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InvalidOperationException

#1

Hi,


I like the multthreaded mode in the new release, it is much faster, but I am getting too many exceptions in the latest release when using the multithreaded mode. Here is another exception, I retrieved lots of data in my PostgreFeature layer, then tracked zoom in, no response, then tracked zoom in again and again, got the exception. Here is the stack trace:


When will the MapSuite Desktop 3.0 get stablized?  We have missed our deadline a lot, can't wait!


System.InvalidOperationException was unhandled

  Message="Collection was modified; enumeration operation may not execute."

  Source="mscorlib"

  StackTrace:

       at System.Collections.Generic.List`1.Enumerator.MoveNextRare()

       at System.Collections.Generic.List`1.Enumerator.MoveNext()

       at ThinkGeo.MapSuite.Core.InMemoryFeatureSource.GetFeaturesInsideBoundingBoxCore(RectangleShape boundingBox, IEnumerable`1 returningColumnNames)

       at ThinkGeo.MapSuite.Core.FeatureSource.GetFeaturesForDrawingCore(RectangleShape boundingBox, Double screenWidth, Double screenHeight, IEnumerable`1 returningColumnNames)

       at ThinkGeo.MapSuite.Core.FeatureSource.GetFeaturesForDrawing(RectangleShape boundingBox, Double screenWidth, Double screenHeight, IEnumerable`1 returningColumnNames)

       at ThinkGeo.MapSuite.Core.FeatureLayer.DrawCore(GeoCanvas canvas, Collection`1 labelsInAllLayers)

       at ThinkGeo.MapSuite.Core.Layer.Draw(GeoCanvas canvas, Collection`1 labelsInAllLayers)

       at ThinkGeo.MapSuite.DesktopEdition.ExtentInteractiveOverlay.DrawCore(GeoCanvas canvas)

       at ThinkGeo.MapSuite.DesktopEdition.Overlay.Draw(GeoCanvas canvas)

       at ThinkGeo.MapSuite.DesktopEdition.WinformsMap.x27d0591c2adda8d9(RectangleShape xb35a33b423b17f65, Overlay x99251f66cdabc2ad, Int32 xa209325f5c895f7e, Int32 x7454a0d1965919b1, GeographyUnit xbb704b4400ce6f76)

       at ThinkGeo.MapSuite.DesktopEdition.WinformsMap.x27d0591c2adda8d9(Object x9c95f4613bdc3113)

       at System.Threading.ExecutionContext.runTryCode(Object userData)

       at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)

       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)

       at System.Threading._ThreadPoolWaitCallback.PerformWaitCallbackInternal(_ThreadPoolWaitCallback tpWaitCallBack)

       at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback(Object state)

  InnerException: 

 



#2

Rose, 



It seems a threading issue from the exception description. Can you show me your code as maybe something is wrong there. We had a test with 190,000 records in postgre, display it and keep tracking zoom in, and it works fine. Here is the code: 




private void Form1_Load(object sender, EventArgs e)
        {
            winformsMap1.MapUnit = GeographyUnit.DecimalDegree;

            winformsMap1.CurrentExtent = new RectangleShape(-126.4, 48.8, -67.0, 19.0);
            winformsMap1.BackgroundOverlay.BackgroundBrush = new GeoSolidBrush(GeoColor.GeographicColors.ShallowOcean);

            string connectString = "Server=192.168.0.212;User Id=postgres;Password=thinkgeo;DataBase=postgis;";
            PostgreSqlFeatureLayer postgreLayer = new PostgreSqlFeatureLayer(connectString, "rail", "oid");
            postgreLayer.ZoomLevelSet.ZoomLevel01.DefaultLineStyle = LineStyles.Railway1;
            postgreLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
            
            LayerOverlay staticOverlay = new LayerOverlay();
            staticOverlay.Layers.Add("PostgreLayer", postgreLayer);
            winformsMap1.Overlays.Add(staticOverlay);

            winformsMap1.Refresh();
        }


Finally, are you using X64 version? we will have more tests on that if you are. 



Thanks, 



Ben