How to get the total number of vertex of FeatureLayer?

Question

ESRI.ArcGIS.Client.FeatureLayer mFeatureLayer = new ESRI.ArcGIS.Client.FeatureLayer();
 mFeatureLayer.Url = featureLayerUrl;
 mFeatureLayer.MaxAllowableOffset=600;
MyMap.Layers.Add(mFeatureLayer);

Now I want to know how many vertex the Client side drawed when loaded the FeatureLayer.
The FeatureLayer is a polygon layer. 
 Because I want to know the effect of the property "maxableoffset".

DominiqueBroux · Answer

I think the value of the VertexCount is the sum of the plygon's rings ,and it is the initial value,not the optimized value.In the other words,it is on server-side ,not the cilent -side.

The calculation is done at the client side. If you get the same result than at the server side, it means that your maxallowableoffset is not enough selective. Try with a higher value.
Note that the maxallowableoffset is a value given in map coordinates so the value is depending on your spatial reference and your map scale (e.g. a value that makes sense is 2*map.Resolution, it means that the distance between two vertices is at least 2 pixels).

zhouning · Answer

Thanks your reply!
And I tried your suggestion, but the value of the variable 'VertexCount' didn't change when I changed the value of MaxAllowableOffset(Even set it as zero). The code as below:
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  string featureLayerUrl = " http://server.arcgisonline.com/ArcGIS/rest/services/Demographics/USA_Average_Household_Size/MapServer/3";

FeatureLayer mFeatureLayer = new ESRI.ArcGIS.Client.FeatureLayer();
 mFeatureLayer.Url = featureLayerUrl;
 mFeatureLayer.MaxAllowableOffset=861;
 MyMap.Layers.Add(mFeatureLayer);
 mFeatureLayer.Initialized += new EventHandler<EventArgs>(StartTimer);
 mFeatureLayer.UpdateCompleted += new EventHandler(FeatureLayer_UpdateCompleted);

void FeatureLayer_UpdateCompleted(object sender, EventArgs e)
        { VertexCount = (from c in (from b in (from a in mFeatureLayer.Graphics select a.Geometry as ESRI.ArcGIS.Client.Geometry.Polygon) select b.Rings) select c.Count).Sum(); 
}
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I think the value of the VertexCount is the sum of the plygon's rings ,and it is the initial value,not the optimized value.In the other words,it is on server-side ,not the cilent -side.

SomeGISGuy · Answer

You should be able to do it uinsg a LINQ query. For example:
(from c in (from b in (from a in layer.Graphics select a.Geometry as Polygon) select b.Rings) select c.Count).Sum();