private ImageSource GenerateMapImage()
{
Collection <Layer> layersToDraw = new Collection <Layer>();
// Create the background world maps using vector tiles stored locally in our MBTiles file and also set the styling though a json file
ThinkGeoMBTilesLayer mbTilesLayer = new ThinkGeoMBTilesLayer(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "Data/Mbtiles/Frisco.mbtiles"), new Uri(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "Data/Json/thinkgeo-world-streets-light.json"), UriKind.Relative));
mbTilesLayer.Open();
layersToDraw.Add(mbTilesLayer);
// Create the new layer and set the projection as the data is in srid 2276 and our background is srid 3857 (spherical mercator).
ShapeFileFeatureLayer zoningLayer = new ShapeFileFeatureLayer(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "Data/Shapefile/Zoning.shp"));
zoningLayer.FeatureSource.ProjectionConverter = new ProjectionConverter(2276, 3857);
zoningLayer.Open();
// Create an Area style on zoom level 1 and then apply it to all zoom levels up to 20.
zoningLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = new AreaStyle(new GeoPen(GeoBrushes.Blue));
zoningLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
layersToDraw.Add(zoningLayer);
// Create a GeoCanvas to do the drawing
GeoCanvas canvas = GeoCanvas.CreateDefaultGeoCanvas();
// Create a GeoImage as the image to draw on
GeoImage geoImage = new GeoImage(800, 600);
// Start the drawing by specifying the image, extent and map units
canvas.BeginDrawing(geoImage, MapUtil.GetDrawingExtent(zoningLayer.GetBoundingBox(), 800, 600), GeographyUnit.Meter);
// This collection is used during drawing to pass labels in between layers so we can track collisions
Collection <SimpleCandidate> labels = new Collection <SimpleCandidate>();
// Loop through all the layers and draw them to the GeoCanvas
// The flush is to compact styles that use different drawing levels
foreach (var layer in layersToDraw)
{
layer.Draw(canvas, labels);
canvas.Flush();
}
// End drawing, we can now use the GeoImage
canvas.EndDrawing();
// Create a memory stream and save the GeoImage as a standard PNG formatted image
MemoryStream imageStream = new MemoryStream();
geoImage.Save(imageStream, GeoImageFormat.Png);
// Reset the image stream back to the beginning
imageStream.Position = 0;
return(ImageSource.FromStream(() =>
{
return imageStream;
}));
}
private void btnToBitmap_Click(object sender, RoutedEventArgs e)
{
PrinterInteractiveOverlay printerInteractiveOverlay = (PrinterInteractiveOverlay)Map1.InteractiveOverlays["PrintPreviewOverlay"];
PagePrinterLayer pagePrinterLayer = printerInteractiveOverlay.PrinterLayers["PageLayer"] as PagePrinterLayer;
// Create a bitmap that is the size of the pages bounding box. The page by default is in points unit
// system which is very similar to pixels so that ampping is nice.
GeoImage bitmap = null;
try
{
bitmap = new GeoImage((int)pagePrinterLayer.GetBoundingBox().Width, (int)pagePrinterLayer.GetBoundingBox().Height);
// Create a GeoCanvas and start the drawing
GeoCanvas gdiPlusGeoCanvas = GeoCanvas.CreateDefaultGeoCanvas();
gdiPlusGeoCanvas.BeginDrawing(bitmap, pagePrinterLayer.GetBoundingBox(), Map1.MapUnit);
// Loop through all of the PrintingLayer in the PrinterInteractiveOverlay and print all of the
// except for the PagePrinterLayer
Collection <SimpleCandidate> labelsInAllLayers = new Collection <SimpleCandidate>();
foreach (PrinterLayer printerLayer in printerInteractiveOverlay.PrinterLayers)
{
printerLayer.IsDrawing = true;
if (!(printerLayer is PagePrinterLayer))
{
printerLayer.Draw(gdiPlusGeoCanvas, labelsInAllLayers);
}
printerLayer.IsDrawing = false;
}
// End the drawing
gdiPlusGeoCanvas.EndDrawing();
//Save the resulting bitmap to a file and open the file to show the user
string filename = "PrintingResults.bmp";
bitmap.Save(filename);
Process.Start("explorer.exe", filename);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message + " " + ex.StackTrace, "Exception");
}
finally
{
if (bitmap != null)
{
bitmap.Dispose();
}
}
}
