解析http://219.142.81.86/igserver/ogc/kvp/TAS10R52000J49/WMTSServer服务的元数据

// 测试httpWebRequest读取 wmts元数据

string address = "http://219.142.81.86/igserver/ogc/kvp/TAS10R52000J49/WMTSServer";

var request = (HttpWebRequest)WebRequest.Create(address);

var response = (HttpWebResponse)request.GetResponse();

var stream = response.GetResponseStream();

if (stream == null) return;

var xmlReader = new XmlTextReader(stream);

var xmlDocument = new XmlDocument();

xmlDocument.Load(xmlReader);

string namespace_uri = xmlDocument.DocumentElement.NamespaceURI;

var nsmgr = new XmlNamespaceManager(xmlDocument.NameTable);

nsmgr.AddNamespace("wmts", namespace_uri);

XmlNode node = xmlDocument.SelectSingleNode("//wmts:Layer", nsmgr);

if (node == null)    return;        

string LowerCorner, UpperCorner;

// 得到layer节点的所有子节点

XmlNodeList xnl = node.ChildNodes;

double west = 0;

double east = 0;

double south = 0;

double north = 0;

foreach (XmlNode xn1 in xnl)

 {

　　if (xn1.Name == "ows:BoundingBox" || xn1.Name == "ows:WGS84BoundingBox")

　　{

            XmlElement xe = (XmlElement)xn1;

            //得到crs属性

            string crs = xe.GetAttribute("crs").ToString();

            // 得到BoundBox节点的所有子节点                   

            XmlNodeList xn10 = xn1.ChildNodes;

            LowerCorner = xn10.Item(0).InnerText;

            UpperCorner = xn10.Item(1).InnerText;

            string[] cc = LowerCorner.Split(' ');

            west = Convert.ToDouble(cc[0]);

            south = Convert.ToDouble(cc[1]);

            string[] uu = UpperCorner.Split(' ');

            east = Convert.ToDouble(uu[0]);

            north = Convert.ToDouble(uu[1]);

　　}                

       // 将节点转换为元素，便于得到节点的属性值

       //XmlElement xe = (XmlElement)xn1;

       // 得到Type和ISBN两个属性的属性值

       //string type = xe.GetAttribute("ows:Type").ToString();   //<book Type="必修课" ISBN="7-111-19149-2">

}

            XmlNodeList nodes = xmlDocument.SelectNodes("//wmts:TileMatrixSet", nsmgr);

            if (nodes.Count <= 0) return;

            Dictionary<int, _tileMatrix> tileMatrixSet = new Dictionary<int,_tileMatrix>();  

            int minLevel = 9999;

            int maxLevel = -9999;

            

            foreach (XmlNode xn1 in nodes)

            {

                if (xn1.ParentNode == null || xn1.ParentNode.Name != "Contents")

                    continue;

                

                XmlNodeList xn11 = xn1.ChildNodes;

                foreach (XmlNode xn110 in xn11)

                {

                    if (xn110.Name == "TileMatrix")

                    {

                        XmlNodeList xn10 = xn110.ChildNodes;

                        string strlevel = xn10.Item(0).InnerText;

                        string[] temp = strlevel.Split(':');

                        int cn = temp.Count();

                        int level = 0;

                        if (cn == 1)

                            level = Convert.ToInt32(temp[0]);

                        else

                            level = Convert.ToInt32(temp[cn-1]);

                        

                        double ScaleDenominator = Convert.ToDouble(xn10.Item(1).InnerText);

                        string[] TopLeftCorner = xn10.Item(2).InnerText.Split(' ');

                        double top = Convert.ToDouble(TopLeftCorner[0]);

                        double left = Convert.ToDouble(TopLeftCorner[1]);

                        int TileWidth = Convert.ToInt32(xn10.Item(3).InnerText);

                        int TileHeight = Convert.ToInt32(xn10.Item(4).InnerText);

                        int cols = Convert.ToInt32(xn10.Item(5).InnerText);

                        int rows = Convert.ToInt32(xn10.Item(6).InnerText);

                        _tileMatrix ts = new _tileMatrix();

                        ts.level = level;

                        ts.cornerTop = top;

                        ts.cornerLeft = level;

                        ts.tileWidth = TileWidth;

                        ts.tileHeight = TileHeight;

                        ts.tileCols = cols;

                        ts.tileRows = rows;

                        tileMatrixSet.Add(level, ts);

                        minLevel = Math.Min(minLevel, level);

                        maxLevel = Math.Max(maxLevel, level);

                    }

                }                 

            }

          

            xmlReader.Close();