ArcIMS根据查询结果定位并高亮显示（面图层的定位）（ADF+C#）

最新推荐文章于 2023-12-12 15:16:46 发布

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本文介绍如何使用 ArcGIS Web API 实现地图上特定面的定位及高亮显示，通过设置过滤条件和符号化来实现目标面的突出显示，并调整地图视图以聚焦查询结果。

//定位到指定的面，并高亮显示

ESRI.ArcGIS.ADF.Web.DataSources.IMS.MapFunctionality mf = (ESRI.ArcGIS.ADF.Web.DataSources.IMS.MapFunctionality)Map1.GetFunctionality(0); ;

ESRI.ArcGIS.ADF.IMS.Carto.MapView mv= mf.MapView;

ESRI.ArcGIS.ADF.IMS.Carto.Layer.FeatureLayer queryLayer;

queryLayer = (FeatureLayer)mv.Layers.FindByName("SDE.SDE.行政分区");

Filter queryFilter = new Filter();

string strSQL = "objectid='1''";

queryFilter.WhereExpression = strSQL;

QueryParameters queryParams = new QueryParameters(queryFilter);

queryFilter.Tolerance = 20;

queryFilter.ToleranceUnits = BufferUnits.Meters;

queryParams.ReturnGeometries = true;

queryParams.ReturnGlobalEnvelope = true;

queryLayer.Visible = true;

FeatureTable ft = queryLayer.Query(queryParams);

//缩放至查询结果的区域

if (ft.Rows.Count != 0)

{

ESRI.ArcGIS.ADF.IMS.Geometry.Geometry featureGeom = (ESRI.ArcGIS.ADF.IMS.Geometry.Geometry)ft.Rows[0]["#SHAPE#"];

ESRI.ArcGIS.ADF.Web.Geometry.Geometry adfGEom = ESRI.ArcGIS.ADF.Web.DataSources.IMS.Converter.ToADFGeometry(featureGeom);

ESRI.ArcGIS.ADF.Web.Geometry.Envelope adfEnv = ESRI.ArcGIS.ADF.Web.Geometry.Envelope.GetMinimumEnclosingEnvelope(adfGEom);

Map1.Extent = adfEnv;

}

ESRI.ArcGIS.ADF.IMS.Display.Symbol.FeatureSymbol selSymbol = new ESRI.ArcGIS.ADF.IMS.Display.Symbol.SimpleFillSymbol(System.Drawing.Color.Yellow, System.Drawing.Color.Red, PolygonFillType.Solid);

selSymbol.Transparency = 10;

ESRI.ArcGIS.ADF.IMS.Display.Renderer.ValueMapRenderer selValueMapRenderer = new ESRI.ArcGIS.ADF.IMS.Display.Renderer.ValueMapRenderer("", selSymbol, "名称");

FeatureLayer hilightLayer = queryLayer.CreateSelectionLayer(queryFilter, selValueMapRenderer, "hilightlayer");

hilightLayer.Name = "SelectedPARCEL";

//将图层添加到mapView中

if (mv.Layers.FindByName("SelectedPARCEL") == null)

{

mv.Layers.Add(hilightLayer);

}

else

{

mv.ClearSelectionLayers();

mv.Layers.Add(hilightLayer);

}