WPF实现上下滚动字幕效果

<local:WorkSpaceContent x:Class="SunCreate.CombatPlatform.Client.NoticeMarquee"  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:SunCreate.CombatPlatform.Client;assembly=SunCreate.CombatPlatform.Client"  mc:Ignorable="d"   d:DesignHeight="35" d:DesignWidth="300" Loaded="WorkSpaceContent_Loaded" MouseEnter="WorkSpaceContent_MouseEnter" MouseLeave="WorkSpaceContent_MouseLeave"> <local:WorkSpaceContent.Resources> <ControlTemplate x:Key="btnTemplate" TargetType="Button">  <TextBlock Name="txt" Margin="5 0 5 0" Text="{TemplateBinding Content}" FontSize="12" Cursor="Hand" ToolTip="{TemplateBinding ToolTip}" Foreground="#fff" VerticalAlignment="Center"></TextBlock>  <ControlTemplate.Triggers>  <Trigger Property="IsMouseOver" Value="true">   <Setter TargetName="txt" Property="Foreground" Value="#ff5e5e"></Setter>  </Trigger>  </ControlTemplate.Triggers> </ControlTemplate> <Storyboard x:Key="storyboard">  <DoubleAnimation Duration="0:0:1" To="25" Storyboard.TargetName="stackPanel" Storyboard.TargetProperty="RenderTransform.Y"/> </Storyboard> </local:WorkSpaceContent.Resources> <Grid Background="#00a6da"> <Grid.ColumnDefinitions>  <ColumnDefinition Width="60"></ColumnDefinition>  <ColumnDefinition></ColumnDefinition> </Grid.ColumnDefinitions> <TextBlock Margin="15 0 5 0" Text="公告：" FontSize="12" Foreground="#ffff33" VerticalAlignment="Center"></TextBlock> <ScrollViewer Grid.Column="1" Name="scrollViewer" HorizontalScrollBarVisibility="Hidden"   HorizontalContentAlignment="Stretch"   VerticalScrollBarVisibility="Hidden"   VerticalContentAlignment="Stretch" Height="25">  <Border Height="25" >  <StackPanel x:Name="stackPanel" Margin="0 -25 0 0" >   <StackPanel.RenderTransform>   <TranslateTransform />   </StackPanel.RenderTransform>   <Button Name="btn1" Height="25" Click="btn_Click" Template="{StaticResource btnTemplate}"></Button>   <Button Name="btn2" Height="25" Click="btn_Click" Template="{StaticResource btnTemplate}"></Button>   <Button Name="btn3" Height="25" Click="btn_Click" Template="{StaticResource btnTemplate}"></Button>  </StackPanel>  </Border> </ScrollViewer> </Grid></local:WorkSpaceContent>

using SunCreate.CombatPlatform.Domain;using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading;using System.Timers;using System.Windows;using System.Windows.Controls;using System.Windows.Data;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Animation;using System.Windows.Media.Imaging;using System.Windows.Navigation;using System.Windows.Shapes;namespace SunCreate.CombatPlatform.Client{ /// <summary> /// 公告滚动显示 /// </summary> public partial class NoticeMarquee : WorkSpaceContent { private System.Timers.Timer _timer; private List<TES_NOTICE> _data; private int _index; private Storyboard _storyboard; public NoticeMarquee() {  InitializeComponent(); } private void WorkSpaceContent_Loaded(object sender, RoutedEventArgs e) {  if (_timer == null)  {  _storyboard = (Storyboard)this.FindResource("storyboard");  System.Threading.Tasks.Task.Factory.StartNew(() =>  {   while (true)   {   int total = 0;   _data = HI.Get<INoticeService>().GetListPage(null, DateTime.MinValue, DateTime.Now, 1, 3, ref total).ToList();   _data.Reverse();   _index = _data.Count - 1;   Dispatcher.BeginInvoke(new Action(() =>   {    stackPanel.RenderTransform = new TranslateTransform(0, 25);   }));   ShowData();   Thread.Sleep(60 * 1000);   }  });  _timer = new System.Timers.Timer();  _timer.Interval = 5000;  _timer.Elapsed += Action;  _timer.Start();  } } private void Action(object sender, ElapsedEventArgs e) {  Dispatcher.BeginInvoke(new Action(() =>  {  stackPanel.RenderTransform = new TranslateTransform(0, 0);  _storyboard.Begin();  }));  _index--;  if (_index < 0)  {  _index = _data.Count - 1;  }  ShowData(); } private void ShowData() {  Dispatcher.BeginInvoke(new Action(() =>  {  TES_NOTICE data1 = GetData(_index, 0);  TES_NOTICE data2 = GetData(_index, 1);  TES_NOTICE data3 = GetData(_index, 2);  if (data1 != null)  {   btn1.Content = data1.NOTICE_CONTENT.Trim().Replace("/r/n", string.Empty);   btn1.CommandParameter = data1.ID;   btn1.ToolTip = data1.NOTICE_CONTENT;  }  if (data2 != null)  {   btn2.Content = data2.NOTICE_CONTENT.Trim().Replace("/r/n", string.Empty);   btn2.CommandParameter = data2.ID;   btn2.ToolTip = data2.NOTICE_CONTENT;  }  if (data3 != null)  {   btn3.Content = data3.NOTICE_CONTENT.Trim().Replace("/r/n", string.Empty);   btn3.CommandParameter = data3.ID;   btn3.ToolTip = data3.NOTICE_CONTENT;  }  })); } private TES_NOTICE GetData(int index, int n) {  if (_data != null)  {  int i = index + n;  if (i > _data.Count - 1)  {   i = i % _data.Count;  }  return _data[i];  }  return null; } private void WorkSpaceContent_MouseEnter(object sender, MouseEventArgs e) {  _timer.Stop(); } private void WorkSpaceContent_MouseLeave(object sender, MouseEventArgs e) {  _timer.Start(); } private void btn_Click(object sender, RoutedEventArgs e) {  Button btn = e.Source as Button;  string dataId = btn.CommandParameter.ToString();  NoticeView noticeView = new NoticeView(dataId);  noticeView.WindowStartupLocation = WindowStartupLocation.CenterScreen;  noticeView.ShowDialog(); } }}