/// <summary>
/// Exports a map to a byte array
/// </summary>
/// <param name="mapView">the map view containing the content</param>
/// <param name="sz">the size of the output image</param>
/// <param name="useScaling">true, if the contend should be scaled to fit the image size:
/// false, if the map scale shouldn't be changed.</param>
/// <returns>The (jpg) image as byte array</returns>
public byte[] ExportMap(MapView mapView, Size sz, bool useScaling)
{
Transform oldTransform = null;
if (useScaling)
{
// Set the transform object for scaling.
double scale = Math.Min(sz.Width / mapView.ActualWidth, sz.Height / mapView.ActualHeight);
oldTransform = mapView.LayoutTransform;
mapView.LayoutTransform = new ScaleTransform(scale, scale);
}
// Set the size.
var oldSize = new Size(mapView.ActualWidth, mapView.ActualHeight);
mapView.Measure(sz);
mapView.Arrange(new Rect(new Point(0, 0), sz));
// Print.
mapView.Printing = true;
mapView.UpdateLayout();
var renderTargetBitmap = new RenderTargetBitmap((int)sz.Width, (int)sz.Height, 96d, 96d, PixelFormats.Default);
renderTargetBitmap.Render(mapView);
mapView.Printing = false;
// Reset the old values.
if (useScaling)
{
mapView.LayoutTransform = oldTransform;
}
mapView.Measure(oldSize);
mapView.Arrange(new Rect(new Point(0, 0), oldSize));
// encode image
var jpegBitmapEncoder = new JpegBitmapEncoder();
jpegBitmapEncoder.Frames.Add(BitmapFrame.Create(renderTargetBitmap));
var ms = new MemoryStream();
jpegBitmapEncoder.Save(ms);
ms.Close();
return(ms.ToArray());
}
/// <summary>
/// Default print method of the map control,
/// Exports a map to a byte array
/// </summary>
/// <param name="mapView">the map view containing the content</param>
/// <param name="useScaling">true, if the contend should be scaled to fit the image size:
/// false, if the map scale shouldn't be changed.</param>
/// <param name="description"></param>
public void PrintMap(MapView mapView, bool useScaling, string description)
{
var printDialog = new PrintDialog();
if (printDialog.ShowDialog() == false)
{
return;
}
// Initialize variables.
var printCapabilities = printDialog.PrintQueue.GetPrintCapabilities(printDialog.PrintTicket);
Transform oldTransform = null;
if (useScaling)
{
// Set the transform object for scaling.
double scale = Math.Min(printCapabilities.PageImageableArea.ExtentWidth / mapView.ActualWidth,
printCapabilities.PageImageableArea.ExtentHeight / mapView.ActualHeight);
oldTransform = mapView.LayoutTransform;
mapView.LayoutTransform = new ScaleTransform(scale, scale);
}
// Set the size.
var oldSize = new Size(mapView.ActualWidth, mapView.ActualHeight);
var size = new Size(printCapabilities.PageImageableArea.ExtentWidth, printCapabilities.PageImageableArea.ExtentHeight);
mapView.Measure(size);
mapView.Arrange(new Rect(new Point(printCapabilities.PageImageableArea.OriginWidth, printCapabilities.PageImageableArea.OriginHeight), size));
// Print.
mapView.Printing = true;
mapView.UpdateLayout();
printDialog.PrintVisual(mapView, description);
mapView.Printing = false;
// Reset the old values.
if (useScaling)
{
mapView.LayoutTransform = oldTransform;
}
mapView.Measure(oldSize);
mapView.Arrange(new Rect(new Point(0, 0), oldSize));
}
