Hi all,
From DrawFeaturesBasedOnValues sample I learned how to do this in ShapFileFeatureLayer. But it seems don't work in InMemoryFeatureLayer. Please help me with this problem.
Best regards,
Feng
How to draw features based on values in InMemoryFeatureLayer?
Feng,
Here is the code what you want below:
winformsMap1.MapUnit = GeographyUnit.DecimalDegree;
winformsMap1.CurrentExtent = new RectangleShape(0, 100, 100, 0);
winformsMap1.BackgroundOverlay.BackgroundBrush = new GeoSolidBrush(GeoColor.StandardColors.White);
InMemoryFeatureLayer inMemoryLayer = new InMemoryFeatureLayer();
inMemoryLayer.FeatureSource.Open();
inMemoryLayer.Columns.Add(new FeatureSourceColumn("Name"));
inMemoryLayer.Close();
Dictionary<string, string> columnValuesForPolygon = new Dictionary<string, string>();
columnValuesForPolygon.Add("Name", "Polygon");
Dictionary<string, string> columnValuesForMultiPoint = new Dictionary<string, string>();
columnValuesForMultiPoint.Add("Name", "MultiPoint");
Dictionary<string, string> columnValuesForLine = new Dictionary<string, string>();
columnValuesForLine.Add("Name", "Line");
Dictionary<string, string> columnValuesForRectangle = new Dictionary<string, string>();
columnValuesForRectangle.Add("Name", "Rectangle");
ValueStyle valueStyle = new ValueStyle();
valueStyle.ColumnName = "Name";
valueStyle.ValueItems.Add(new ValueItem("Polygon", AreaStyles.Country1));
valueStyle.ValueItems.Add(new ValueItem("MultiPoint", PointStyles.Capital3));
valueStyle.ValueItems.Add(new ValueItem("Line", LineStyles.Highway1));
valueStyle.ValueItems.Add(new ValueItem("Rectangle", AreaStyles.Country2));
inMemoryLayer.ZoomLevelSet.ZoomLevel01.CustomStyles.Add(valueStyle);
inMemoryLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
inMemoryLayer.InternalFeatures.Add("Polygon", new Feature(BaseShape.CreateShapeFromWellKnownData("POLYGON((10 60,40 70,30 85, 10 60))"), columnValuesForPolygon));
inMemoryLayer.InternalFeatures.Add("Multipoint", new Feature(BaseShape.CreateShapeFromWellKnownData("MULTIPOINT(10 20, 30 20,40 20, 10 30, 30 30, 40 30)"), columnValuesForMultiPoint));
inMemoryLayer.InternalFeatures.Add("Line", new Feature(BaseShape.CreateShapeFromWellKnownData("LINESTRING(60 60, 70 70,75 60, 80 70, 85 60,95 80)"), columnValuesForLine));
inMemoryLayer.InternalFeatures.Add("Rectangle", new Feature(new RectangleShape(65, 30, 95, 15), columnValuesForRectangle));
LayerOverlay staticOverlay = new LayerOverlay();
staticOverlay.Layers.Add("InMemoryFeatureLayer", inMemoryLayer);
winformsMap1.Overlays.Add("InMemoryOverlay", staticOverlay);
winformsMap1.Refresh();
Thanks,
Scott,