Latest Contributions by JohnStephens

I have a QC process that runs through some data, flags various features, and then I want it to write them out to a new database with an exact copy of the feature class (I can't copy the feature class completely, because not all of the features are flagged).  My code for flagging the data works fine, but when I go to insert my created feature buffer I get a vague COM Exception.  I've read that these errors usually occur with field/field value errors, but I've used a IFieldChecker, which reports no errors.  And I've gone through the created feature class fie and the values in the feature using (ComReleaser comReleaser = new ComReleaser()) {   IFeatureCursor featuresToCopy = fc.Search(qf, true);   comReleaser.ManageLifetime(featuresToCopy);   IFeature currFeat = featuresToCopy.NextFeature();   IFeatureCursor insertCursor = newFC.Insert(true);  comReleaser.ManageLifetime(insertCursor);   while (currFeat != null)         {           IFeatureBuffer featBuff = newFC.CreateFeatureBuffer();    // Add the original feature's geometry to the feature buffer.          featBuff.Shape = currFeat.Shape;      // Add all the original feature's fields to the feature buffer   AddFieldsToFeatureBuffer(ref featBuff, currFeat);                  try                 {                   insertCursor.InsertFeature(featBuff);                 }                 catch { throw; }                                                          currFeat = featuresToCopy.NextFeature();         } }  //This code was taken right from here  private void AddFieldsToFeatureBuffer(ref IFeatureBuffer featBuffer, IFeature feature) {     // Copy the attributes of the orig feature the new feature     IRowBuffer rowBuffer = (IRowBuffer)featBuffer;     IFields fieldsNew = rowBuffer.Fields;      IFields fields = feature.Fields;     for (int i = 0; i <= fields.FieldCount - 1; i++)     {         IField field = fields.get_Field(i);         if ((field.Type != esriFieldType.esriFieldTypeGeometry) &&             (field.Type != esriFieldType.esriFieldTypeOID))         {             int intFieldIndex = fieldsNew.FindField(field.Name);             if (intFieldIndex != -1)             {                 try                 {                     var value = feature.get_Value(i);                     featBuffer.set_Value(intFieldIndex, value);                 }                 catch (Exception ex) { WriteError(ex); }             }         }     } } Also, I'm not sure if it is related, but when I am debugging the code the execute function to check the members of the insert cursor does not work.  I am assuming it's because the cursor has an exclusive lock on the data. ... View more

For the Statistics geoprocessor tool one of the parameters is the "statistics_fields". It calls for the fields you want to get statistics on as well as the type of statistic. In pyton, it looks like this (see 3rd param): arcpy.Statistics_analysis("futrds", "C:/output/output.gdb/stats", [["Shape_Length", "SUM"]], "NM") My question is, how do I set up this parameter in .NET? Geoprocessor GP = new Geoprocessor();  Statistics stats = new Statistics(); stats.in_table = @"C:\Temp\Test\myRight.shp"; stats.out_table = @"C:\Temp\test.dbf"; stats.statistics_fields = "[['J_Fld','COUNT']]";  GP.Execute(stats, null); I've tried sending it strings formatted in several different ways, an array like the one in python, and a IVariantArray with no luck. Thanks. ... View more

Say I have the two attached tables that I want to join together in code using the "J_Fld".  As you can see, it is a one-to-many join and there will be one row in the left table that does not have a match in the right table.  I want to get a result that returns "all-results" like the join options in ArcMap (so include the one without a relationship).  If I used a QueryDefinition I get everything but the one without a relationship. The API has code for a IRelationshipClass: // Build a memory relationship class. Type memRelClassFactoryType = Type.GetTypeFromProgID(     "esriGeodatabase.MemoryRelationshipClassFactory"); IMemoryRelationshipClassFactory memRelClassFactory =      (IMemoryRelationshipClassFactory)Activator.CreateInstance(memRelClassFactoryType)     ; IRelationshipClass relationshipClass = memRelClassFactory.Open("ParcelsOwners",     parcelsFeatureClass, "PARCEL_ID", (IObjectClass)ownersTable, "PARCEL_ID",      "Is Owned By", "Owns", esriRelCardinality.esriRelCardinalityOneToOne);  // Open the RelQueryTable as a feature class. Type rqtFactoryType = Type.GetTypeFromProgID("esriGeodatabase.RelQueryTableFactory"); IRelQueryTableFactory rqtFactory = (IRelQueryTableFactory)Activator.CreateInstance     (rqtFactoryType); ITable relQueryTable = (ITable)rqtFactory.Open(relationshipClass, false, null, null,     String.Empty, false, false); If I change the cardinality to "esriRelCardinalityManyToMany" the return table only has 4 rows in it.  It looks like no matter what it returns a one-to-one and takes a "first case wins" approach. I was thinking the way to go about it is IRelationshipClass.GetRelationshipForObject, but it doesn't seem to like being passed a table row as an object. Any ideas? ... View more

I am looking for a non-geoprocessor solution. So, I have searched the forums and Google and have not found what I am looking for.  I have a single polygon (which is a dissolved buffer from a different feature class) and a separate feature class that I want to find the intersections between and then delete those features.  It appears to me that a SpatialQuery only operates on one feature class. I am guessing this could be done with a GeometryBag, but then I believe it would also find the intersections within the feature class, which I do not want to delete. Any help would be appreciated. ... View more