ArcGIS For Silverlight API 开发中利用WebService调用ArcObjects

      ADF之所以强大，除了其本身的类库外，它还能在服务器端调用AO，来完成比如在线编辑或者Geoemtry的处理工作；而ESRI官方的说法，建立在REST服务基础上的程序目前都不具备在线编辑的功能（因为要与服务器端的数据库打交道），但他们把这项功能作为日程，提到了研发计划内。目前而言，要在SilverlightAPI中完成数据编辑工作，他们的劝告是，“如果你不怕把你的双手弄脏，那就去做吧”。
       AO本身是COM组件，.NET是利用COMInterop技术与其打交道的，这显然是Silverlight的客户端环境办不到的。这就需要与服务器端进行通信。Silverlight与服务器端通信，最常用的是WebClient类，稍复杂的还有httpWebrequest类，而传统的ASP.NET Webservice与更强大的WCF则为远程调用AO提供了可能。

      下面是我做测试的一段代码：

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进行程序调试，可以正确显示出点坐标信息。  通过这个功能的成功测试后，就可在Silverlight环境下开发ARCGIS的强大应用功能了。