protected override List <String> DiscoverImageUrls(String search)
{
List <String> urls = new List <String>();
try
{
if (search == "")
{
StatusManager.Instance.StatusMessage("Please enter some text and try again.");
return(urls);
}
FlickrResponse response = PerformSearch(search);
while (urls.Count < this.totalDesiredImages)
{
// First, look for obvious error conditions, or exhausted results
if ((response == null) || (response.Photos == null))
{
// The Urls collection could be populated, so only
// present the error if it's not.
if (urls.Count == 0)
{
StatusManager.Instance.StatusMessage("No subjects found.");
}
return(urls);
}
if (response.Photos.PhotoCollection.Count > 10)
{
urls.Add(response.Photos.PhotoCollection[rand.Next(response.Photos.PhotoCollection.Count - 1)].MediumUrl);
}
if (response.Photos.TotalPages > 1)
{
if (rand.Next(0, 3) == 1)
{
long nextPage = (response.Photos.PageNumber + 1) % response.Photos.TotalPages;
response = PerformSearch(search, (int)nextPage);
}
}
else
{
// We didn't get that many results, so try reducing
// the search criteria
search = pruneSearch(search);
// Search again
response = PerformSearch(search);
}
}
}
catch (Exception)
{
}
return(urls);
}
private static FlickrResponse Deserialize(string responseString)
{
XmlSerializer serializer = _responseSerializer;
try
{
// Deserialise the web response into the Flickr response object
System.IO.StringReader responseReader = new System.IO.StringReader(responseString);
FlickrResponse response = (FlickrResponse)serializer.Deserialize(responseReader);
responseReader.Close();
return(response);
}
catch (InvalidOperationException ex)
{
// Serialization error occurred!
throw new Exception("FlickR: Invalid response received (" + ex.Message + ")");
}
}
