Web客户端负载JPG GIF和图像来(WebClient Load JPG & GIF to Im

在我的XAML，我有：

<Image Height="150" HorizontalAlignment="Left" Margin="0,4,0,0" Name="imgLogo" Stretch="Fill" VerticalAlignment="Top" Width="417" />
<Image Height="343" HorizontalAlignment="Left" Margin="0,155,0,0" Name="imgPhoto" Stretch="Fill" VerticalAlignment="Top" Width="417" />

在后面的C＃代码，我有：

WebClient wcForLogo = new WebClient();
wcForLogo.DownloadStringCompleted += new DownloadStringCompletedEventHandler(wcForLogo_DownloadStringCompleted);
wcForLogo.DownloadStringAsync(new Uri("http://mySite/logo.gif"));

WebClient wcForPhoto = new WebClient();
wcForPhoto.DownloadStringCompleted += new DownloadStringCompletedEventHandler(wcForPhoto_DownloadStringCompleted);
wcForPhoto.DownloadStringAsync(new Uri("http://mySite/photo.jpg"));

但现在我不知道如何捕捉到的图像和我建立了XAML控件张贴。

2个问题：

1. 有没有办法给e.Result直接复制到图片控件，或者我应该缓存图像，并使用缓存为源，或者我应该将图像保存到独立存储，然后使用为源，然后删除当我用它做的形象呢？ 无论情况下，请你告诉我怎么用代码？
2. 为GIF的和JPG的处理有所不同？ 如果是这样，你能告诉我2种不同的方式？

Answer 1:

如果你只是想显示的图片，你不必使用Web客户端。 您可以将图像源中直接设置URI和控制会照顾下载的：

imgLogo.Source = new BitmapImage(new Uri("images/yourPicture.png", UriKind.Relative));

需要注意的是GIF不受Image控件的支持。 ：您仍然可以通过使用从ImageTools库中的转换器显示它们在使用Silverlight WP7一个应用程序显示GIF

Answer 2:

using System.Net;
using System.IO;
        private void Form1_Load(object sender, EventArgs e)
        {
            WebClient webclient = new WebClient();
            webclient.DownloadDataAsync(new Uri("http://mySite/logo.gif"));
            webclient.DownloadDataCompleted += callback;

        }
        void callback(object sender,DownloadDataCompletedEventArgs e)
        {
            var ms = new MemoryStream(e.Result);
            pictureBox1.Image = Image.FromStream(ms);
        }

Answer 3:

如果你想在这样的独立存储的使用，以节省

            WebClient m_webClient = new WebClient();

            Uri m_uri = new Uri("http://URL");

            m_webClient.OpenReadCompleted += new OpenReadCompletedEventHandler(webClient_OpenReadCompleted);

            m_webClient.OpenReadAsync(m_uri);




        }



    void webClient_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)
    {
        int count;

        Stream stream = e.Result;

        byte[] buffer = new byte[1024];


        using (IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication())
        {




            using (System.IO.IsolatedStorage.IsolatedStorageFileStream isfs = new IsolatedStorageFileStream("IMAGES.jpg", FileMode.Create, isf))
            {
                count = 0;

                while (0 < (count = stream.Read(buffer, 0, buffer.Length)))
                {
                    isfs.Write(buffer, 0, count);
                }

                stream.Close();
                isfs.Close();
            }
        }

为了让图像格式isostore：

字节[]数据;

        using (IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication())
        {

            using (IsolatedStorageFileStream isfs = isf.OpenFile(uri, FileMode.Open, FileAccess.Read))
            {
                data = new byte[isfs.Length];
                isfs.Read(data, 0, data.Length);
                isfs.Close();
            }

        }


        MemoryStream ms = new MemoryStream(data);

        BitmapImage bi = new BitmapImage();

        bi.SetSource(ms);

If you give the image name as image then set the source as bi:

        image.source = bi;

如果您想直接添加

  WebClient client = new WebClient();
  Stream stream = client.OpenRead(imageUrl);
  Bitmap bitmap = new Bitmap(stream);
  image.source = bitmap;

Answer 4:

比方说，你的图像控制被称为MyImage ，你可以做到这一点从一个URL加载图像：

MyImage.Source = new System.Windows.Media.Imaging.BitmapImage(new Uri("http://mySite/photo.jpg"));

不需要做所有的管道只是下载图像，框架已经这样做是为您服务！

文章来源: WebClient Load JPG & GIF to Image