();         }          /// <summary>         /// 弹出对话框         /// </summary>         /// <param name="message">消息</param>         /// <param name="owner">所属窗体对象</param>         /// <param name="seconds">对话框隐藏倒计时(秒)</param>         public static void Show(string message, Window owner = null, int seconds = 1)         {             try             {                 Application.Current.Dispatcher.Invoke(new Action(() =>                 {                     if (owner == null)                     {                         owner = Application.Current.MainWindow;                     }                      dialog.Message = message;                     dialog.PlacementTarget = owner;                     dialog.Placement = PlacementMode.Center;                     dialog.StaysOpen = true;                     dialog.AllowsTransparency = true;                     dialog.VerticalOffset = owner.ActualHeight / 3;                     dialog.Opacity = 0.9;                     dialog.IsOpen = true;                      timer.Tick -= Timer_Tick;                     timer.Tick += Timer_Tick;                     timer.Interval = new TimeSpan(0, 0, seconds);                     timer.Start();                  }));             }             catch             {             }         }          private static void Timer_Tick(object sender, EventArgs e)         {             timer.Stop();             Task.Run(() =>             {                 try                 {                     for (int i = 0; i < 100; i++)                     {                         Thread.Sleep(5);                         if (Application.Current == null) return;                         Application.Current.Dispatcher.Invoke(() =>                         {                             dialog.Opacity -= 0.01;                         });                     }                      Application.Current.Dispatcher.Invoke(() =>                     {                         dialog.IsOpen = false;                         dialog.Message = string.Empty;                     });                 }                 catch                 {                  }             });         }            /// <summary>         /// 依赖属性--透明度         /// </summary>         public new double Opacity         {             get { return (double)GetValue(OpacityProperty); }             set { SetValue(OpacityProperty, value); }         }          public static new readonly DependencyProperty OpacityProperty =             DependencyProperty.Register("Opacity", typeof(double), typeof(PopupBox), new PropertyMetadata(1.0, new PropertyChangedCallback(OnOpacityPropertyChangedCallback)));          private static void OnOpacityPropertyChangedCallback(DependencyObject d, DependencyPropertyChangedEventArgs e)         {             if (!(d is PopupBox box)) return;             if (!(e.NewValue is double v)) return;             box.border.Opacity = v;//赋值新的透明度         }           /// <summary>         /// 依赖属性--消息         /// </summary>         public string Message         {             get { return (string)GetValue(MessageProperty); }             set { SetValue(MessageProperty, value); }         }          public static readonly DependencyProperty MessageProperty =             DependencyProperty.Register("Message", typeof(string), typeof(PopupBox), new PropertyMetadata(string.Empty));          }