private static void ReadGMLWithoutSpecifyingGMLOptions() { //ExStart: ReadGMLWithoutSpecifyingGMLOptions // Case 1: we try to load schema from Internet. // first, we create an instance of GmlOptions class. GmlOptions options = new GmlOptions { // In order to read GML layers features description, Aspose.GIS reads XML schema attached to it. // Usually, it is specified in GML files root tag as 'schemaLocation' attribute. If it is not, you need to specify GML schema location // youself. In this examples we don't specify it (keep it null), so Aspose.GIS will try to read schema location from XML file. SchemaLocation = null, // 'schemaLocation' may contain references to schemas located on the Internet. In this case, you need to set this property to 'true' in // order to allow Aspose.GIS to load schemas from internet. // Basically, if you don't mind Aspose.GIS using internet, you can always keep this true. LoadSchemasFromInternet = true, }; // then, we pass it to 'VectorLayer.Open' Console.WriteLine("from internet loading..."); using (VectorLayer layer = VectorLayer.Open(dataDir + "file.gml", Drivers.Gml, options)) { foreach (Feature feature in layer) { Console.WriteLine(feature.GetValue <string>("attribute")); } } // Case 2: we try to restore the attributes schema by data in file. Console.WriteLine(""); Console.WriteLine("restoration by file data..."); using (VectorLayer layer = VectorLayer.Open(dataDir + "file.gml", Drivers.Gml, new GmlOptions() { RestoreSchema = true })) { foreach (Feature feature in layer) { Console.WriteLine(feature.GetValue <string>("attribute")); } } //ExEnd: ReadGMLWithoutSpecifyingGMLOptions }
private static void ReadGMLBySpecifyingGMLOptions() { //ExStart: ReadGMLBySpecifyingGMLOptions GmlOptions options = new GmlOptions { // In this example we specify custom schemaLocation, since there is no 'schemaLocation' in GML file. SchemaLocation = "http://www.aspose.com schema.xsd", LoadSchemasFromInternet = false, }; Console.WriteLine(""); Console.WriteLine("custom schema location..."); using (VectorLayer layer = VectorLayer.Open(dataDir + "file_without_schema_location.gml", Drivers.Gml, options)) { foreach (Feature feature in layer) { Console.WriteLine(feature.GetValue <string>("attribute")); } } //ExEnd: ReadGMLBySpecifyingGMLOptions }