wp7启动+幻灯片效果

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;

using Microsoft.Phone.Controls;

using System.ComponentModel;

using System.Windows.Media.Imaging;



namespace PictureSlide

{

    public partial class MainPage : PhoneApplicationPage

    {

        ImageFrameGroup FrameGroup;

        /// <summary>

        /// 当前项索引

        /// </summary>

        public int CurItemIndex { get; set; }

        private List<string> ItemData;

        /// <summary>

        /// 滑动模式

        /// </summary>

        private TScrollMode ScrollMode = TScrollMode.EBack;

        /// <summary>

        /// 切换页面移动触发距离

        /// </summary>

        private const double KMinMoveLen = 50;

        // 构造函数

        public MainPage()

        {

            InitializeComponent();

            // --- 视图数据绑定

            this.FrameGroup = new ImageFrameGroup();

            this.CanvasImageView.DataContext = this.FrameGroup;

            CurItemIndex = 0;

            ItemData = ImageData.GetImages();



            LoadCurImageFrame();

        }



        #region 载入三张图片

        private void LoadCurImageFrame()

        {

            //检查索引合法性，防止快速滑动索引出问题。

            CheckIndexValid();

            Canvas.SetLeft(CanvasImageView, -485);

            FrameGroup.MidFrame = LoadImage(ItemData[CurItemIndex]);

            if (DataModelNullOrEmpty(CurItemIndex - 1))

            {

                FrameGroup.LeftFrame = LoadImage(ItemData[CurItemIndex - 1]);

            }

            else

            {

                FrameGroup.LeftFrame = null;

            }

            if (DataModelNullOrEmpty(CurItemIndex + 1))

            {

                FrameGroup.RightFrame = LoadImage(ItemData[CurItemIndex + 1]);

            }

            else

            {

                FrameGroup.RightFrame = null;

            }

        }



        private ImageSource LoadImage(string ImagePath)

        {

            try

            {

                BitmapImage bitmap = new BitmapImage();

                bitmap.UriSource = new Uri(ImagePath, UriKind.Relative);

                return bitmap;

            }

            catch (Exception)

            {

                return null;

            }

        }

        #endregion



        #region 数据的合法性

        /// <summary>

        /// 数组数据的合法性

        /// </summary>

        /// <param name="index"></param>

        private bool DataModelNullOrEmpty(int index)

        {

            return index >= 0 && index < ItemData.Count;

        }

        #endregion





        #region 检查图片索引合法性

        private void CheckIndexValid()

        {

            if (CurItemIndex < 0)

            {

                CurItemIndex = 0;

            }

            if (CurItemIndex >= ItemData.Count)

            {

                CurItemIndex = ItemData.Count - 1;

            }

        }

        #endregion



        #region 拖动图片

        /// <summary>

        /// 

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void GestureListener_DragDelta(object sender, DragDeltaGestureEventArgs e)

        {

            if (CanvasImageView.Visibility == Visibility.Collapsed)

                return;

            double dLeft = Canvas.GetLeft(CanvasImageView);

            Canvas.SetLeft(CanvasImageView, dLeft + e.HorizontalChange);

        }

        #endregion



        #region 拖动结束

        /// <summary>

        /// 

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void GestureListener_DragCompleted(object sender, DragCompletedGestureEventArgs e)

        {

            if (CanvasImageView.Visibility == Visibility.Collapsed)

                return;

            double velocity = e.HorizontalChange;



            if (e.Direction != System.Windows.Controls.Orientation.Horizontal)

            {

                ScrollTo(TScrollMode.EBack, velocity);

            }

            else



                if (Math.Abs(velocity) < KMinMoveLen)

                {

                    // --- 回滚

                    ScrollTo(TScrollMode.EBack, velocity);

                }

                else

                    if (e.HorizontalChange > 0)

                    {

                        // --- 前一张

                        if (DataModelNullOrEmpty(CurItemIndex - 1))

                        {

                            ScrollTo(TScrollMode.EPreview, velocity);

                        }

                        else

                        {

                            ScrollTo(TScrollMode.EBack, velocity);

                        }

                    }

                    else

                    {

                        // --- 下一张

                        if (DataModelNullOrEmpty(CurItemIndex + 1))

                        {

                            ScrollTo(TScrollMode.ENext, velocity);

                        }

                        else

                        {

                            ScrollTo(TScrollMode.EBack, velocity);

                        }

                    }

        }

        #endregion



        #region MyRegion

        Storyboard storyBoardOperator;

        public void ScrollTo(TScrollMode scrollMode, double velocity)

        {

            ScrollMode = scrollMode;

            // --- 终点位置

            double endPos = 0;

            switch (scrollMode)

            {

                case TScrollMode.EBack:

                    endPos = -485;

                    break;

                case TScrollMode.ENext:

                    endPos = -970;

                    break;

                case TScrollMode.EPreview:

                    endPos = 0;

                    break;

            }



            double timeSpan = 0.3;

            // --- 启动滑动效果



            // --- 启动滑动效果

            if (storyBoardOperator == null)

            {

                storyBoardOperator = new Storyboard();

                storyBoardOperator.Completed += new EventHandler(Storhboard_Completed);

            }

            else

            {

                storyBoardOperator.Stop();

                storyBoardOperator.Children.Clear();

            }



            storyBoardOperator.Children.Add(CreateDoubleAnimation(CanvasImageView, timeSpan, endPos, new PropertyPath(Canvas.LeftProperty)));

            storyBoardOperator.Begin();

        }

        /// <summary>

        /// 动画完成

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void Storhboard_Completed(object sender, EventArgs e)

        {

            if (ScrollMode == TScrollMode.ENext && CurItemIndex < ItemData.Count - 1)

                CurItemIndex++;

            else if (ScrollMode == TScrollMode.EPreview && CurItemIndex > 0)

                CurItemIndex--;

            LoadCurImageFrame();

        }

        #endregion



        #region 开始拖动

        /// <summary>

        /// 

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void GestureListener_DragStarted(object sender, DragStartedGestureEventArgs e)

        {



        }

        #endregion



        #region MyRegion

        public DoubleAnimation CreateDoubleAnimation(DependencyObject Dependobj, double timespan, double To, PropertyPath property)

        {

            DoubleAnimation doubleAnimation = new DoubleAnimation();

            doubleAnimation.Duration = new Duration(TimeSpan.FromSeconds(timespan));

            Storyboard.SetTarget(doubleAnimation, Dependobj);

            Storyboard.SetTargetProperty(doubleAnimation, property);

            doubleAnimation.To = To;

            return doubleAnimation;

        }

        #endregion

    }

}

 

http://files.cnblogs.com/walleyekneel/WP7PictureSlide_ce130e98-d791-46e8-813d-865d7339aa6d.zip