/// <summary>
/// Makes a request to download the image from the server and raises the <see cref="cachedFileCallback"/> when it's down.<br/>
/// </summary>
/// <param name="imageUri">The online image uri</param>
/// <param name="filePath">the path on disk to download the file to</param>
/// <param name="async">is to download the file sync or async (true-async)</param>
/// <param name="cachedFileCallback">This callback will be called with local file path. If something went wrong in the download it will return null.</param>
public void DownloadImage(Uri imageUri, string filePath, bool async, DownloadFileAsyncCallback cachedFileCallback)
{
ArgChecker.AssertArgNotNull(imageUri, "imageUri");
ArgChecker.AssertArgNotNull(cachedFileCallback, "cachedFileCallback");
// to handle if the file is already been downloaded
bool download = true;
lock (_imageDownloadCallbacks)
{
if (_imageDownloadCallbacks.ContainsKey(filePath))
{
download = false;
_imageDownloadCallbacks[filePath].Add(cachedFileCallback);
}
else
{
_imageDownloadCallbacks[filePath] = new List<DownloadFileAsyncCallback> { cachedFileCallback };
}
}
if (download)
{
var tempPath = Path.GetTempFileName();
if (async)
ThreadPool.QueueUserWorkItem(DownloadImageFromUrlAsync, new DownloadData(imageUri, tempPath, filePath));
else
DownloadImageFromUrl(imageUri, tempPath, filePath);
}
}
/// <summary>
/// Makes a request to download the image from the server and raises the <see cref="cachedFileCallback"/> when it's down.<br/>
/// </summary>
/// <param name="imageUri">The online image uri</param>
/// <param name="filePath">the path on disk to download the file to</param>
/// <param name="async">is to download the file sync or async (true-async)</param>
/// <param name="cachedFileCallback">This callback will be called with local file path. If something went wrong in the download it will return null.</param>
public void DownloadImage(Uri imageUri, string filePath, bool async,
DownloadFileAsyncCallback cachedFileCallback)
{
ArgChecker.AssertArgNotNull(imageUri, "imageUri");
ArgChecker.AssertArgNotNull(cachedFileCallback, "cachedFileCallback");
// to handle if the file is already been downloaded
bool download = true;
lock (_imageDownloadCallbacks)
{
if (_imageDownloadCallbacks.ContainsKey(filePath))
{
download = false;
_imageDownloadCallbacks[filePath].Add(cachedFileCallback);
}
else
{
_imageDownloadCallbacks[filePath] = new List <DownloadFileAsyncCallback> {
cachedFileCallback
};
}
}
if (download)
{
var tempPath = Path.GetTempFileName();
if (async)
{
ThreadPool.QueueUserWorkItem(DownloadImageFromUrlAsync,
new DownloadData(imageUri, tempPath, filePath));
}
else
{
DownloadImageFromUrl(imageUri, tempPath, filePath);
}
}
}
