silverLight arcgis FeatureLayer 初始

FeatureLayer 实际上是Graphic包装了查询的一个图层，查询的接口很紧密，所以如果要在查询前面做些事，或者在查询中做些事情，很困难，不过看了一篇文章 有了思路
如下
The ArcGIS Silverlight/WPF API provides a FeatureLayer as an efficient means for referencing a layer that contains features (geometry and attributes) and resides _disibledevent=>
Rex HansenESRI Product EngineerArcGIS Server .NET, Silverlight/WPF, MapIt
原文：http://blogs.esri.com/Dev/blogs/silverlightwpf/archive/2010/01/23/Listen-for-updates-to-a-FeatureLayer.aspx

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