private void Btn_Click(object sender, RoutedEventArgs e) { if ((sender as Button).Tag != null) { UcListSum.Remove((((sender as Button).Tag as UIElementCollection)[0] as UserControl)); } if (UcListSum.Count == Uc_Count)//当列表数和要展示的数目相同的时候，就停止掉动画效果 { storyboard_imgs.Completed -= Storyboard_imgs_Completed; storyboard_imgs.Stop(); for (int i = 0; i < Uc_Count; i++) { UcListForShow[i].Children.Clear(); if (UcListSum[i].Parent != null) { (UcListSum[i].Parent as Grid).Children.Clear(); } UcListForShow[i].Children.Add(UcListSum[i]); } return; } }
所有代码如下：
using System; using System.Collections.Generic; using System.Linq; using System.Text; 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 MarqueeUserControl { /// <summary> /// MarqueeUC.xaml 的交互逻辑 /// </summary> public partial class MarqueeUC : UserControl { ResourceDictionary dictionary; public MarqueeUC() { InitializeComponent(); //读取样式文件 dictionary = new ResourceDictionary { Source = new Uri("/MarqueeUserControl;component/MarqueeUserControlDictionary.xaml", UriKind.Relative) }; } #region 属性 private int _uc_Count = 0; /// <summary> /// 用来展示几个 /// </summary> public int Uc_Count { get { return _uc_Count; } set { _uc_Count = value; } } private List<Grid> _ucListForShow = new List<Grid>(); /// <summary> /// 用来展示的控件列表 /// </summary> private List<Grid> UcListForShow { get { return _ucListForShow; } set { _ucListForShow = value; } } private List<UserControl> _ucListSum = new List<UserControl>(); /// <summary> /// 要添加的控件的列表 /// </summary> public List<UserControl> UcListSum { get { return _ucListSum; } set { _ucListSum = value; } } #endregion Canvas canvas_board = new Canvas(); Storyboard storyboard_imgs = new Storyboard(); int scroll_index = 0;//滚动索引 double scroll_width;//滚动宽度 void GridLayout() { if (Uc_Count == 0)//如果这个值没有赋值的话，则默认显示四个 { Uc_Count = 4; } //给Canvas设置一些属性 canvas_board.VerticalAlignment = VerticalAlignment.Stretch; canvas_board.HorizontalAlignment = HorizontalAlignment.Stretch; canvas_board.Width = this.viewbox_main.ActualWidth; canvas_board.Height = this.viewbox_main.ActualHeight; canvas_board.ClipToBounds = true; //用viewbox可以支持拉伸 this.viewbox_main.Child = canvas_board; //循环将Grid加入到要展示的列表里 for (int i = 0; i < Uc_Count + 1; i++) { Grid grid = new Grid(); grid.Width = canvas_board.Width / Uc_Count - 10; grid.Height = canvas_board.Height - 10; grid.Margin = new Thickness(5); this.canvas_board.Children.Add(grid); grid.SetValue(Canvas.TopProperty, 0.0); grid.SetValue(Canvas.LeftProperty, i * (grid.Width + 10)); UcListForShow.Add(grid); } } void StoryLoad() { for (int i = 0; i < UcListForShow.Count; i++) {//设置滚动时候的效果 DoubleAnimationUsingKeyFrames daukf_uc = new DoubleAnimationUsingKeyFrames(); LinearDoubleKeyFrame k1_uc = new LinearDoubleKeyFrame(i * (UcListForShow[i].Width + 10), KeyTime.FromTimeSpan(TimeSpan.FromSeconds(2))); LinearDoubleKeyFrame k2_uc = new LinearDoubleKeyFrame((i - 1) * (UcListForShow[i].Width + 10), KeyTime.FromTimeSpan(TimeSpan.FromSeconds(2.5))); daukf_uc.KeyFrames.Add(k1_uc); daukf_uc.KeyFrames.Add(k2_uc); storyboard_imgs.Children.Add(daukf_uc); Storyboard.SetTarget(daukf_uc, UcListForShow[i]); Storyboard.SetTargetProperty(daukf_uc, new PropertyPath("(Canvas.Left)")); } storyboard_imgs.FillBehavior = FillBehavior.Stop; storyboard_imgs.Completed += Storyboard_imgs_Completed; storyboard_imgs.Begin(); } private void Storyboard_imgs_Completed(object sender, EventArgs e) { scroll_index = scroll_index + 1 - Uc_Count; for (int i = 0; i < UcListForShow.Count; i++) { UcListForShow[i].SetValue(Canvas.LeftProperty, i * (UcListForShow[i].Width + 10)); UserControl uc; if (i == UcListForShow.Count - 1) { uc = UcListSum[scroll_index % UcListSum.Count]; } else { uc = UcListSum[scroll_index++ % UcListSum.Count]; } if (uc.Parent != null) { (uc.Parent as Grid).Children.Clear();//将Usercontrol从原来的里面移除掉，要不然会抛错，Usercontrol已属于另一个控件 } UcListForShow[i].Children.Clear(); UcListForShow[i].Children.Add(uc); //将隐藏按钮加入到Grid里 Button btn = new Button(); btn.Style = (dictionary["hidenStyle"] as Style);//从样式文件里读取到Button的样式 btn.Tag = UcListForShow[i].Children;//给Tag赋值，这样方便查找 btn.Click += Btn_Click;//注册隐藏事件 UcListForShow[i].Children.Add(btn); } storyboard_imgs.Begin(); } private void Btn_Click(object sender, RoutedEventArgs e) { if ((sender as Button).Tag != null) { UcListSum.Remove((((sender as Button).Tag as UIElementCollection)[0] as UserControl)); } if (UcListSum.Count == Uc_Count)//当列表数和要展示的数目相同的时候，就停止掉动画效果 { storyboard_imgs.Completed -= Storyboard_imgs_Completed; storyboard_imgs.Stop(); for (int i = 0; i < Uc_Count; i++) { UcListForShow[i].Children.Clear(); if (UcListSum[i].Parent != null) { (UcListSum[i].Parent as Grid).Children.Clear(); } UcListForShow[i].Children.Add(UcListSum[i]); } return; } } public void StartMar() { GridLayout(); scroll_width = this.canvas_board.Width; for (int i = 0; i < UcListForShow.Count; i++) { UserControl uc; if (i == UcListForShow.Count - 1) { uc = UcListSum[scroll_index % UcListSum.Count]; } else { uc = UcListSum[scroll_index++ % UcListSum.Count]; } if (uc.Parent != null) { (uc.Parent as Grid).Children.Clear(); } UcListForShow[i].Children.Clear(); UcListForShow[i].Children.Add(uc); } StoryLoad(); } private void grid_main_MouseLeave(object sender, MouseEventArgs e) { if (storyboard_imgs.GetCurrentState() == ClockState.Stopped)//如果是停止的状态，则直接返回，不再起作用 { return; } if (storyboard_imgs.GetIsPaused() == true)//如果是暂停状态的话，则开始 { storyboard_imgs.Begin(); } } private void grid_main_MouseMove(object sender, MouseEventArgs e) { if (storyboard_imgs.GetIsPaused() == false) { storyboard_imgs.Pause(); } } } }