C# + WPF自制B站客户端

已经开源，地址：Github地址
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最近无聊尝试调用Web API做个B站的客户端程序练练手，经过两天的摸索有了一些成果。主要的思路有如下几个：

使用B站的Web扫描二维码接口，获取登录Cookie，再通过Cookie获取需要的信息
使用ZXing开源库生成二维码图片
使用WPF写程序的界面
通过异步加载，实现列表的流畅显示
ListBox使用动画过渡实现更好的滑动效果

以后有时间的话，完整的分析一下项目，这里放出实现的一些界面和Web API调用的方法

ListBox 动画滑动效果

 public class AnimationScrollViewer : ScrollViewer{        //记录上一次的滚动位置private double LastLocation = 0;        //重写鼠标滚动事件protected override void OnMouseWheel(MouseWheelEventArgs e){double WheelChange = e.Delta;            //可以更改一次滚动的距离倍数 (WheelChange可能为正负数!)double newOffset = LastLocation - (WheelChange * 2);            //Animation并不会改变真正的VerticalOffset(只是它的依赖属性) 所以将VOffset设置到上一次的滚动位置 (相当于衔接上一个动画)            ScrollToVerticalOffset(LastLocation);            //碰到底部和顶部时的处理if (newOffset < 0)newOffset = 0; if (newOffset > ScrollableHeight)newOffset = ScrollableHeight;AnimateScroll(newOffset);LastLocation = newOffset;            //告诉ScrollViewer我们已经完成了滚动e.Handled = true;}private void AnimateScroll(double ToValue){            //为了避免重复，先结束掉上一个动画BeginAnimation(ScrollViewerBehavior.VerticalOffsetProperty, null);DoubleAnimation Animation = new DoubleAnimation();Animation.EasingFunction = new CubicEase() { EasingMode = EasingMode.EaseOut };Animation.From = VerticalOffset;Animation.To = ToValue;            //动画速度Animation.Duration = TimeSpan.FromMilliseconds(400);            //考虑到性能，可以降低动画帧数            //Timeline.SetDesiredFrameRate(Animation, 40);BeginAnimation(ScrollViewerBehavior.VerticalOffsetProperty, Animation);}}public static class ScrollViewerBehavior{public static readonly DependencyProperty VerticalOffsetProperty = DependencyProperty.RegisterAttached("VerticalOffset", typeof(double), typeof(ScrollViewerBehavior), new UIPropertyMetadata(0.0, OnVerticalOffsetChanged));public static void SetVerticalOffset(FrameworkElement target, double value) => target.SetValue(VerticalOffsetProperty, value);public static double GetVerticalOffset(FrameworkElement target) => (double)target.GetValue(VerticalOffsetProperty);private static void OnVerticalOffsetChanged(DependencyObject target, DependencyPropertyChangedEventArgs e) => (target as ScrollViewer)?.ScrollToVerticalOffset((double)e.NewValue);}

ListBox 动画进入效果

   public class FadeAnimateItemsBehavior : Behavior<ItemsControl>{public DoubleAnimation Animation { get; set; }public ThicknessAnimation TaAnimation { get; set; }public TimeSpan Tick { get; set; }protected override void OnAttached(){base.OnAttached();AssociatedObject.Loaded += new System.Windows.RoutedEventHandler(AssociatedObject_Loaded);}void AssociatedObject_Loaded(object sender, System.Windows.RoutedEventArgs e){IEnumerable<ListBoxItem> items;if (AssociatedObject.ItemsSource == null){items = AssociatedObject.Items.Cast<ListBoxItem>();}else{var itemsSource = AssociatedObject.ItemsSource;if (itemsSource is INotifyCollectionChanged){var collection = itemsSource as INotifyCollectionChanged;collection.CollectionChanged += (s, cce) =>{if (cce.Action == NotifyCollectionChangedAction.Add){var itemContainer = AssociatedObject.ItemContainerGenerator.ContainerFromItem(cce.NewItems[0]) as ContentPresenter;if (itemContainer != null){itemContainer.BeginAnimation(ContentPresenter.OpacityProperty, Animation);itemContainer.BeginAnimation(ContentPresenter.MarginProperty, TaAnimation);}}};}ListBoxItem[] itemsSub = new ListBoxItem[AssociatedObject.Items.Count];for (int i = 0; i < itemsSub.Length; i++){itemsSub[i] = AssociatedObject.ItemContainerGenerator.ContainerFromIndex(i) as ListBoxItem;}items = itemsSub;}foreach (var item in items){if (item!=null)item.Opacity = 0;}var enumerator = items.GetEnumerator();if (enumerator.MoveNext()){DispatcherTimer timer = new DispatcherTimer() { Interval = Tick };timer.Tick += (s, timerE) =>{var item = enumerator.Current;if (item != null){item.BeginAnimation(ListBoxItem.OpacityProperty, Animation);item.BeginAnimation(ListBoxItem.MarginProperty, TaAnimation);}if (!enumerator.MoveNext()){timer.Stop();}};timer.Start();}}}

WebAPI调用：

public class WebApiRequest{/// <summary>/// 调用webapi通用方法(带Cookie)/// </summary>/// <param name="url"></param>/// <returns></returns>public async static Task<string> WebApiGetAsync(string url){return await Task.Run(() =>{string content = null;using (HttpClient httpclient = new HttpClient()){HttpRequestMessage msg = new HttpRequestMessage();msg.Method = HttpMethod.Get;msg.RequestUri = new Uri(url);if (SoftwareCache.CookieString != null){msg.Headers.Add("Cookie", SoftwareCache.CookieString);//cookie:SESSDATA=***}var result = httpclient.SendAsync(msg).Result;content = result.Content.ReadAsStringAsync().Result;}return content;});}/// <summary>/// 调用webapi通用方法(带参数)/// </summary>/// <param name="url"></param>/// <returns></returns>public async static Task<string> WebApiGetAsync(string url, Dictionary<string, string> para){return await Task.Run(() =>{string content = null;StringBuilder parastr = new StringBuilder("?");foreach (var item in para){parastr.Append(item.Key);parastr.Append("=");parastr.Append(item.Value);parastr.Append("&");}string paraResult = parastr.ToString().TrimEnd('&');using (HttpClient httpclient = new HttpClient()){HttpRequestMessage msg = new HttpRequestMessage();msg.Method = HttpMethod.Get;msg.RequestUri = new Uri(url + paraResult);if (SoftwareCache.CookieString != null){msg.Headers.Add("Cookie", SoftwareCache.CookieString);//cookie:SESSDATA=***}var result = httpclient.SendAsync(msg).Result;content = result.Content.ReadAsStringAsync().Result;}return content;});}public async static Task<string> PostHttpAsync(string url, string body, string contentType){return await Task.Run(() =>{HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(url);httpWebRequest.ContentType = contentType;httpWebRequest.Method = "POST";httpWebRequest.Timeout = 20000;byte[] btBodys = Encoding.UTF8.GetBytes(body);httpWebRequest.ContentLength = btBodys.Length;httpWebRequest.GetRequestStream().Write(btBodys, 0, btBodys.Length);HttpWebResponse httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();StreamReader streamReader = new StreamReader(httpWebResponse.GetResponseStream());string responseContent = streamReader.ReadToEnd();httpWebResponse.Close();streamReader.Close();httpWebRequest.Abort();httpWebResponse.Close();return responseContent;});}}

生成二维码

 public class QRCode{public static ImageSource CreateQRCode(string content, int width, int height){EncodingOptions options;//包含一些编码、大小等的设置BarcodeWriter write = null;//用来生成二维码，对应的BarcodeReader用来解码options = new QrCodeEncodingOptions{DisableECI = true,CharacterSet = "UTF-8",Width = width,Height = height,Margin = 0};write = new BarcodeWriter();write.Format = BarcodeFormat.QR_CODE;write.Options = options;IntPtr ip = write.Write(content).GetHbitmap();BitmapSource bitmapSource = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(ip, IntPtr.Zero, Int32Rect.Empty,System.Windows.Media.Imaging.BitmapSizeOptions.FromEmptyOptions());DeleteObject(ip);return bitmapSource;}// 注销对象方法API[DllImport("gdi32")]static extern int DeleteObject(IntPtr o);}

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