//创建饼状专题图
public static void CreatePieTheme(System.Web.UI.Page page, int nLayerID, string[] fields)
{
if (page == null)
{
return;
}
// 得到地图服务下的ArcObjects map对象
ESRI.ArcGIS.Server.IServerContext pServerContext = GetServerContext(page);
ESRI.ArcGIS.Carto.IMapServer mapServer = (ESRI.ArcGIS.Carto.IMapServer)pServerContext.ServerObject;
ESRI.ArcGIS.Carto.IMapServerObjects2 mapServerObjects = (ESRI.ArcGIS.Carto.IMapServerObjects2)mapServer;
string mapName = mapServer.DefaultMapName;
ESRI.ArcGIS.Carto.IMap aoMap = mapServerObjects.get_Map(mapName);
ESRI.ArcGIS.Carto.ILayer pLayer = aoMap.get_Layer(nLayerID);//得到图层
ESRI.ArcGIS.Carto.IGeoFeatureLayer pGeoLayer = pLayer as IGeoFeatureLayer;
//设置专题图的属性列表
ESRI.ArcGIS.Carto.IChartRenderer pCharRenderer = pServerContext.CreateObject("esriCarto.ChartRenderer") as IChartRenderer;
ESRI.ArcGIS.Carto.IRendererFields pRenderFields = pCharRenderer as IRendererFields;
foreach (string var in fields)
{
pRenderFields.AddField(var, var);
}
//实例化图表对象并取得元素指定属性的最大值
ESRI.ArcGIS.Display.IPieChartSymbol pPieSym = pServerContext.CreateObject("esriDisplay.PieChartSymbol") as ESRI.ArcGIS.Display.IPieChartSymbol;
ESRI.ArcGIS.Display.IChartSymbol pCharSym = pPieSym as ESRI.ArcGIS.Display.IChartSymbol;
pPieSym.Clockwise = true;
pPieSym.UseOutline = true;
pCharSym.MaxValue = GetStaMaxMin(fields, pGeoLayer)[0];
//设置饼图外围线
ISimpleLineSymbol pOutLine = pServerContext.CreateObject("esriDisplay.SimpleLineSymbol") as ISimpleLineSymbol;
pOutLine.Color = GetRGB(255, 0, 128, pServerContext);
pOutLine.Style = ESRI.ArcGIS.Display.esriSimpleLineStyle.esriSLSSolid;
pOutLine.Width = 1;
pPieSym.Outline = pOutLine;
IMarkerSymbol pMarkSym = pPieSym as IMarkerSymbol;
pMarkSym.Size = 5;
//设置饼状图填充效果
ESRI.ArcGIS.Display.ISymbolArray pSymArr = pPieSym as ISymbolArray;
ISimpleFillSymbol pSimFillSym = pServerContext.CreateObject("esriDisplay.SimpleFillSymbol") as ESRI.ArcGIS.Display.SimpleFillSymbol;
pSimFillSym.Color = GetRGB(128, 128, 128, pServerContext);
pSimFillSym.Outline = pOutLine;
Random randColor = new Random();
for (int i = 0; i < fields.Length; i++)
{
IFillSymbol pFillSym = pServerContext.CreateObject("esriDisplay.SimpleFillSymbol") as IFillSymbol;
pFillSym.Color = GetRGB(randColor.Next(255), randColor.Next(255), randColor.Next(255), pServerContext);
pSymArr.AddSymbol((ISymbol)pFillSym);
}
//设置地图图层背景
pSimFillSym = pServerContext.CreateObject("esriDisplay.SimpleFillSymbol") as ESRI.ArcGIS.Display.SimpleFillSymbol;
pSimFillSym.Color = GetRGB(255, 128, 255, pServerContext);
pCharRenderer.BaseSymbol = pSimFillSym as ISymbol;
//设置饼状图表属性
IPieChartRenderer pPieChartRenderer = pCharRenderer as IPieChartRenderer;
pPieChartRenderer.MinValue = 0.1;
pPieChartRenderer.MinSize = 1;
pPieChartRenderer.FlanneryCompensation = false;
pPieChartRenderer.ProportionalBySum = true;
pPieChartRenderer.ProportionalField = fields[0];
pCharRenderer.ChartSymbol = pPieSym as IChartSymbol;
pCharRenderer.Label = "面积";
//应用饼状专题到指定图层
pCharRenderer.UseOverposter = false;
pCharRenderer.CreateLegend();
pGeoLayer.Renderer = pCharRenderer as IFeatureRenderer;
//刷新地图显示图表及图例
mapServerObjects.RefreshServerObjects();
// Map1.RefreshResource("MapResourceItem0");
pServerContext.ReleaseContext();
}
//创建柱状专题图
public void CreateBarRenderer(int layerID, string[] fields)
{
// 得到地图服务下的ArcObjects map对象
ESRI.ArcGIS.Server.IServerContext pServerContext = GetServerContext();
ESRI.ArcGIS.Carto.IMapServer mapServer = (ESRI.ArcGIS.Carto.IMapServer)pServerContext.ServerObject;
ESRI.ArcGIS.Carto.IMapServerObjects2 mapServerObjects = (ESRI.ArcGIS.Carto.IMapServerObjects2)mapServer;
string mapName = mapServer.DefaultMapName;
ESRI.ArcGIS.Carto.IMap aoMap = mapServerObjects.get_Map(mapName);
ESRI.ArcGIS.Carto.ILayer pLayer = aoMap.get_Layer(layerID);//得到图层
ESRI.ArcGIS.Carto.IGeoFeatureLayer pGeoLayer = pLayer as IGeoFeatureLayer;
//设置专题图元素的属性名称列表
IChartRenderer pChartRender = pServerContext.CreateObject("esriCarto.ChartRenderer") as IChartRenderer;
IRendererFields pRenderFields = pChartRender as IRendererFields;
foreach (string var in fields)
{
pRenderFields.AddField(var, var);
}
//实例化图表对象并取得元素指定属性的最大值
IBarChartSymbol pBarChartSymbol = pServerContext.CreateObject("esriDisplay.BarChartSymbol") as IBarChartSymbol;
IChartSymbol pChartSymbol = pBarChartSymbol as IChartSymbol;
pChartSymbol.MaxValue = GetStaMaxMin(fields, pGeoLayer)[0];
pBarChartSymbol.Width = 8;
IMarkerSymbol pMarkerSymbol = pBarChartSymbol as IMarkerSymbol;
pMarkerSymbol.Size = 50;
//设置柱状图每列填充效果
ISymbolArray pSymbolArray = pBarChartSymbol as ISymbolArray;
Random ranColor = new Random();
for (int i = 0; i < fields.Length; i++)
{
IFillSymbol pFillSymbol = pServerContext.CreateObject("esriDisplay.SimpleFillSymbol") as IFillSymbol;
pFillSymbol.Color = GetRGB(ranColor.Next(255), ranColor.Next(255), ranColor.Next(255), pServerContext);
pSymbolArray.AddSymbol((ISymbol)pFillSymbol);
}
//设置地图图层背景
ESRI.ArcGIS.Display.ISimpleFillSymbol pFSymbol = pServerContext.CreateObject("esriDisplay.SimpleFillSymbol") as ESRI.ArcGIS.Display.SimpleFillSymbol;
pFSymbol.Color = GetRGB(239, 228, 249, pServerContext);
pChartRender.BaseSymbol = pFSymbol as ISymbol;
//应用柱状专题到指定图层
pChartRender.ChartSymbol = pBarChartSymbol as IChartSymbol;
pChartRender.Label = "Test";
pChartRender.UseOverposter = false;
pChartRender.CreateLegend();
pGeoLayer.Renderer = pChartRender as IFeatureRenderer;
//刷新地图显示图表及图例
mapServerObjects.RefreshServerObjects();
Map1.RefreshResource("MapResourceItem0");
Toc1.BuddyControl = "Map1";
//Toc1.Refresh();
Map1.Refresh();
pServerContext.ReleaseContext();
}