添加图层的和删除的图层的代码

最新推荐文章于 2022-08-30 09:00:00 发布

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#UI #Web #应用服务器 #Security

本文介绍如何在ArcGIS Server中使用C#代码动态添加和删除shp图层。通过示例代码展示了如何利用ArcObjects API进行图层管理，包括创建图层、设置样式以及从地图中移除图层等操作。

以下是从我的aspx.cs文件中拷贝出来的在ArcGIS Server中添加和删除shp图层的源码，用起来比较好用，代码出处是刘光的那本书。如果使用，可以把添加图层的和删除的图层的代码写成一个通用的函数，如 private void addPPISHPFile(string shpFilePath, string shpFileName, string LayerName, string FieldName) private void RemovePPISHPLayer(string LayerName) 使用就行，不多说了，关键是能解决问题。 using System; using System.Data; using System.Configuration; using System.Collections; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using ESRI.ArcGIS.Server; using ESRI.ArcGIS.Carto; using ESRI.ArcGIS.Geodatabase; using ESRI.ArcGIS.Geometry; using ESRI.ArcGIS.Display; using ESRI.ArcGIS.ADF.Web.DataSources.ArcGISServer; public partial class Default2 : System.Web.UI.Page, ICallbackEventHandler { public string addLayerCallback; private string callbackResponse; MapResourceLocal localMapResource = null; protected void Page_Load(object sender, EventArgs e) { addLayerCallback = ClientScript.GetCallbackEventReference(this, "message", "processCallbackresult", "context", "postBackError", true); } string ICallbackEventHandler.GetCallbackResult() { return callbackResponse; } void ICallbackEventHandler.RaiseCallbackEvent(string eventArgument) { if (eventArgument.Contains("addlayer")) { AddLayer(); } else if (eventArgument.Contains("removelayer")) { Session["layeradded"] = false; RemoveLayer(); } } #region 增加图层 //增加图层 private void AddLayer() { MapFunctionality agsMapFunctionality = Map1.GetFunctionality(0) as MapFunctionality; localMapResource = (MapResourceLocal)agsMapFunctionality.Resource; //使用ArcObjects增加图层 IServerContext mapContext = localMapResource.ServerContextInfo.ServerContext; IWorkspaceFactory workspaceFactory = (IWorkspaceFactory)mapContext.CreateObject("esriDataSourcesFile.ShapefileWorkspaceFactory"); IFeatureWorkspace featureWorkspace = workspaceFactory.OpenFromFile(@"D:\AGS_Data\GISData", 0) as IFeatureWorkspace; IFeatureLayer featureLayer = (IFeatureLayer)mapContext.CreateObject("esriCarto.FeatureLayer"); featureLayer.FeatureClass = featureWorkspace.OpenFeatureClass("States.shp"); featureLayer.Name = "States"; //应用着色器 ApplyRenderer(featureLayer, mapContext); IMapServerObjects mapServerObjects = localMapResource.MapServer as IMapServerObjects; IMap map = mapServerObjects.get_Map(localMapResource.DataFrame); map.AddLayer(featureLayer); map.MoveLayer(featureLayer, 0); //刷新服务器对象响应添加图层 localMapResource.RefreshServerObjects(); //刷新地图与Toc Toc1.Refresh(); Map1.CallbackResults.CopyFrom(Toc1.CallbackResults); Map1.Refresh(); callbackResponse = Map1.CallbackResults.ToString(); } #endregion #region 渲染图层 //设置动态要素图层的着色器对象 private void ApplyRenderer(IFeatureLayer featureLayer, IServerContext mapContext) { IGeoFeatureLayer geoLayer = (IGeoFeatureLayer)featureLayer; ISimpleRenderer simpleRender = (ISimpleRenderer)mapContext.CreateObject("esriCarto.SimpleRenderer"); IRgbColor rgbColor = (IRgbColor)mapContext.CreateObject("esriDisplay.RgbColor"); rgbColor.Red = 0; rgbColor.Green = 0; rgbColor.Blue = 210; esriGeometryType geometryType = featureLayer.FeatureClass.ShapeType; if (geometryType == esriGeometryType.esriGeometryPoint) { ISimpleMarkerSymbol symbol = (ISimpleMarkerSymbol)mapContext.CreateObject("esriDisplay.SimpleMarkerSymbol"); symbol.Color = (IColor)rgbColor; simpleRender.Symbol = (ISymbol)symbol; } else if (geometryType == esriGeometryType.esriGeometryPolyline) { ISimpleLineSymbol symbol = (ISimpleLineSymbol)mapContext.CreateObject("esriDisplay.SimpleLineSymbol"); symbol.Color = (IColor)rgbColor; simpleRender.Symbol = (ISymbol)symbol; } else if(geometryType == esriGeometryType.esriGeometryPolygon) { ISimpleFillSymbol symbol = (ISimpleFillSymbol)mapContext.CreateObject("esriDisplay.SimpleFillSymbol"); symbol.Color = (IColor)rgbColor; simpleRender.Symbol = (ISymbol)symbol; } else { throw new Exception("不能确定图层类型!"); } geoLayer.Renderer = (IFeatureRenderer)simpleRender; } #endregion #region 删除图层 //删除图层 private void RemoveLayer() { MapFunctionality agsMapFunctionality = Map1.GetFunctionality(0) as MapFunctionality; localMapResource = (MapResourceLocal)agsMapFunctionality.Resource; //通过ArcObjects 删除动态添加的图层 IMapServerObjects mapServerObjects = localMapResource.MapServer as IMapServerObjects; IMap map = mapServerObjects.get_Map(localMapResource.DataFrame); ILayer workingLayer = null; IEnumLayer enumLayer = map.get_Layers(null, true); ILayer loopLayer = null; while ((loopLayer = enumLayer.Next()) != null) { if (loopLayer.Name == "States") { workingLayer = loopLayer; } } map.DeleteLayer(workingLayer); //刷新服务器对象,响应删除图层 localMapResource.RefreshServerObjects(); Toc1.Refresh(); Map1.CallbackResults.CopyFrom(Toc1.CallbackResults); Map1.Refresh(); callbackResponse = Map1.CallbackResults.ToString(); } #endregion protected void Button1_Click(object sender, EventArgs e) { AddLayer(); } protected void Button2_Click(object sender, EventArgs e) { RemoveLayer(); } }