public override void ProcessRequest()
{
int assetId = GetIdFromFilename();
Asset asset = Asset.Get(assetId);
string filename;
if (asset.IsNull)
{
filename = "~/Images/Spacer.gif";
}
else if (!EntitySecurityManager.CanUserViewAssetThumbnail(SessionInfo.Current.User, asset))
{
filename = "~/Images/Spacer.gif";
}
else
{
// First check if we need to display a fixed thumbnail
filename = GetFixedThumbnailUrl(asset);
// No fixed thumbnail, so get real thumbnail
if (filename == string.Empty)
{
if (asset.IsProcessed)
{
// Asset is processed, so show either the thumbnail or unavailable image
AssetThumbnailInfo info = new AssetThumbnailInfo(asset);
filename = (info.FileExists) ? info.FilePath : "~/Images/Asset/Thumbnails/Unavailable.gif";
}
else
{
// Otherwise, asset is not processed, so show the processing image
filename = "~/Images/Asset/Thumbnails/Processing.gif";
}
}
}
// Fix relative mappings
if (filename.StartsWith("~/"))
{
filename = Context.Server.MapPath(filename);
}
// Send the image
WriteFileToResponseStream(filename);
}
protected void DeleteThumbnail_Click(object sender, EventArgs e)
{
AssetThumbnailInfo info = new AssetThumbnailInfo(Asset);
if (info.FileExists)
{
try
{
File.Delete(info.FilePath);
AssetThumbnail1.Initialise(Asset);
FeedbackLabel1.SetSuccessMessage("Thumbnail deleted successfully");
}
catch (Exception ex)
{
ExceptionHandler.HandleException(ex, "Error deleting thumbnail");
FeedbackLabel1.SetErrorMessage("Error deleting thumbnail: " + ex.Message);
}
}
else
{
FeedbackLabel1.SetErrorMessage("Thumbnail file does not exist");
}
}
