public Uri GetImageAddress(Wms wms)
{
// This object is readonly.
// WMS is readonly.
Debug.Assert(wms != null, "Every layer must have a parent layer!");
if (layers.Length > 0 && (crsId >= 0 && crsId < wms.CRSCount))
{
// Coordinates of requested map, left ...
var left = viewport.LeftCorner.ToString(CultureInfo.InvariantCulture);
// ... bottom ...
var bottom = viewport.BottomCorner.ToString(CultureInfo.InvariantCulture);
// ... right ...
var right = viewport.RightCorner.ToString(CultureInfo.InvariantCulture);
var top = viewport.TopCorner.ToString(CultureInfo.InvariantCulture); // ... and top
var isReversed = wms.IsCrsReversed;
var minx = isReversed ? bottom : left;
var miny = isReversed ? left : bottom;
var maxx = isReversed ? top : right;
var maxy = isReversed ? right : top;
var address = string.Format(CultureInfo.InvariantCulture, IMAGE_ADDRESS_TEMPLATE,
wms.ServiceAddress, // Address of the service
wms.Version, // Version of the service
layers, // Ordered list of layers (the first is the top-most)
wms.CRSVariableName, // Variable name for CRS
wms.GetCRSName(crsId), // CRS of requested map
minx, miny, maxx, maxy,
viewport.Width, // Width of image in pixels
viewport.Height, // Height of image in pixels
wms.GetImageFormat(format), // Format of the map image
isTransparent.ToString(), // String representation of transparency
// Transparent color in hexadecimal: red ...
bgColor.R.ToString("X2", CultureInfo.InvariantCulture),
bgColor.G.ToString("X2", CultureInfo.InvariantCulture), // ... green ...
bgColor.B.ToString("X2", CultureInfo.InvariantCulture)); // ... and blue
try
{
var uri = new Uri(address);
return(uri);
}
catch (UriFormatException)
{
Debug.Fail("The address template is incorrect!");
return(null);
}
}
return(null);
}
