as there baidu image has protect refer from other site to use.
need download i use request header add referer:http://www.baidu.com
<Window x:Class=”WpfApplication1.WindMsg”
xmlns=”http://schemas.microsoft.com/winfx/2006/xaml/presentation” xmlns:x=”http://schemas.microsoft.com/winfx/2006/xaml” Title=”WindMsg” Height=”300″ Width=”300″ Closing=”Window_Closing” Loaded=”Window_Loaded”> <Grid> <Image Name=”img” Stretch=”Uniform” Source=”{Binding BitmapImg}”/> <Button Content=”{Binding Text}” Height=”65″ HorizontalAlignment=”Left” Margin=”58,48,0,0″ Name=”button1″ VerticalAlignment=”Top” Width=”160″ Click=”button1_Click” /> </Grid></Window> public WindMsg() { InitializeComponent(); d = new ImageData() { Url = “http://img0.imgtn.bdimg.com/it/u=3028557787,2951839071&fm=15&gp=0.jpg”, Text = “test button text” }; this.DataContext = d; } ImageData d; public class ImageData { public string Url { get; set; } public string Text { get; set; } public ImageSource BitmapImg { get { return GetImageData(); } set { } } BitmapImage GetImageData() { using (WebClient wc = new WebClient()) { wc.Headers.Add(“Referer”, “http://www.baidu.com”); Stream stream = wc.OpenRead(Url); BitmapImage b = new BitmapImage(); b.BeginInit(); b.StreamSource = stream; b.EndInit(); return b; } } }
缓冲图片，延迟加载
// Create sourceBitmapImage myBitmapImage = new BitmapImage();// BitmapImage.UriSource must be in a BeginInit/EndInit blockmyBitmapImage.BeginInit();myBitmapImage.UriSource = new Uri(str, UriKind.Absolute);// To save significant application memory, set the DecodePixelWidth or // DecodePixelHeight of the BitmapImage value of the image source to the desired // height or width of the rendered image. If you don’t do this, the application will // cache the image as though it were rendered as its normal size rather then just // the size that is displayed.// Note: In order to preserve aspect ratio, set DecodePixelWidth// or DecodePixelHeight but not both.myBitmapImage.DecodePixelWidth = 2048;myBitmapImage.EndInit();//set image source
