ThinkGeo.com    |     Documentation    |     Premium Support

"The given key was not present in the dictionary" Error on Refresh Call

#1

I'm getting this error on my refresh call and can't see where it is coming from:


"The given key was not present in the dictionary"


I've tried to snip out all relevant code here...


Initialization:



// INIT ThinkGeo MapSuite
try {
  winformsMap.MapUnit = GeographyUnit.DecimalDegree;
  winformsMap.BackgroundOverlay.BackgroundBrush = new GeoSolidBrush(GeoColor.GeographicColors.DeepOcean);
  winformsMap.CenterAt(new PointShape(-76.286, 36.827));
  winformsMap.ZoomToScale(winformsMap.ZoomLevelSet.ZoomLevel11.Scale);

  worldMapKitRenderLayer = new WorldMapKitRenderLayer(@"D:\data\ThinkGeo\ThinkGeoWorldMapKit");
  worldMapKitRenderLayer.LoadLayers();

  LayerOverlay worldMapKitRenderLayerOverlay = new LayerOverlay();          
  worldMapKitRenderLayerOverlay.Layers.Add(worldMapKitRenderLayer);
  winformsMap.Overlays.Add(worldMapKitRenderLayerOverlay);


  InMemoryFeatureLayer tracksFriendlyInMemoryFeatureLayer = new InMemoryFeatureLayer();
  tracksFriendlyInMemoryFeatureLayer.Open();
  tracksFriendlyInMemoryFeatureLayer.Columns.Add(new FeatureSourceColumn("Label"));
  tracksFriendlyInMemoryFeatureLayer.Close();
  tracksFriendlyInMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultTextStyle = new TextStyle("Label", new GeoFont("Verdana", 10, DrawingFontStyles.Bold), new GeoSolidBrush(GeoColor.StandardColors.White));
  tracksFriendlyInMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultTextStyle.BestPlacement = true;
  tracksFriendlyInMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultTextStyle.PointPlacement = PointPlacement.CenterRight;
  tracksFriendlyInMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultTextStyle.HaloPen = new GeoPen(GeoColor.StandardColors.Black, 1);   tracksFriendlyInMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultLineStyle.OuterPen = new GeoPen(GeoColor.StandardColors.DarkGreen, 2);
  tracksFriendlyInMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultPointStyle = new PointStyle(PointSymbolType.Square, new GeoSolidBrush(GeoColor.StandardColors.Green), new GeoPen(GeoColor.StandardColors.DarkGreen, 2), 10);
  tracksFriendlyInMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;

  LayerOverlay tracksFriendlyLayerOverlay = new LayerOverlay();
  tracksFriendlyLayerOverlay.Layers.Add(tracksFriendlyInMemoryFeatureLayer);

  winformsMap.Overlays.Add("Tracks|Friendly", tracksFriendlyLayerOverlay);


  winformsMap.Refresh();

} catch (Exception Exception) {
  log.Enqueue("Problem initializing mapping tools: " + Exception.Message);
}

Inside update map timer:



try {
  winformsMap.Overlays["Tracks|Friendly"].Lock.EnterWriteLock();
  LayerOverlay trackLayerOverlay = (LayerOverlay)winformsMap.Overlays["Tracks|Friendly"];
  InMemoryFeatureLayer trackInMemoryFeatureLayer = (InMemoryFeatureLayer)trackLayerOverlay.Layers[0];

  trackInMemoryFeatureLayer.InternalFeatures.Clear();

  for (int i = 0; i < MAX_TARGETS; i++) {
    if (!(hideUnknownTracks && targets<i>.trackClass == trackClassificationEnum.UNKNOWN)) {
      if ((targets<i>.timeLapseComms < TARGET_DROP_TIMEOUT && targets<i>.trackStatus == trackStatusEnum.TARGET_ACTIVE) || i == selectedIconTrackIndex) {

        Feature feature = new Feature(new PointShape(targets<i>.longitude, targets<i>.latitude));
        if (targets<i>.ais.isValid) {
          feature.ColumnValues.Add("Label", targets<i>.ais.name);
        } else {
          feature.ColumnValues.Add("Label", targets<i>.ID);
        }
        trackInMemoryFeatureLayer.InternalFeatures.Add("Tracks|Friendly|Icon|" + targets<i>.ID, feature);

        if (targets<i>.trackHistory.Count > 5) {
          feature = new Feature(new LineShape(targets<i>.trackHistory));
          trackInMemoryFeatureLayer.InternalFeatures.Add("Tracks|Friendly|Trail|" + targets<i>.ID, feature);
        }
      }
    }
  }

} catch (Exception ex) {
  log.Enqueue("ERROR: Problem updating track icons. - " + ex.Message);

} finally {
  winformsMap.Overlays["Tracks|Friendly"].Lock.ExitWriteLock();
}

winformsMap.Refresh((LayerOverlay)winformsMap.Overlays["Tracks|Friendly"]);

Where trackHistory is a Vertex Collection.


If I comment the "add lineshape feature" line, the code works fine showing tracks from our AIS receiver, otherwise I get the error after building up enough track history.


I know this is a pretty inefficient way to do this, but until I get a better understanding of MapSuite, this is how I can best understand what is going on.



#2

 Side question:  Why are my array index brackets turning into < and > characters when using the code tags?



#3

Nate, 



Thanks for your post, 



I cannot compile your code successfully because of some variables are not defined, so I cannot reproduce your problem exactly, I just made a simple sample and try to reproduce the exception what you occurred, the sample code is very easy, here is the code below: 



 
private void button1_Click(object sender, EventArgs e) 
{ 
Collection<Vertex> verteices1 = new Collection<Vertex>(); 
verteices1.Add(new Vertex(0.2, 0.5)); 
verteices1.Add(new Vertex(0.8, 60.2)); 
verteices1.Add(new Vertex(1.8, 70.1)); 
LineShape lineShape2 = new LineShape(verteices1); 
Feature feature = new Feature(lineShape2); 
InMemoryFeatureLayer inMemoryLayer = new InMemoryFeatureLayer(); 
inMemoryLayer.InternalFeatures.Add("Test", feature); 
inMemoryLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle.FillSolidBrush.Color = GeoColor.FromArgb(100, GeoColor.StandardColors.RoyalBlue); 
inMemoryLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle.OutlinePen.Color = GeoColor.StandardColors.Blue; 
inMemoryLayer.ZoomLevelSet.ZoomLevel01.DefaultLineStyle.OuterPen = new GeoPen(GeoColor.FromArgb(200, GeoColor.StandardColors.Red), 5); 
inMemoryLayer.ZoomLevelSet.ZoomLevel01.DefaultPointStyle.SymbolPen = new GeoPen(GeoColor.FromArgb(255, GeoColor.StandardColors.Green), 8); 
inMemoryLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20; 

LayerOverlay staticOverlay = new LayerOverlay(); 
staticOverlay.Layers.Add("InMemoryFeatureLayer", inMemoryLayer); 
winformsMap1.Overlays.Add(staticOverlay); 
winformsMap1.CurrentExtent = new RectangleShape(0, 100, 100, 0); 
winformsMap1.Refresh(); 
} 





According to my test, it can work fine, I cannot find out any exceptions, please review your code or send us a complete sample so that we can reproduce this problem exactly, 



Thanks, 



Scott,



#4

Getting my code to run as it does here might be tricky, so I cut the code out of the timer event and placed a simplified version of it into the initialization section and I get the same exception.  I think if I can figure out why it fails here, it will shed light on why it fails in the timer as well.



// INIT ThinkGeo MapSuite
try {
  winformsMap.MapUnit = GeographyUnit.DecimalDegree;
  winformsMap.BackgroundOverlay.BackgroundBrush = new GeoSolidBrush(GeoColor.GeographicColors.DeepOcean);
  winformsMap.CenterAt(new PointShape(-76.286, 36.827));
  winformsMap.ZoomToScale(winformsMap.ZoomLevelSet.ZoomLevel11.Scale);

  worldMapKitRenderLayer = new WorldMapKitRenderLayer(@"D:\data\ThinkGeo\ThinkGeoWorldMapKit");
  worldMapKitRenderLayer.LoadLayers();

  LayerOverlay worldMapKitRenderLayerOverlay = new LayerOverlay();          
  worldMapKitRenderLayerOverlay.Layers.Add(worldMapKitRenderLayer);
  winformsMap.Overlays.Add(worldMapKitRenderLayerOverlay);


  InMemoryFeatureLayer tracksFriendlyInMemoryFeatureLayer = new InMemoryFeatureLayer();
  tracksFriendlyInMemoryFeatureLayer.Open();
  tracksFriendlyInMemoryFeatureLayer.Columns.Add(new FeatureSourceColumn("Label"));
  tracksFriendlyInMemoryFeatureLayer.Close();
  tracksFriendlyInMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultTextStyle = new TextStyle("Label", new GeoFont("Verdana", 10, DrawingFontStyles.Bold), new GeoSolidBrush(GeoColor.StandardColors.White));
  tracksFriendlyInMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultTextStyle.BestPlacement = true;
  tracksFriendlyInMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultTextStyle.PointPlacement = PointPlacement.CenterRight;
  tracksFriendlyInMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultTextStyle.HaloPen = new GeoPen(GeoColor.StandardColors.Black, 1);   tracksFriendlyInMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultLineStyle.OuterPen = new GeoPen(GeoColor.StandardColors.DarkGreen, 2);
  tracksFriendlyInMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultPointStyle = new PointStyle(PointSymbolType.Square, new GeoSolidBrush(GeoColor.StandardColors.Green), new GeoPen(GeoColor.StandardColors.DarkGreen, 2), 10);
  tracksFriendlyInMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;

  LayerOverlay tracksFriendlyLayerOverlay = new LayerOverlay();
  tracksFriendlyLayerOverlay.Layers.Add(tracksFriendlyInMemoryFeatureLayer);

  winformsMap.Overlays.Add("Tracks|Friendly", tracksFriendlyLayerOverlay);


  // Something bad gets done to the map in here
  winformsMap.Overlays["Tracks|Friendly"].Lock.EnterWriteLock();
  LayerOverlay trackLayerOverlay = (LayerOverlay)winformsMap.Overlays["Tracks|Friendly"];
  InMemoryFeatureLayer trackInMemoryFeatureLayer = (InMemoryFeatureLayer)trackLayerOverlay.Layers[0];

  Feature feature = new Feature(new LineShape("LINESTRING(-76.286 36.827, -76.100 36.600)"));
  trackInMemoryFeatureLayer.InternalFeatures.Add("ID", feature);
  winformsMap.Overlays["Tracks|Friendly"].Lock.ExitWriteLock();
  // end of bad stuff


  winformsMap.Refresh();  // Exception thrown from here

} catch (Exception Exception) {
  log.Enqueue("Problem initializing mapping tools: " + Exception.Message);
}


#5

Nate, 
  
 Thanks for your response. 
  
 I do not quite understand your meaning exactly. It seems you are making progress, I am happy to see its happening. 
  
 Any more questions just feel free to let me know. 
  
 Thanks. 
  
 Yale 


#6

I would like to know if you get the same exception with this code that I do.  (The code in the last post I made)  If you are missing something, let me know.   I am not making any progress as I don't understand what the exception is trying to tell me.



#7

Nate,


Thanks for your response. I am ashamed with my misunderstanding and I should have tried your code.
 
I think the problem is when the feature is added, the corresponding column value was not added which will be used for labeling. I change a bit for the code and have a try on the following code, it should work.

// INIT ThinkGeo MapSuite
try
{
winformsMap1.MapUnit = GeographyUnit.DecimalDegree;
winformsMap1.BackgroundOverlay.BackgroundBrush = new GeoSolidBrush(GeoColor.GeographicColors.DeepOcean);
winformsMap1.CenterAt(new PointShape(-76.286, 36.827));                  
winformsMap1.ZoomToScale(winformsMap1.ZoomLevelSet.ZoomLevel11.Scale);
 
worldMapKitRenderLayer = new WorldMapKitRenderLayer(@"D:\data\ThinkGeo\ThinkGeoWorldMapKit");
worldMapKitRenderLayer.LoadLayers();
 
LayerOverlay worldMapKitRenderLayerOverlay = new LayerOverlay();                worldMapKitRenderLayerOverlay.Layers.Add(worldMapKitRenderLayer);
winformsMap1.Overlays.Add(worldMapKitRenderLayerOverlay);
 
 
InMemoryFeatureLayer tracksFriendlyInMemoryFeatureLayer = new InMemoryFeatureLayer();
tracksFriendlyInMemoryFeatureLayer.Open();
tracksFriendlyInMemoryFeatureLayer.Columns.Add(new FeatureSourceColumn("Label"));
tracksFriendlyInMemoryFeatureLayer.Close();
tracksFriendlyInMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultTextStyle = new TextStyle("Label", new GeoFont("Verdana", 10, DrawingFontStyles.Bold), new GeoSolidBrush(GeoColor.StandardColors.White));
tracksFriendlyInMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultTextStyle.BestPlacement = true;
tracksFriendlyInMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultTextStyle.PointPlacement = PointPlacement.CenterRight;
tracksFriendlyInMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultTextStyle.HaloPen = new GeoPen(GeoColor.StandardColors.Black, 1); tracksFriendlyInMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultLineStyle.OuterPen = new GeoPen(GeoColor.StandardColors.DarkGreen, 2);
tracksFriendlyInMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultPointStyle = new PointStyle(PointSymbolType.Square, new GeoSolidBrush(GeoColor.StandardColors.Green), new GeoPen(GeoColor.StandardColors.DarkGreen, 2), 10);
tracksFriendlyInMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
 
LayerOverlay tracksFriendlyLayerOverlay = new LayerOverlay();
tracksFriendlyLayerOverlay.Layers.Add(tracksFriendlyInMemoryFeatureLayer);
 
winformsMap1.Overlays.Add("Tracks|Friendly", tracksFriendlyLayerOverlay);
 
 
// Something bad gets done to the map in here               
 winformsMap1.Overlays["Tracks|Friendly"].Lock.EnterWriteLock();
LayerOverlay trackLayerOverlay = (LayerOverlay)winformsMap1.Overlays["Tracks|Friendly"];
InMemoryFeatureLayer trackInMemoryFeatureLayer = (InMemoryFeatureLayer)trackLayerOverlay.Layers[0];
 
Feature feature = new Feature(new LineShape("LINESTRING(-76.286 36.827, -76.100 36.600)"));
feature.ColumnValues.Add("Label", "Add Label Here");
trackInMemoryFeatureLayer.InternalFeatures.Add("ID", feature);
winformsMap1.Overlays["Tracks|Friendly"].Lock.ExitWriteLock();
// end of bad stuff
 
winformsMap1.Refresh(); // Exception thrown from here
}
catch (Exception Exception)
{
     //log.Enqueue("Problem initializing mapping tools: " + Exception.Message);
     System.Diagnostics.Debug.WriteLine(Exception.Message);
} 

 
Any more questions just feel free to let me know.
 
Thanks.
 
Yale

#8

Thanks!  That was it.


I didn't realize that when you add column values to a layer, they are required to be set for every feature.



#9

Nate, 
  
 Thanks for your letting us know your status. 
  
 Any more questions just feel free to let me know. 
  
 Thanks. 
  
 Yale