/// <summary>
///
/// </summary>
/// <param name="map"></param>
/// <param name="context"></param>
private static void GetFeatureInfo(SharpMap.Map map, System.Web.HttpContext context)
{
//Check for required parameters
if (context.Request.Params["LAYERS"] == null)
{ WmsException.ThrowWmsException("Required parameter LAYERS not specified"); return; }
if (context.Request.Params["QUERY_LAYERS"] == null)
{ WmsException.ThrowWmsException("Required parameter QUERY_LAYERS not specified"); return; }
if (context.Request.Params["STYLES"] == null)
{ WmsException.ThrowWmsException("Required parameter STYLES not specified"); return; }
if (context.Request.Params["SRS"] == null)
{ WmsException.ThrowWmsException("Required parameter CRS not specified"); return; }
/*else if (context.Request.Params["SRS"] != "EPSG:" + map.Layers[0].SRID.ToString())
{ WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidCRS, "CRS not supported"); return; }*/
if (context.Request.Params["BBOX"] == null)
{ WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue, "Required parameter BBOX not specified"); return; }
if (context.Request.Params["WIDTH"] == null)
{ WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue, "Required parameter WIDTH not specified"); return; }
if (context.Request.Params["HEIGHT"] == null)
{ WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidDimensionValue, "Required parameter HEIGHT not specified"); return; }
if (context.Request.Params["INFO_FORMAT"] == null)
{ WmsException.ThrowWmsException("Required parameter INFO_FORMAT not specified"); return; }
if (context.Request.Params["FEATURE_COUNT"] == null)
{ WmsException.ThrowWmsException("Required parameter FEATURE_COUNT not specified"); return; }
if (context.Request.Params["X"] == null)
{ WmsException.ThrowWmsException("Required parameter X not specified"); return; }
if (context.Request.Params["Y"] == null)
{ WmsException.ThrowWmsException("Required parameter Y not specified"); return; }
//Set layers on/off
if (context.Request.Params["LAYERS"] != "") //If LAYERS is empty, use all layers
{
string[] layers = context.Request.Params["LAYERS"].Split(new char[] { ',' });
foreach (SharpMap.Layers.ILayer layer in map.Layers)
layer.Enabled = false;
bool layerNotFound = true;
string layerNotFoundName = "";
foreach (string layer in layers)
{
SharpMap.Layers.ILayer lay = map.Layers.Find(delegate(SharpMap.Layers.ILayer findlay) { return findlay.LayerName == layer; });
if (lay == null)
{
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.LayerNotDefined, "Unknown layer '" + layer + "'");
return;
}
else
{
if (lay is SharpMap.Layers.VectorLayer)
{
lay.Enabled = true;
layerNotFound = false;
}
else
{
lay.Enabled = false;
layerNotFoundName = layer;
}
}
}
if (layerNotFound)
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.LayerNotQueryable, "No se puede consultar la capa '" + layerNotFoundName + "'");
}
else
{
foreach (SharpMap.Layers.ILayer lay in map.Layers)
{
if (lay is SharpMap.Layers.VectorLayer)
lay.Enabled = true;
else
lay.Enabled = false;
}
}
SharpMap.Geometries.BoundingBox bbox = ParseBBOX(context.Request.Params["bbox"]);
if (bbox == null)
{
WmsException.ThrowWmsException("Invalid parameter BBOX");
return;
}
int w = 0;
int h = 0;
if (!int.TryParse(context.Request.Params["WIDTH"], out w))
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidFormat, "Invalid WIDTH");
if (!int.TryParse(context.Request.Params["HEIGHT"], out h))
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidFormat, "Invalid HEIGHT");
map.Size = new System.Drawing.Size(w, h);
map.ZoomToBox(bbox);
float x = 0;
float y = 0;
if (!float.TryParse(context.Request.Params["X"], System.Globalization.NumberStyles.Float, SharpMap.Map.numberFormat_EnUS, out x))
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidPoint, "Invalid x coordinate");
if (!float.TryParse(context.Request.Params["Y"], System.Globalization.NumberStyles.Float, SharpMap.Map.numberFormat_EnUS, out y))
WmsException.ThrowWmsException(WmsException.WmsExceptionCode.InvalidPoint, "Invalid y coordinate");
System.Drawing.PointF ptf = new System.Drawing.PointF(x, y);
SharpMap.Geometries.Point pt = map.ImageToWorld(ptf);
// Para cada layer activo realizo la consulta:
SharpMap.Data.FeatureDataRow fdrow = null;
foreach (SharpMap.Layers.ILayer layer in map.Layers)
{
if (layer.Enabled)
{
SharpMap.Layers.VectorLayer vlayer = layer as SharpMap.Layers.VectorLayer;
vlayer.DataSource.Open();
double distance = 0.0;
fdrow = vlayer.FindGeoNearPoint(pt, 0.1, ref distance);
vlayer.DataSource.Close();
}
}
string response = "";
if (OnProcessWMSGetFeatureInfoResponse != null)
{
response = OnProcessWMSGetFeatureInfoResponse(fdrow, context.Request.Params["INFO_FORMAT"], context.Request.Params["LAYERS"]);
}
context.Response.Clear();
context.Response.ContentType = context.Request.Params["INFO_FORMAT"];
context.Response.Write(response);
context.Response.End();
}