Pushpin symbol from in memory Bitmap

How do I set a custom pushpin symbol from a in memory Bitmap image?
I know that I can load an image like this:


Symbol muSymbol = m_MapApp.ActiveMap.Symbols.Add("c:\myImage.bmp");
pin.Symbol = muSymbol.ID;

But is there a way to set the symbol from an bitmap image in the compiled resources? or is there a way to add a bitmap directly like:


Bitmap myBitmap = new Bitmap("c:\myImage.bmp");
Symbol muSymbol = m_MapApp.ActiveMap.Symbols.Add(myBitmap);
pin.Symbol = muSymbol.ID;

You may be able to use a memory stream to do this.

Do you have any example code when a memory stream is used?

Thanks!

Hi,

I think it has to be a disk file. Eventually you can speed up using a ram disk.

So there is no way to compile the image into the projects resources and then fetch it from there into my mappoint object???

Do you have any example code when a memory stream is used?

Unfortunately I do not, I have not done any mapplications that have needed it. Memory Streams are an I/O Class, and can be used for the moving of images to/from databases, and I use them for websites. You may want to look at it over at MSDN (http://msdn2.microsoft.com/en-us/library/system.io.memorystream.aspx)

Bitmap myBitmap = new Bitmap("c:\myImage.bmp");
MemoryStream myStream = new MemoryStream();
myBitmap.Save(myStream, ImageFormat.bmp);
is all good code. now you just need to get that into your symbol variable

Hi,

Maybe create a mapped file ? This is a file resident in memory. Normally windows API has same functions for all types of IO, so possible it works with mappoint as well. See http://msdn2.microsoft.com/en-us/library/aa366551(VS.85).aspx for some example.

On the other hand I think it is much more simple to keep all bitmaps in resource of your application, save them to a real file, import in mappoint, and "I think" you can delete them afterwards (not sure).

Did this just yesterday.
My problem was that my bitmap was a 32 bit image (Bitmap bm) and the pushpins have to be 24 bit or smaller. I am tracking trailers, hence the notation of TrailerName. You use your own names, of course.

So, that is the code that I have here ....

Bitmapbitdump = newBitmap(bm.Width, bm.Height, PixelFormat.Format24bppRgb);
for (intx = 0; x < bm.Width; x++)
{
for (inty = 0; y < bm.Height; y++)
{
Colorc = bm.GetPixel(x, y);
bitdump.SetPixel(x, y, Color.FromArgb(c.R, c.G, c.B));
}
}
Stringpath = objMap.Parent.DefaultFilePath;
bitdump.Save(path + "/" + TrailerName + ".bmp", ImageFormat.Bmp);
MapPoint.Symbolsym = objMap.Symbols.Add(TrailerName + ".bmp");
MapPoint.Locationloc = objMap.GetLocation(Latitude, Longitude, 0);
MapPoint.Pushpinpin = objMap.AddPushpin(loc, TrailerName);
pin.Symbol = sym.ID;

I create a new 24 bit bitmap and do the easy and long way to copy the bits from the source bitmap to my target. There may be a better way but I wanted to get the show going and didn't feel like reading and researching for something else.

Anyway, having built the new bitmap, I found that it had to be saved in the MapPoint folder structure. That is the need for the path variable.

Save the bitmap and re-read it into a symbol.

Assign the symbol to the pushpin

Dennis