{"id":448,"date":"2009-04-26T04:13:00","date_gmt":"2009-04-25T12:13:00","guid":{"rendered":"http:\/\/blog.newnaw.com\/?p=448"},"modified":"2009-04-26T04:13:00","modified_gmt":"2009-04-25T12:13:00","slug":"arcgis-api-for-silverlight%e5%bc%80%e5%8f%91%e5%85%a5%e9%97%a8%ef%bc%885%ef%bc%89%ef%bc%9a%e4%bb%bb%e5%8a%a1%e5%a4%96%e5%8c%85-tasks","status":"publish","type":"post","link":"https:\/\/blog.newnaw.com\/?p=448","title":{"rendered":"ArcGIS API for Silverlight\u5f00\u53d1\u5165\u95e8\uff085\uff09\uff1a\u4efb\u52a1\u5916\u5305\u2014\u2014Tasks"},"content":{"rendered":"

        \u901a\u8fc7\u4e0a\u4e00\u8282\u7684\u5b66\u4e60\uff0c\u6211\u4eec\u5df2\u7ecf\u77e5\u9053\u4e86\u5982\u4f55\u4e0eGraphicLayer\u4ea4\u4e92\uff0c\u4f46\u6bd5\u7adfGIS\u4e0d\u662f\u4e00\u4e2a\u753b\u677f\uff0c\u6240\u4ee5\u8fd9\u8282\u6765\u770b\u4e00\u4e0b\u5982\u4f55\u901a\u8fc7Silverlight API\u5b8c\u6210GIS\u4e2d\u7684\u5206\u6790\u529f\u80fd\u3002
        GIS\u4e4b\u6240\u4ee5\u662f\u4e00\u4e2a\u901a\u7528\u7684\u5de5\u5177\uff0c\u5c31\u662f\u56e0\u4e3a\u5b83\u5177\u6709\u5404\u79cd\u5404\u6837\u5206\u6790\u548c\u5904\u7406\u6570\u636e\u7684\u80fd\u529b\u3002Silverlight API\u4e2d\u63d0\u4f9b\u4e86Task\uff0c\u4f7f\u6211\u4eec\u80fd\u591f\u8f7b\u677e\u5b8c\u6210\u5e38\u89c1\u7684\u5206\u6790\u4efb\u52a1\u3002
        \u5148\u6765\u8003\u8651\u4e00\u4e0b\u5403\u997a\u5b50\u7684\u573a\u666f\u3002\u8981\u60f3\u5403\u997a\u5b50\uff0c\u6211\u4eec\u9700\u8981\u5148\u53bb\u4e70\u83dc\uff0c\u4e70\u8089\uff0c\u56de\u5bb6\u540e\u5728\u53a8\u623f\u91cc\u6d17\u83dc\uff0c\u63c9\u9762\uff0c \u62cc\u9985\uff0c\u5305\u997a\u5b50\uff0c\u716e\u997a\u5b50\uff0c\u5403\u997a\u5b50\uff0c\u4e4b\u540e\u522b\u5fd8\u4e86\u6d17\u7897\uff1b\u53e6\u4e00\u79cd\u60c5\u51b5\u5c31\u662f\u53bb\u996d\u9986\uff0c\u544a\u8bc9\u670d\u52a1\u5458\u6211\u8981\u54033\u4e24\u8334\u9999\uff0c3\u4e24\u97ed\u83dc\u7684\u997a\u5b50\uff0c\u7136\u540e\u7b49\u7740\u997a\u5b50\u7aef\u5230\u4f60\u9762\u524d\uff0c\u5f00\u5403\uff0c\u8d70\u4eba\u3002
        \u5728ArcGIS Server\u7a0b\u5e8f\u5f00\u53d1\u4e2d\uff0c\u8981\u5b8c\u6210GIS\u7684\u5206\u6790\u529f\u80fd\u5176\u5b9e\u548c\u5403\u997a\u5b50\u662f\u4e00\u6837\u7684\u3002\u7528ADF\u7f16\u7a0b\u5c31\u50cf\u5728\u5bb6\u91cc\u5403\u997a\u5b50\uff0c\u9664\u4e86\u67b6\u8bbe\u670d\u52a1\u5668\uff0c\u6240\u6709\u7684\u5de5\u4f5c\u57fa\u672c\u4e0a\u4e5f\u90fd\u5f97\u6211\u4eec\u81ea\u5df1\u5728\u670d\u52a1\u5668\u7aef\u6765\u5b8c\u6210\uff0c\u8981\u5904\u7406\u7684\u5730\u65b9\u6bd4\u8f83\u591a\uff1b\u800c\u7528\u5ba2\u6237\u7aefAPI\u7f16\u7a0b\u76f8\u5f53\u4e8e\u53bb\u5916\u9762\u5403\u997a\u5b50\uff0c\u6211\u4eec\u53ea\u8981\u628a\u4efb\u52a1\u4ea4\u7ed9\u76f8\u5e94\u7684Task\uff0c\u4e4b\u540e\u63a5\u53d7\u7ed3\u679c\u5c31\u884c\u4e86\uff0c\u4e0d\u7528\u505a\u997a\u5b50\u3002\u552f\u4e00\u4e0d\u540c\u7684\u5c31\u662f\u5728\u5916\u9762\u5403\u5b8c\u997a\u5b50\u522b\u5fd8\u4e86\u4ed8\u94b1\uff0c\u800c\u7528Task\u5b8c\u6210\u5206\u6790\u4efb\u52a1\u5219\u662f\u514d\u8d39\u7684\u3002\u8fd9\u70b9\u4e5f\u4f53\u73b0\u5728\u4f7f\u7528\u5ba2\u6237\u7aefAPI\u4e2d\u7684Task\u65f6\uff0c\u662f\u7531ArcGIS Online\u63d0\u4f9b\u7ed9\u4f60\u7684\uff0c\u4e0d\u9700\u8981\u81ea\u5df1\u8d2d\u4e70AGS\u8f6f\u4ef6\u3002
        \u73b0\u5728\u6765\u770b\u770bSilverlight API\u76ee\u524d\u7ed9\u6211\u4eec\u63d0\u4f9b\u4e86\u90a3\u4e9bTask\u529f\u80fd\uff1a
Query\uff1a<\/span>\u80fd\u591f\u5728\u5df2\u7ecf\u53d1\u5e03\u7684\u670d\u52a1\u6570\u636e\u4e2d\uff0c\u901a\u8fc7\u5c5e\u6027\u6761\u4ef6\uff08\u53ef\u4ee5\u5c5e\u6027\u5b57\u6bb5\u4e2d\u8fdb\u884c\u5173\u7cfb\u5224\u65ad\uff0c\u5b57\u7b26\u67e5\u627e\u7b49\uff09\uff0c\u56fe\u5f62\u6761\u4ef6\uff08\u4e0e\u8f93\u5165\u7684\u56fe\u5f62\u76f8\u4ea4\u3001\u5305\u542b\u3001\u76f8\u79bb\u7b49\uff09\uff0c\u6216\u8005\u662f\u4e24\u8005\u7684\u7ec4\u5408\uff0c\u67e5\u8be2\u51fa\u6ee1\u8db3\u6761\u4ef6\u7684\u6570\u636e\u5e76\u8fd4\u56de\u3002\u76f8\u5f53\u4e8eEngine\u4e2d\u7684SpatialFilter\uff0c\u5f53\u7136\u4e5f\u662fQueryFilter\u3002
Find\uff1a<\/span>\u5728\u5730\u56fe\u6570\u636e\u7684\u5c5e\u6027\u5b57\u6bb5\u4e2d\u67e5\u627e\u5305\u542b\u6709\u5173\u952e\u5b57\u53c2\u6570\u7684\u6570\u636e\u5e76\u8fd4\u56de\u3002
Identity\uff1a<\/span>\u5bf9\u9f20\u6807\u5f53\u524d\u70b9\u51fb\u4f4d\u7f6e\u4e0a\u7684\u6570\u636e\u8fdb\u884c\u8fa8\u8bc6\u5e76\u8fd4\u56de\u7ed3\u679c\uff0c\u53ef\u4ee5\u5bf9\u591a\u4e2a\u56fe\u5c42\u7684\u6570\u636e\u8fdb\u884c\u8fa8\u8bc6\u3002
Address Locator\uff1a<\/span>\u8f93\u5165\u7ecf\u7eac\u5ea6\uff0c\u8fd4\u56de\u5730\u5740\u7ed3\u679c\uff08Geocoding\uff09\uff1b\u8f93\u5165\u4e00\u4e2a\u5730\u65b9\u7684\u5730\u5740\uff0c\u8fd4\u56de\u7ecf\u7eac\u5ea6\u7ed3\u679c\uff08Reverse Geocoding\uff09\u3002\u7531\u4e8e\u56fd\u5185\u5730\u56fe\u6570\u636e\u4fdd\u5bc6\u5de5\u4f5c\u505a\u7684\u76f8\u5f53\u597d\uff0c\u8fd9\u4e2aTask\u6682\u65f6\u7528\u4e0d\u5230\u3002
Geometry Service\uff1a<\/span>\u53ef\u4ee5\u5bf9\u8f93\u5165\u7684\u5730\u7406\u6570\u636e\u8fdb\u884c\u5982\u7f13\u51b2\u533a\uff0c\u52a8\u6001\u6295\u5f71\uff0c\u9762\u79ef\/\u5468\u957f\u91cf\u7b97\u7b49\u51e0\u4f55\u64cd\u4f5c\u3002
Geoprocessing\uff1a<\/span>\u80fd\u591f\u5b8c\u6210\u590d\u6742\u7684GIS\u4efb\u52a1\uff0c\u7c7b\u4f3cToolBox\u4e2d\u7684\u5de5\u5177\u3002
        \u62bd\u8c61\u4e00\u4e0b\uff0c\u53ef\u4ee5\u770b\u51fa\uff0cQuery\u5b8c\u5168\u53ef\u4ee5\u5b8c\u6210Identity\u548cFind\u7684\u5de5\u4f5c\uff0c\u4f46\u540e\u4e24\u8005\u5728\u7279\u5b9a\u573a\u5408\u4e0b\u4f7f\u7528\u8d77\u6765\u6bd4Query\u8981\u65b9\u4fbf\u7684\u591a\uff1bGeoprocessing\u5b8c\u5168\u53ef\u4ee5\u66ff\u4ee3Geometry Service\uff0c\u4f46\u662f\u5728\u5229\u7528REST API\u7f16\u5199\u7684\u7a0b\u5e8f\u4e2d\uff0c\u8981\u5c3d\u91cf\u4f7f\u7528Geometry Service\u3002
        \u518d\u62bd\u8c61\u4e00\u4e0b\uff0cSilverlight API\u4e2d\u7684\u8fd9\u51e0\u4e2aTask\u548cJavaScript\/Flex API\u4e2d\u7684Task\u662f\u5927\u540c\u5c0f\u5f02\u7684\uff0c\u56e0\u4e3a\u5176\u5b9e\u5b83\u4eec\u90fd\u662fAGS 9.3 REST API\u4e2d\u66b4\u9732\u51fa\u6765\u7684\u64cd\u4f5c\u8d44\u6e90\uff08Operation Resource\uff09\u89c1\u4e0b\u56fe\uff1a
\"\"id=\"BLOGGER_PHOTO_ID_5328652310336594274\"<\/a><\/p>\n

        \u540e\u9762\u7684\u4ee3\u7801\u4e2d\u5b9e\u9645\u4e0a\u4e5f\u662f\u628a\u8f93\u5165\u53c2\u6570\u5c01\u88c5\u8d77\u6765\u63d0\u4ea4\u5230\u4e86REST API\u7684\u7279\u5b9aEndpoint\u4e0a\u3002\u8981\u7406\u89e3\u597d\u5ba2\u6237\u7aefAPI\u4e2d\u7684Task\uff0c\u5efa\u8bae\u719f\u8bfbAGS\u7684REST SDK<\/a>\u3002
        Task\u7684\u7528\u6cd5\u57fa\u672c\u4e0a\u76f8\u540c\uff0c\u90fd\u9075\u5faa\u8fd9\u51e0\u4e2a\u6b65\u9aa4\uff1a\u521d\u59cb\u5316Task\uff0c\u8bbe\u7f6eTask\u6240\u9700\u53c2\u6570\uff0c\u63d0\u4ea4\u4efb\u52a1\uff0c\u7b49\u5f85\u670d\u52a1\u5668\u5b8c\u6210\u4efb\u52a1\u540e\uff0c\u5904\u7406\u8fd4\u56de\u7684\u7ed3\u679c\uff1b\u8fdb\u996d\u9986\uff0c\u60f3\u597d\u4f60\u8981\u5403\u4ec0\u4e48\u997a\u5b50\uff0c\u544a\u8bc9\u670d\u52a1\u5458\uff0c\u7b49\u997a\u5b50\u505a\u597d\u7aef\u4e0a\u6765\uff0c\u5f00\u59cb\u5403\u3002\u597d\u4e86\uff0c\u4e0b\u9762\u6211\u4eec\u5c31\u901a\u8fc7\u4e00\u4e2a\u5b9e\u4f8b\uff08\u70b9\u51fb\u8fd9\u91cc<\/a>\uff0c\u67e5\u770b\u5b9e\u4f8b\uff09\uff0c\u6765\u5b66\u4e60\u4e00\u4e0bQuery\u548cGeometry\u4e24\u4e2aTask\u7684\u7528\u6cd5\u3002
\"\"id=\"BLOGGER_PHOTO_ID_5328823292744875042\"<\/a><\/p>\n

        \u9996\u5148\u9009\u62e9\u5de5\u5177\u6761\u4e2d\u7684\u753b\u7ebf\u5de5\u5177\uff0c\u5728\u5c4f\u5e55\u4e0a\u753b\u4e00\u6761\u66f2\u7ebf\uff0c\u4f1a\u6839\u636e\u66f2\u7ebf\u81ea\u52a8\u751f\u6210\u4e00\u4e2a\u8ddd\u79bb100\u516c\u91cc\u7684\u7f13\u51b2\u533a\u663e\u793a\u5728\u5730\u56fe\u4e0a\uff0c\u4e4b\u540e\u5f00\u59cb\u67e5\u8be2\u7f13\u51b2\u533a\u56fe\u5f62\u7ecf\u8fc7\u7684\u5dde\uff08\u76f8\u4ea4\uff09\uff0c\u5c06\u7ed3\u679c\u663e\u793a\u5728\u5730\u56fe\u4e0a\u3002\u53ef\u4ee5\u5355\u51fb\u6bcf\u4e2a\u5dde\u67e5\u770b\u8be6\u7ec6\u4fe1\u606f\u3002\u8fd9\u91cc\u5047\u8bbe\u4f60\u5df2\u5b66\u4e60\u4e86\u524d\u51e0\u8282\u7684\u5185\u5bb9\uff0c\u53ea\u8ba8\u8bbaTask\u7528\u6cd5\u7684\u90e8\u5206\u3002
1\u3001\u5229\u7528\u6240\u753b\u7684\u7ebf\u751f\u6210\u7f13\u51b2\u533a\u3002\u753b\u7ebf\u5229\u7528\u7684\u662fDraw\u5de5\u5177\u4e2d\u7684Freehand\uff0c\u5728\u8fd9\u4e2a\u52a8\u4f5c\u5b8c\u6210\u540e\u4f1a\u89e6\u53d1Draw\u7684OnDrawCompleted\u4e8b\u4ef6\uff0c\u81ea\u7136\u53ef\u4ee5\u5728\u8fd9\u91cc\u5f00\u59cb\u8fdb\u884c\u7f13\u51b2\u533a\u7684\u5de5\u4f5c\uff0c\u7528\u7684\u662fGeometry Service\u91cc\u7684Buffer\u3002
        \u521d\u59cb\u5316Geometry Service\u3002\u5047\u8bbe\u5df2\u7ecf\u5728Map1\u4e2d\u6dfb\u52a0\u4e86ID\u4e3aglayerResult\u7684GraphicsLayer\uff0clinesymbolred\u662f\u63d0\u524d\u8bbe\u7f6e\u597d\u7684CartographicLineSymbol\uff1a
private void Draw1_OnDrawComplete(object sender, DrawEventArgs args)
{
Draw1.Deactivate();\/\/Freehand\u52a8\u4f5c\u5931\u6548
\/\/\u5c06Freehand\u753b\u7684\u66f2\u7ebf\u663e\u793a\u5728\u5730\u56fe\u4e0a
GraphicsLayer glayer = Map1.Layers[\"glayerResult\"] as GraphicsLayer;
Graphic g = new Graphic();
g.Symbol = linesymbolred;
g.Geometry = args.Geometry;
glayer.Graphics.Add(g);
\/\/\u521d\u59cb\u5316Geometry Service
GeometryService geometrytask = new GeometryService(\"http:\/\/sampleserver1.arcgisonline.com\/ArcGIS\/rest\/services\/Geometry\/GeometryServer\");
}<\/code>
        Geometry Service\u7684\u521d\u59cb\u5316\u4f7f\u7528\u6784\u9020\u51fd\u6570\u6765\u5b8c\u6210\u7684\uff0c\u91cc\u9762\u63a5\u53d7\u4e00\u4e2aURL\uff0c\u8fd9\u4e2a\u662fGeometry Service\u7684REST API Endpoint\u3002\u987a\u4fbf\u8bf4\u4e00\u4e0b\uff0c\u4e0d\u540c\u4e8e\u5176\u4ed6\u670d\u52a1\u6bd4\u5982MapService\uff0c\u4e00\u4e2aGIS Server\u53ea\u80fd\u53d1\u5e03\u4e00\u4e2aGeometryService\uff0c\u5e76\u4e14\u5b83\u7684\u540d\u79f0\u5fc5\u987b\u662fGeometry\u3002
        \u5f53\u4e00\u4e2aTask\u5b8c\u6210\u65f6\u4f1a\u89e6\u53d1Completed\u4e8b\u4ef6\uff0c\u5931\u8d25\u65f6\u4e5f\u6709Failed\u4e8b\u4ef6\uff0c\u5bf9\u8fd9\u4e24\u4e2a\u4e8b\u4ef6\u8fdb\u884c\u76d1\u542c\uff1a
geometrytask.BufferCompleted += new EventHandler(geometrytask_BufferCompleted);
geometrytask.Failed += new EventHandler(geometrytask_Failed);<\/code>
        \u8bbe\u7f6eBuffer\u64cd\u4f5c\u6240\u9700\u7684\u53c2\u6570\uff1a
BufferParameters bufferparameters = new BufferParameters();
bufferparameters.Unit = LinearUnit.Kilometer;
\/\/\u5fc5\u987b\u6307\u5b9a\u4e0b\u9762\u4e24\u4e2aspatialreference\uff0c\u5426\u5219buffer\u7ed3\u679c\u96c6\u4e3a\u7a7a
bufferparameters.BufferSpatialReference = new SpatialReference(3395);
bufferparameters.OutSpatialReference = Map1.SpatialReference;
bufferparameters.Distances.Add(100);
bufferparameters.Features.Add(g);<\/code>
        BufferParameters\u662f\u4e13\u95e8\u7528\u4e8eBuffer\u7684\u53c2\u6570\uff1bBufferSpatialReference\u662f\u5c06\u8981Buffer\u7684\u56fe\u5f62\u91cd\u65b0\u6295\u5f71\u5230\u8fd9\u4e2a\u5750\u6807\u7cfb\u4e0b\uff08\u5e38\u5e38\u9700\u8981\u6839\u636e\u5730\u56fe\u6570\u636e\u6240\u5728\u5730\u65b9\u7684\u60c5\u51b5\u6765\u8bbe\u7f6e\u8fd9\u4e2a\u53c2\u6570\uff09\uff0c\u5e76\u8bbe\u7f6eBuffer\u8ddd\u79bb\u7684\u5355\u4f4d\u4e3a\u516c\u91cc\uff0cBuffer\u7684\u8f93\u51fa\u4e00\u822c\u4e0e\u5730\u56fe\u5750\u6807\u7cfb\u4e00\u81f4\uff1bBuffer\u53c2\u6570\u6709\u4e00\u4e2aFeatures\u5c5e\u6027\uff0c\u662fList\u7c7b\u578b\uff0c\u91cc\u9762\u7684Graphic\u90fd\u5c06\u88abBuffer\u3002\u4e0b\u6765\u5c06Buffer\u7684\u4efb\u52a1\u63d0\u4ea4\u5230\u670d\u52a1\u5668\uff08\u53ef\u4ee5\u770b\u51fa\u4e3a\u4ec0\u4e48\u8fd9\u4e9b\u52a8\u4f5c\u8981\u53ebTask\uff09\uff1a
geometrytask.BufferAsync(bufferparameters);<\/code>
        \u4ee5\u4e0a\u4ee3\u7801\u90fd\u653e\u5728Draw1_OnDrawComplete\u51fd\u6570\u4e2d\u3002\u4efb\u52a1\u63d0\u4ea4\u5230\u670d\u52a1\u5668\u540e\uff0c\u7531Geometry Service\u63a5\u7ba1\uff0c\u8ba1\u7b97\uff0c\u5b8c\u6210\u540e\u4f1a\u7acb\u523b\u5c06\u7ed3\u679c\u8fd4\u56de\u7ed9\u6211\u4eec\uff0c\u901a\u77e5\u6211\u4eec\u7ed3\u679c\u5df2\u7ecf\u5b8c\u6210\u7684\u65b9\u5f0f\u5c31\u662f\u524d\u9762\u7ed1\u5b9a\u7684Completed\u4e8b\u4ef6\u3002\u63a5\u6536\u5230\u7ed3\u679c\u540e\uff0c\u9996\u5148\u5c06\u7f13\u51b2\u533a\u663e\u793a\u51fa\u6765\uff1a
private void geometrytask_BufferCompleted(object sender, GraphicsEventArgs args)
{
if (args.Results.Count>0)
{
GraphicsLayer glayer = Map1.Layers[\"glayerResult\"] as GraphicsLayer;
Graphic g = new Graphic();
g.Symbol = fillsymbolBuffer;
g.Geometry = args.Results[0].Geometry;
glayer.Graphics.Add(g);
}
}<\/code>
        \u5982\u56fe\uff1a
\"\"id=\"BLOGGER_PHOTO_ID_5328834839474361106\"<\/a>
2\u3001\u5229\u7528\u751f\u6210\u7f13\u51b2\u533a\u7684\u7f13\u51b2\u533a\u8fdb\u884c\u7a7a\u95f4\u67e5\u8be2\u3002\u8981\u8fbe\u5230\u6211\u4eec\u7684\u76ee\u7684\uff0c\u5c31\u8fd8\u9700\u8981\u8fdb\u884c\u4e00\u4e2aQuery\u7684Task\uff0c\u90a3\u4e48\u5c31\u53ef\u4ee5\u5728\u8fd9\u91cc\u9a6c\u4e0d\u505c\u8e44\u7684\u5f00\u59cbQuery\u7684Task\u3002\u6b65\u9aa4\u57fa\u672c\u90fd\u662f\u4e00\u6837\u7684\uff0c\u521d\u59cb\u5316\uff0c\u8bbe\u7f6e\u53c2\u6570\uff0c\u63d0\u4ea4\u7ed3\u679c\uff0c\u5904\u7406\u7ed3\u679c\uff1a
private void geometrytask_BufferCompleted(object sender, GraphicsEventArgs args)
{
if (args.Results.Count>0)
{
GraphicsLayer glayer = Map1.Layers[\"glayerResult\"] as GraphicsLayer;
Graphic g = new Graphic();
g.Symbol = fillsymbolBuffer;
g.Geometry = args.Results[0].Geometry;
glayer.Graphics.Add(g);
\/\/\u521d\u59cb\u5316QueryTask
QueryTask querytask = new QueryTask(\"http:\/\/sampleserver1.arcgisonline.com\/ArcGIS\/rest\/services\/Demographics\/ESRI_Census_USA\/MapServer\/5\");
\/\/\u51c6\u5907\u63a5\u6536\u7ed3\u679c\u6216\u8005\u5904\u7406\u5931\u8d25\u7684\u901a\u77e5
querytask.ExecuteCompleted += new EventHandler(querytask_ExecuteCompleted);
querytask.Failed += new EventHandler(querytask_Failed);
\/\/\u8bbe\u7f6eQuery Task\u6240\u9700\u7684\u53c2\u6570
Query query = new Query();
query.OutFields.Add(\"*\");\/\/\u4e5f\u987a\u4fbf\u8bbe\u7f6e\u4e86query.ReturnGeometry=true;
query.Geometry = g.Geometry;
query.SpatialRelationship = SpatialRelationship.esriSpatialRelIntersects;
\/\/\u5411\u670d\u52a1\u5668\u4e0a\u7684\u5bf9\u5e94\u56fe\u5c42\u63d0\u4ea4\u4efb\u52a1
querytask.ExecuteAsync(query);
Map1.Cursor = System.Windows.Input.Cursors.Wait;
}<\/p>\n

}<\/code>
        \u8fd9\u91cc\u7684\u67e5\u8be2\u5b9e\u5728\u7f8e\u56fd\u5dde\u7684\u56fe\u5c42\u4e0a\u8fdb\u884c\u7684\uff0c\u8be6\u7ec6\u4fe1\u606f\u5c06QueryTask\u6784\u9020\u51fd\u6570\u91cc\u7684\u90a3\u4e2a\u53c2\u6570\u8f93\u5165\u6d4f\u89c8\u5668\u67e5\u770b\uff1bquery.Geometry\u662f\u8bbe\u7f6e\u9700\u8981\u8fdb\u884c\u7a7a\u95f4\u67e5\u8be2\u7684\u56fe\u5f62\uff0c\u5c31\u662f\u4e0a\u9762\u7f13\u51b2\u533a\u7684\u7ed3\u679c\uff1bOutFields\u662f\u67e5\u8be2\u7ed3\u679c\u9700\u8981\u8fd4\u56de\u7684\u5b57\u6bb5\uff0c\u8fd9\u91cc\u8fd4\u56de\u5168\u90e8\u5b57\u6bb5\uff0c\u5982\u679c\u8fd4\u56de\u5168\u90e8\u5b57\u6bb5\uff0c\u5219\u5f3a\u5236\u8bbe\u7f6e\u4e86ReturnGeometry\u4e3atrue\uff0c\u5982\u679c\u6211\u4eec\u4e0d\u9700\u8981\u5904\u7406\u7ed3\u679c\u7684\u56fe\u5f62\u4fe1\u606f\uff0c\u5219\u53ef\u4ee5\u5c06\u8fd9\u4e2a\u53c2\u6570\u8bbe\u4e3afalse\uff0c\u4ee5\u8282\u7701\u6d41\u91cf\uff0c\u663e\u7136\u8fd9\u91cc\u4e0d\u662f\uff1b\u7a7a\u95f4\u5173\u7cfb\u53ef\u4ee5\u53c2\u8003API\uff0c\u4e0eEngine\u4e2d\u7684\u5b8c\u5168\u4e00\u81f4\u3002
        \u63a5\u4e0b\u6765\u5904\u7406QueryTask\u5b8c\u6210\u540e\u7684\u7ed3\u679c\uff1a
private void querytask_ExecuteCompleted(object sender, QueryEventArgs args)
{
GraphicsLayer graphicslayer = Map1.Layers[\"glayerResult\"] as GraphicsLayer;
FeatureSet featureset = args.FeatureSet;
if (featureset != null && featureset.Features.Count > 0)
{
graphicslayer.ClearGraphics();
listboxResults.Items.Clear();
foreach (Graphic graphic in featureset.Features)
{
graphic.Symbol = fillsymbolresult;
graphicslayer.Graphics.Add(graphic);
}
}
MyMapTip.GraphicsLayer = graphicslayer;
Map1.Cursor = System.Windows.Input.Cursors.Arrow;
}<\/code>
        \u4e0a\u9762\u5904\u7406\u7a7a\u95f4\u67e5\u8be2\u7684\u7ed3\u679c\u53ea\u662f\u5c06\u56fe\u5f62\u663e\u793a\u4e86\u51fa\u6765\uff0c\u90a3\u4e48\u5bf9\u4e8e\u5355\u51fb\u67d0\u4e2a\u5dde\u540e\uff0c\u663e\u793a\u51fa\u5176\u8be6\u7ec6\u4fe1\u606f\u8be5\u600e\u4e48\u529e\u5462\uff1f\u4ece\u56fe\u4e00\u53ef\u4ee5\u770b\u51fa\uff0c\u7528\u5230\u4e86Silverlight\u7684DataGrid\u63a7\u4ef6\uff0c\u4fe1\u606f\u4ece\u54ea\u91cc\u53bb\u5462\uff1f\u8bb0\u5f97\u4e0a\u9762\u6211\u4eec\u8bbe\u7f6e\u7ed3\u679c\u4e2d\u8fd4\u56de\u7684\u5168\u90e8\u5c5e\u6027\u5b57\u6bb5\u5417\uff1f\u5b83\u4eec\u5b58\u50a8\u5728\u6bcf\u4e2aGraphic\u7684Attributes\u5c5e\u6027\u4e2d\u3002\u8981\u4e48\u7ed1\u5b9a\u5230DataGrid\u91cc\uff0c\u8981\u4e48\u4e00\u6761\u6761\u6dfb\u52a0\u2026\u2026\u4f60\u53ef\u80fd\u5df2\u7ecf\u53d1\u73b0\u4e86\u8fd9\u6761\u8bed\u53e5MyMapTip.GraphicsLayer = graphicslayer;\uff0c\u8fd8\u8bb0\u5f97\u7b2c\u4e09\u8282\u7684Widgets\u5417\uff1f\u90a3\u91cc\u6211\u4eec\u843d\u4e0b\u4e86MapTip\u8fd9\u4e2a\u5c0f\u5bb6\u4f19\uff0c\u73b0\u5728\u6d3e\u4e0a\u7528\u573a\u4e86\u3002\u9664\u4e86\u5728\u8fd9\u91cc\u8bbe\u7f6eMapTip\u7684GraphicsLayer\u5c5e\u6027\u5916\uff0c\u5728xaml\u4e2d\u6709\u5982\u4e0b\u7684\u5b9a\u4e49\uff1a
<esriWidgets:MapTip x:Name=\"MyMapTip\" BorderBrush=\"#99000000\"
BorderThickness=\"1\" Title=\"\u8be6\u7ec6\u4fe1\u606f\" VerticalOffset=\"10\"
HorizontalOffset=\"10\" Background=\"#DDFFFFFF\" \/><\/code>
        \u4ec5\u6b64\u800c\u5df2\u3002MapTip\u4f1a\u81ea\u52a8\u627e\u5bfb\u81ea\u5df1GraphicsLayer\u4e2d\u7684Graphic\uff0c\u5f53\u9f20\u6807\u60ac\u505c\u5728\u67d0\u4e2aGrpahic\u4e0a\u65f6\uff0c\u4f1a\u81ea\u52a8\u8bfb\u53d6\u5b83\u7684Attributes\u5c5e\u6027\u5e76\u663e\u793a\uff0c\u5c0f\u73a9\u5177\u53c8\u53d1\u6325\u4e86\u5927\u4f5c\u7528\u3002
        \u522b\u5fd8\u4e86\u4e07\u4e00\u5904\u7406\u4efb\u52a1\u5931\u8d25\u65f6\u7684\u63d0\u793a\uff1a
private void geometrytask_Failed(object sender, TaskFailedEventArgs args)
{
MessageBox.Show(\"Buffer Error:\" + args.Error);
}<\/p>\n

private void querytask_Failed(object sender, TaskFailedEventArgs args)
{
MessageBox.Show(\"Query failed: \" + args.Error);
Map1.Cursor = System.Windows.Input.Cursors.Arrow;
GraphicsLayer graphicslayer = Map1.Layers[\"glayerResult\"] as GraphicsLayer;
graphicslayer.ClearGraphics();
}<\/code>
        \u672c\u8282\u5185\u5bb9\u5b8c\u6bd5\u3002\u4e0a\u9762\u8bb2\u7684\u76f8\u5bf9\u7b80\u7565\uff0c\u8981\u7406\u89e3\u5404\u4e2aTask\u548c\u53c2\u6570\u7684\u7528\u6cd5\uff0c\u8fd8\u662f\u9700\u8981\u719f\u6089Silverlight API<\/a>\u548c\u524d\u9762\u63d0\u5230\u7684REST API\u3002\u53e6\u5916\uff0cGeoprocessing Service\u5b9e\u9645\u4e0a\u662f\u6700\u5f3a\u5927Task\uff0c\u5982\u679c\u6709\u81ea\u5df1\u7684GIS Server\uff0c\u5b8c\u5168\u53ef\u4ee5\u5728\u4e0a\u9762\u53d1\u5e03\u81ea\u5236\u7684Model\u6216\u8005Python\u811a\u672c\uff0c\u4ee5\u5b8c\u6210\u5404\u79cdGIS\u5206\u6790\u4efb\u52a1\uff0c\u7b80\u5355\u7684\u5728\u7ebf\u7f16\u8f91\u4e5f\u662f\u53ef\u80fd\u7684\u3002\u5b83\u7684\u7528\u6cd5\u4e5f\u4e07\u53d8\u4e0d\u79bb\u5176\u5b97\uff1a\u521d\u59cb\u5316\uff0c\u8bbe\u7f6e\u53c2\u6570\uff0c\u63d0\u4ea4\u4efb\u52a1\uff0c\u5904\u7406\u7ed3\u679c\u3002\u4e0d\u540c\u7684\u662fGeoprocessing Service\u6709\u4e24\u79cd\u63d0\u4ea4\u4efb\u52a1\u7684\u65b9\u6cd5\uff1a\u540c\u6b65\u548c\u5f02\u6b65\u3002\u524d\u8005\u670d\u52a1\u5668\u7aef\u5904\u7406\u5b8c\u4efb\u52a1\u540e\u4f1a\u7acb\u5373\u5c06\u7ed3\u679c\u53d1\u9001\u56de\u5ba2\u6237\u7aef\uff1b\u540e\u8005\u5c06\u4efb\u52a1\u63d0\u4ea4\u540e\u4f1a\u5f97\u5230\u670d\u52a1\u5668\u7aef\u8fd4\u56de\u7684\u4e00\u4e2aJobID\uff0c\u5373\u4f7f\u4efb\u52a1\u5904\u7406\u5b8c\u6210\u4e5f\u4e0d\u4f1a\u7acb\u5373\u8fd4\u56de\uff0c\u800c\u662f\u9700\u8981\u4f60\u62ff\u8fd9\u4e2aJobID\u53bb\u8be2\u95ee\u670d\u52a1\u5668\uff1a\u5b8c\u6210\u4e86\u5417\uff1f\u5b8c\u6210\u4e86\u5417\uff1f\u5b8c\u6210\u4e86\u5417\uff1f\u5982\u679c\u5b8c\u6210\uff0c\u5219\u53ef\u4ee5\u53d6\u56de\u76f8\u5e94\u7684\u7ed3\u679c\u3002
        \u524d\u9762\u8bf4\u5230\uff0c\u867d\u7136\u53bb\u5916\u9762\u5403\u997a\u5b50\u5f88\u65b9\u4fbf\uff0c\u4f46\u662f\u6bd5\u7adf\u90a3\u662f\u4eba\u5bb6\u505a\u597d\u7684\uff0c\u5bf9\u4e8e\u8001\u9955\u6765\u8bf4\u8fd8\u9700\u8981\u81ea\u5df1\u7684\u53e3\u611f\uff0c\u81ea\u5df1\u4e0b\u53a8\u6bd5\u7adf\u80fd\u63a7\u5236\u6574\u4e2a\u8fc7\u7a0b\u7684\u65b9\u65b9\u9762\u9762\uff0c\u54ea\u6015\u4f60\u60f3\u505a\u51fa\u997a\u7acb\u65b9\u4e5f\u90fd\u662f\u6709\u53ef\u80fd\u7684\u3002\u540c\u6837\uff0cADF\u7f16\u7a0b\u53ef\u4ee5\u8c03\u7528\u670d\u52a1\u5668\u7aef\u7684ArcObjects\uff0c\u8ba9\u4f60\u4e3a\u6240\u6b32\u4e3a\uff0c\u8fd9\u70b9\u662f\u5ba2\u6237\u7aefAPI\u65e0\u8bba\u5982\u4f55\u4e5f\u529e\u4e0d\u5230\u7684\u3002
        \u4e0b\u4e00\u8282\u6211\u4eec\u6765\u5bf9Silverlight API\u4e2d\u7684\u56fe\u5c42\u7c7b\u578b\u505a\u4e00\u4e2a\u5c0f\u7ed3\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

        \u901a\u8fc7\u4e0a\u4e00\u8282\u7684\u5b66\u4e60\uff0c\u6211\u4eec\u5df2\u7ecf\u77e5\u9053\u4e86\u5982\u4f55\u4e0eGraphicLayer\u4ea4\u4e92\uff0c\u4f46\u6bd5\u7adfGIS\u4e0d\u662f\u4e00\u4e2a\u753b\u677f\uff0c\u6240\u4ee5\u8fd9\u8282\u6765\u770b\u4e00\u4e0b\u5982\u4f55\u901a\u8fc7Silverlight API\u5b8c\u6210GIS\u4e2d\u7684\u5206\u6790\u529f\u80fd\u3002        GIS\u4e4b\u6240\u4ee5\u662f\u4e00\u4e2a\u901a\u7528\u7684\u5de5\u5177\uff0c\u5c31\u662f\u56e0\u4e3a\u5b83\u5177\u6709\u5404\u79cd\u5404\u6837\u5206\u6790\u548c\u5904\u7406\u6570\u636e\u7684\u80fd\u529b\u3002Silverlight API\u4e2d\u63d0\u4f9b\u4e86Task\uff0c\u4f7f\u6211\u4eec\u80fd\u591f\u8f7b\u677e\u5b8c\u6210\u5e38\u89c1\u7684\u5206\u6790\u4efb\u52a1\u3002        \u5148\u6765\u8003\u8651\u4e00\u4e0b\u5403\u997a\u5b50\u7684\u573a\u666f\u3002\u8981\u60f3\u5403\u997a\u5b50\uff0c\u6211\u4eec\u9700\u8981\u5148\u53bb\u4e70\u83dc\uff0c\u4e70\u8089\uff0c\u56de\u5bb6\u540e\u5728\u53a8\u623f\u91cc\u6d17\u83dc\uff0c\u63c9\u9762\uff0c \u62cc\u9985\uff0c\u5305\u997a\u5b50\uff0c\u716e\u997a\u5b50\uff0c\u5403\u997a\u5b50\uff0c\u4e4b\u540e\u522b\u5fd8\u4e86\u6d17\u7897\uff1b\u53e6\u4e00\u79cd\u60c5\u51b5\u5c31\u662f\u53bb\u996d\u9986\uff0c\u544a\u8bc9\u670d\u52a1\u5458\u6211\u8981\u54033\u4e24\u8334\u9999\uff0c3\u4e24\u97ed\u83dc\u7684\u997a\u5b50\uff0c\u7136\u540e\u7b49\u7740\u997a\u5b50\u7aef\u5230\u4f60\u9762\u524d\uff0c\u5f00\u5403\uff0c\u8d70\u4eba\u3002        \u5728ArcGIS Server\u7a0b\u5e8f\u5f00\u53d1\u4e2d\uff0c\u8981\u5b8c\u6210GIS\u7684\u5206\u6790\u529f\u80fd\u5176\u5b9e\u548c\u5403\u997a\u5b50\u662f\u4e00\u6837\u7684\u3002\u7528ADF\u7f16\u7a0b\u5c31\u50cf\u5728\u5bb6\u91cc\u5403\u997a\u5b50\uff0c\u9664\u4e86\u67b6\u8bbe\u670d\u52a1\u5668\uff0c\u6240\u6709\u7684\u5de5\u4f5c\u57fa\u672c\u4e0a\u4e5f\u90fd\u5f97\u6211\u4eec\u81ea\u5df1\u5728\u670d\u52a1\u5668\u7aef\u6765\u5b8c\u6210\uff0c\u8981\u5904\u7406\u7684\u5730\u65b9\u6bd4\u8f83\u591a\uff1b\u800c\u7528\u5ba2\u6237\u7aefAPI\u7f16\u7a0b\u76f8\u5f53\u4e8e\u53bb\u5916\u9762\u5403\u997a\u5b50\uff0c\u6211\u4eec\u53ea\u8981\u628a\u4efb\u52a1\u4ea4\u7ed9\u76f8\u5e94\u7684Task\uff0c\u4e4b\u540e\u63a5\u53d7\u7ed3\u679c\u5c31\u884c\u4e86\uff0c\u4e0d\u7528\u505a\u997a\u5b50\u3002\u552f\u4e00\u4e0d\u540c\u7684\u5c31\u662f\u5728\u5916\u9762\u5403\u5b8c\u997a\u5b50\u522b\u5fd8\u4e86\u4ed8\u94b1\uff0c\u800c\u7528Task\u5b8c\u6210\u5206\u6790\u4efb\u52a1\u5219\u662f\u514d\u8d39\u7684\u3002\u8fd9\u70b9\u4e5f\u4f53\u73b0\u5728\u4f7f\u7528\u5ba2\u6237\u7aefAPI\u4e2d\u7684Task\u65f6\uff0c\u662f\u7531ArcGIS Online\u63d0\u4f9b\u7ed9\u4f60\u7684\uff0c\u4e0d\u9700\u8981\u81ea\u5df1\u8d2d\u4e70AGS\u8f6f\u4ef6\u3002        \u73b0\u5728\u6765\u770b\u770bSilverlight API\u76ee\u524d\u7ed9\u6211\u4eec\u63d0\u4f9b\u4e86\u90a3\u4e9bTask\u529f\u80fd\uff1aQuery\uff1a\u80fd\u591f\u5728\u5df2\u7ecf\u53d1\u5e03\u7684\u670d\u52a1\u6570\u636e\u4e2d\uff0c\u901a\u8fc7\u5c5e\u6027\u6761\u4ef6\uff08\u53ef\u4ee5\u5c5e\u6027\u5b57\u6bb5\u4e2d\u8fdb\u884c\u5173\u7cfb\u5224\u65ad\uff0c\u5b57\u7b26\u67e5\u627e\u7b49\uff09\uff0c\u56fe\u5f62\u6761\u4ef6\uff08\u4e0e\u8f93\u5165\u7684\u56fe\u5f62\u76f8\u4ea4\u3001\u5305\u542b\u3001\u76f8\u79bb\u7b49\uff09\uff0c\u6216\u8005\u662f\u4e24\u8005\u7684\u7ec4\u5408\uff0c\u67e5\u8be2\u51fa\u6ee1\u8db3\u6761\u4ef6\u7684\u6570\u636e\u5e76\u8fd4\u56de\u3002\u76f8\u5f53\u4e8eEngine\u4e2d\u7684SpatialFilter\uff0c\u5f53\u7136\u4e5f\u662fQueryFilter\u3002Find\uff1a\u5728\u5730\u56fe\u6570\u636e\u7684\u5c5e\u6027\u5b57\u6bb5\u4e2d\u67e5\u627e\u5305\u542b\u6709\u5173\u952e\u5b57\u53c2\u6570\u7684\u6570\u636e\u5e76\u8fd4\u56de\u3002Identity\uff1a\u5bf9\u9f20\u6807\u5f53\u524d\u70b9\u51fb\u4f4d\u7f6e\u4e0a\u7684\u6570\u636e\u8fdb\u884c\u8fa8\u8bc6\u5e76\u8fd4\u56de\u7ed3\u679c\uff0c\u53ef\u4ee5\u5bf9\u591a\u4e2a\u56fe\u5c42\u7684\u6570\u636e\u8fdb\u884c\u8fa8\u8bc6\u3002Address 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API\u4e2d\u7684Task\u662f\u5927\u540c\u5c0f\u5f02\u7684\uff0c\u56e0\u4e3a\u5176\u5b9e\u5b83\u4eec\u90fd\u662fAGS 9.3 REST API\u4e2d\u66b4\u9732\u51fa\u6765\u7684\u64cd\u4f5c\u8d44\u6e90\uff08Operation Resource\uff09\u89c1\u4e0b\u56fe\uff1a         \u540e\u9762\u7684\u4ee3\u7801\u4e2d\u5b9e\u9645\u4e0a\u4e5f\u662f\u628a\u8f93\u5165\u53c2\u6570\u5c01\u88c5\u8d77\u6765\u63d0\u4ea4\u5230\u4e86REST API\u7684\u7279\u5b9aEndpoint\u4e0a\u3002\u8981\u7406\u89e3\u597d\u5ba2\u6237\u7aefAPI\u4e2d\u7684Task\uff0c\u5efa\u8bae\u719f\u8bfbAGS\u7684REST 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        \u9996\u5148\u9009\u62e9\u5de5\u5177\u6761\u4e2d\u7684\u753b\u7ebf\u5de5\u5177\uff0c\u5728\u5c4f\u5e55\u4e0a\u753b\u4e00\u6761\u66f2\u7ebf\uff0c\u4f1a\u6839\u636e\u66f2\u7ebf\u81ea\u52a8\u751f\u6210\u4e00\u4e2a\u8ddd\u79bb100\u516c\u91cc\u7684\u7f13\u51b2\u533a\u663e\u793a\u5728\u5730\u56fe\u4e0a\uff0c\u4e4b\u540e\u5f00\u59cb\u67e5\u8be2\u7f13\u51b2\u533a\u56fe\u5f62\u7ecf\u8fc7\u7684\u5dde\uff08\u76f8\u4ea4\uff09\uff0c\u5c06\u7ed3\u679c\u663e\u793a\u5728\u5730\u56fe\u4e0a\u3002\u53ef\u4ee5\u5355\u51fb\u6bcf\u4e2a\u5dde\u67e5\u770b\u8be6\u7ec6\u4fe1\u606f\u3002\u8fd9\u91cc\u5047\u8bbe\u4f60\u5df2\u5b66\u4e60\u4e86\u524d\u51e0\u8282\u7684\u5185\u5bb9\uff0c\u53ea\u8ba8\u8bbaTask\u7528\u6cd5\u7684\u90e8\u5206\u30021\u3001\u5229\u7528\u6240\u753b\u7684\u7ebf\u751f\u6210\u7f13\u51b2\u533a\u3002\u753b\u7ebf\u5229\u7528\u7684\u662fDraw\u5de5\u5177\u4e2d\u7684Freehand\uff0c\u5728\u8fd9\u4e2a\u52a8\u4f5c\u5b8c\u6210\u540e\u4f1a\u89e6\u53d1Draw\u7684OnDrawCompleted\u4e8b\u4ef6\uff0c\u81ea\u7136\u53ef\u4ee5\u5728\u8fd9\u91cc\u5f00\u59cb\u8fdb\u884c\u7f13\u51b2\u533a\u7684\u5de5\u4f5c\uff0c\u7528\u7684\u662fGeometry Service\u91cc\u7684Buffer\u3002        \u521d\u59cb\u5316Geometry Service\u3002\u5047\u8bbe\u5df2\u7ecf\u5728Map1\u4e2d\u6dfb\u52a0\u4e86ID\u4e3aglayerResult\u7684GraphicsLayer\uff0clinesymbolred\u662f\u63d0\u524d\u8bbe\u7f6e\u597d\u7684CartographicLineSymbol\uff1aprivate void Draw1_OnDrawComplete(object sender, DrawEventArgs args) { Draw1.Deactivate();\/\/Freehand\u52a8\u4f5c\u5931\u6548 \/\/\u5c06Freehand\u753b\u7684\u66f2\u7ebf\u663e\u793a\u5728\u5730\u56fe\u4e0a GraphicsLayer glayer = Map1.Layers[“glayerResult”] as GraphicsLayer; Graphic g = new Graphic(); g.Symbol = linesymbolred; g.Geometry = args.Geometry; glayer.Graphics.Add(g); \/\/\u521d\u59cb\u5316Geometry Service GeometryService geometrytask = new GeometryService(“http:\/\/sampleserver1.arcgisonline.com\/ArcGIS\/rest\/services\/Geometry\/GeometryServer”); }        Geometry Service\u7684\u521d\u59cb\u5316\u4f7f\u7528\u6784\u9020\u51fd\u6570\u6765\u5b8c\u6210\u7684\uff0c\u91cc\u9762\u63a5\u53d7\u4e00\u4e2aURL\uff0c\u8fd9\u4e2a\u662fGeometry Service\u7684REST API Endpoint\u3002\u987a\u4fbf\u8bf4\u4e00\u4e0b\uff0c\u4e0d\u540c\u4e8e\u5176\u4ed6\u670d\u52a1\u6bd4\u5982MapService\uff0c\u4e00\u4e2aGIS Server\u53ea\u80fd\u53d1\u5e03\u4e00\u4e2aGeometryService\uff0c\u5e76\u4e14\u5b83\u7684\u540d\u79f0\u5fc5\u987b\u662fGeometry\u3002        \u5f53\u4e00\u4e2aTask\u5b8c\u6210\u65f6\u4f1a\u89e6\u53d1Completed\u4e8b\u4ef6\uff0c\u5931\u8d25\u65f6\u4e5f\u6709Failed\u4e8b\u4ef6\uff0c\u5bf9\u8fd9\u4e24\u4e2a\u4e8b\u4ef6\u8fdb\u884c\u76d1\u542c\uff1ageometrytask.BufferCompleted += … Continue reading ArcGIS API for Silverlight\u5f00\u53d1\u5165\u95e8\uff085\uff09\uff1a\u4efb\u52a1\u5916\u5305\u2014\u2014Tasks<\/span> 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