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我試圖通過使用WP7來實現新聞（饋送者）的應用程序我試過這個解決方案，但它不適用於我，這裏是我的代碼：本地保存圖像並顯示windows phone 7
namespace PhoneApp1
{
public partial class MainPage : PhoneApplicationPage
{
public MainPage()
{
InitializeComponent();}
private void Go_Click(object sender, RoutedEventArgs e)
{
WebClient _client = new WebClient();
_client.DownloadStringCompleted += Feed;
Location.Text = "http://www.aufaitmaroc.com/feeds/ma-vie.xml";
_client.DownloadStringAsync(new Uri((Location.Text)));
InitializeComponent();
}
private void Feed(object Sender, DownloadStringCompletedEventArgs e)
{
XElement _xml;
try
{
if (!e.Cancelled)
{
_xml = XElement.Parse(e.Result);
List<FeedItem> l = new List<FeedItem>();
foreach (XElement value in _xml.Elements("channel").Elements("item"))
{
FeedItem _item = new FeedItem();
_item.Title = value.Element("title").Value;
_item.enclosure = value.Element("enclosure").Attribute("url").Value;
_item.Description = Regex.Replace(value.Element("description").Value,
@"<(.|\n)*?>", String.Empty);
_item.Link = value.Element("link").Value;
_item.Guid = value.Element("guid").Value;
_item.Published = DateTime.Parse(value.Element("pubDate").Value);
l.Add(_item);
HttpWebRequest reqest1 = (HttpWebRequest)WebRequest.Create(_item.enclosure);
reqest1.BeginGetResponse(DownloadImageCallback, reqest1);
Thread.Sleep(1000);
WebClient client = new WebClient();
client.OpenReadCompleted += new OpenReadCompletedEventHandler(client_OpenReadCompleted);
client.OpenReadAsync(new Uri(_item.enclosure), client);
}
listBox.ItemsSource = l;
}
}
catch
{
}
}
IsolatedStorageFile MyStore = IsolatedStorageFile.GetUserStoreForApplication();
void client_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)
{
var resInfo = new StreamResourceInfo(e.Result, null);
var reader = new StreamReader(resInfo.Stream);
byte[] contents;
using (BinaryReader bReader = new BinaryReader(reader.BaseStream))
{
contents = bReader.ReadBytes((int)reader.BaseStream.Length);
}
IsolatedStorageFileStream stream = MyStore.CreateFile("10.jpg");
stream.Write(contents, 0, contents.Length);
stream.Close();
}
void DownloadImageCallback(IAsyncResult result)
{
HttpWebRequest req1 = (HttpWebRequest)result.AsyncState;
HttpWebResponse responce = (HttpWebResponse)req1.EndGetResponse(result);
Stream s = responce.GetResponseStream();
Deployment.Current.Dispatcher.BeginInvoke(() =>
{
string directory = "Imagestest";
if (!MyStore.DirectoryExists(directory))
{
MyStore.CreateDirectory(directory);
IsolatedStorageFileStream stream = MyStore.CreateFile("10.jpg");
using (IsolatedStorageFile myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication())
{
using (var isoFileStream = myIsolatedStorage.CreateFile(directory + "//ANALYSE_10052013095620.jpg"))
{
var bitimage = new BitmapImage();
var wb = new WriteableBitmap(bitimage);
var width = wb.PixelWidth;
var height = wb.PixelHeight;
// bitimage.SetSource = isoFileStream;
image1.Source = bitimage;
System.Windows.Media.Imaging.Extensions.SaveJpeg(wb, isoFileStream, width, height, 0, 100);
}
}
}
else
{
using (IsolatedStorageFile myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication())
{
if (myIsolatedStorage.FileExists(directory + "//ANALYSE_10052013095620.jpg"))
{
myIsolatedStorage.DeleteFile(directory + "//ANALYSE_10052013095620.jpg");
}
using (var isoFileStream = myIsolatedStorage.CreateFile(directory + "//ANALYSE_10052013095620.jpg"))
{
var bitimage = new BitmapImage();
var wb = new WriteableBitmap(bitimage);
var width = wb.PixelWidth;
var height = wb.PixelHeight;
System.Windows.Media.Imaging.Extensions.SaveJpeg(wb, isoFileStream, width, height, 0, 100);
}
}
}
});
}
private void listBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
FeedItem currentFeedItem = (FeedItem)listBox.SelectedItem;
PhoneApplicationService.Current.State["FeedItem"] = currentFeedItem;
}
當我運行這個項目時，什麼都沒有發生，它不會創建任何文件夾，當我停止互聯網時，圖像不再顯示。
謝謝dud，我已經試過這個，但是它臨時存儲圖像，我想在我離線時加入我的應用程序。how can I do that？ – Zizou