private CascadedWMSLayer getLayerInfomation(XElement layer, Dictionary <XElement, BBox> layer_bbox_map, HierachicalWMSLayers wms)
{
CascadedWMSLayer layerObject = new CascadedWMSLayer();
string name = null;
string title = null;
XElement nameElement = layer.Element(XName.Get("Name"));
//XElement LatLonBoundingBoxElement = layer.Element(XName.Get("LatLonBoundingBox"));
XElement Extent = layer.Element(XName.Get("Extent"));
IEnumerable <XElement> cascadedLayers = layer.Elements(XName.Get("Layer"));
//get BBOX information
BBox bbox = getBBoxInformation(layer);
if (bbox != null)
{
layerObject.latLonBBox = bbox;
layer_bbox_map.Add(layer, bbox);
}
//if current layer don't contain LatLonBoundingBox and Parent Layer is not exist or do not contain LatLonBoundingBox either, current layer is not accessible
else
{
XElement parent = layer.Parent;
while (parent.Name.Equals(XName.Get("Layer")))
{
if (layer_bbox_map.ContainsKey(layer.Parent))
{
bbox = BBox.CreateBBox(layer_bbox_map[layer.Parent]);
layerObject.latLonBBox = bbox;
layer_bbox_map.Add(layer, bbox);
break;
}
else
{
parent = parent.Parent;
}
}
}
//if there is not Layer name or LatLonBoundingBox element exist, the layer is not accessible
if (nameElement != null && layerObject.latLonBBox != null)
{
layerObject.canGetMap = true;
wms.allGetMapEnabledLayers_Number++;
}
else
{
layerObject.canGetMap = false;
}
if (nameElement == null)
{
layerObject.name = string_unknown;
}
else
{
name = nameElement.Value;
if (name != null && !(name.Trim().Equals("")))
{
layerObject.name = name;
}
}
XElement titleElement = layer.Element(XName.Get("Title"));
if (titleElement != null)
{
title = titleElement.Value;
if (title != null && !(title.Trim().Equals("")))
{
layerObject.title = title;
}
else
{
layerObject.title = string_unknown;
}
}
//we want to show title, which provide us more inforamtion than layer name, but when there is not layer title, we still show layer name as title
//if (layerObject.title == null && layerObject.name != null)
// layerObject.title = layerObject.name;
//add time extent
if (Extent != null && Extent.Attribute(XName.Get("name")).Value.Equals("time"))
{
layerObject.extent_time_default = Extent.Attribute(XName.Get("default")).Value;
layerObject.extent_time = Extent.Value;
layerObject.timeEnabled = true;
}
else
{
layerObject.timeEnabled = false;
}
//get the legend for the layer
XElement style = layer.Element(XName.Get("Style"));
if (style != null)
{
XElement legendURL = style.Element(XName.Get("LegendURL"));
if (legendURL != null)
{
XElement OnlineResource = legendURL.Element(XName.Get("OnlineResource"));
if (OnlineResource != null)
{
XAttribute url = OnlineResource.Attribute(XName.Get("href", "http://www.w3.org/1999/xlink"));
if (url != null)
{
layerObject.legendURL = url.Value;
}
}
}
}
//add children layers
if (cascadedLayers != null)
{
layerObject.Children = new System.Collections.ObjectModel.ObservableCollection <CascadedWMSLayer>();
foreach (XElement childLayer in cascadedLayers)
{
layerObject.Children.Add(getLayerInfomation(childLayer, layer_bbox_map, wms));
}
}
//get queryable information
XAttribute queryable = layer.Attribute(XName.Get("queryable"));
if (queryable != null && queryable.Value.Equals("1"))
{
layerObject.queryable = true;
}
else
{
layerObject.queryable = false;
}
return(layerObject);
}
public HierachicalWMSLayers getHierachicalLayersOfWMS(string urlstring)
{
HierachicalWMSLayers wms_layers = new HierachicalWMSLayers();
wms_layers.layersList = new List <CascadedWMSLayer>();
wms_layers.WMSURL = urlstring;
if (!urlstring.ToLower().Contains("service="))
{
if (urlstring.Contains("?"))
{
if (urlstring.EndsWith("&"))
{
urlstring += "SERVICE=WMS&REQUEST=GetCapabilities&VERSION=1.1.1";
}
else
{
urlstring += "&SERVICE=WMS&REQUEST=GetCapabilities&VERSION=1.1.1";
}
}
else
{
urlstring += "?SERVICE=WMS&REQUEST=GetCapabilities&VERSION=1.1.1";
}
}
XDocument doc = null;
try
{
string response = BaseHttpFunctions.HttpGet(urlstring);
doc = XDocument.Parse(response);
}
catch (Exception e)
{
e.GetType();
return(null);
}
if (doc != null)
{
XElement rootElement = doc.Root;
IEnumerable <XElement> Services = rootElement.Descendants(XName.Get("Service"));
if (Services != null)
{
foreach (XElement Service in Services)
{
string name = null;
string title = null;
XElement nameElement = Service.Element(XName.Get("Name"));
if (nameElement != null)
{
name = nameElement.Value;
if (name != null && !(name.Trim().Equals("")))
{
wms_layers.serviceName = name;
}
}
XElement titleElement = Service.Element(XName.Get("Title"));
if (titleElement != null)
{
title = titleElement.Value;
if (title != null && !(title.Trim().Equals("")))
{
wms_layers.serviceTitle = title;
}
}
}
}
Dictionary <XElement, BBox> layer_bbox_map = new Dictionary <XElement, BBox>();
XElement Capability = rootElement.Element(XName.Get("Capability"));
XElement firstLevel_Layer = Capability.Element(XName.Get("Layer"));
if (firstLevel_Layer != null)
{
IEnumerable <XElement> secondLevel_Layers = firstLevel_Layer.Elements(XName.Get("Layer"));
if (wms_layers.serviceName == null || wms_layers.serviceName.Trim().Equals(""))
{
XElement nameElement = firstLevel_Layer.Element(XName.Get("Name"));
if (nameElement == null || nameElement.Value.Trim().Equals(""))
{
wms_layers.serviceName = string_unknown;
}
else
{
wms_layers.serviceName = nameElement.Value;
}
}
if (wms_layers.serviceTitle == null || wms_layers.serviceTitle.Trim().Equals(""))
{
XElement titleElement = firstLevel_Layer.Element(XName.Get("Title"));
if (titleElement == null || titleElement.Value.Trim().Equals(""))
{
wms_layers.serviceTitle = string_unknown;
}
else
{
wms_layers.serviceTitle = titleElement.Value;
}
}
//get BBOX information
BBox bbox = getBBoxInformation(firstLevel_Layer);
if (bbox != null)
{
wms_layers.latLonBBox = bbox;
layer_bbox_map.Add(firstLevel_Layer, bbox);
}
wms_layers.subLayers_Number = secondLevel_Layers.Count();
foreach (XElement layer in secondLevel_Layers)
{
wms_layers.layersList.Add(getLayerInfomation(layer, layer_bbox_map, wms_layers));
}
}
}
return(wms_layers);
}