/// <summary>
/// The add cache item.
/// </summary>
/// <param name="url">The url.</param>
/// <param name="imageCacheItem">The image cache item.</param>
internal static void AddCacheItem(string url, ImageCacheItem imageCacheItem)
{
lock (ImageCacheLock)
{
imageCacheDictionary.Add(url, imageCacheItem);
}
}
/// <summary>
/// The get image.
/// </summary>
/// <param name="image">The image.</param>
/// <returns>The System.Windows.Media.Imaging.BitmapImage.</returns>
public static BitmapImage GetImage(BitmapImage image)
{
var url = image.UriSource.ToString();
if (Environment.OSVersion.Platform == PlatformID.Win32NT)
{
image.UriSource = new Uri(url);
return(image);
}
if (imageCacheDictionary == null)
{
lock (ImageCacheLock)
{
if (imageCacheDictionary == null)
{
LoadCachedImageInfo();
}
}
}
ImageCacheItem cacheItem;
if (imageCacheDictionary != null && imageCacheDictionary.TryGetValue(url, out cacheItem))
{
if (DateTime.Compare(DateTime.Now, cacheItem.Expiration) >= 0)
{
/* Item has expired. */
ImageDownloader.DownloadImage(url, image, cacheItem);
}
else
{
string imageFileName = cacheItem.LocalFilename;
var storageFile = IsolatedStorageFile.GetUserStoreForApplication();
var imageFile = storageFile.OpenFile(imageFileName, FileMode.Open);
image.SetSource(imageFile);
}
}
else
{
var item = new ImageCacheItem();
ImageDownloader.DownloadImage(url, image, item);
}
return(image);
}
/// <summary>
/// The download image.
/// </summary>
/// <param name="imageUrl">The image url.</param>
/// <param name="image">The image.</param>
/// <param name="imageCacheItem">The image cache item.</param>
public static void DownloadImage(string imageUrl, BitmapImage image, ImageCacheItem imageCacheItem)
{
var filename = CreateUniqueFilename(imageUrl);
imageCacheItem.LocalFilename = filename;
var asyncDataTransfer = new AsyncDataTransfer
{
ImageCacheItem = imageCacheItem,
Image = image
};
var httpWebRequest = (HttpWebRequest)WebRequest.Create(imageUrl);
if (imageCacheItem.ImageId != null)
{
httpWebRequest.Headers["If-None-Match"] = imageCacheItem.ImageId;
}
asyncDataTransfer.Request = httpWebRequest;
httpWebRequest.BeginGetResponse(RequestCallback, asyncDataTransfer);
}
/// <summary>
/// The download image.
/// </summary>
/// <param name="imageUrl">The image url.</param>
/// <param name="image">The image.</param>
/// <param name="imageCacheItem">The image cache item.</param>
public static void DownloadImage(string imageUrl, BitmapImage image, ImageCacheItem imageCacheItem)
{
var filename = CreateUniqueFilename(imageUrl);
imageCacheItem.LocalFilename = filename;
var asyncDataTransfer = new AsyncDataTransfer
{
ImageCacheItem = imageCacheItem,
Image = image
};
var httpWebRequest = (HttpWebRequest)WebRequest.Create(imageUrl);
if (imageCacheItem.ImageId != null)
{
httpWebRequest.Headers["If-None-Match"] = imageCacheItem.ImageId;
}
asyncDataTransfer.Request = httpWebRequest;
httpWebRequest.BeginGetResponse(RequestCallback, asyncDataTransfer);
}
/// <summary>
/// The get image.
/// </summary>
/// <param name="image">The image.</param>
/// <returns>The System.Windows.Media.Imaging.BitmapImage.</returns>
public static BitmapImage GetImage(BitmapImage image)
{
var url = image.UriSource.ToString();
if (Environment.OSVersion.Platform == PlatformID.Win32NT)
{
image.UriSource = new Uri(url);
return image;
}
if (imageCacheDictionary == null)
{
lock (ImageCacheLock)
{
if (imageCacheDictionary == null)
{
LoadCachedImageInfo();
}
}
}
ImageCacheItem cacheItem;
if (imageCacheDictionary != null && imageCacheDictionary.TryGetValue(url, out cacheItem))
{
if (DateTime.Compare(DateTime.Now, cacheItem.Expiration) >= 0)
{
/* Item has expired. */
ImageDownloader.DownloadImage(url, image, cacheItem);
}
else
{
string imageFileName = cacheItem.LocalFilename;
var storageFile = IsolatedStorageFile.GetUserStoreForApplication();
var imageFile = storageFile.OpenFile(imageFileName, FileMode.Open);
image.SetSource(imageFile);
}
}
else
{
var item = new ImageCacheItem();
ImageDownloader.DownloadImage(url, image, item);
}
return image;
}
/// <summary>
/// The add cache item.
/// </summary>
/// <param name="url">The url.</param>
/// <param name="imageCacheItem">The image cache item.</param>
internal static void AddCacheItem(string url, ImageCacheItem imageCacheItem)
{
lock (ImageCacheLock)
{
imageCacheDictionary.Add(url, imageCacheItem);
}
}
