Latest Contributions by ShaningYu

I have the code below for testing whether a feature class is editable or not.  In this piece of code, I use     bool b_Delete = false;              // true for Delete, false for Update to control if the test is for Delete or for Update scenario.  The results that it works well for Delete Scenario, but not successful for the Update Scenario.  The error received is Error HRESULT E_FAIL has been returned from a call to a COM component. on the line:    featureCursor.UpdateFeature(feature); What's wrong in my code?  Thanks if you can help.   public  bool isFeatureEditable(string fcName, string versionName, ESRI.ArcGIS.Geodatabase.IWorkspace ws,             ESRI.ArcGIS.ArcMapUI.IMxDocument mxDoc)   {             ESRI.ArcGIS.Geodatabase.IVersionedWorkspace verWorkspace = (ESRI.ArcGIS.Geodatabase.IVersionedWorkspace)ws;             ESRI.ArcGIS.Geodatabase.IVersion editorVersion = (ESRI.ArcGIS.Geodatabase.IVersion)verWorkspace.FindVersion(versionName);             ESRI.ArcGIS.Carto.IFeatureLayer fLyr = LayerHelper.GetFeaturelayerFromTocByName(fcName, mxDoc);             if (fLyr != null) {                 ESRI.ArcGIS.Geodatabase.IWorkspaceEdit workspaceEdit = (ESRI.ArcGIS.Geodatabase.IWorkspaceEdit)ws;                 ESRI.ArcGIS.Geodatabase.IMultiuserWorkspaceEdit muWorkspaceEdit = (ESRI.ArcGIS.Geodatabase.IMultiuserWorkspaceEdit)editorVersion;                 muWorkspaceEdit.StartMultiuserEditing(ESRI.ArcGIS.Geodatabase.esriMultiuserEditSessionMode.esriMESMVersioned);                 if (workspaceEdit.IsBeingEdited())   {                     try  {                         // **** Updating ****                         workspaceEdit.StartEditing(true);                         workspaceEdit.StartEditOperation();                         ESRI.ArcGIS.Geodatabase.IFeature feature = fLyr.FeatureClass.GetFeature(1);                         bool b_Delete = false;              // true for Delete, false for Update                         if (b_Delete)                             feature.Delete();                         else {                             ESRI.ArcGIS.Geodatabase.IFields fields = fLyr.FeatureClass.Fields;                             int idx = -1;                             string sFieldName = "";                             for (int i = 0; i < fields.FieldCount; i++)  {                                 ESRI.ArcGIS.Geodatabase.IField field = fields.Field;                                 if (field.Editable && field.Type.ToString() == "esriFieldTypeString")  {                                     idx = i;                                     sFieldName = field.Name;                                     break;                                 }                             }                             string sValue = feature.get_Value(idx).ToString();                             feature.set_Value(idx, sValue + " New");                             // Create a new query filter.                             ESRI.ArcGIS.Geodatabase.IQueryFilter queryFilter = new ESRI.ArcGIS.Geodatabase.QueryFilterClass();                             queryFilter.WhereClause = "OBJECTID = " + feature.get_Value(feature.Fields.FindField("OBJECTID"));                             // Get an update cursor constrained by the query filter.                             ESRI.ArcGIS.Geodatabase.IFeatureCursor featureCursor = fLyr.FeatureClass.Update(queryFilter, false);                             featureCursor.UpdateFeature(feature);                             System.Runtime.InteropServices.Marshal.ReleaseComObject(featureCursor);                         }                         workspaceEdit.StopEditOperation();                         bool hasEdits = false;                         workspaceEdit.HasEdits(ref hasEdits);                         if (hasEdits)                             workspaceEdit.UndoEditOperation();                         workspaceEdit.StopEditing(true);                         return true;                     }  catch (Exception ex)  {                         string sMsg = ex.Message;                     }                 }             }             return false;         } ... View more

I need a piece of code to check if a layer in ArcMap is a FeautureLayer.                 IMap pMap = m_mxDoc.FocusMap;                 for (int i = 0; i < m_mxDoc.Maps.Count; i++) {                     ILayer pLayer = pMap.Layer;                     //if (typeof(pMap.Layer) is IFeatureLayer )   ???  How to code here? Appreciate if you can help. ... View more

I want to use an ArcObjects function to retrieve the SDE Connection through the .sde file.  I appreciate if you can help. ... View more

I need to find a piece of ArcObjects code to Iterate/Loop through all layers of a map service.  Appreciate if you can provide the source. ... View more