Help: Changing a point via form control makes existing point disappear

Question

Hi,
New to ArcObjects - I have a point in an .mxd layer that I would like to change via user interaction on a form (button click).  However, when I run my application and click to update the point, the existing point in the target layer completely disappears.  Can anyone point me in the right direction?

IMxDocument _mxDoc = (IMxDocument)_doc;
                        IMap map = (IMap)_mxDoc.FocusMap;
                        IGeoFeatureLayer gLayer = (IGeoFeatureLayer)map.get_Layer(2);
                        
                        
                        IRgbColor pColor = new RgbColorClass();
                        pColor.Red = 255;
                        pColor.Green = 255;
                        pColor.Blue = 0;

ISimpleMarkerSymbol sMarker = new SimpleMarkerSymbol();
                        sMarker.Color = pColor;
                        sMarker.Style = esriSimpleMarkerStyle.esriSMSDiamond;
                        sMarker.Size = 20;

ISimpleRenderer sRender = (ISimpleRenderer)gLayer.Renderer;
                        sRender.Symbol = (ISymbol)sMarker;
                        gLayer.Renderer = (IFeatureRenderer)sRender;

IActiveView vActive = (IActiveView)map;
                        vActive.Refresh();

Venkata_RaoTammineni · Answer

Below is the code I have been using. I stripped out all of the other form controls. I think I cast everything correctly and the problem was with the render. Thanks for taking a look at this. public partial class frmMain : Form { public frmMain() { InitializeComponent(); } //These hold the document and application references private IDocument _doc = null; private IApplication _app = null; //Point button code private void btnPointColor_Click(object sender, EventArgs e) { IMxDocument _mxDoc = (IMxDocument)_doc; //Cast as IMxDocument Interface IMap map = (IMap)_mxDoc.FocusMap; //cast _mxDoc as Carto IMap interface IGeoFeatureLayer gLayer = (IGeoFeatureLayer)map.get_Layer(2); //Cast map layer 3 as IGeoFeature layer //Set the new color for the point IRgbColor pColor = new RgbColorClass(); pColor.Red = 255; pColor.Green = 255; pColor.Blue = 0; //Point so we need a simple marker symbol ISimpleMarkerSymbol sMarker = new SimpleMarkerSymbol(); sMarker.Color = pColor; sMarker.Style = esriSimpleMarkerStyle.esriSMSDiamond; sMarker.Size = 20; //Need to render ISimpleRenderer sRender = new SimpleRenderer(); sRender.Symbol = (ISymbol)sMarker; gLayer.Renderer = sRender; //_mxDoc.UpdateContents(); IActiveView vActive = (IActiveView)map; vActive.Refresh(); } } Hi Please follow below steps.. 1) add basecommand class using System; using System.Drawing; using System.Runtime.InteropServices; using ESRI.ArcGIS.ADF.BaseClasses; using ESRI.ArcGIS.ADF.CATIDs; using ESRI.ArcGIS.Framework; using ESRI.ArcGIS.ArcMapUI; namespace PointRenderer { ///

/// Summary description for ShowPoint. ///

[Guid("797af0fa-03d9-4e41-8c61-1109e3aff787")] [ClassInterface(ClassInterfaceType.None)] [ProgId("PointRenderer.ShowPoint")] public sealed class ShowPoint : BaseCommand { #region COM Registration Function(s) [ComRegisterFunction()] [ComVisible(false)] static void RegisterFunction(Type registerType) { // Required for ArcGIS Component Category Registrar support ArcGISCategoryRegistration(registerType); // // TODO: Add any COM registration code here // } [ComUnregisterFunction()] [ComVisible(false)] static void UnregisterFunction(Type registerType) { // Required for ArcGIS Component Category Registrar support ArcGISCategoryUnregistration(registerType); // // TODO: Add any COM unregistration code here // } #region ArcGIS Component Category Registrar generated code ///

/// Required method for ArcGIS Component Category registration - /// Do not modify the contents of this method with the code editor. ///

private static void ArcGISCategoryRegistration(Type registerType) { string regKey = string.Format("HKEY_CLASSES_ROOT\CLSID\{{{0}}}", registerType.GUID); MxCommands.Register(regKey); } ///

/// Required method for ArcGIS Component Category unregistration - /// Do not modify the contents of this method with the code editor. ///

private static void ArcGISCategoryUnregistration(Type registerType) { string regKey = string.Format("HKEY_CLASSES_ROOT\CLSID\{{{0}}}", registerType.GUID); MxCommands.Unregister(regKey); } #endregion #endregion private IApplication m_application; public ShowPoint() { // // TODO: Define values for the public properties // base.m_category = "GIS_FORM"; //localizable text base.m_caption = "Render Point"; //localizable text base.m_message = "Render Point"; //localizable text base.m_toolTip = "Render Point"; //localizable text base.m_name = "Render Point"; //unique id, non-localizable (e.g. "MyCategory_ArcMapCommand") try { // // TODO: change bitmap name if necessary // string bitmapResourceName = GetType().Name + ".bmp"; base.m_bitmap = new Bitmap(GetType(), bitmapResourceName); } catch (Exception ex) { System.Diagnostics.Trace.WriteLine(ex.Message, "Invalid Bitmap"); } } #region Overriden Class Methods ///

/// Occurs when this command is created ///

/// Instance of the application public override void OnCreate(object hook) { if (hook == null) return; m_application = hook as IApplication; //Disable if it is not ArcMap if (hook is IMxApplication) base.m_enabled = true; else base.m_enabled = false; // TODO: Add other initialization code } ///

/// Occurs when this command is clicked ///

public override void OnClick() { // TODO: Add ShowPoint.OnClick implementation PointRender _pointRender = new PointRender(m_application); _pointRender.ShowDialog(); } #endregion } } 2) Add Form using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using ESRI.ArcGIS.ArcMapUI; using ESRI.ArcGIS.Carto; using ESRI.ArcGIS.Framework; using ESRI.ArcGIS.Display; namespace PointRenderer { public partial class PointRender : Form { private IApplication pApp = null; public PointRender(IApplication pApp) { this.pApp = pApp; InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { try { IMxDocument pMxDoc = pApp.Document as IMxDocument; IMap pMap = pMxDoc.FocusMap; IGeoFeatureLayer pGeoFeatLayer; pGeoFeatLayer = pMap.get_Layer(0) as IGeoFeatureLayer; IRgbColor pRGB = new RgbColorClass(); pRGB.Red = 84; pRGB.Green = 156; pRGB.Blue = 227; ISimpleMarkerSymbol pSimpleMarkerSinboml = new SimpleMarkerSymbolClass(); pSimpleMarkerSinboml.Color = pRGB; pSimpleMarkerSinboml.Style = esriSimpleMarkerStyle.esriSMSDiamond; pSimpleMarkerSinboml.Size = 10; ISimpleRenderer pSimpleRender = new SimpleRendererClass(); pSimpleRender.Symbol = pSimpleMarkerSinboml as ISymbol; pGeoFeatLayer.Renderer = pSimpleRender as IFeatureRenderer; pMxDoc.UpdateContents(); pMxDoc.ActiveView.Refresh(); } catch (Exception exp) { } } } }

JSan · Answer

Below is the code I have been using.  I stripped out all of the other form controls.  I think I cast everything correctly and the problem was with the render.  Thanks for taking a look at this.

public partial class frmMain : Form
    {
        public frmMain()
        {
            InitializeComponent();
        }

//These hold the document and application references
        private IDocument _doc = null;
        private IApplication _app = null;

//Point button code
        private void btnPointColor_Click(object sender, EventArgs e)
        {
            IMxDocument _mxDoc = (IMxDocument)_doc;     //Cast as IMxDocument Interface
            IMap map = (IMap)_mxDoc.FocusMap;           //cast _mxDoc as Carto IMap interface
            IGeoFeatureLayer gLayer = (IGeoFeatureLayer)map.get_Layer(2);   //Cast map layer 3 as IGeoFeature layer
                        
            //Set the new color for the point
            IRgbColor pColor = new RgbColorClass();
            pColor.Red = 255;
            pColor.Green = 255;
            pColor.Blue = 0;

//Point so we need a simple marker symbol
            ISimpleMarkerSymbol sMarker = new SimpleMarkerSymbol();
            sMarker.Color = pColor;
            sMarker.Style = esriSimpleMarkerStyle.esriSMSDiamond;
            sMarker.Size = 20;

//Need to render
            ISimpleRenderer sRender = new SimpleRenderer();
            sRender.Symbol = (ISymbol)sMarker;
            gLayer.Renderer = sRender;

//_mxDoc.UpdateContents();
            IActiveView vActive = (IActiveView)map;
            vActive.Refresh();
        }
    }

Venkata_RaoTammineni · Answer

Hi,
New to ArcObjects - I have a point in an .mxd layer that I would like to change via user interaction on a form (button click).  However, when I run my application and click to update the point, the existing point in the target layer completely disappears.  Can anyone point me in the right direction?

IMxDocument _mxDoc = (IMxDocument)_doc;
                        IMap map = (IMap)_mxDoc.FocusMap;
                        IGeoFeatureLayer gLayer = (IGeoFeatureLayer)map.get_Layer(2);
                        
                        
                        IRgbColor pColor = new RgbColorClass();
                        pColor.Red = 255;
                        pColor.Green = 255;
                        pColor.Blue = 0;

ISimpleMarkerSymbol sMarker = new SimpleMarkerSymbol();
                        sMarker.Color = pColor;
                        sMarker.Style = esriSimpleMarkerStyle.esriSMSDiamond;
                        sMarker.Size = 20;

ISimpleRenderer sRender = (ISimpleRenderer)gLayer.Renderer;
                        sRender.Symbol = (ISymbol)sMarker;
                        gLayer.Renderer = (IFeatureRenderer)sRender;

IActiveView vActive = (IActiveView)map;
                        vActive.Refresh();

what _doc is it Iapplication instance ? please can you send me complete code so that i understand the issue...