private void Fetch(TileInfo tileInfo)
{
try
{
var data = _tileSource.Provider.GetTile(tileInfo);
_fileCache.Add(tileInfo.Index, data);
_fileCache.AddWorldFile(tileInfo, _tileSource.Schema.GetTileHeight("0"), _tileSource.Schema.GetTileHeight("0"),
_tileSource.Schema.Format);
}
catch (Exception)
{
}
}
private void FetchAsync(TileInfo tileInfo)
{
ThreadPool.QueueUserWorkItem(
source =>
{
Exception error = null;
Tile <T> tile = null;
try
{
if (_tileSource != null)
{
byte[] data = _tileSource.Provider.GetTile(tileInfo);
_fileCache.Add(tileInfo.Index, data);
_fileCache.AddWorldFile(tileInfo, _tileSource.Schema.GetTileHeight("0"), _tileSource.Schema.GetTileHeight("0"),
_tileSource.Schema.Format);
tile = new Tile <T> {
Data = data, Info = tileInfo
};
}
}
catch (Exception ex) //This may seem a bit weird. We catch the exception to pass it as an argument. This is because we are on a worker thread here, we cannot just let it fall through.
{
error = ex;
}
lock (_tilesInProgress)
{
if (_tilesInProgress.Contains(tileInfo.Index))
{
_tilesInProgress.Remove(tileInfo.Index);
}
}
_waitHandle.Set();
if (DataChanged != null && !_isAborted)
{
DataChanged(this, new DataChangedEventArgs <T>(error, false, tile));
}
});
}