topic Re: Have individual cache tiles, how to load in map as CachedTileLayer in ArcGIS API for Silverlight Questions

Have individual cache tiles, how to load in map as CachedTileLayer

davidrenz — Thu, 24 Mar 2011 22:17:04 GMT

I am able to get each individual tile from a tile cache, with each request by intercepting the "TileLoading" event. That works fine.

But, how do i then stitch them all back together for the map?

I just found this documentation on doing what I am doing:
http://help.arcgis.com/en/webapi/silverlight/apiref/ESRI.ArcGIS.Client~ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer~GetTileUrl.html

but now don't know how to put everything back together so that i can load the map with my tiles.

this is how i am getting the tiles.
when i am watching fiddler, i see an initial connection to the map service, but then see no more communication.
is assigning the e.ImageSource all i really need to do?

        private void ArcGISTiledMapServiceLayer_TileLoading(object sender, ESRI.ArcGIS.Client.TiledLayer.TileLoadEventArgs e)
        {
            string sBaseLocation = @"D:\Cache\Test\_alllayers";

            ImageSourceConverter isc = new ImageSourceConverter();
            e.ImageSource = (ImageSource) isc.ConvertFromString(sBaseLocation + "\\L" + e.Level.ToString().PadLeft(2, '0')
                    + "\\R" + e.Row.ToString("x").PadLeft(8, '0') + "\\C"
                    + e.Column.ToString("x").PadLeft(8, '0') + ".png");

        }

any help would be greatly appreciated.

thanks
david

Re: Have individual cache tiles, how to load in map as CachedTileLayer

wangzhifang — Fri, 25 Mar 2011 01:00:20 GMT

I am able to get each individual tile from a tile cache, with each request by intercepting the "TileLoading" event. That works fine.

But, how do i then stitch them all back together for the map?

I just found this documentation on doing what I am doing:
http://help.arcgis.com/en/webapi/silverlight/apiref/ESRI.ArcGIS.Client~ESRI.ArcGIS.Client.ArcGISTiledMapServiceLayer~GetTileUrl.html

but now don't know how to put everything back together so that i can load the map with my tiles.

this is how i am getting the tiles.
when i am watching fiddler, i see an initial connection to the map service, but then see no more communication.
is assigning the e.ImageSource all i really need to do?

        private void ArcGISTiledMapServiceLayer_TileLoading(object sender, ESRI.ArcGIS.Client.TiledLayer.TileLoadEventArgs e)
        {
            string sBaseLocation = @"D:\Cache\Test\_alllayers";

            ImageSourceConverter isc = new ImageSourceConverter();
            e.ImageSource = (ImageSource) isc.ConvertFromString(sBaseLocation + "\\L" + e.Level.ToString().PadLeft(2, '0')
                    + "\\R" + e.Row.ToString("x").PadLeft(8, '0') + "\\C"
                    + e.Column.ToString("x").PadLeft(8, '0') + ".png");

        }

any help would be greatly appreciated.

thanks
david

You can inherit from TiledLayer or TiledMapServiceLayer, and override its
GetTileSource(protected override void GetTileSource(int level, int row, int col, Action<System.Windows.Media.ImageSource> onComplete)
method, return your image in onComplete action, that's all.

Re: Have individual cache tiles, how to load in map as CachedTileLayer

dotMorten_esri — Fri, 25 Mar 2011 18:53:02 GMT

If you listen to TileLoading, you can intercept the tilerequest before it's being requested from the server, check if you already have the tile locally, and set the ImageSource property on the eventargument.