private void GetImage()
{
FileInfo fi = null;
if (LocalCachingSettings.UseLocalCaching)
{
string fn = LocalCachingSettings.LocalCachingFolder + @"\" + _dataset.DatasetName + @"\" + _level + @"\" + _row + @"\" + _col + ".jpg";
fi = new FileInfo(fn);
try
{
if (fi.Exists)
{
_bm = (System.Drawing.Bitmap)System.Drawing.Image.FromFile(fn);
return;
}
}
catch { }
}
try
{
string url = _dataset.TileUrl, quadkey = String.Empty;
if (url.Contains("\n"))
{
url = url.Replace("\r", String.Empty);
string[] urls = url.Split('\n');
url = urls[RasterTile.index % urls.Length];
RasterTile.index++;
if (RasterTile.index > 1000)
{
RasterTile.index = 0;
}
}
if (url.Contains("{3}"))
{
quadkey = _grid.Quadkey(_dataset.Extent, _level, _row, _col, _resolution);
}
url = String.Format(url, _col, _row, _level, quadkey);
using (MemoryStream ms = WebFunctions.DownloadStream(url))
{
_bm = (System.Drawing.Bitmap)System.Drawing.Image.FromStream(ms);
if (fi != null)
{
fi.Refresh();
if (!fi.Exists)
{
if (!fi.Directory.Exists)
{
fi.Directory.Create();
}
ms.Position = 0;
StreamWriter sw = new StreamWriter(fi.FullName);
ms.WriteTo(sw.BaseStream);
sw.Flush();
sw.Close();
}
}
}
}
catch { }
}