WPF 警报控件类似于 StackOverflow
本文关键字:类似于 StackOverflow 控件 WPF | 更新日期: 2023-09-27 18:35:11
查找类似于SO使用Javascript在浏览器顶部显示警报的WPF控件(如此处所述,类似于堆栈溢出功能的通知警报)
有一堆用于通知的 WPF 控件,它们显示在系统托盘上方
http://www.hardcodet.net/projects/wpf-notifyicon
http://nickeandersson.blogs.com/blog/2007/12/a-wpf-desktop-a.html
但是,我希望在当前窗口或用户控件的顶部显示消息,并带有定时淡出,以保持消息本地/相关
我是WPF新手,所以不确定如何将上面链接的控件定位到当前窗口/用户控件的顶部 - 任何提示/指针都值得赞赏
使用 DockPanel 作为窗口内的基本面板。 将用户控件设置为 DockPanel.Dock=Top。 使用另一个面板填充剩余空间。
至于淡出,您可以根据计时器对整个用户控件的不透明度进行动画处理,当不透明度达到 0 时,将可见性设置为折叠,这样它就不会再占用空间。
试试这个。
代码隐藏。
public partial class dtfromdataset : Window
{
public dtfromdataset()
{
InitializeComponent();
this.DataContext = this;
time.Interval = 5000;
time.Elapsed += new ElapsedEventHandler(time_Elapsed);
time.Start();
}
Timer time = new Timer();
void time_Elapsed(object sender, ElapsedEventArgs e)
{
Dispatcher.BeginInvoke(new Action(() =>
{
StatusBarText = "Time is " + DateTime.Now.ToString("ddd-MM-yy HH:mm:ss tt");
}));
}
private DataTable dt = new DataTable();
public string StatusBarText
{
get { return (string)GetValue(StatusBarTextProperty); }
set { SetValue(StatusBarTextProperty, value); }
}
// Using a DependencyProperty as the backing store for StatusBarText. This enables animation, styling, binding, etc...
public static readonly DependencyProperty StatusBarTextProperty =
DependencyProperty.Register("StatusBarText", typeof(string), typeof(dtfromdataset), new UIPropertyMetadata(""));
}
哈姆勒
<Grid Name="stackPanel1">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="224*" />
</Grid.RowDefinitions>
<TextBlock Name="statusText"
Grid.Row="0"
HorizontalAlignment="Stretch"
Background="Silver"
FontSize="20"
Text="{Binding Path=StatusBarText,
NotifyOnTargetUpdated=True}"
TextAlignment="Center">
<TextBlock.Triggers>
<EventTrigger RoutedEvent="Binding.TargetUpdated">
<BeginStoryboard>
<Storyboard>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="Opacity">
<EasingDoubleKeyFrame KeyTime="0" Value="0" />
<EasingDoubleKeyFrame KeyTime="0:0:0.25" Value="1" />
<EasingDoubleKeyFrame KeyTime="0:0:4" Value="1" />
<EasingDoubleKeyFrame KeyTime="0:0:5" Value="0" />
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</TextBlock.Triggers>
</TextBlock>
</Grid>