# How to simply Draw and Select vertices? **URL:** \ **Category:** WinForms\ **Created:** [February 18, 2010, 2:35pm UTC](https://community.thinkgeo.com/t/how-to-simply-draw-and-select-vertices/1055 "2010-02-18T14:35:29Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Eric\_S](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/e/aca169/32.png) [@Eric\_S](https://community.thinkgeo.com/u/Eric_S)\ **Post date:** [February 18, 2010, 2:35pm UTC](https://community.thinkgeo.com/t/how-to-simply-draw-and-select-vertices/1055/1 "2010-02-18T14:35:29Z")
Can anyone point me to an approqach where I can simply draw vertices on a line and have the ability to select a vertex and return its position? I have been looking at some of the editInteractiveOverlay samples and maybe I am missing something, as I don't want to actually edit the vertices. Just draw and select. Any pointers are greatly apreciated.Thanks. Eric ---
**Author:** ![Val](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/v/e56c9b/32.png) [@Val](https://community.thinkgeo.com/u/Val)\ **Post date:** [February 18, 2010, 4:45pm UTC](https://community.thinkgeo.com/t/how-to-simply-draw-and-select-vertices/1055/2 "2010-02-18T16:45:41Z")
 One way to do that is to use an InMemoryFeatureLayer with two features. Because, if you are just selecting a vertex and displaying, you don't need an EditInterectiveOverlay. Of the two features, one for the line itself and another one for the vertex. In the code below, I use the MapClick event to select a vertex and display its X and Y values in a message box. I hope this will help. ![](https://community.thinkgeo.com/uploads/default/original/2X/2/2ec264a893a538b9f9a67e93097dd1b3e0b750ab.jpg)     ` private void Post7115()        {            winformsMap1.MapClick += new EventHandler(winformsMap1_MapClick);            winformsMap1.MapUnit = GeographyUnit.DecimalDegree;            winformsMap1.CurrentExtent = new RectangleShape(-97.7487, 30.274, -97.7343, 30.2658);            winformsMap1.BackgroundOverlay.BackgroundBrush = new GeoSolidBrush(GeoColor.StandardColors.LightGoldenrodYellow);            ShapeFileFeatureLayer streetLayer = new ShapeFileFeatureLayer(@"..\..\Data\austinstreets.shp");            streetLayer.ZoomLevelSet.ZoomLevel01.DefaultLineStyle = LineStyles.LocalRoad2;            streetLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;            LayerOverlay staticOverlay = new LayerOverlay();            staticOverlay.Layers.Add("StreetLayer", streetLayer);            winformsMap1.Overlays.Add(staticOverlay);            LineShape lineShape = new LineShape();            lineShape.Vertices.Add(new Vertex(-97.744, 30.2732));            lineShape.Vertices.Add(new Vertex(-97.747, 30.2693));            lineShape.Vertices.Add(new Vertex(-97.7382, 30.2698));            lineShape.Vertices.Add(new Vertex(-97.7358,30.2669));            MultipointShape multipointShape = new MultipointShape();            foreach (Vertex vertex in lineShape.Vertices)            {                multipointShape.Points.Add(new PointShape(vertex));            }                       InMemoryFeatureLayer inMemoryFeatureLayer = new InMemoryFeatureLayer();            inMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultPointStyle = PointStyles.CreateSimpleCircleStyle(GeoColor.StandardColors.Red, 12);            inMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultLineStyle = LineStyles.CreateSimpleLineStyle(GeoColor.StandardColors.Green, 3, true);            inMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;            inMemoryFeatureLayer.Open();            inMemoryFeatureLayer.EditTools.BeginTransaction();            inMemoryFeatureLayer.EditTools.Add(new Feature(multipointShape));            inMemoryFeatureLayer.EditTools.Add(new Feature(lineShape));            inMemoryFeatureLayer.EditTools.CommitTransaction();            inMemoryFeatureLayer.Close();            LayerOverlay lineOverlay = new LayerOverlay();            lineOverlay.Layers.Add("Line", inMemoryFeatureLayer);            winformsMap1.Overlays.Add(lineOverlay);            winformsMap1.Refresh(lineOverlay);        }        void winformsMap1_MapClick(object sender, MapClickWinformsMapEventArgs e)        {            FeatureLayer Layer = winformsMap1.FindFeatureLayer("Line");            Layer.Open();            Collection selectedFeatures = Layer.QueryTools.GetFeaturesNearestTo(e.WorldLocation, GeographyUnit.DecimalDegree, 2,ReturningColumnsType.NoColumns);  // GetFeaturesContaining(e.WorldLocation, new string[1] { "CNTRY_NAME" });            Layer.Close();            if (selectedFeatures.Count > 0)            {                foreach (Feature feature in selectedFeatures)                {                    if (feature.GetWellKnownType().ToString() == "Multipoint")                    {                        MultipointShape multipointShape = (MultipointShape)feature.GetShape();                        PointShape pointShape = multipointShape.GetClosestPointTo(e.WorldLocation, GeographyUnit.DecimalDegree);                        MessageBox.Show("X: " + Math.Round(pointShape.X,4) + " Y: " + Math.Round(pointShape.Y,4), "Vertex", MessageBoxButtons.OK, MessageBoxIcon.Information, MessageBoxDefaultButton.Button1, (MessageBoxOptions)0);                    }                }            }        }` ---
**Author:** ![Eric\_S](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/e/aca169/32.png) [@Eric\_S](https://community.thinkgeo.com/u/Eric_S)\ **Post date:** [February 19, 2010, 7:56am UTC](https://community.thinkgeo.com/t/how-to-simply-draw-and-select-vertices/1055/3 "2010-02-19T07:56:50Z")
Thanks Val, this works beatifully. Exactly the pointer I needed without having to work with an editOverlay’s control points.      Eric  ---
**Author:** ![Val](https://community.thinkgeo.com/letter_avatar_proxy/v4/letter/v/e56c9b/32.png) [@Val](https://community.thinkgeo.com/u/Val)\ **Post date:** [February 19, 2010, 9:30am UTC](https://community.thinkgeo.com/t/how-to-simply-draw-and-select-vertices/1055/4 "2010-02-19T09:30:01Z")
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