private static async Task LoadCachedTileAsync(Tile tile, Uri uri, string cacheKey)
{
var cacheItem = await GetCacheAsync(cacheKey).ConfigureAwait(false);
var buffer = cacheItem?.Buffer;
if (cacheItem == null || cacheItem.Expiration < DateTime.UtcNow)
{
var response = await ImageLoader.GetHttpResponseAsync(uri).ConfigureAwait(false);
if (response != null) // download succeeded
{
buffer = response.Buffer; // may be null or empty when no tile available, but still be cached
await SetCacheAsync(cacheKey, buffer, GetExpiration(response.MaxAge)).ConfigureAwait(false);
}
}
if (buffer != null && buffer.Length > 0)
{
var image = await ImageLoader.LoadImageAsync(buffer).ConfigureAwait(false);
await tile.Image.Dispatcher.InvokeAsync(() => tile.SetImage(image));
}
}
private static async Task LoadCachedTile(Tile tile, Uri uri, string cacheKey)
{
var cacheItem = Cache.Get(cacheKey) as Tuple <byte[], DateTime>;
var buffer = cacheItem?.Item1;
if (cacheItem == null || cacheItem.Item2 < DateTime.UtcNow)
{
var response = await ImageLoader.GetHttpResponseAsync(uri).ConfigureAwait(false);
if (response != null) // download succeeded
{
buffer = response.Buffer; // may be null or empty when no tile available, but still be cached
cacheItem = Tuple.Create(buffer, GetExpiration(response.MaxAge));
Cache.Set(cacheKey, cacheItem, new CacheItemPolicy {
AbsoluteExpiration = cacheItem.Item2
});
}
}
//else System.Diagnostics.Debug.WriteLine($"Cached: {cacheKey}");
if (buffer != null && buffer.Length > 0)
{
var image = await ImageLoader.LoadImageAsync(buffer).ConfigureAwait(false);
await tile.Image.Dispatcher.InvokeAsync(() => tile.SetImage(image));
}
}
private static async Task LoadCachedTile(Tile tile, Uri uri, string cacheKey)
{
var cacheItem = await Cache.GetAsync(cacheKey).ConfigureAwait(false);
var buffer = cacheItem?.Item1;
if (cacheItem == null || cacheItem.Item2 < DateTime.UtcNow)
{
var response = await ImageLoader.GetHttpResponseAsync(uri).ConfigureAwait(false);
if (response != null) // download succeeded
{
buffer = response.Buffer; // may be null or empty when no tile available, but still be cached
await Cache.SetAsync(cacheKey, buffer, GetExpiration(response.MaxAge)).ConfigureAwait(false);
}
}
//else System.Diagnostics.Debug.WriteLine($"Cached: {cacheKey}");
if (buffer != null && buffer.Length > 0)
{
await SetTileImage(tile, () => ImageLoader.LoadImageAsync(buffer)).ConfigureAwait(false);
}
}