//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();
}
public PieRender(AxMapControl pMapcontrol, IFeatureLayer pFtLayer, string pFieldName1, string pFieldName2)
{
IGeoFeatureLayer pGeoFeaLayer = (IGeoFeatureLayer)pFtLayer;
IChartRenderer pChartRenderer = new ChartRendererClass();
// Set up the field to draw charts
IRendererFields pRenderFields = (IRendererFields)pChartRenderer;
pRenderFields.AddField(pFieldName1, pFieldName1);
pRenderFields.AddField(pFieldName2, pFieldName2);
IPieChartRenderer pPieChartRender = (IPieChartRenderer)pChartRenderer;
//计算最大值部分有待补充////////////////////////////////////
//Calculate the max value of the data field to scale the chart
//ICursor pCursor = new CursorClass();
IQueryFilter pQueryFilter = new QueryFilterClass();
//IRowBuffer pRow = new RowBufferClass();
ITable pTable = (ITable)pGeoFeaLayer;
pQueryFilter.AddField(pFieldName1);
ICursor pCursor = pTable.Search(pQueryFilter, true);
IDataStatistics pDataStat = new DataStatisticsClass();
IFeatureCursor pFtCursor = pFtLayer.FeatureClass.Search(null, false);
pDataStat.Cursor = pFtCursor as ICursor;
pDataStat.Field = pFieldName1;
double pMax = pDataStat.Statistics.Maximum;
IPieChartSymbol pPiechartSymbol = new PieChartSymbolClass();
IFillSymbol pFillSymbol = new SimpleFillSymbolClass();
IChartSymbol pChartSymbol = (IChartSymbol)pPiechartSymbol;
pPiechartSymbol.Clockwise = true;
pPiechartSymbol.UseOutline = true;
ILineSymbol pOutLine = new SimpleLineSymbolClass();
pOutLine.Color = GetRGBColor(255, 0, 255);
pOutLine.Width = 1;
pPiechartSymbol.Outline = pOutLine;
IMarkerSymbol pMarkerSymbol = (IMarkerSymbol)pPiechartSymbol;
//finally
pChartSymbol.MaxValue = pMax;
pMarkerSymbol.Size = 16;
//像符号数组中添加 添加符号
ISymbolArray pSymbolArray = (ISymbolArray)pPiechartSymbol;
pFillSymbol.Color = GetRGBColor(213, 212, 252);
pFillSymbol.Outline = pOutLine;
pSymbolArray.AddSymbol((ISymbol)pFillSymbol);
//////////////////////////
pFillSymbol.Color = GetRGBColor(183, 242, 122);
pFillSymbol.Outline = pOutLine;
pSymbolArray.AddSymbol((ISymbol)pFillSymbol);
//set up the background
pFillSymbol.Color = GetRGBColor(239, 228, 190);
pChartRenderer.BaseSymbol = (ISymbol)pFillSymbol;
pChartRenderer.UseOverposter = false;
pPieChartRender.MinSize = 1;
pPieChartRender.MinValue = pDataStat.Statistics.Minimum;
pPieChartRender.FlanneryCompensation = false;
pPieChartRender.ProportionalBySum = true;
pChartRenderer.ChartSymbol = (IChartSymbol)pPiechartSymbol;
pChartRenderer.CreateLegend();
pGeoFeaLayer.Renderer = (IFeatureRenderer)pChartRenderer;
pMapcontrol.ActiveView.Refresh();
}
public void InitRendererObject(List <FieldInfo> pFields, IFeatureRenderer pRenderer, esriSymbologyStyleClass _SymbologyStyleClass)
{
listAddField.Items.Clear();
flag = true;
m_SymbologyStyleClass = _SymbologyStyleClass;
if (!(pRenderer is IChartRenderer))//ÅжÏÊÇ·ñÊÇͼ±íäÖȾ
{
return;
}
IChartRenderer pPieChartRenderer = pRenderer as IChartRenderer;
if (pPieChartRenderer.ColorScheme != "")//ÑÕÉ«·½°¸
{
cmbColorRamp.Text = pPieChartRenderer.ColorScheme;
}
if (pPieChartRenderer.BaseSymbol != null)//±³¾°
{
labelPreviewBack.Tag = pPieChartRenderer.BaseSymbol;
}
else
{
labelPreviewBack.Tag = ModuleCommon.CreateSymbol(m_SymbologyStyleClass);
}
labelPreviewBack.Image = ModuleCommon.Symbol2Picture(labelPreviewBack.Tag as ISymbol, ModuleCommon.ImageWidth, ModuleCommon.ImageHeight);
if (pPieChartRenderer.UseOverposter)//·ÀÖ¹¸²¸Ç
{
chkIsUnOverlap.Checked = true;
}
else
{
chkIsUnOverlap.Checked = false;
}
IPieChartRenderer pPCR = pPieChartRenderer as IPieChartRenderer;
IMarkerSymbol pMS = pPieChartRenderer.ChartSymbol as IMarkerSymbol;
sizeInput.Value = pMS.Size; //´óС
IRendererFields pRenderFields = pPieChartRenderer as IRendererFields; //×Ö¶Î
ISymbolArray pSymbolArray = pPieChartRenderer.ChartSymbol as ISymbolArray;
listAddField.SmallImageList.Images.Clear();
List <string> fdLst = new List <string>();//¼Ç¼äÖȾ¶ÔÏóÒÑÓÃ×Ö¶Î
for (int i = 0; i < pRenderFields.FieldCount; i++)
{
listAddField.SmallImageList.Images.Add("Symbol" + i.ToString(), ModuleCommon.Symbol2Picture(pSymbolArray.get_Symbol(i), ModuleCommon.ImageWidth, ModuleCommon.ImageHeight));
System.Windows.Forms.ListViewItem item = new System.Windows.Forms.ListViewItem();
item.Name = "Item" + i;
item.Text = "";
item.ImageKey = "Symbol" + i.ToString();
item.Tag = pSymbolArray.get_Symbol(i);
System.Windows.Forms.ListViewItem.ListViewSubItem subItem = new System.Windows.Forms.ListViewItem.ListViewSubItem();
subItem.Text = pRenderFields.get_Field(i);
item.SubItems.Add(subItem);
listAddField.Items.Add(item);
fdLst.Add(pRenderFields.get_Field(i));
}
if (listAddField.SmallImageList.Images.Count >= 0)
{
selnum = pFields.Count;
pSymbols = CreateSymbols(selnum);
int ii = 0;
foreach (FieldInfo fi in pFields)
{
listAddField.SmallImageList.Images.Add("Symbol" + ii.ToString(), ModuleCommon.Symbol2Picture(pSymbols[ii], ModuleCommon.ImageWidth, ModuleCommon.ImageHeight));
ii++;
}
}
foreach (FieldInfo fi in pFields)
{
if (fi.FieldName != "<NONE>" && !fdLst.Contains(fi.FieldName))
{
listAllField.Items.Add(fi.FieldName);
}
}
flag = false;
}
//PieChartRenderer
private void button7_Click(object sender, EventArgs e)
{
IGeoFeatureLayer geoFeatureLayer;
IFeatureLayer featureLayer;
ITable table;
ICursor cursor;
IRowBuffer rowBuffer;
//设置饼图的要素
string field1 = "sqmi";
string field2 = "sqkm";
//获取渲染图层
geoFeatureLayer = getGeoLayer("Continents");
featureLayer = geoFeatureLayer as IFeatureLayer;
table = featureLayer as ITable;
geoFeatureLayer.ScaleSymbols = true;
IChartRenderer chartRenderer = new ChartRendererClass();
IPieChartRenderer pieChartRenderer = chartRenderer as IPieChartRenderer;
IRendererFields rendererFields = chartRenderer as IRendererFields;
rendererFields.AddField(field1, field1);
rendererFields.AddField(field2, field2);
int[] fieldIndexs = new int[2];
fieldIndexs[0] = table.FindField(field1);
fieldIndexs[1] = table.FindField(field2);
//获取渲染要素的最大值
double fieldValue = 0.0, maxValue = 0.0;
cursor = table.Search(null, true);
rowBuffer = cursor.NextRow();
while (rowBuffer != null)
{
for (int i = 0; i < 2; i++)
{
fieldValue = double.Parse(rowBuffer.get_Value(fieldIndexs[i]).ToString());
if (fieldValue > maxValue)
{
maxValue = fieldValue;
}
}
rowBuffer = cursor.NextRow();
}
//设置饼图符号
IPieChartSymbol pieChartSymbol = new PieChartSymbolClass();
pieChartSymbol.Clockwise = true;
pieChartSymbol.UseOutline = true;
IChartSymbol chartSymbol = pieChartSymbol as IChartSymbol;
chartSymbol.MaxValue = maxValue;
ILineSymbol lineSymbol = new SimpleLineSymbolClass();
lineSymbol.Color = getRGB(255, 0, 0);
lineSymbol.Width = 2;
pieChartSymbol.Outline = lineSymbol;
IMarkerSymbol markerSymbol = pieChartSymbol as IMarkerSymbol;
markerSymbol.Size = 30;
//添加渲染符号
ISymbolArray symbolArray = pieChartSymbol as ISymbolArray;
IFillSymbol fillSymbol = new SimpleFillSymbolClass();
fillSymbol.Color = getRGB(0, 255, 0);
symbolArray.AddSymbol(fillSymbol as ISymbol);
fillSymbol = new SimpleFillSymbolClass();
fillSymbol.Color = getRGB(0, 0, 255);
symbolArray.AddSymbol(fillSymbol as ISymbol);
chartRenderer.ChartSymbol = pieChartSymbol as IChartSymbol;
fillSymbol = new SimpleFillSymbolClass();
fillSymbol.Color = getRGB(100, 100, 100);
chartRenderer.BaseSymbol = fillSymbol as ISymbol;
chartRenderer.UseOverposter = false;
//创建图例
chartRenderer.CreateLegend();
geoFeatureLayer.Renderer = chartRenderer as IFeatureRenderer;
this.axMapControl1.Refresh();
}
private void btn_OK_Click(object sender, EventArgs e)
{
string LayerName = cbx_Layer.SelectedItem.ToString();
IGeoFeatureLayer pGeoFeatureLayer = (IGeoFeatureLayer)m_FeatureLayer;
ITable pTable = (ITable)pGeoFeatureLayer;
ICursor pCursor = pTable.Search(null, true);
int numFields = lstbx_RightFields.Items.Count;
string[] fildName = new string[numFields];
int[] fieldIndecies = new int[numFields];
for (int i = 0; i < numFields; i++)
{
if (lstbx_RightFields.Items[i].ToString() != "None")
{
fildName[i] = lstbx_RightFields.Items[i].ToString();
fieldIndecies[i] = pTable.FindField(fildName[i]);
}
else
{
MessageBox.Show("不可用的字段,请选择其它图层");
return;
}
}
//fieldIndecies[0] = pTable.FindField(strPopField1);
//fieldIndecies[1] = pTable.FindField(strPopField2);
bool firstValue = true;
double dmaxValue = 0.0;
//Iterate across each feature
IRowBuffer pRowBuffer = pCursor.NextRow();
double dfieldValue;
while (pRowBuffer != null)
{
// iterate through each data field and update the maxVal if needed
for (int lfieldIndex = 0; lfieldIndex <= numFields - 1; lfieldIndex++)
{
dfieldValue = (double)pRowBuffer.get_Value(fieldIndecies[lfieldIndex]);
if (firstValue)
{
// Special case for the first value in a feature class
dmaxValue = dfieldValue;
firstValue = false;
}
else
{
if (dfieldValue > dmaxValue)
{
// we've got a new biggest value
dmaxValue = dfieldValue;
}
}
}
pRowBuffer = pCursor.NextRow();
}
if (dmaxValue <= 0)
{
MessageBox.Show("Failed to gather stats on the feature class");
return;
}
IChartRenderer pChartRenderer = new ChartRendererClass();
//Set up the fields to draw charts of
IRendererFields pRendererFields = (IRendererFields)pChartRenderer;
for (int i = 0; i < numFields; i++)
{
pRendererFields.AddField(fildName[i], fildName[i]);
}
// Set up the chart marker symbol to use with the renderer
IPieChartSymbol pPieChartSymbol;
pPieChartSymbol = new PieChartSymbolClass();
//饼图使用顺时针方法
pPieChartSymbol.Clockwise = true;
//饼图有外轮廓线
pPieChartSymbol.UseOutline = true;
IChartSymbol pChartSymbol = (IChartSymbol)pPieChartSymbol;
pChartSymbol.MaxValue = dmaxValue;
ILineSymbol pOutline;
pOutline = new SimpleLineSymbolClass();
pOutline.Color = getRGB(213, 212, 252);
pOutline.Width = 1;
//设置外轮廓线的样式
pPieChartSymbol.Outline = pOutline;
IMarkerSymbol pMarkerSymbol = (IMarkerSymbol)pPieChartSymbol;
pMarkerSymbol.Size = 8;
IColorRamp pColorRamp = (IColorRamp)m_StyleGallertItem.Item;
pColorRamp.Size = pTable.RowCount(null);
bool ok = true;
pColorRamp.CreateRamp(out ok);
IEnumColors pEnumRamp = pColorRamp.Colors;
IFillSymbol pFillSymbol;
ISymbolArray pSymbolArray = (ISymbolArray)pPieChartSymbol;
for (int i = 0; i < numFields; i++)
{
pFillSymbol = new SimpleFillSymbolClass();
for (int j = 0; j < 8; j++)
{
pEnumRamp.Next();
}
pFillSymbol.Color = pEnumRamp.Next();
pSymbolArray.AddSymbol((ISymbol)pFillSymbol);
}
//Now set the barchart symbol into the renderer
pChartRenderer.ChartSymbol = (IChartSymbol)pPieChartSymbol;
// pChartRenderer.Label = "Population";
//set up the background symbol to use tan color
pFillSymbol = new SimpleFillSymbolClass();
pFillSymbol.Color = m_BackGroundColor;
pChartRenderer.BaseSymbol = (ISymbol)pFillSymbol;
pChartRenderer.UseOverposter = false;
IPieChartRenderer pPieChartRenderer = pChartRenderer as IPieChartRenderer;
pPieChartRenderer.MinSize = 3;
//设置最小值，用于尺寸比例
pPieChartRenderer.MinValue = 453588;
pPieChartRenderer.FlanneryCompensation = false;
pPieChartRenderer.ProportionalBySum = true;
//pChartRenderer.Label = "Population";
//产生图例对象
pChartRenderer.CreateLegend();
//pdate the renderer and refresh the screen
pGeoFeatureLayer.Renderer = (IFeatureRenderer)pChartRenderer;
m_MapControl.ActiveView.ContentsChanged();
m_MapControl.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography, null, null);
}
