public override Task <IFeatureCursor> GetFeatures(IQueryFilter filter)
{
string queryUrl = $"{ _dataaset.ServiceUrl() }/{ this.ID }/query?f=json";
string geometryType = String.Empty, geometry = String.Empty;
int outSrefId = (filter.FeatureSpatialReference != null) ? filter.FeatureSpatialReference.EpsgCode : 0,
inSrefId = 0;
// Bitte nicht ändern -> Verursacht Pagination Error vom AGS und Performance Problem wenn daten im SQL Spatial liegen
string featureLimit = String.Empty; //(filter.FeatureLimit <= 0 ? "" : filter.FeatureLimit.ToString());
string separatedSubFieldsString = String.IsNullOrWhiteSpace(filter.SubFields) ? "*" : filter.SubFields.Replace(" ", ",");
if (filter is SpatialFilter)
{
var sFilter = (SpatialFilter)filter;
inSrefId = sFilter.FilterSpatialReference != null ? sFilter.FilterSpatialReference.EpsgCode : 0;
if (sFilter.Geometry is IPoint)
{
geometry = RestHelper.ConvertGeometryToJson(((Point)sFilter.Geometry), inSrefId);
geometryType = RestHelper.GetGeometryTypeString(((Point)sFilter.Geometry));
}
else if (sFilter.Geometry is IMultiPoint)
{
geometry = RestHelper.ConvertGeometryToJson(((MultiPoint)sFilter.Geometry), inSrefId);
geometryType = RestHelper.GetGeometryTypeString(((MultiPoint)sFilter.Geometry));
} // TODO - if needed
else if (sFilter.Geometry is IPolyline)
{
geometry = RestHelper.ConvertGeometryToJson(((Polyline)sFilter.Geometry), inSrefId);
geometryType = RestHelper.GetGeometryTypeString(((Polyline)sFilter.Geometry));
}
else if (sFilter.Geometry is IPolygon)
{
geometry = RestHelper.ConvertGeometryToJson(((Polygon)sFilter.Geometry), inSrefId);
geometryType = RestHelper.GetGeometryTypeString(((Polygon)sFilter.Geometry));
}
else if (sFilter.Geometry is IEnvelope)
{
geometry = RestHelper.ConvertGeometryToJson(((Envelope)sFilter.Geometry), inSrefId);
geometryType = RestHelper.GetGeometryTypeString(((Envelope)sFilter.Geometry));
}
else
{
}
}
string where = filter.WhereClause;
// is always set in featurecursor
//string orderBy = this.IDFieldName;
var postBodyData = new StringBuilder();
postBodyData.Append($"&geometry={ geometry }&geometryType={ geometryType }&spatialRel=esriSpatialRelIntersects&relationParam=&objectIds=");
postBodyData.Append($"&time=&maxAllowableOffset=&outFields={ separatedSubFieldsString }&resultRecordCount={ featureLimit }&f=pjson");
postBodyData.Append($"&returnCountOnly=false&returnIdsOnly=false&returnGeometry={ true }");
return(Task.FromResult <IFeatureCursor>(
new GeoServicesFeatureCursor(_dataaset, this, queryUrl, postBodyData.ToString(), where)));
}
async public Task <bool> MapRequest(gView.Framework.Carto.IDisplay display)
{
if (_dataset == null)
{
return(false);
}
List <IWebServiceTheme> themes = Themes;
if (themes == null)
{
return(false);
}
#region Check for visible Layers
bool visFound = this.Themes.Where(l => l.Visible).Count() > 0;
if (!visFound)
{
if (_image != null)
{
_image.Dispose();
_image = null;
}
return(true);
}
#endregion Check for visible Layers
var serviceUrl = _dataset.ServiceUrl();
//IServiceRequestContext context = display.Map as IServiceRequestContext;
var jsonExportMap = new JsonExportMap();
if (display?.Envelope != null)
{
var env = display.Envelope;
jsonExportMap.BBox = $"{env.minx.ToDoubleString()},{env.miny.ToDoubleString()},{env.maxx.ToDoubleString()},{env.maxy.ToDoubleString()}";
}
var sRef = display.SpatialReference ?? this.SpatialReference;
if (sRef != null)
{
jsonExportMap.BBoxSRef = sRef.Name.ToLower().Replace("epsg:", "");
}
jsonExportMap.Size = $"{display.iWidth},{display.iHeight}";
var layerIds = this.Themes
.Where(l => l.Visible && (l.Class is IWebFeatureClass || l.Class is IWebRasterClass))
.Select(l =>
{
if (l.Class is IWebFeatureClass)
{
return(((IWebFeatureClass)l.Class).ID);
}
if (l.Class is IWebRasterClass)
{
return(((IWebRasterClass)l.Class).ID);
}
return(String.Empty);
});
jsonExportMap.Layers = $"show:{String.Join(",", layerIds)}";
var urlParameters = SerializeToUrlParameters(jsonExportMap);
var response = await _dataset.TryPostAsync <JsonExportResponse>(
serviceUrl
.UrlAppendPath("export")
.UrlAppendParameters("f=json")
.UrlAppendParameters(urlParameters));
bool hasImage = false;
if (!String.IsNullOrWhiteSpace(response.Href))
{
var bm = WebFunctions.DownloadImage(response.Href);
if (bm != null)
{
hasImage = true;
_image = new GeorefBitmap(bm);
if (response.Extent != null)
{
_image.Envelope = new Envelope(response.Extent.Xmin, response.Extent.Ymin, response.Extent.Xmax, response.Extent.Ymax);
}
_image.SpatialReference = sRef;
}
}
if (!hasImage)
{
if (_image != null)
{
_image.Dispose();
_image = null;
}
return(false);
}
return(true);
return(true);
}