I'm attempting to query a feature class for all features that meet a certain criterion (in this case, the Status field is NULL). However, I'm not getting very far into the attempted method before ArcMap crashes completely. I have no reasonable idea on how to trace errors that cause a program crash, for starters, so I'm more confused than necessary, I expect. I'm building this in VS 2008 Express, for what it's worth.
public void PerformAttributeQuery(ESRI.ArcGIS.Geodatabase.IFeatureClass fc) { ESRI.ArcGIS.Geodatabase.IQueryFilter queryFilter = new ESRI.ArcGIS.Geodatabase.QueryFilterClass(); queryFilter.WhereClause = "[Status] IS NULL"; // create the where clause statement Everything is fine for that first couple of statements, but this query causes a crash:
// query the table passed into the function and use a cursor to hold the results ESRI.ArcGIS.Geodatabase.IFeatureCursor featurecursor = fc.Search(queryFilter, false);It crashes before reaching the next line (I put in debug message boxes for testing), but I'll put it here for propriety:
ESRI.ArcGIS.Geodatabase.IFeature feature = (ESRI.ArcGIS.Geodatabase.IFeature)featurecursor.NextFeature(); ESRI.ArcGIS.ArcMapUI.IContentsView currentContentsView = ArcMap.Document.CurrentContentsView as IContentsView; ESRI.ArcGIS.Carto.IFeatureLayer featureLayer = (ESRI.ArcGIS.Carto.IFeatureLayer)currentContentsView.SelectedItem; ESRI.ArcGIS.Carto.IFeatureSelection fSelection = featureLayer as ESRI.ArcGIS.Carto.IFeatureSelection; fSelection.Add(feature); FindCommandAndExecute(ArcMap.Application as ESRI.ArcGIS.Framework.IApplication, "{AB073B49-DE5E-11D1-AA80-00C04FA37860}"); }I cannibalized the PerformAttributeQuery snippet to work with FeatureClasses instead of Tables (or so I had hoped), if you'd like a proper reference. My questions are:
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public void PerformAttributeQuery(ESRI.ArcGIS.Geodatabase.IFeatureClass fc) { ESRI.ArcGIS.Geodatabase.IQueryFilter queryFilter = new ESRI.ArcGIS.Geodatabase.QueryFilterClass(); queryFilter.WhereClause = "[Status] IS NULL"; // create the where clause statement Everything is fine for that first couple of statements, but this query causes a crash:
// query the table passed into the function and use a cursor to hold the results ESRI.ArcGIS.Geodatabase.IFeatureCursor featurecursor = fc.Search(queryFilter, false);It crashes before reaching the next line (I put in debug message boxes for testing), but I'll put it here for propriety:
ESRI.ArcGIS.Geodatabase.IFeature feature = (ESRI.ArcGIS.Geodatabase.IFeature)featurecursor.NextFeature(); ESRI.ArcGIS.ArcMapUI.IContentsView currentContentsView = ArcMap.Document.CurrentContentsView as IContentsView; ESRI.ArcGIS.Carto.IFeatureLayer featureLayer = (ESRI.ArcGIS.Carto.IFeatureLayer)currentContentsView.SelectedItem; ESRI.ArcGIS.Carto.IFeatureSelection fSelection = featureLayer as ESRI.ArcGIS.Carto.IFeatureSelection; fSelection.Add(feature); FindCommandAndExecute(ArcMap.Application as ESRI.ArcGIS.Framework.IApplication, "{AB073B49-DE5E-11D1-AA80-00C04FA37860}"); }I cannibalized the PerformAttributeQuery snippet to work with FeatureClasses instead of Tables (or so I had hoped), if you'd like a proper reference. My questions are:
- How can I get better reporting of crash errors?
- Where did I go wrong? Answer: I must shamefacedly admit that I used the wrong characters to denote the location of the feature table I was querying. Changing the [Status] in my queryFilter.WhereClause to \"Status\" quite literally solved all obvious problems.
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